CN1304138C - Special hydraulic mould stand - Google Patents

Special hydraulic mould stand Download PDF

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Publication number
CN1304138C
CN1304138C CNB2004100613986A CN200410061398A CN1304138C CN 1304138 C CN1304138 C CN 1304138C CN B2004100613986 A CNB2004100613986 A CN B2004100613986A CN 200410061398 A CN200410061398 A CN 200410061398A CN 1304138 C CN1304138 C CN 1304138C
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CN
China
Prior art keywords
cylinder
mould
plate
hydraulic
mould bases
Prior art date
Application number
CNB2004100613986A
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Chinese (zh)
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CN1644267A (en
Inventor
夏巨谌
胡国安
王新云
李大才
Original Assignee
华中科技大学
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Application filed by 华中科技大学 filed Critical 华中科技大学
Priority to CNB2004100613986A priority Critical patent/CN1304138C/en
Publication of CN1644267A publication Critical patent/CN1644267A/en
Application granted granted Critical
Publication of CN1304138C publication Critical patent/CN1304138C/en

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Abstract

The present invention relates to a special hydraulic mould frame, which belongs to a hydraulic device for forging forming technologies, and solves problems existed in the existing core forging hydraulic mould frame for cone gears. The present invention is composed of a mould frame and a piston oil cylinder, wherein the mould frame comprises an upper mould plate, four groups of guide poles and guide sleeves, an upper female mould shim plate, a lower female mould shim plate, a lower punch seat, an upper female mould fixing ring, an upper punch and a lower punch; the piston oil cylinder comprises a cylinder bottom, a cylinder body, an annular piston in the cylinder body, and a cylinder cap used as the guide spacing ring of a lower female mould; four groups of small push rods and cylindrical urethane rubber bars which are symmetrically distributed are arranged between the upper female mould fixing ring and the upper female mould shim plate, the cylinder bottom is directly used as a lower mould plate, two groups of left and right spacing blocks are fixed between the lower mould plate and the upper mould plate, and the lower punch is supported on the lower punch seat tightly fixed on the cylinder bottom; the present invention has the advantages of simple structure, easy manufacture and installation, easy use, good motion stability during operation and long service life, and is arranged on single motion hydraulic presses for use.

Description

The dedicated hydraulic mould bases
Technical field
The invention belongs to the hydraulic means of forging forming technology.
Background technology
Yang Shenhua, refined clear, the Xu Chenglin of hat, " research of car differential mechanism planet and the cold block forging of axle shaft gear ", forging technology, 2004, Vol.29, the cold block forging single action of the conical gear hydraulic pressure die-shelf that No.1:9-12 proposes, form by mould bases and piston oil-cylinder two parts, mould bases comprises cope match-plate pattern, lower bolster, four groups of guide pillar guide pin bushing, upper cavity die backing plate, lower cavity die backing plate, low punch seat, upper cavity die retainer plates that are symmetrically distributed, lower cavity die guide and limit circle, last knock-pin, following knock-pin; Piston oil-cylinder comprises annular piston in the cylinder bottom, cylinder body, cylinder body, as the cylinder cap of lower cavity die guide and limit circle, its cylinder bottom, cylinder body are independent overall structures, make the height of mould bases higher because of having increased lower bolster, the draw ratio that is directed at guide pillar increases and easy deformation and then influence guiding accuracy; When the die socket of this mould bases moves up and down with annular piston, rely on the annular element guiding, and the annular element short transverse is small-sized, guiding accuracy and poor stability.
Hu Yamin, " finish forge mould handbook ", Beijing, China Machine Press, the 2002 cold block forging hydraulic pressure die-shelfs of conical gear that propose, its hydraulic cylinder also is independent overall structure, and be fixed in the circular pit of lower bolster, its advantage is the total height that has reduced mould bases, but cylinder bottom bears the effect of very big die forging power and produces distortion during die forging, will influence the kinematic accuracy and the stationarity of mould bases; In addition, offer relatively difficulty of two heavy caliber oilholes on this structure.
Hyoji Yoshimuya, Katsuhisa Tanka, Precsion forging of aluminum andsteel, the conical gear block forging hydraulic pressure die-shelf that Journal of Materials processing Technolgy 98 (2000) 196-204 propose, the outer profile size of recessed die holder and last, lower bolster is identical, for the lower cavity die that guarantees combining structure moves upward fast, between die socket and lower bolster, be provided with four groups of piston-cylinder jacking mechanisms, cylinder bottom links to each other with the nitrogen accumulator by pipeline, and between at the bottom of the cylinder cylindrical spring is housed below the piston.Its shortcoming is a complex structure, and is bulky, and the manufacturing cost height uses maintenance difficult.
Summary of the invention
The present invention proposes a kind of dedicated hydraulic mould bases, is used for the conical gear flashed cold forging, overcomes the existing existing problem of several conical gear block forging hydraulic pressure die-shelfs.
Dedicated hydraulic mould bases of the present invention, be used for the conical gear flashed cold forging, form by mould bases and piston oil-cylinder two parts, mould bases comprises cope match-plate pattern, four groups of guide pillars and bushes, upper cavity die backing plate, lower cavity die backing plate, low punch seat, upper cavity die retainer plates that are symmetrically distributed, lower cavity die guide and limit circle, upper punch, low punch; Piston oil-cylinder comprises annular piston in the cylinder bottom, cylinder body, cylinder body, as the cylinder cap of lower cavity die guide and limit circle, it is characterized in that:
(1) four groups of little push rod and cylindrical polyurethane rubber rods that are symmetrically distributed is housed between described upper cavity die retainer plate and the upper cavity die backing plate;
(2) described cylinder bottom is directly as lower bolster, is fixed with left and right two groups of limited blocks between itself and the cope match-plate pattern;
(3) low punch is bearing on the low punch seat, and the low punch seat places in the middle circular pit of cylinder bottom and tightens up with cylinder bottom.
Described dedicated hydraulic mould bases, it is further characterized in that: the top of described annular piston and recessed die holder tighten up and are one, between the cannelure of annular piston bottom and the cylinder bottom round pool helical spring are housed; Described cylinder bottom, cylinder cap tighten up with cylinder body respectively, and the cylinder bottom rear side has two parallel oil throughs to the cylinder bottom annular boss, and these two oil throughs connect by vertical core and cylinder bottom annular boss upper surface respectively.
Described dedicated hydraulic mould bases, described cope match-plate pattern are fixed in the slide block bottom surface of single action hydraulic press, and described cylinder bottom is fixed on the work top of single action hydraulic press; Two oilholes of described cylinder bottom rear side can be connected with hydraulic power unit by conduit under fluid pressure.
With existing conical gear flashed cold forging dedicated hydraulic mould bases relatively, lower bolster of the present invention also is a cylinder bottom simultaneously, the one, reduced the mould bases height, reduced the length of guide pillar guide pin bushing, help keeping guiding accuracy and robust motion, the 2nd, improved the processing and manufacturing performance of mould bases and oil cylinder widely; Following die socket cylindrical has increased guiding length and area greatly by cylinder cap endoporus face of cylinder guiding, can improve the stationarity of die motion, can carry the service life of spigot surface again; Between fovea superior die holder and upper cavity die backing plate, be provided with four groups of little push rods and cylindrical polyurethane rubber, polyurethane rubber is compressed when installment state, when the screw that unclamps around the upper cavity die trim ring, compressed polyurethane rubber ejects upper cavity die by little push rod from the fovea superior die holder, be convenient to the loading and unloading and the adjustment of upper cavity die; Helical spring is set between annular piston and cylinder bottom can significantly increases the speed that lower cavity die upwards resets.
Dedicated hydraulic mould bases of the present invention is relatively simple for structure, makes, installs and use easily, and kinetic stability is good during work, the mould bases long service life; Mould bases is installed on the single action hydraulic press and uses, hydraulic cylinder on the mould bases can adopt independently, and hydraulic system drives, also can adopt the hydraulic system of hydraulic press to drive, the coordinated movement of various economic factors of mould bases and hydraulic press has improved technology stability greatly and has produced breath-group fully by the control of the computer control system on the forcing press; By circular hole face guiding in recessed die holder external cylindrical surface and the cylinder cap, significantly increased the guiding area, thereby increased the stationarity of moving after the upper and lower die closure; Between annular piston and cylinder bottom (lower bolster), helical spring is set, after die forging finishes, when first die during with the press ram backhaul, compressed spring by annular piston, die holder and backing plate with the quick jack-up of lower cavity die to upper limit position, not only speed is faster with respect to the pressure jack-up that only depends on pressure oil, current and saving energy consumption.
Description of drawings
Fig. 1 is the schematic diagram of a kind of embodiment of dedicated hydraulic mould bases of the present invention, and promptly the B-B of Fig. 2 is to profile;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 be the A-A of Fig. 2 to profile, i.e. pressure oil duct part schematic diagram on the cylinder bottom (lower bolster) among the embodiment.
The specific embodiment
As shown in Figure 1-Figure 3, dedicated hydraulic mould bases of the present invention comprises cope match-plate pattern 1, upper padding plate 2, polyurethane rubber rod 3, little push rod 4, fovea superior die holder 5, upper cavity die backing plate 6, guide pin bushing 7, guide pillar 8, lower cavity die backing plate 9, as the cylinder cap 10 of lower cavity die guide and limit circle, recessed die holder 11, low punch 12, annular piston 13, cylinder body 14, helical spring 15, as the cylinder bottom 16 of lower bolster, low punch seat 17 is used to guarantee the limited block 18 of die shut height.
During the workpiece flashed cold forging in the course of work of special-purpose liquid mould bases: when the first half of mould and mould bases is in upper limit position, blank is placed the conical gear lower cavity die, start forcing press, the first half of slide block drive mould and mould bases is descending.At first upper and lower die closure, closed whole die moves down together, produce pressure by recessed die holder 11 by fluid in 13 pairs of oil cylinders of annular piston, the size of its pressure is regulated by the overflow valve on the hydraulic system, and the pressure oil when piston moves down in the oil cylinder drains into fuel tank by overflow valve.Simultaneously, piston also compresses helical spring 15.When whole die moved down, the low punch 12 that is fixed on the low punch seat 17 was configured as conical gear with blank extrusion forging.After die forging finishes, the first half of mould and mould bases is with the press ram backhaul, recessed die holder 11 resets together with annular piston 13 moves up rapidly under the effect of 6 helical springs 15, its upper limit position is subjected to cylinder cap 10 restrictions, when piston rose rapidly, the fluid of fuel tank sucks by vacuum and the pressure of pump is full of in-oil cylinder cavity rapidly.

Claims (3)

1, a kind of dedicated hydraulic mould bases, be used for the conical gear flashed cold forging, be made up of mould bases and piston oil-cylinder two parts, mould bases comprises cope match-plate pattern, four groups of guide pillars and bushes, upper cavity die backing plate, lower cavity die backing plate, low punch seat, upper cavity die retainer plates that are symmetrically distributed, upper punch, low punch; Piston oil-cylinder comprises annular piston in the cylinder bottom, cylinder body, cylinder body, as the cylinder cap of lower cavity die guide and limit circle, it is characterized in that:
(1) four groups of little push rod and cylindrical polyurethane rubber rods that are symmetrically distributed is housed between described upper cavity die retainer plate and the upper cavity die backing plate;
(2) described cylinder bottom is directly as lower bolster, is fixed with left and right two groups of limited blocks between itself and the cope match-plate pattern;
(3) low punch is bearing on the low punch seat, and the low punch seat places in the middle circular pit of cylinder bottom and tightens up with cylinder bottom.
2, dedicated hydraulic mould bases as claimed in claim 1 is characterized in that: the top of described annular piston and recessed die holder tighten up and are one, between the cannelure of annular piston bottom and the cylinder bottom round pool helical spring are housed; Described cylinder bottom, cylinder cap tighten up with cylinder body respectively, and the cylinder bottom rear side has two parallel oil throughs to the cylinder bottom annular boss, and these two oil throughs connect by vertical core and cylinder bottom annular boss upper surface respectively.
3, dedicated hydraulic mould bases as claimed in claim 1 or 2 is characterized in that described cope match-plate pattern is fixed in the slide block bottom surface of single action hydraulic press, and described cylinder bottom is fixed on the work top of single action hydraulic press; Two oilholes of described cylinder bottom rear side are connected with hydraulic power unit by conduit under fluid pressure.
CNB2004100613986A 2004-12-20 2004-12-20 Special hydraulic mould stand CN1304138C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100613986A CN1304138C (en) 2004-12-20 2004-12-20 Special hydraulic mould stand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100613986A CN1304138C (en) 2004-12-20 2004-12-20 Special hydraulic mould stand

Publications (2)

Publication Number Publication Date
CN1644267A CN1644267A (en) 2005-07-27
CN1304138C true CN1304138C (en) 2007-03-14

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100391660C (en) * 2005-10-20 2008-06-04 华南理工大学 Moulding frame used for powder compression moulding machine
CN100413614C (en) * 2006-03-22 2008-08-27 江苏太平洋精密锻造有限公司 Inverse conical forming mould for automobile gearbox gear combining tooth
CN101259513B (en) * 2008-04-11 2010-12-15 华中科技大学 Double-occlusive fluid die rack
CN101633030B (en) * 2009-08-20 2011-08-24 上海保捷汽车零部件锻压有限公司 Split forging die based on expansion of plastic deformation zone
CN101890467B (en) * 2010-07-07 2015-07-08 葫芦岛龙源采油配套设备有限公司 Hydraulic upsetter
CN103357804B (en) * 2012-04-01 2015-03-04 华中科技大学 Damping type flow control forming process and die for aluminium-alloy rib-plate forging
CN102773392A (en) * 2012-07-20 2012-11-14 荣成金辰机械制造有限公司 Pneumatic blocking formwork
CN103056264B (en) * 2012-12-06 2015-01-21 周卫星 Closed cold-temperature precision forging die for straight-tooth bevel gear

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000094198A (en) * 1998-09-24 2000-04-04 Tsukiboshi Seisakusho:Kk Die for cold-forging
CN1309002A (en) * 2000-12-29 2001-08-22 华中科技大学 Reducing die for forming parts having internal cavity with non-straight wall
CN1385263A (en) * 2002-06-05 2002-12-18 吉林大学 Closed stamping hydraulic mould frame device
CN2603716Y (en) * 2003-02-26 2004-02-18 华中科技大学 Die forging forming mould of metal extrusion pressing
CN2774674Y (en) * 2004-11-18 2006-04-26 华中科技大学 Special hydraulic form frame

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000094198A (en) * 1998-09-24 2000-04-04 Tsukiboshi Seisakusho:Kk Die for cold-forging
CN1309002A (en) * 2000-12-29 2001-08-22 华中科技大学 Reducing die for forming parts having internal cavity with non-straight wall
CN1385263A (en) * 2002-06-05 2002-12-18 吉林大学 Closed stamping hydraulic mould frame device
CN2603716Y (en) * 2003-02-26 2004-02-18 华中科技大学 Die forging forming mould of metal extrusion pressing
CN2774674Y (en) * 2004-11-18 2006-04-26 华中科技大学 Special hydraulic form frame

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Granted publication date: 20070314

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