GB2238367A - Motion transfer mechanism - Google Patents

Motion transfer mechanism Download PDF

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Publication number
GB2238367A
GB2238367A GB8926287A GB8926287A GB2238367A GB 2238367 A GB2238367 A GB 2238367A GB 8926287 A GB8926287 A GB 8926287A GB 8926287 A GB8926287 A GB 8926287A GB 2238367 A GB2238367 A GB 2238367A
Authority
GB
United Kingdom
Prior art keywords
driving plate
arm
crank
machine
transfer mechanism
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.)
Granted
Application number
GB8926287A
Other versions
GB2238367B (en
GB8926287D0 (en
Inventor
Shen-Yau Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHUN ZU MACHINERY INDUSTRY CO
Original Assignee
CHUN ZU MACHINERY INDUSTRY CO
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHUN ZU MACHINERY INDUSTRY CO filed Critical CHUN ZU MACHINERY INDUSTRY CO
Priority to GB8926287A priority Critical patent/GB2238367B/en
Publication of GB8926287D0 publication Critical patent/GB8926287D0/en
Priority to CN 90110040 priority patent/CN1052067A/en
Publication of GB2238367A publication Critical patent/GB2238367A/en
Application granted granted Critical
Publication of GB2238367B publication Critical patent/GB2238367B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips
    • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
    • F16H25/14—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation perpendicular to the axis of rotation

Abstract

In a motion transfer mechanism for a machine, particularly a forging machine, wherein a driving plate (4) is mounted rotatably on the machine and has a cam surface, any pair of points of the cam surface, the connecting line of which passes through the rotating axis of the driving plate (4), being spaced apart at a predetermined distance, a pair of roller followers (51, 52) are mounted pivotally on a coupler (5) in association with the cam edge of the driving plate (4), so that when the driving plate (4) is rotated the roller followers (51, 52) slide along the cam edge of the driving plate (4) and one-arm and two- arm crank members (6, 7), pivotally connected with the coupler 5 are rotated so as to activate the output unit (F).

Description

MOTION TRANSFER MECHANISM This invention relates to motion transfer mechanism and more particularly to a motion transfer mechanism with a linkage.
Normally, nut or bolt shaping machines are provided with pull plates which can move workpiece holders from one die to another. A motion transfer mechanism interconnects the device for driving the pull plates and a punch driving device so that the latter can drive the former. However, the complex structure of conventional motion transfer mechanisms obstructs the positive feed of the workpieces to be shaped in these forging machines.
It is therefore the main object of this invention to provide a motion transfer mechanism for a forging machine whereby the workpieces to be forged can be positively fed.
The feature of this invention is to provide a motion transfer mechanism with a linkage and cam assembly.
According to the invention, there is provided a motion transfer mechanism for a machine comprising a single-arm crank member adapted to be pivotally mounted on the machine, a double-arm crank member adapted to be pivotally mounted on the machine and having a first crank arm and a second crank arm, a coupler connected pivotally to the one-arm crank member at one end thereof and to the first crank arm of the two-arm crank member at the other end thereof, a driving plate adapted to be rotatably mounted on the machine and having a cam surface, any pair of points on the cam surface, the connecting line of which passes through the rotating axis of the driving plate, being spaced apart at a predetermined distance, an input unit connected to the driving plate so as to rotate the driving plate, a pair of roller followers mounted pivotally on the coupler in association with the cam surface of the driving plate, the connecting line of the roller followers passing through the rotating axis of the driving plate, and an output unit connected to the second crank arm of the two-arm crank member, whereby when the driving plate is rotated so that the roller followers slide along the cam surface of the driving plate, the single and double-arm crank members are rotated so as to activate the output unit.
In a preferred embodiment, the input unit includes a crank shaft adapted to be journalled on the machine, a slider received slidably in a slot and including a fixed rack, a connecting rod connected pivotally to one end of the crank shaft at one end thereof and to the slider at the other end thereof, a rotating shaft connected securely to the driving plate and including a fixed pinion engaged with the rack of the slider, whereby the actuation of the crank shaft can rotate the driving plate.
Other features and advantages of this invention will become apparent in the following detailed description of a preferred embodiment of this invention, by way of example only, with reference to the accompanying drawings, in which Figure 1 illustrates the interconnection of the workpiece holders and the pull plates of a forging machine using a motion transfer mechanism according to this invention; Figure 2 is a schematic top view illustrating a motion transfer mechanism of the invention fitted to a forging machine; Figure 3 is a schematic side view illustrating the motion transfer mechanism shown in Figure 2; Figure 4 illustrates the cam surface or profile of the driving plate of the motion transfer mechanism of the invention; and Figure 5 illustrates the movement of the linkage of the motion transfer mechanism of the invention.
Referring to Figure 1, there is shown a forging machine which includes a series of workpiece holders (A) each of which has a pair of jaws (Al, A2) constituting a chuck (A3). An upper pull plate (B) can move the upper portions of the workpiece holders (A). A lower pull plate (C) is connected to the upper pull plate (B) by a pivot pin (D) and can move the lower portions of the workpiece holders (A). A coupler (E) connects the pivot pin (D) to a pull rod (F). When the pull rod (F) moves the pull plates (B,C) the workpieces (H) are transmitted from one die (G) to another. The upper ends of the workpiece holders (A) can be rotated by means of sector gears (A4), (see Figure 2), so as to rotate the workpieces (H) held thereon to an angle of 1800 in a horizontal plane, thereby forging two ends of each of the workpieces (H).
Figures 2 and 3 are top and side views showing the motion transfer mechanism of this invention. As illustrated, a plurality of punches (I) are driven by means of a crank shaft (J). The input unit of the motion transfer mechanism includes a connecting rod 1 which is connected at one end thereof to a crank pin (J2) which is disposed on the crank arm (J1) of the crank shaft (J). The other end of the connecting rod 1 is connected rotatably to a slider 2 by a pivot 11.
Four projecting plates 21, 22, 23, 24 define a slot in which the slider 2 is received. A rack 25 is fixed on the slider 2 and is engaged with a pinion 31 which is fixed on a rotating shaft 30. A driving plate 4 is sleeved rigidly on the rotating shaft 30 by a-retainer 34 (see Figure 2) provided with a cam surface. A coupler 5 is connected rotatably to a one-arm crank member 6 at the right end thereof and to the first crank arm 71 of a two-arm crank member 7 at the left end and carries two roller followers 51, 52 which are engaged with the cam surface of the driving plate 4.
The one-arm crank member 6 is mounted pivotally on the machine frame (K) by a pivot (K1), while the two-arm crank member 7 is mounted pivotally on the machine frame (K) by another pivot (K2). The first crank arm 71 of the two-arm crank member 7 is curved so as to prevent the driving plate 4 from colliding therewith.
As shown in Figure 4, any pair of points on the cam surface of the driving plate 4, the connecting line of which passes through the rotating axis C' of the driving plate 4, are spaced apart at a predetermined distance. For example, lines M-M, N-N and 0-0 have the same length. When the driving plate 4 rotates, the roller followers 51, 52 slide smoothly along the cam surface of the driving plate 4. The second crank arm 72 of the two-arm crank member 7 is connected pivotally to the pull rod (F) by a connector (F1).
When the crank shaft (J) is actuated, the driving plate 4 rotates. As shown in Figure 5, the rotation of the driving plate 4 activates the linkage, which consists of the coupler 5, the one-arm crank member 6 and the two-arm crank member 7, so as to positively move the pull rod (F). In this embodiment, because the distance between points b and b' of the first crank arm 71 of the two-arm crank member 7 is equal to that between points d and d' of the one-arm crank member 6, when the driving plate 4 rotates to a certain angle, the one-arm crank member 6 and the two-arm crank member 7 rotate to the same angle.
Because of the incorporation of the linkage with the cam, smooth movement of the linkage and positive feed of the workpieces (H) can be obtained. It will be understood that the cam edge or surface of the driving plate 4 is designed according to the process steps required to forge the workpieces (H).

Claims (4)

1. A motion transfer mechanism for a machine comprising a single-arm crank member adapted to be pivotally mounted on the machine, a double-arm crank member adapted to be pivotally mounted on the machine and having a first crank arm and a second crank arm, a coupler connected pivotally to the one-arm crank member at one end thereof and to the first crank arm of the two-arm crank member at the other end thereof, a driving plate adapted to be rotatably mounted on the machine and having a cam surface, any pair of points on the cam surface, the connecting line of which passes through the rotating axis of the driving plate, being spaced apart at a predetermined distance, an input unit connected to the driving plate so as to rotate the driving plate, a pair of roller followers mounted pivotally on the coupler in association with the cam surface of the driving plate, the connecting line of the roller followers passing through the rotating axis of the driving plate, and an output unit connected to the second crank arm of the two-arm crank member, whereby when the driving plate is rotated so that the roller followers slide along the cam surface of the driving plate, the single and double-arm crank members are rotated so as to activate the output unit.
2. A motion transfer mechanism as claimed in Claim 1, wherein the input unit includes a crank shaft adapted to be journalled on the machine, a slider received slidably in a slot and including a fixed rack, a connecting rod connected pivotally to one end of the crank shaft at one end thereof and to the slider at the other end thereof, a rotating shaft connected securely to the driving plate and including a fixed pinion engaged with the rack of the slider, whereby the actuation of the crank shaft can rotate the driving plate.
3. A motion transfer mechanism substantially as described hereinbefore with reference to the accompanying drawings.
4. A machine when fitted with a motion transfer mechanism as claimed in any of Claims 1-3.
GB8926287A 1989-11-21 1989-11-21 Motion transfer mechanism Expired - Fee Related GB2238367B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8926287A GB2238367B (en) 1989-11-21 1989-11-21 Motion transfer mechanism
CN 90110040 CN1052067A (en) 1989-11-21 1990-11-21 The reciprocating drive mechanism of forging machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8926287A GB2238367B (en) 1989-11-21 1989-11-21 Motion transfer mechanism

Publications (3)

Publication Number Publication Date
GB8926287D0 GB8926287D0 (en) 1990-01-10
GB2238367A true GB2238367A (en) 1991-05-29
GB2238367B GB2238367B (en) 1993-10-06

Family

ID=10666656

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8926287A Expired - Fee Related GB2238367B (en) 1989-11-21 1989-11-21 Motion transfer mechanism

Country Status (2)

Country Link
CN (1) CN1052067A (en)
GB (1) GB2238367B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102151892A (en) * 2011-03-22 2011-08-17 无锡市方泰钢板网有限公司 Transmission mechanism of cutter rest transverse slide block of steel plate net punching and shearing machine
CN108421944B (en) * 2018-03-19 2023-12-29 温州市翔潮汽车零部件有限公司 Semi-hollow cold header
CN112845855A (en) * 2021-02-02 2021-05-28 合肥正特机械有限公司 A processingequipment for staple bolt punching press integrated into one piece

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1034217A (en) * 1963-09-30 1966-06-29 Siemens Ag Step-by-step transport mechanism for flat articles such as perforated or printed cards
GB1486038A (en) * 1974-11-11 1977-09-14 Gillette Co Dry shavers
GB2150109A (en) * 1983-11-16 1985-06-26 Emhart Ind Take-out mechanism for a glassware forming machine
GB2176740A (en) * 1985-06-14 1987-01-07 Sankyo Mfg Press machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1034217A (en) * 1963-09-30 1966-06-29 Siemens Ag Step-by-step transport mechanism for flat articles such as perforated or printed cards
GB1486038A (en) * 1974-11-11 1977-09-14 Gillette Co Dry shavers
GB2150109A (en) * 1983-11-16 1985-06-26 Emhart Ind Take-out mechanism for a glassware forming machine
GB2176740A (en) * 1985-06-14 1987-01-07 Sankyo Mfg Press machine

Also Published As

Publication number Publication date
GB2238367B (en) 1993-10-06
CN1052067A (en) 1991-06-12
GB8926287D0 (en) 1990-01-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940106