CN100540168C - Make the method for metal bat - Google Patents
Make the method for metal bat Download PDFInfo
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- CN100540168C CN100540168C CNB2004100301927A CN200410030192A CN100540168C CN 100540168 C CN100540168 C CN 100540168C CN B2004100301927 A CNB2004100301927 A CN B2004100301927A CN 200410030192 A CN200410030192 A CN 200410030192A CN 100540168 C CN100540168 C CN 100540168C
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Abstract
A kind ofly draw the method for the expection profile that is shaped along tubular workpiece external diameter, this method has provided selected workpiece to be had through the wall thickness of the unanimity of length direction, perhaps have terminal consistent wall thickness and middle-end gradually of wall thickness of attenuation combine.The external diameter of selected workpiece is reduced along a part that only is initial tubulose metal blank originally, method be the draw metal blank only part by a shaping mould or only part by in a succession of shaping mould each.
Description
Technical field
The present invention relates to the method that a kind of external diameter along a tubular workpiece draws the desired profile that is shaped, particularly relate to a kind of like this method, this method can be controlled the profile that changes along tubular workpiece and the unwanted pipe thickness that produces increases and this increase is minimized, this method is particularly useful to the tubular workpieces of metal of form metal bat or shaping in a similar manner, and these tubular workpieces of metal have the profile that satisfies accurate shape and wall thickness requirement.
Background technology
Although this method provides workpiece useful too for the manufacturing for forming part in the construction package, bicycle frame as lightweight, the required type of high-intensity sports bicycle, but this paper is not limited only to this, and the present invention is specially adapted to provide workpiece for the manufacturing of metal bat.The manufacture method of bat and the improvement on design and material are the themes of numerous patents over more than 100 year in the past, and wherein most of patents are at being used for bat that Baseball and Softball move.Baseball bat is made by hardwood at first, and up to today, employed baseball bat is made by hardwood all in the professional baseball league matches.For many years, in order to satisfy the demand of the universalness that this motion rolls up, the league matches of particularly half specialized, university and little Baseball and Softball federation tissue, the quantity of bat increases greatly.Particularly owing to be used to make the shortage of the suitable hardwood of bat, and the relatively short rapid wear life-span of wooden bat, people have been used for making the more good material of bat in searching.A kind of early stage method is to select the substitution material of metal as hardwood material.The patent that nineteen twenty-six is authorized L.Middlekauff discloses a kind of bat of being made by tapered steel pipe No. 1611858, and this steel pipe is shaped by the rolling thin slice that narrows down gradually that has mating edge, and mating edge connects along scan line and forms this pipe.Nineteen forty-four, the patent of authorizing T.Taylor disclosed a kind of cast structure of thin sidewalls bat for No. 2340156, and this thin sidewalls is by vertically reinforcing through the rib of bat length direction.
After this, patented technology concentrates on seamless light-weight metal tubing, and as aluminium and titanium, they are used as common and optimal parent material.Yet, the several different methods of light-weight metal pipe manufacturer bat further being tested and studied the back discovery, there is an overall requirement, promptly the operating characteristic of metal bar must be very closely similar with the operating characteristic of wooden bat.In particular, metal bar must show the distribution of weight of wooden bat, and wooden bat is in the feel and sound of square stance.Have in the bat surface profile in that metal tube finally is configured as, the metal manufacturing procedure to required generally adopts the rotary swaging method.As an interchangeable method, the feature contour that the patent of authorizing T.Plougehe discloses metal bar for No. 5626050 also can adopt cold Pilger (cold pilger) method manufacturing.Adopt rotary swaging method or cold Pilger method to realize that the shaping operation of feature profile rod all relates to reducing of metal tube overall diameter, thisly reduce to be to produce by the inside radial pressure that applies along the selected length direction of metal tube.The radial pressure that is applied has also played the effect that thickens to that part of tube wall that has been reduced external diameter in the pipe, the positive example that is reduced to that thickens general and diameter of this wall.Authorize the patent of A.Merola and described for No. 3479030, compare with wooden bat, this wall thicken the balance and the distribution of weight that can have influence on negatively along bat length extending direction.No. 5626050 disclosed cold Pilger process of patent of authorizing No. the 3854316th, the patent of R.Wilson and authorizing T.Ploughe all discloses, in rotary swaging method or cold Pilger method, in the inner chamber of pipe, insert shaping axle respectively and can offset and be accompanied by that diameter reduces and the wall thickening that produces.The use of interior axle is useful for the control valve wall thickening, but has significantly increased the metal cost of processing, and has increased the mechanical stress that is used to reduce external diameter of pipe greatly.
Someone has proposed a kind of like this method, be that the metal bar shaping operation is to begin with a pipe embryo spare with transformable wall, as being used for offsetting along a kind of measure of the wall thickening of the metal tube of length of tube direction, wherein the minimizing of outer diameter has appearred in the place of wall thickening thus.For the back that is shaped at outline obtains the wall thickness of expection, required changed wall thickness and be suggested and realized in several modes along the position of metal tube blank.The patent of authorizing I.Scott disclosed before pipe is shaped the machining of metal tube blank outside for No. 3841130.The patent of authorizing No. the 3807213rd, the patent of Willis and authorizing F.Siemonsen all discloses for No. 4089199, in order to produce the expected results of metal blank, promptly generate the blank that has constant outer diameter and can change wall thickness, the method for cold forming pipe embryo spare on shaping axle.The patent of authorizing F.Darner discloses for No. 2240456 and has adopted tapered control lever shaft to draw blank multistage and that have the constant outer diameter that changes wall thickness.Initial blank has and can change wall thickness and generally can solve the control wall thickness, and the problem that changes the position of wall thickness along finished product bat length direction.Yet, produce the normally rotary swaging method of metal manufacturing procedure of final outline, promptly produce the low performance rod.When the handle of bat and transition portion need thin tube wall, promptly the tube wall than the obtained bat of original tube blank of constant wall is thinner, and this thinner wall can begin to obtain by the original metal blank from thin changed wall.High-performance and expensive bat exist this requirement than the light wall pipe wall.
An object of the present invention is to provide a kind of swedged method; reduction only was the diameter on one section designated length of tubular metal blank originally; the method that adopts is to spur metal blank in mould or a succession of mould by applying pulling force; thereby owing to minimizing of thickness of pipe wall increase reduces diameter, this effect can strengthen by selecting an initial blank that has the wall thickness of selected attenuation gradually.
Another object of the present invention provides a kind of tubular metal blank and draws the operation that is shaped, and wherein the continuous drawing operation is with the profile that generates expection, does not need intermediate annealing, particularly for the workpiece that comprises aluminium and aluminium alloy.
Another purpose of the present invention provides a kind of drawing operation of using shaping mould to manufacture a product, this operation is applicable to the performance characteristics that forms bat, high performance nature is that the shaping by thin-walled portion produces, and thin-walled portion can strengthen by selecting have the initial blank that can change wall thickness.
A further object of the present invention provides a kind of drawing shaping operation for bat or similar workpiece, wherein multistep draws to operate by operating with second step or any additional drawing and is performed, these draw operation is to control by the pressure that restriction is applied on the metal blank, and this pressure is subjected to being used to drawing the profile of mould of operation and labour-intensive opposing.The radial pressure that the rotary swaging method is produced makes along the metal of the part of bat top external diameter minimizing hardens, particularly at handle portion.When aluminium alloy is selected to high-performance, more expensive bat owing to its hardness, the sclerosis of aluminum metal is so strong, the rotary swaging method action need of required bat outline is by twice die forging so that be used to be shaped, this twice die forging by an intermediate annealing operation separately do not produce crack or fracture to guarantee metal in the rotary swaging process.
The present invention will avoid the unfavorable factor of using rotary swaging and cold Pilger method to be brought, these methods by draw a blank only part carry out by a shaping mould or by a succession of shaping mould.Drawing method of the present invention reduces the external diameter of metal tube blank, yet especially compare with the unwanted increase of those thicknesss of pipe wall that produced under the effect of rotary swaging and cold Pilger method, method of the present invention greatly reduces the increase of the thickness of pipe wall that is brought when diameter reduces.Another advantage of using shaping mould to draw the original tube blank is when drawing operates in the forming tube blank, to have produced quite few metal works sclerosis.Reached so favourable degree owing to reduce the pulling force that is presented in the operation of size, to such an extent as to the finished ball rod outside diameter of expection can the most easily be made, even when the pipe metal blank comprises the alloy of the rational energy of harder objuct that shows aluminium, do not need the intermediate annealing operation yet.Therefore, the invention provides such advantage, i.e. intermediate annealing operation generally can not adopted.Drawing method of the present invention produces the acceptable product by the initial blank that uses constant wall thickness, particularly the lower-performance bat.
Summary of the invention
The method of a kind of manufacturing metal bat moulding external diameter (Contouredouter diameter) is proposed according to the present invention; this method comprises that selection has the step of the initial tubulose metal blank of constant outer diameter; this constant outer diameter is identical with the external diameter that desired finished product bat rod-rod-body divides basically; wherein initial tubulose metal blank has constant wall thickness; this wall thickness is identical with the wall thickness that the finished product bat rod-rod-body of expection divides basically; this method comprises that also reducing only was the step of the external diameter of an initial tubulose metal blank part originally, its step be the draw metal blank only part by a shaping mould or only part by in a succession of shaping mould each.
Provided a kind of method of making metal bat moulding external diameter according to a further aspect in the invention; this method comprises that selection has the step of the initial tubulose metal blank of variableization wall thickness; can change wall thickness and start from a preposition; this method comprises that also reducing originally only is the step of external diameter of a part of initial tubulose metal blank; external diameter reduce be by the draw metal blank only part by shaping mould or only part by in a succession of shaping mould each; the drawing of blank starts from described precalculated position; purpose reduces external diameter; simultaneously wall thickness being produced fully increases, thereby makes its constant wall thickness with the expection of described finished product bat consistent basically.
Description of drawings
When describing below reading according to accompanying drawing, characteristics of the present invention and advantage etc. will more fully be understood, wherein:
Fig. 1 is a tubular blank, is to represent with a vertical section that demonstrates constant wall thickness;
Fig. 2 is a tubular blank, is to represent with a vertical section that demonstrates transformable wall thickness along the blank length direction;
Fig. 3 is a typical bat that comprises wall thickness and part mark;
Fig. 4 A, 4B and 4C are the key diagrams of a series, have described the pointing to a selected tubular metal blank;
Fig. 5 A, 5B, 5C and 5D are serial key diagrams of the preferred embodiment of the present invention, and the use of the shaping mould of the tapered part that is used to make bat and handle portion is described;
Fig. 6 is the schematic diagram of the fluid pressure line of the preferred embodiment of the present invention, and fluid pressure line is tried to stop people from fighting each other and is connected with one, partly passes through shaping mould with the pulling workpiece;
After Fig. 7 is the drawing operation shown in Fig. 5 A-5D, the semi-finished product figure of bat; And
Fig. 8 A, 8B and 8C are the key diagrams of a series of second embodiment of the invention, and the use of the shaping mould of the tapered part that is used to make bat and handle portion is described.
The specific embodiment
Fig. 1 and Fig. 2 understand that for example being used for the method according to this invention metal draws two suitable initial tubulose metal blanks 10 and 12 operating, is used to make the moulding outer surface of metal bat expection.Selection metal blank 10 and 12 all within the scope of the invention, is preferably aluminum or aluminum alloy from any suitable ferrous and nonferrous metals.The notable attribute of the pipe metal blank among Fig. 1 is to have consistent wall thickness T 1, and wall thickness T 1 runs through the whole length of metal blank.This wall thickness can be selected consistent with the expection wall thickness of cylindrical portion 14 of finished product metal bat 16 among Fig. 3.Cylindrical portion 14 is not changed in different metal process operations in fact, in the drawing operation that is used in particular for producing bat transition portion 18 and handle portion 20, is not changed yet.The drawing operation of transition portion and handle portion is used to be shaped, wall thickness T 4 along tapered wall on the transition portion 18 final contour directions has been produced a common little increase, to having produced bigger a little increase along the final wall thickness T 5 on the handle portion 20 final contour directions.Past, adopt rotary swaging method or cold Pilger method metal to be reduced the diameter of blank, wall thickness to metal blank produces so big increase, increase such as 80% to 100%, this increase is owing to the metal manufacturing procedure, it is influential comparatively speaking that such wall thickness is increased in the production of low performance bat, and to the production of high-performance bat, its influence is just more remarkable.According to the preferred embodiment of the present invention, compare with wall thickness T 1, wall thickness T 4 and T5 are generally in than wall thickness T 1 big 25% to 30% scope.When a kind of high-performance bat is made in expectation, the invention provides initial tubulose metal blank 12 shown in Figure 2, it has transformable wall thickness, usually represent with reference character T2, blank 12 is tapered continuously along the length direction of mid portion 22, and comprise the transition from constant wall thickness T3 to reverse constant wall thickness T1, T3 is the constant wall thickness along the relative thin of end portion 23 length directions, and T1 is the thick relatively constant wall thickness along opposite end portion 24 length directions.As indicated above, the changed wall thickness of realizing providing required and known along the position of metal tube blank itself has explanation in the patent of formerly having checked.Therefore, the blank that can change tube wall can be made by along the tapered longitudinally axle of the inherence of a total length the initial blank of constant wall thickness being forced by a finishing die, also can by in one be tapered and back and forth on the foreshortened length of the axle of (tapered andreciprocated), the initial blank that draws constant wall is made by a finishing die.End portion 24 will comprise the cylindrical portion of finished product bat.According to the inventive method, 22 and 23 parts of tubular metal blank have produced reducing of diameter owing to draw operation.Along gradually changing of the wall thickness of part 22 is a variable along that part of wall thickness of the metal blank under drawing operation of the present invention, this size that gradually changes can be selected so that drawn operation or operated the increase along transition portion 18 and handle portion 20 wall thickness that causes by the present invention, can enough produce final wall thickness, and the wall thickness identical originally with cylindrical portion 14 is consistent.In this way, be consistent basically along the wall thickness of the whole length of bat, so that performance characteristics desired on the industry to be provided.
Fig. 4 A, 4B and 4C have schematically illustrated the operation of preliminary metal forming, the end portion that reduces that on selected metal blank, is shaped, thus method is by carry out repeatedly pointing on the length of a weak point of blank it to be reduced.A pointing mould 26 makes first section 28 of blank to be reduced to a diameter D1 who is reduced at first.Next step pointing reduces to manipulate mould 30 diameter D1 further is reduced to diameter D2, and has increased the length that is reduced part 32.Additional pointing mould may be by usefulness, is used to produce diameter D5 along the final expection of section 36 up to final mould 34, as most preferred embodiment Fig. 5 A of the present invention, and 5B, shown in 5C and the 5D, this diameter is suitable for matching with clamp 38.One is used replacement method that mould carries out the pointing operation also within the scope of the invention, promptly use the known forging die pressure method of returning in this area itself that the end portion diameter of initial workpiece is reduced to along the diameter D5 of the final expectation of section 36, diameter D5 can be engaged by clamp 38.Clamp 38 is the parts that draw machinery, and this is known in this area, and except as shown in Figure 6, each clamp all is bonded to one and tries to stop people from fighting each other on 40, and this is tried to stop people from fighting each other and drives reciprocating by hydraulically powered piston and housing assembly 42.The method according to this invention, initial pipe draws manipulates the method for piston and housing assembly 42 being carried out Position Control, determines the length of tubular blank, shown in Fig. 5 A and 5C, 44, the second moulds of first mould that tubular blank is drawn by at least two moulds that use continuously are moulds 46.Adopt the form of limit switch 48 on the Position Control strategy, limit switch is positioned on the mobile path of trying to stop people from fighting each other, to determine by the predetermined length of drawing by the workpiece of the forming wall 44A of mould 44.When limit switch 40 contacts and when working, just carries a signal of telecommunication to give solenoid or other suitable controller 50 with trying to stop people from fighting each other, be used for operating in one direction cross valve 52, thereby stop at the linear movement of hydraulic piston in the housing assembly 42.Valve 52 is transferred to a direction by solenoid 54, and this direction is opposite with the direction of displacement of the valve that solenoid 50 is produced.Valve 52 is supplied with the hydraulic fluid of supercharging by pump 56, and pump 56 is driven by motor 58, and fluid pressure is by 60 controls of an adjustable pressure safety valve.Valve 60 operationally be used for second or any further pipe draw step, limit the pressure that acts on owing to contacting on the tube-surface with the molded surface 46A of mould 46.
A cross section A has been established in the pipe pointing operation of a selected tubular blank, is positioned at the junction of constant diameter pipeline section L1 and frustoconical pipeline section C1.The selected metal stock that is provided by the operation of Fig. 4 A-4C pointing at first is inserted into and is advanced to a point along the cavity of shaping mould 44 subsequently, wherein frustoconical tube portion C1 is whole is present in the mould cavity, and cross section A has preliminary in place contacting with the shaping mould surface.Piston and housing assembly 42 are operated in one direction, and partly by mould, as setting up among Fig. 5, the frustoconical pipeline section C2 that is elongated ends at cross section B with the pulling tubular workpiece, and changeover portion J1 displays in mould from cross section B.The length of frustoconical tube portion C2 and J1 is determined by a sufficient length of limit switch 48 and initial tubular blank, thus the cylindrical portion 14 of shaping bat 16.
The workpiece that is partly drawn is removed from mould 44, method is the moving direction reversing that makes the workpiece end part that is drawn, with the degree that reaches a necessity make workpiece can be free by and break away from mould 44 so that after workpiece discharges from clamp 38, can from mould 44, be moved out of.The workpiece that subsequent section is drawn is inserted into and is pushed on the point along shaping mould cavity 46A at first, wherein changeover portion J1 only partly is present in the mould cavity, and cross section B is positioned at the place that a spacer segment distance is partly arranged with the constant diameter of the profile die surface port of export.Second clamp 38A that tries to stop people from fighting each other engages with the end that is drawn workpiece, and this workpiece end displays from the port of export of mould.As just described, the relation of the shaping mould of workpiece that is partly drawn and mould 46 surface 46A is shown in Fig. 5 C.Of the present invention next step comprises that another draws operation, start piston and housing assembly 42, make it spur the tubular workpiece that is partly drawn again and only partly pass through mould 46 in a direction, as setting up among Fig. 5 D, formed a final desired butt transition portion C3, this transition portion has the handle portion of a constant diameter, and this handle portion has the section H1 that a part extends out from mould.Piston is by fluid pressure operated, and the size of fluid pressure is subjected to the restriction of the adjusting of adjustable pressure safety valve 60.By the operation of this drawing program, as shown in Figure 7, transition portion is formed, and has tapered surface, an outside, and does not have the cross section B of preexist between frustoconical portion C 2 and changeover portion J1.When the handle portion that has constant diameter draws from mould, cylindrical portion keeps not changed by the operation of mould 46.Usually the end portion that clamp 38A and 38 can one section weak point of interlocks, the end portion of this section weak point has exceeded the length of finished product handle portion, and the end portion of this section weak point is selected by the producer, can go out of use, and perhaps is allowed to keep the part as handle.Now, the one skilled in the art understood as one, may need be shaped workpiece with stiffness characteristics and dimensional requirement of plural shaping mould, thereby was shaped as shown in Figure 3 final bat.In addition, as shown in Figure 3, the final structure of bat comprises an end cap 70 of the terminal that is added on handle portion 20 and is added on an end plug 72 of the terminal of cylindrical portion 14.
Second embodiment of the present invention such as Fig. 8 A, 8B and 8C comprise that in fact shaping mould 80 has a shaping mould surface 80A with the be shaped method of a rod of a unique shaping mould 80.The same with the preferred embodiment of the present invention, second embodiment used the tubular metal blank of a selected elongation, as described in Fig. 1 and Fig. 2 and shown in.Selected tubular blank at first need be through the operation of pipe pointing, as Fig. 4 A, shown in 4B and the 4C, the forming cavity that is inserted into mould 80 by tag of tubular blank wherein, the workpiece that is inserted into is parked in a position shown in Fig. 8 A, wherein cross section A is positioned at the porch of the frustoconical part of shaping mould surface 80A, and the whole die cavity that is arranged in of frustoconical pipeline section C1.Final diameter D5 has the end that displays from mould, thus with clamp 38B clamping connection mutually.The piston and the housing assembly 42 that are incorporated on trying to stop people from fighting each other spur clamp along a direction, thereby tubular blank is drawn in the mould fully, integrally form the handle portion of transition portion and constant diameter, the expection length of length that transition portion has and bat adapts.Subsequently, workpiece is released from mould fully in opposite direction, and handle portion is removed from mould, and clamp 38B is broken away from advance.To mainly comprise relatively short length according to the made bat of the method for second embodiment of the invention, apply in the process overstress of workpiece to avoid that the diameter parts that reduces is drawn the pressure that is shaped.
Although the present invention is described in conjunction with the preferred embodiment among each figure, should understand like this, promptly can adopt other similar embodiment, perhaps described embodiment be made amendment and add, show with the identical effect of the present invention not from deviating from here.Therefore, the present invention should not be restricted to any single embodiment, but the narration of the claim that foundation is added is explained at bigger width and scope.
Claims (16)
1. method of making metal bat moulding external diameter said method comprising the steps of:
Selection has the initial tubulose metal blank of constant outer diameter, this constant outer diameter is identical with the external diameter that desired finished product bat rod-rod-body divides basically, wherein said initial tubulose metal blank has constant wall thickness, and this wall thickness is identical with the wall thickness that the finished product bat rod-rod-body of expection divides basically; And
Reducing only was the external diameter of a described initial tubulose metal blank part originally, described external diameter reduce by the draw metal blank only part by a shaping mould or only part by in a succession of shaping mould each.
2. method as claimed in claim 1 further comprises step:
Reduce the external diameter of the end portion of described initial tubulose metal blank, its handle portion external diameter with the described finished product bat of expection is close, the end that described initial tubulose metal blank is reduced passes mould, and partly draws tubular workpiece and only partly pass mould to determine the handle portion of final truncated transition section of expectation and constant diameter.
3. as method as described in the claim 2, the wherein said step that reduces end portion comprises carries out pointing to described initial tubulose metal blank.
4. as method as described in the claim 2, the wherein said step that reduces end portion comprises describedly initially carries out rotary swaging to the tubular metal blank.
5. as method as described in the claim 2, wherein said initial tubulose metal blank is an aluminum or aluminum alloy.
6. method of making metal bat moulding external diameter, described method comprises the steps:
Selection has the initial tubulose metal blank of variableization wall thickness, can change wall thickness and start from a preposition; And
Reducing originally only is the external diameter of the part of described initial tubulose metal blank; external diameter reduce by the draw metal blank only part by shaping mould or only part by in a succession of shaping mould each; the drawing of metal blank starts from described preposition; purpose is when reducing external diameter; wall thickness is produced enough increases, make its constant wall thickness consistent basically with the expection of described finished product bat.
7. method as claimed in claim 6, the step that further comprises:
Reduce the external diameter of described initial tubulose metal blank end portion, its handle portion external diameter with the described finished product bat of expection is close, the end portion that described initial tubulose metal blank is reduced is passed mould, and part draw tubular workpiece only part pass mould with the truncated transition section of determining final expectation and the handle portion of constant diameter.
8. as method as described in the claim 7, the wherein said step that reduces end portion comprises carries out pointing to described initial tubulose metal blank.
9. as method as described in the claim 7, the wherein said step that reduces the end portion external diameter comprises carries out rotary swaging to described initial tubulose metal blank.
10. as method as described in the claim 7, wherein said initial tubulose metal blank is an aluminum or aluminum alloy.
11. a method of making metal bat moulding external diameter, described method comprises the steps:
Select initial tubulose metal blank, comprise by forcing the initial blank of constant wall thickness to form wall of variable thickness along tapered longitudinally mould that passes moulding of total length inherence; And
By the draw metal blank only part pass a succession of shaping mould or only part to pass that in a succession of shaping mould each reduces only be the external diameter of a described initial tubulose metal blank part in essence.
12. a method of making metal bat moulding external diameter, described method comprises the steps:
Select initial tubulose metal blank, comprise by drawing the initial blank of constant wall thickness and cross inherent being tapered and the foreshortened length of reciprocal axle is passed shaping mould and formed wall of variable thickness; And
By the draw metal blank only part pass shaping mould or only part pass a succession of shaping mould each to reduce only be the external diameter of a described initial tubulose metal blank part in essence.
13. a method of making metal bat moulding external diameter, described method comprises the steps:
Select initial tubulose metal blank; And
Reducing only is the external diameter of a described tubular metal blank part in essence, method is that the drawing blank only partly passes through each in a succession of shaping mould, stop the drawing campaign in second step by the increase that detects pulling force, pulling force produces when being contacted by the previous profile phase that mould generated when the profile of mould, and continuous, smooth outline thus is shaped.
14. as the method for claim 13, wherein said reducing only is that the step of the part of described initial tubulose metal blank comprises that the pre-determined bit in-migration of the profile by detecting the relative mould of described original metal blank stops the drawing campaign of the first step in essence.
15. a method of making metal bat moulding external diameter, described method comprises the steps:
Select initial tubulose metal blank; And
Reducing only is the external diameter of the part of described initial tubulose metal blank in essence, its method be by detect displacement that described initial tubulose metal blank leaves the profile of mould come the draw metal blank only part pass each of a succession of shaping mould.
16. method as claimed in claim 15, wherein said minimizing only is that the step of the external diameter of a described tubular metal blank part comprises the drawing campaign that stopped for second step in essence, mode is to detect the increase of drawing power, drawing power is configured as continuous, smooth outline thus when the profile of mould produces when being contacted by the formed profile phase of previous mould.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100301927A CN100540168C (en) | 2004-03-22 | 2004-03-22 | Make the method for metal bat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100301927A CN100540168C (en) | 2004-03-22 | 2004-03-22 | Make the method for metal bat |
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| CN1672827A CN1672827A (en) | 2005-09-28 |
| CN100540168C true CN100540168C (en) | 2009-09-16 |
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| CNB2004100301927A Expired - Fee Related CN100540168C (en) | 2004-03-22 | 2004-03-22 | Make the method for metal bat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103192985B (en) * | 2012-01-10 | 2016-01-06 | 江苏希西维轴承有限公司 | Aircraft Novel integral structure pull bar |
| CN102581211B (en) * | 2012-02-02 | 2014-08-06 | 哈尔滨飞机工业集团有限责任公司 | Cold forming method for integral aluminum alloy pull rod of aircraft |
| CN113305161A (en) * | 2021-05-31 | 2021-08-27 | 重庆西重特种铝业有限公司 | Conical pipe drawing production process and drawing equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2095563A (en) * | 1934-10-25 | 1937-10-12 | American Fork & Hoe Co | Method of making golf club shafts |
| US3807213A (en) * | 1971-10-28 | 1974-04-30 | Aluminum Co Of America | Method of making a hollow metal bat |
| US3841130A (en) * | 1973-11-20 | 1974-10-15 | Reynolds Metals Co | Ball bat system |
| US3854316A (en) * | 1971-09-13 | 1974-12-17 | Aluminum Co Of America | Method of making a hollow metal bat with a uniform wall thickness |
| US4089199A (en) * | 1977-03-14 | 1978-05-16 | Reynolds Metals Company | Ball bat and method of making the same |
| US4616500A (en) * | 1985-02-25 | 1986-10-14 | George A. Mitchell Company | Method for producing tubing of varying wall thickness |
| US5074555A (en) * | 1989-04-24 | 1991-12-24 | Sandvik Special Metals Corp. | Tapered wall shaft with reinforced tip |
-
2004
- 2004-03-22 CN CNB2004100301927A patent/CN100540168C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2095563A (en) * | 1934-10-25 | 1937-10-12 | American Fork & Hoe Co | Method of making golf club shafts |
| US3854316A (en) * | 1971-09-13 | 1974-12-17 | Aluminum Co Of America | Method of making a hollow metal bat with a uniform wall thickness |
| US3807213A (en) * | 1971-10-28 | 1974-04-30 | Aluminum Co Of America | Method of making a hollow metal bat |
| US3841130A (en) * | 1973-11-20 | 1974-10-15 | Reynolds Metals Co | Ball bat system |
| US4089199A (en) * | 1977-03-14 | 1978-05-16 | Reynolds Metals Company | Ball bat and method of making the same |
| US4616500A (en) * | 1985-02-25 | 1986-10-14 | George A. Mitchell Company | Method for producing tubing of varying wall thickness |
| US5074555A (en) * | 1989-04-24 | 1991-12-24 | Sandvik Special Metals Corp. | Tapered wall shaft with reinforced tip |
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| CN1672827A (en) | 2005-09-28 |
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