CA2185218A1 - Improved lightweight ram for bodymaker - Google Patents
Improved lightweight ram for bodymakerInfo
- Publication number
- CA2185218A1 CA2185218A1 CA002185218A CA2185218A CA2185218A1 CA 2185218 A1 CA2185218 A1 CA 2185218A1 CA 002185218 A CA002185218 A CA 002185218A CA 2185218 A CA2185218 A CA 2185218A CA 2185218 A1 CA2185218 A1 CA 2185218A1
- Authority
- CA
- Canada
- Prior art keywords
- ram
- nose piece
- piece
- tube section
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/21—Deep-drawing without fixing the border of the blank
Abstract
A ram (10) that is utilized in high speed apparatus for forming elongated one piece metal can bodies from shallow cups is constructed by metallurgically bonding a nose piece (12) to a body (15), the body constructed from a single integral piece having an elongated thin walled tube section (11) with a front end (19) and a tail piece section (13) for connection to a drive means.
Description
2 1 852 1 ~
~ WO 95124283 ~ ~,I/U~ ~ 1559 t IMPROVED LIGHTWEIGHT RAM FOR BODYMAK~R
n~ of the Inv~ntir,n The inYention relates to the Cu~ iull of a ram that is utilized in high speed apparatus for forming elongated one piece metal cail bodies from relatively shaUow cups, and more ~ir~lly relates to an improved lightweight ram with increased integrit,Y against stresses produced during the operation of the bodymaicer.
The main section or body of a so-called two piece metal container or can of the type ver,Y often used for bc~ ,t_;. includes an elongated cylindrical sidewall, an integral bottom and an open top. Such bodies are often formed in drawing and ironing machines of the type describe~i in U.S. Pat.
No. 3,704,619 issued Dec. 5, 1972 to E. ri '' for Redraw r~ I ,ni. i. .
Positioning M~r~ for Cup-shaped Article Formers such as MetaUic Can Body Formers and the Like, U.S. Pat. No. 3,735,629 issued May 29, 1973 to E. r~..u,lurr entitled Apparatus for Forming One Piece Metailic Can Bodies, aild U.S. Pat. No. 4,530,228 issued ~ul. 23, 1985 to W. Snyder and D.
Dettmer for Apparatus for Producing Seamless Container Bodies. The apparatus described in the aforesaid patents produce can bodies from blanks in the form of relatively shallow cups, by having a l~il.l. ' ram drive each cup through a die pack which is a series of ringlike die elements having openings that are graduated. Each blank passes through the largest opening first, and each subsequent opening that the blank is driven through is slightly smaUer than tie preceding opening through which the blank has been driven.
A ,~ punch mounted to the raun at the front thereof engages each cup to drive it through the die pack. The rear end of the ram is connected to the drive means that ~iyl. the ram along its horizontaUy positioned 1~ ' acis through a forward worlcing stroke followed by a rearward return strolce.
wo ss/242s3 ~ J .,s~ols~s Cu~ y, rams are III~LII~.l.~l_~UlC:d from a single piece of barstock.
This imposes seYere limitations on readily machining the interior of the hollow elongaoed main center section of the ram. This problem arises because the a~al passages at both ends of the ram are limited in diameoer, being less tha~i the center section diameoer t~iat will s~ enable the cenoer section to provide the required mechanical strength (without having =sive wall thickness). Thus, in the prior ait, wail thickness of the main cenoer section was unusually ~ greater than necessaiy to meet strength lr~ so that the rams were, ~ heavy.
In U.S. Pat. No. 5,~08,435 a ram is provided constructed as a weldment in which there is an elongated tube, a tail piece mrt~ r~ir~ily bonded to one end of the tube and a nose piece . ~ ly bonded to the other end of the tube. While effective, this ram could experience excessive stress levels in the weld zone, l/~ti~ uly where the tail piece is bonded to thetube, with the effects of these stresses being magnified when the welds have f. ~ ,, c S~mm~y of thR Invention To produce a relatively lightweight ram tbe instant invention provides a unitary structure that is construcoed by I~ ly bondimg a nose piece to a body, the body cnnctnlr~l ri from a simgle inoegral pie~e having an elongated thin walled tube section with a front end and a tail piece section adapoed for commection to a drive means that 'r _ ' the ram along its 1. ..
axis. Preferably the front end of the body and the nose piece have u~
portions and are assembled by shrink fitting together. Bonding is carried out by welding which achieves attachment strength that is for all practical purposesequal to the strength found in a ram ~ ' from a single piece of barstock. Preferably, tube wall thickness is selecoed so that is does not exceedsubstantially that thickness required to provide sufficient strength for the job ~ WO95/24283 2 1 852 ~ 8 P~ 'C1559 that the ram is required to perform thereby 1~ weight. The reduction in weight achieved by welding two pieces together to form the ram is significant and results in increased can production because an increase in the cyclic rate of the machine is permitted.
Accordingly, the primary object of the instant invention is to provide a relatively li~,hi..~ .. ram for a can body maker.
Another object is to provide a ram of this type tbat is CUll:~ilUU~l of two elements ~ ly bonded together to form a unitary structure.
Another object is to provide a ram of this type in which the two dements are also shrink fit together.
Another object is to reduce the level of bending stress at the weld joint, supported by the overlap shrink fit area.
StiU another object is to provide a ram of this type that is, by welding techniques.
A further object is to provide a ram of this type in which the main elongated center section thereof has a length to waLI thickness ratio greater than one hundred.
A still further object is to provide a ram of this type which permits increased machine speed.
These objects as well as other oyects of this invention shaU become readily apparent after reading the following description of the accu~
drawings in which:
Rri~f D~rrultinn of the Drawinpc FIG. 1 is a partially sectioned side elevation of a 'i~ ram , "r.~".. h .1 in accordance with teachings of the instant invention.
FIG. 2 is a par~ally sectioned side elevation of the body of the 'i"' -.t,lll ram.
wo 95/24283 ~ 55Y
FIG. 3 is an end view of the body of the lightweight ram looking in the direction of arrows 3-3 of FIG. 2.
r'IG. 4 is a partially sectioned side elevation of the nose piece of the i,,' .~' ram.
FrG. 5 is an end view of the nose piece of the l.~;hh.. ~' ram looking in the direction of arrows 5-5 of FIG. 4.
Now referring to the Figures.
~Pf~ilP,l Description of the Invention Ram lO is constmcted by utilizing weld 14 to mPt~ lr~ir~lly bond nose piece 12 to the front end 19 of thin walled tubular center section 11 of body 15. Body 15 is cr nctnlrrP~l of a single integral piece (i.e. single piece having an elongatPd thin-waUed tube section 11 witb a front end 19 and a tail piece section 13. The body is preferably w...,uu~,~ by drilling out rnaterial from a solid bar or tube to form the thin walled tube section 11 and integral tail piece section 13. Ad. ~ '~, by ~,UII~UU~,LiUII of body 15 having an integral tube section 11 and tail piece section 13, a weld or joint between these two sections is eliminated at a point on the ram 10 where increased stresses are exhibited during the bodymaker operation, thus increasing the structural integrity of the ram as there is no joint to break.
Typically, main section 11 has a length L that is l,! r ' ' ~.y 41 inches or less and is at least one hundred times greater than the wall thicknessT of tube section 11. In a practical - - ~;- tube section 11 has an outer diameter Of -rr ' ' ~ 2.5 inches and an inner dia}neter of llrL 'y 2 inches. This results in a wall thickness of 1/4 inch which is a reduction of as much as 64% of the 5/8 inch to 11/16 inch wall thickness of the central section in prior art rams that are machined from a single piece of bar stock. When the wall thickness of tube section 11 is 1/8 inch, this an 82% reduction from the i 2~852 W095/242ti3 i 8 r~ b-ssg s 11/16 inch wall thickness found in the prior art. Preferably the tube section 11has an axial passage that is of a diameter which is greater than 75 % of the outer diameter of the tube section 11.
Suitable axial lengths for nose piece 12 and tail piece section 13 of the body are d~ y 6.6 inches and 1.7 inches, ~ .,lg. The diarneters of the axial passages 16, 17 for the respective nose and tail pieces are 'l' '!' 3/4 of an inch. The diarneter of the axial passage of the tube section 11 is preferably at least two times the diameter of the axial passages for both the nose piece 12 and the tail piece sechon 13.
Nose piece 12 is adapted to mount and operatively position a punch nose and sleeve (not shown) with the latter ~u~ .dillg and being closely fitted to cylindrical outer surface portion 18 of nose piece 12. Punch elements can be secured in place by retainer screw having extemal threads that mate with intemal threads at the front of passage 16. A punch nose can be secured to the nose piece 12 depicted in Figure I by a punch nose retamer screw.
Tail piece section 13 is adapted to be connected to a drive means (not shown) for ~ ram 10 along its 1.~ I axis 25. Suitable drive means for ram 10 as well as other details of can body fomming apparatus are described in the aforesaid U.S. Pat. Nos. 3,704,619, 3,735,629 and/or 4,530,228. The teachings of these three patents are; ~ herein by reference.
Welding that forms weld 14 and m~t~ bonds dements 12 and 15 achieves attachment strength that is, for practical purposes, equal to havinga unit of single piece .,ol~ U.,L~--. Preferably, in order to reduce the level of stress at weld 14, the front end 19 of the tube section 11 and the nose piece 12are co..~.lu~ so that a portion of one will overlap and closely fit over a portion of the other in order that they may be shrink fit together, i.e. they are assembled by heating the overlappimg portion of front end 19 to expand it and i ~ 2185218 3 P~~ 559 snugly fit it onto the underlying portion 20. The oYerlapping portions are at least 3/4 inches preferably I 1/4 to I 1/2 inches to achieve a good shrink fit.
Suitable shrink fitting is carried out by heating the body 15 to 400-45~P F
followed by inserting the underlying portion 20 of the noæ piece 12 into the u.. ' ,~ ~ portion of the front end 19 of the body 15. Shrink fitting the nose piece 12 and body 15 together helps keep the stresses away from the weld during the bodymaker operation, i.e. by distributing all annular stress levels caused by bending to the weld joint area, thus increasing the integrity of the ram 10. The weld 14 can be formed by a ~u,..~..t u~l gas-shielded tig-arc weld. Test specimens were pull tested at 100,0ûO lbs. tension without failure at the weld joint.
Because the wall of tubular main section 11 is essentially no thicker than re~uired, ram lû is relatively light~veight so that inertia forces are reduced. Comparing ram 10 with ~UI~ UII~Ily drilled rams of one piece w..~L~u~,~u,~, reductions in weight of up to about 45% are obtainable. Because of this foundation vibration is lessened and machine wear slows down " thereby permitting machine speed to be increased without hannful effects. Ram 10 is also ' , ' ' with rams of ~.UII~ iOllal one piece f' '' '`I ' I" I ;""
Elements 12 and 15 are rnnct~.ftl A of aUoy steel, with 9310 VAR
being suitable for this purpose. After elements 12 and 15 are a~ iaUy aligned, shrink fit and then bonded together by weld 14, the assembly is subjected to stress relieving, carburi~ing and finish machining operations. As an alternative, elements 12 and 15 before they are assembled, and after applying wdd 14, are stress relieved only at locali~ed areas adjacent the weld 14.
Although the present invention has been described in relation to particular ~ ~ ' thereof, many other variations and 1 ~ and other uses will be~ome apparent to those skiUed in the art. It is preferred, '~; 2185218 ~ PCr/USg5~01559 ~ WO 9~/24283 therefore, that the present invention be limited not by the specific disclosure herein, but only by the appended claims.
~ WO 95124283 ~ ~,I/U~ ~ 1559 t IMPROVED LIGHTWEIGHT RAM FOR BODYMAK~R
n~ of the Inv~ntir,n The inYention relates to the Cu~ iull of a ram that is utilized in high speed apparatus for forming elongated one piece metal cail bodies from relatively shaUow cups, and more ~ir~lly relates to an improved lightweight ram with increased integrit,Y against stresses produced during the operation of the bodymaicer.
The main section or body of a so-called two piece metal container or can of the type ver,Y often used for bc~ ,t_;. includes an elongated cylindrical sidewall, an integral bottom and an open top. Such bodies are often formed in drawing and ironing machines of the type describe~i in U.S. Pat.
No. 3,704,619 issued Dec. 5, 1972 to E. ri '' for Redraw r~ I ,ni. i. .
Positioning M~r~ for Cup-shaped Article Formers such as MetaUic Can Body Formers and the Like, U.S. Pat. No. 3,735,629 issued May 29, 1973 to E. r~..u,lurr entitled Apparatus for Forming One Piece Metailic Can Bodies, aild U.S. Pat. No. 4,530,228 issued ~ul. 23, 1985 to W. Snyder and D.
Dettmer for Apparatus for Producing Seamless Container Bodies. The apparatus described in the aforesaid patents produce can bodies from blanks in the form of relatively shallow cups, by having a l~il.l. ' ram drive each cup through a die pack which is a series of ringlike die elements having openings that are graduated. Each blank passes through the largest opening first, and each subsequent opening that the blank is driven through is slightly smaUer than tie preceding opening through which the blank has been driven.
A ,~ punch mounted to the raun at the front thereof engages each cup to drive it through the die pack. The rear end of the ram is connected to the drive means that ~iyl. the ram along its horizontaUy positioned 1~ ' acis through a forward worlcing stroke followed by a rearward return strolce.
wo ss/242s3 ~ J .,s~ols~s Cu~ y, rams are III~LII~.l.~l_~UlC:d from a single piece of barstock.
This imposes seYere limitations on readily machining the interior of the hollow elongaoed main center section of the ram. This problem arises because the a~al passages at both ends of the ram are limited in diameoer, being less tha~i the center section diameoer t~iat will s~ enable the cenoer section to provide the required mechanical strength (without having =sive wall thickness). Thus, in the prior ait, wail thickness of the main cenoer section was unusually ~ greater than necessaiy to meet strength lr~ so that the rams were, ~ heavy.
In U.S. Pat. No. 5,~08,435 a ram is provided constructed as a weldment in which there is an elongated tube, a tail piece mrt~ r~ir~ily bonded to one end of the tube and a nose piece . ~ ly bonded to the other end of the tube. While effective, this ram could experience excessive stress levels in the weld zone, l/~ti~ uly where the tail piece is bonded to thetube, with the effects of these stresses being magnified when the welds have f. ~ ,, c S~mm~y of thR Invention To produce a relatively lightweight ram tbe instant invention provides a unitary structure that is construcoed by I~ ly bondimg a nose piece to a body, the body cnnctnlr~l ri from a simgle inoegral pie~e having an elongated thin walled tube section with a front end and a tail piece section adapoed for commection to a drive means that 'r _ ' the ram along its 1. ..
axis. Preferably the front end of the body and the nose piece have u~
portions and are assembled by shrink fitting together. Bonding is carried out by welding which achieves attachment strength that is for all practical purposesequal to the strength found in a ram ~ ' from a single piece of barstock. Preferably, tube wall thickness is selecoed so that is does not exceedsubstantially that thickness required to provide sufficient strength for the job ~ WO95/24283 2 1 852 ~ 8 P~ 'C1559 that the ram is required to perform thereby 1~ weight. The reduction in weight achieved by welding two pieces together to form the ram is significant and results in increased can production because an increase in the cyclic rate of the machine is permitted.
Accordingly, the primary object of the instant invention is to provide a relatively li~,hi..~ .. ram for a can body maker.
Another object is to provide a ram of this type tbat is CUll:~ilUU~l of two elements ~ ly bonded together to form a unitary structure.
Another object is to provide a ram of this type in which the two dements are also shrink fit together.
Another object is to reduce the level of bending stress at the weld joint, supported by the overlap shrink fit area.
StiU another object is to provide a ram of this type that is, by welding techniques.
A further object is to provide a ram of this type in which the main elongated center section thereof has a length to waLI thickness ratio greater than one hundred.
A still further object is to provide a ram of this type which permits increased machine speed.
These objects as well as other oyects of this invention shaU become readily apparent after reading the following description of the accu~
drawings in which:
Rri~f D~rrultinn of the Drawinpc FIG. 1 is a partially sectioned side elevation of a 'i~ ram , "r.~".. h .1 in accordance with teachings of the instant invention.
FIG. 2 is a par~ally sectioned side elevation of the body of the 'i"' -.t,lll ram.
wo 95/24283 ~ 55Y
FIG. 3 is an end view of the body of the lightweight ram looking in the direction of arrows 3-3 of FIG. 2.
r'IG. 4 is a partially sectioned side elevation of the nose piece of the i,,' .~' ram.
FrG. 5 is an end view of the nose piece of the l.~;hh.. ~' ram looking in the direction of arrows 5-5 of FIG. 4.
Now referring to the Figures.
~Pf~ilP,l Description of the Invention Ram lO is constmcted by utilizing weld 14 to mPt~ lr~ir~lly bond nose piece 12 to the front end 19 of thin walled tubular center section 11 of body 15. Body 15 is cr nctnlrrP~l of a single integral piece (i.e. single piece having an elongatPd thin-waUed tube section 11 witb a front end 19 and a tail piece section 13. The body is preferably w...,uu~,~ by drilling out rnaterial from a solid bar or tube to form the thin walled tube section 11 and integral tail piece section 13. Ad. ~ '~, by ~,UII~UU~,LiUII of body 15 having an integral tube section 11 and tail piece section 13, a weld or joint between these two sections is eliminated at a point on the ram 10 where increased stresses are exhibited during the bodymaker operation, thus increasing the structural integrity of the ram as there is no joint to break.
Typically, main section 11 has a length L that is l,! r ' ' ~.y 41 inches or less and is at least one hundred times greater than the wall thicknessT of tube section 11. In a practical - - ~;- tube section 11 has an outer diameter Of -rr ' ' ~ 2.5 inches and an inner dia}neter of llrL 'y 2 inches. This results in a wall thickness of 1/4 inch which is a reduction of as much as 64% of the 5/8 inch to 11/16 inch wall thickness of the central section in prior art rams that are machined from a single piece of bar stock. When the wall thickness of tube section 11 is 1/8 inch, this an 82% reduction from the i 2~852 W095/242ti3 i 8 r~ b-ssg s 11/16 inch wall thickness found in the prior art. Preferably the tube section 11has an axial passage that is of a diameter which is greater than 75 % of the outer diameter of the tube section 11.
Suitable axial lengths for nose piece 12 and tail piece section 13 of the body are d~ y 6.6 inches and 1.7 inches, ~ .,lg. The diarneters of the axial passages 16, 17 for the respective nose and tail pieces are 'l' '!' 3/4 of an inch. The diarneter of the axial passage of the tube section 11 is preferably at least two times the diameter of the axial passages for both the nose piece 12 and the tail piece sechon 13.
Nose piece 12 is adapted to mount and operatively position a punch nose and sleeve (not shown) with the latter ~u~ .dillg and being closely fitted to cylindrical outer surface portion 18 of nose piece 12. Punch elements can be secured in place by retainer screw having extemal threads that mate with intemal threads at the front of passage 16. A punch nose can be secured to the nose piece 12 depicted in Figure I by a punch nose retamer screw.
Tail piece section 13 is adapted to be connected to a drive means (not shown) for ~ ram 10 along its 1.~ I axis 25. Suitable drive means for ram 10 as well as other details of can body fomming apparatus are described in the aforesaid U.S. Pat. Nos. 3,704,619, 3,735,629 and/or 4,530,228. The teachings of these three patents are; ~ herein by reference.
Welding that forms weld 14 and m~t~ bonds dements 12 and 15 achieves attachment strength that is, for practical purposes, equal to havinga unit of single piece .,ol~ U.,L~--. Preferably, in order to reduce the level of stress at weld 14, the front end 19 of the tube section 11 and the nose piece 12are co..~.lu~ so that a portion of one will overlap and closely fit over a portion of the other in order that they may be shrink fit together, i.e. they are assembled by heating the overlappimg portion of front end 19 to expand it and i ~ 2185218 3 P~~ 559 snugly fit it onto the underlying portion 20. The oYerlapping portions are at least 3/4 inches preferably I 1/4 to I 1/2 inches to achieve a good shrink fit.
Suitable shrink fitting is carried out by heating the body 15 to 400-45~P F
followed by inserting the underlying portion 20 of the noæ piece 12 into the u.. ' ,~ ~ portion of the front end 19 of the body 15. Shrink fitting the nose piece 12 and body 15 together helps keep the stresses away from the weld during the bodymaker operation, i.e. by distributing all annular stress levels caused by bending to the weld joint area, thus increasing the integrity of the ram 10. The weld 14 can be formed by a ~u,..~..t u~l gas-shielded tig-arc weld. Test specimens were pull tested at 100,0ûO lbs. tension without failure at the weld joint.
Because the wall of tubular main section 11 is essentially no thicker than re~uired, ram lû is relatively light~veight so that inertia forces are reduced. Comparing ram 10 with ~UI~ UII~Ily drilled rams of one piece w..~L~u~,~u,~, reductions in weight of up to about 45% are obtainable. Because of this foundation vibration is lessened and machine wear slows down " thereby permitting machine speed to be increased without hannful effects. Ram 10 is also ' , ' ' with rams of ~.UII~ iOllal one piece f' '' '`I ' I" I ;""
Elements 12 and 15 are rnnct~.ftl A of aUoy steel, with 9310 VAR
being suitable for this purpose. After elements 12 and 15 are a~ iaUy aligned, shrink fit and then bonded together by weld 14, the assembly is subjected to stress relieving, carburi~ing and finish machining operations. As an alternative, elements 12 and 15 before they are assembled, and after applying wdd 14, are stress relieved only at locali~ed areas adjacent the weld 14.
Although the present invention has been described in relation to particular ~ ~ ' thereof, many other variations and 1 ~ and other uses will be~ome apparent to those skiUed in the art. It is preferred, '~; 2185218 ~ PCr/USg5~01559 ~ WO 9~/24283 therefore, that the present invention be limited not by the specific disclosure herein, but only by the appended claims.
Claims (20)
1. A lightweight ram for high speed apparatus that produces relatively elongated can bodies by driving relatively shallow cups through a ring type die means, said ram including:
a nose piece constructed to mount and operatively position a punch on said ram;
a body constructed from a single integral piece having an elongated thin-walled tube section with a front end and tail piece section adapted for connection to a drive means that reciprocates the ram along its longitudinal axis;
said nose piece, said tube section and said tail piece section being in axial alignment, with said tube section interposed between said nose piece and said tail piece section;
a metallurgical bond fixedly securing said nose piece to said tube section at said front end and extending forward thereof.
a nose piece constructed to mount and operatively position a punch on said ram;
a body constructed from a single integral piece having an elongated thin-walled tube section with a front end and tail piece section adapted for connection to a drive means that reciprocates the ram along its longitudinal axis;
said nose piece, said tube section and said tail piece section being in axial alignment, with said tube section interposed between said nose piece and said tail piece section;
a metallurgical bond fixedly securing said nose piece to said tube section at said front end and extending forward thereof.
2. Ram of Claim 1 wherein the body is constructed by drilling out material to form the thin-walled tube section and tail piece section.
3. Ram of Claim 2 wherein the front end of the tube section of the body and the nose piece are constructed so that a portion of one will overlap a portion of the other when fixedly securing the nose piece to the front end of said tube section.
4. Ram of Claim 3 wherein the portion of overlap is at least 3/4 inch wide.
5. Ram of Claim 4 wherein the front end and the nose piece are first assembled by heating the overlapping portion to expand it and shrink fit the front end and nose piece together.
6. Ram of Claim 5 wherein the portion of the front end overlaps the portion of the nose piece.
7. Ram as defined by Claim 1 in which a weld metallurgically bonds the tube section to the nose piece.
8. Ram as defined by Claim 1 in which the body and the nose piece are constructed of alloy steel.
9. Ram as defined by Claim 1 in which the tube has a length that is greater than one hundred times its wall thickness.
10. Ram as defined by Claim 9 wherein there are aligned axial passages through the nose piece, the tube section and the tail piece section, with the axial passage of the tube section having a diameter of at least two times the diameter of the axial passages for both the nose piece and the tail piece section.
11. Ram as defined by Claim 9 wherein the tube section has an axial passage that is of a diameter which is greater than 75% of the outer diameter of the tube section.
12. A method for constructing a lightweight steel ram for high speed apparatus that produces relatively elongated can bodies by driving relatively shallow cups through a ring type die means, said method including the steps of:
constructing a nose piece adapted to mount and operatively position a punch of the ram and constructing a body from a single integral piece having an elongated thin walled tube section and a tail piece section adapted for connection to a drive means for reciprocating the ram along its longitudinal axis;
metallurgically bonding the nose piece to the front end of the elongated thin walled tube section to form a ram in which the nose piece, the tube section and the tail piece section are axially aligned.
constructing a nose piece adapted to mount and operatively position a punch of the ram and constructing a body from a single integral piece having an elongated thin walled tube section and a tail piece section adapted for connection to a drive means for reciprocating the ram along its longitudinal axis;
metallurgically bonding the nose piece to the front end of the elongated thin walled tube section to form a ram in which the nose piece, the tube section and the tail piece section are axially aligned.
13. A method for constructing a ram as set forth in Claim 12 in which the metallurgical bonding is the result of welding.
14. A method for constructing a ram as set forth in Claim 12 in which, following the metallurgical bonding steps, the ram is subjected to stressrelieving and carburizing.
15. A method for constructing a ram as set forth in Claim 12 also including the steps of:
heat treating the nose piece and the body prior to bonding them together; and stress relieving the assembled nose piece and body only at localized areas adjacent the interface between the body and the nose piece.
heat treating the nose piece and the body prior to bonding them together; and stress relieving the assembled nose piece and body only at localized areas adjacent the interface between the body and the nose piece.
16. Method of Claim 12 wherein the body is constructed by drilling out material to form the thin-walled tube section and tail piece section.
17. Method of Claim 16 wherein the front end of the tube section of the body and the nose piece are constructed so that a portion of one will overlap a portion of the other when securing the nose piece to the front end of said tube section.
18. Method of Claim 17 wherein the portion of overlap is at least 3/4 inch wide.
19. Method of Claim 18 wherein the front end and the nose piece are first assembled by heating the overlapping portion to expand it and shrink fit the front end and nose piece together.
20. Method of Claim 18 wherein the portion of the front end overlaps the portion of the nose piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002185218A CA2185218A1 (en) | 1994-03-10 | 1995-02-08 | Improved lightweight ram for bodymaker |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/212,036 | 1994-03-10 | ||
| CA002185218A CA2185218A1 (en) | 1994-03-10 | 1995-02-08 | Improved lightweight ram for bodymaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2185218A1 true CA2185218A1 (en) | 1995-09-14 |
Family
ID=4158881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002185218A Abandoned CA2185218A1 (en) | 1994-03-10 | 1995-02-08 | Improved lightweight ram for bodymaker |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2185218A1 (en) |
-
1995
- 1995-02-08 CA CA002185218A patent/CA2185218A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20060208 |