CN110802174A - Drawing die with anti unbalance loading structure - Google Patents

Drawing die with anti unbalance loading structure Download PDF

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Publication number
CN110802174A
CN110802174A CN201911168488.8A CN201911168488A CN110802174A CN 110802174 A CN110802174 A CN 110802174A CN 201911168488 A CN201911168488 A CN 201911168488A CN 110802174 A CN110802174 A CN 110802174A
Authority
CN
China
Prior art keywords
die
machine tool
balance
ejector rod
unbalance loading
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.)
Pending
Application number
CN201911168488.8A
Other languages
Chinese (zh)
Inventor
黄祥坤
彭本栋
蔡维刚
陈刘成
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.)
Chery Automobile Co Ltd
Original Assignee
Chery Automobile Co Ltd
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 Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to CN201911168488.8A priority Critical patent/CN110802174A/en
Publication of CN110802174A publication Critical patent/CN110802174A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • B21D22/22Deep-drawing with devices for holding the edge of the blanks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • B21D22/26Deep-drawing for making peculiarly, e.g. irregularly, shaped articles

Abstract

The invention aims to provide a drawing die with an anti-unbalance loading structure, so that the die can still normally work under the condition that a corresponding part has unbalance loading relative to the center of a machine tool, and the abrasion of an air cushion of the machine tool and a guide surface of a sliding block on the machine tool is avoided. The drawing die comprises an upper die and a lower die, wherein the lower die is provided with two or more sets of male dies and blank holders corresponding to the male dies, and the blank holders are movably supported on a machine tool air cushion by utilizing ejector rods; the key point is that the lower die is provided with a plurality of balance ejector rods beside the blank holder, and the balance ejector rods are movably supported on a machine tool air cushion by the ejector rods. In the process of moving the upper die downwards, the upper die is contacted with the balance ejector rod, the machine tool air cushion transmits the unbalance loading force to the upper die through the ejector rod and the balance ejector rod, the upper die transmits the force to the upper sliding block of the machine tool to support the upper sliding block, so that the unbalance loading of the air cushion can be transmitted to the upper die through the balance ejector rod and is balanced with the unbalance loading forming force of the upper die, and the problem of abrasion of the machine tool air cushion and the guide surface of the upper sliding block of the machine tool caused by the unbalance loading is solved.

Description

Drawing die with anti unbalance loading structure
Technical Field
The invention belongs to the field of automobile cold stamping forming, and particularly relates to a drawing die.
Background
In the existing die structure, if a part has unbalance loading relative to the center of a machine tool, the guide surfaces of the machine tool air cushion and the machine tool upper sliding block are abraded due to unbalance loading in the working process of the machine tool air cushion and the machine tool upper sliding block, the precision of the machine tool is influenced, and the machine tool is seriously damaged. If the machine tool has unbalance loading protection, the mould can cause the machine tool to be incapable of working due to unbalance loading on the machine tool.
For example, as shown in fig. 1, in this example, the upper section 2 of the back door of the workpiece and the lower section 3 of the back door of the workpiece are arranged in a double-groove manner on the table top 1 of the machine tool, the forming force center 4 of the upper section 2 of the back door is 590mm away from the center 5 of the machine tool in the left-right direction, the forming force center 6 of the upper section 3 of the back door is 820mm away from the center 5 of the machine tool in the left-right direction, the pressing force of the upper section 2 of the back door is 200 tons, the pressing force of the lower section 3 of the back door is 50 tons, and an offset load exists in the left-right direction during the pressing process. An offset of = ((200 × 590) - (50 × 820))/820 =93.9 tons from the molding force center 6 of the back door lower section 3.
As shown in fig. 2, curve 7 is 1/4000 stiffness unbalance loading curve, curve 8 is 1/6000 stiffness unbalance loading curve, and curve 9 is 1/8000 stiffness unbalance loading curve, these three curves are performance indexes of the machine tool for anti-unbalance loading check provided by the machine tool manufacturer, if the 1/8000 stiffness unbalance loading curve (i.e. curve 9) is adopted for check, it indicates that the allowable unbalance loading of curve 9 in the left and right direction corresponding to 820mm position is about 77.8 tons, the allowable unbalance loading of back door upper section 2 and back door lower section 3 in the left and right direction exceeds the allowable unbalance loading of the machine tool in the left and right direction, according to the traditional mold structure, the machine tool air cushion guide abrasion is caused, and the accuracy and the service life of the machine tool are affected.
Disclosure of Invention
The invention aims to provide a drawing die with an anti-unbalance loading structure, so that the die can still normally work under the condition that a corresponding part has unbalance loading relative to the center of a machine tool, and the abrasion of an air cushion of the machine tool and a guide surface of a sliding block on the machine tool is avoided.
The drawing die with the eccentric load resisting structure comprises an upper die and a lower die, wherein the lower die is provided with two or more sets of male dies and blank holders corresponding to the male dies, and the blank holders are movably supported on a machine tool air cushion by utilizing ejector rods; the key point is that the lower die is provided with a plurality of balance ejector rods beside the blank holder, and the balance ejector rods are movably supported on a machine tool air cushion by the ejector rods.
The lower die is fixed on the working table of the machine tool, the blank holder and the balance ejector rod can move up and down relative to the lower die, when the die is opened, an upper slide block of the machine tool drives an upper die to move upwards for a slide block stroke, the upper die is separated from the lower die at the moment, in the process, the air cushion of the machine tool jacks up the blank holder for a stroke through the ejector rod, and meanwhile, the balance ejector rod jacks up for a stroke through the ejector rod.
In the process of moving the upper die downwards, the upper die is firstly contacted with the balance ejector rod (or simultaneously contacted with the balance ejector rod and the blank holder), the machine tool air cushion transmits the unbalance loading force to the upper die through the ejector rod and the balance ejector rod, the upper die transmits the force to the upper sliding block of the machine tool to support the upper sliding block, so that the unbalance loading of the air cushion can be transmitted to the upper die through the balance ejector rod and is balanced with the unbalance loading forming force of the upper die, and the problem of abrasion of the machine tool air cushion and the guide surface of the upper sliding block of the machine tool caused by the unbalance loading is. Of course, the position setting, the length setting and the like of the balance ejector rod are established on the basis of accurate analysis of the mould unbalance loading condition, and are not described herein again.
Specifically, the lower die is provided with a vertical through hole, the balance ejector rod penetrates through the vertical through hole, and the bottom end of the balance ejector rod is in contact with the top end of the ejector rod. The balance ejector rod can be prevented from shaking and inclining through the vertical through hole.
Furthermore, the guide sleeve is detachably installed in the vertical through hole, the balance ejector rod penetrates through the guide sleeve, the balance ejector rod can be strictly guided and limited through the guide sleeve, and the guide sleeve can be replaced in time after being worn so as to avoid the unbalance loading error caused by guide deviation.
Further, the fixed spacing apron that is equipped with in lower part of lower mould, spacing apron is equipped with the spacing hole that the aperture is less than balanced ejector pin diameter and is greater than the ejector pin diameter, the ejector pin upwards passes the spacing hole of spacing apron, and above-mentioned spacing apron can avoid balanced ejector pin to drop to the lathe working face downwards, also conveniently changes balanced ejector pin simultaneously, and the user only need upwards propose perpendicular through-hole with balanced ejector pin, can change balanced ejector pin, for example change the balanced ejector pin of different length, perhaps set up balanced ejector pin in the position of difference to adapt to the condition of different unbalance loading power.
Furthermore, the upper die is provided with a replaceable hard cushion block at a position corresponding to the balance ejector rod, and when the upper die moves downwards, the cushion block is in contact with the balance ejector rod, so that the upper die can be prevented from being damaged by the balance ejector rod.
Furthermore, the balance ejector rods are arranged on the outer sides of the corresponding blank holders, so that the moment of the balance ejector rods is increased, the number of the balance ejector rods is reduced as much as possible, the requirement on the strength of the balance ejector rods is lowered, and the cost is lowered.
Furthermore, the balance ejector rod is formed by connecting at least two sections of rod bodies through threads, so that the length of the balance ejector rod is adjustable, and a user can flexibly change the length of the balance ejector rod to adapt to the conditions of different unbalance loading forces.
The invention can ensure that the die can still normally work under the condition of unbalance loading by additionally arranging the unbalance loading resistant structure on the drawing die, avoids the abrasion of the air cushion of the machine tool and the guide surface of the sliding block on the machine tool and has good practicability.
Drawings
FIG. 1 is a schematic view of a mold with an offset load of mold forming force.
FIG. 2 is a schematic diagram of the machine tool air cushion left and right direction allowable unbalance loading.
Fig. 3 is a schematic view of the arrangement of the balance jack of embodiment 1.
Fig. 4 is a schematic view of an open state of the drawing die of example 1.
FIG. 5 is a schematic view of the drawing die of example 1 in a closed state of the blank holder.
Fig. 6 is a schematic view of the drawing die of example 1 in a state where the upper die is bottomed.
Description of the drawings: 1. a machine tool table surface; 2. a back door upper section; 3, back door lower section; 4, forming force center of back door upper section; 5. a machine tool center; 6. a back door lower section forming force center; 7. 1/4000 stiffness-offset curve; 8. 1/6000 stiffness-offset curve; 9. 1/8000 stiffness-offset curve; 10. balancing the distribution position of the ejector rods; 11. a machine tool air cushion; 12. a machine tool table surface; 13, lower die; 14, a mandril; 15. an upper blank holder of the back door; 16. back door upper section blank; 17, an upper section male die of the back door; 18. a blank holder at the lower section of the rear door; 19. a back door lower section male die; 20. balancing the ejector rod; 21. a guide sleeve; 22 a cover plate; 23. a machine tool upper slide block; 24. an upper die; 25. cushion blocks; 26. and a lower section blank of the back door.
Detailed Description
The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.
Example 1:
the embodiment provides a drawing die with an anti-unbalance-loading structure aiming at the unbalance-loading condition in the background technology, so that the die can still normally work under the condition that a corresponding part has unbalance loading relative to the center of a machine tool, and the abrasion of an air cushion of the machine tool and a guide surface of an upper sliding block of the machine tool is avoided.
As shown in fig. 3 to 6, the drawing die with the anti-unbalance loading structure of the present embodiment includes an upper die 24 and a lower die 13, the lower die 13 is fixed on the machine tool table 12, and the upper die 24 is driven by an upper slide block 23 of the machine tool; the lower die 13 is provided with a back door upper section male die 17, a back door lower section male die 19, a back door upper section blank holder 15 and a back door lower section blank holder 18, wherein the back door upper section blank holder 15 and the back door lower section blank holder 18 are respectively and movably supported on the machine tool air cushion 11 by utilizing a mandril 14; the lower die 13 is provided with four balance ejector rods 20 (the specific positions of the balance ejector rods 20 are shown in the mark 10 of fig. 3) on the outer side of the blank holder 18 at the lower section of the back door, and the balance ejector rods 20 are movably supported on the machine tool air cushion 11 by ejector rods 14; the upper die 24 is provided with a replaceable hard pad 25 at a position corresponding to the balance ram 20.
Particularly, the lower die 13 is provided with a vertical through hole, a guide sleeve 21 is detachably installed in the vertical through hole, the balance ejector rod 20 penetrates through the vertical through hole downwards, a limiting cover plate 22 is fixedly arranged at the lower part of the lower die 13, the limiting cover plate 22 is provided with a limiting hole with the diameter smaller than that of the balance ejector rod 20 and larger than that of the ejector rod 14, the ejector rod 14 penetrates through the limiting hole of the limiting cover plate 22 upwards, and the bottom end of the balance ejector rod 20 is in contact with the top end of the ejector rod 14. Can carry out strict direction spacing to balanced ejector pin 20 through perpendicular through-hole and uide bushing 21, prevent that balanced ejector pin 20 from rocking and slope, and appear wearing and tearing back when uide bushing 21, can also in time change to avoid because the unbalance loading power error that the direction deviation leads to.
The limiting cover plate 22 can prevent the balance ejector rod 20 from falling down onto the working surface of the machine tool, meanwhile, the balance ejector rod 20 can be replaced conveniently, and a user only needs to lift the balance ejector rod 20 upwards to form a vertical through hole, for example, the balance ejector rod 20 with different lengths can be replaced, or the balance ejector rod 20 is arranged at different positions to adapt to the conditions of different unbalance loading forces.
The two blank holders and the balance ejector rod 20 can move up and down relative to the lower die 13, when the die is opened, the upper slide block 23 of the machine tool drives the upper die 24 to move upwards for a slide block stroke, at the moment, the upper die 24 is separated from the lower die 13, in the process, the machine tool air cushion 11 jacks up the blank holders for one stroke through the ejector rod 14, and simultaneously, the balance ejector rod 20 jacks up for one stroke through the ejector rod 14.
The back door upper section blank 16 is placed above the back door upper section punch 17, the edge of the back door upper section blank is lapped on the back door upper section blank holder 15, the back door lower section blank 26 is placed above the back door lower section punch 19, and the edge of the back door lower section blank holder 18 is lapped on the back door lower section blank holder.
In the process of moving the upper die 24 downwards, the upper die 24 is firstly contacted with the balance ejector rod 20 (or simultaneously contacted with the balance ejector rod 20 and the blank holder), the machine tool air cushion 11 transmits the unbalance loading force to the upper die 24 through the ejector rod 14 and the balance ejector rod 20, the upper die 24 transmits the force to the upper slide block 23 of the machine tool to support the upper slide block 23, so that the unbalance loading of the air cushion can be transmitted to the upper die 24 through the balance ejector rod 20 and is balanced with the unbalance loading forming force of the upper die 24, and the problem of abrasion of the guide surfaces of the machine tool air cushion 11 and the upper slide block 23 of the machine tool caused by the unbalance loading is. Of course, the position setting, the length setting, and the like of the balance mandril 20 are based on the accurate analysis of the mold unbalance loading condition, and are not described herein again.
In the example of fig. 3, each balance ram 20 transmits an offset load force of about (93.9 × 820)/(1425 × 4) =13.5 tons, so that the machine tool air cushion 11 and the upper slide block 23 are balanced in force.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description, as long as the invention is capable of being practiced without modification in any way whatsoever, and is capable of other applications without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A drawing die with an anti-unbalance loading structure comprises an upper die and a lower die, wherein the lower die is provided with two or more sets of male dies and blank holders corresponding to the male dies, and the blank holders are movably supported on a machine tool air cushion by utilizing ejector rods; the lower die is characterized in that a plurality of balance ejector rods are arranged beside the blank holder of the lower die, and the balance ejector rods are movably supported on a machine tool air cushion by the ejector rods.
2. The drawing die with the eccentric load resisting structure as claimed in claim 1, wherein the lower die is provided with a vertical through hole, the balance ejector rod penetrates through the vertical through hole, and the bottom end of the balance ejector rod is in contact with the top end of the ejector rod.
3. The drawing die with the eccentric load resisting structure as claimed in claim 2, wherein a guide sleeve is detachably mounted in the vertical through hole, and the balance ejector rod penetrates through the guide sleeve.
4. The drawing die with the eccentric load resisting structure as claimed in claim 2, wherein a limiting cover plate is fixedly arranged at the lower part of the lower die, the limiting cover plate is provided with a limiting hole, the diameter of the limiting hole is smaller than the diameter of the balance ejector rod and larger than the diameter of the ejector rod, and the ejector rod penetrates through the limiting hole of the limiting cover plate upwards.
5. The drawing die with the structure resisting unbalanced loading according to claim 1, 2, 3 or 4, wherein the upper die is provided with a replaceable hard cushion block at a position corresponding to the balance ejector rod.
6. The drawing die with the eccentric load resisting structure as claimed in claim 1, 2, 3 or 4, wherein the balance ejector rods are arranged outside the corresponding blank holders.
7. The drawing die with the eccentric load resisting structure as claimed in claim 1, 2, 3 or 4, wherein the balance ejector rod is formed by connecting at least two rod bodies through threads, so that the length of the balance ejector rod is adjustable.
CN201911168488.8A 2019-11-25 2019-11-25 Drawing die with anti unbalance loading structure Pending CN110802174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911168488.8A CN110802174A (en) 2019-11-25 2019-11-25 Drawing die with anti unbalance loading structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911168488.8A CN110802174A (en) 2019-11-25 2019-11-25 Drawing die with anti unbalance loading structure

Publications (1)

Publication Number Publication Date
CN110802174A true CN110802174A (en) 2020-02-18

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102416421A (en) * 2011-12-16 2012-04-18 奇瑞汽车股份有限公司 Method for balancing loads during mold production
CN203992010U (en) * 2014-07-25 2014-12-10 安徽江淮汽车股份有限公司 A kind of balanced controls of multi-station mold
CN104959447A (en) * 2015-07-14 2015-10-07 武汉理工大学 Unbalanced load active balance precise stamping die structure
CN205436796U (en) * 2015-12-25 2016-08-10 佛山市成阳正大模具五金塑料有限公司 Ejector pin is balanced structure for to multi -station die structure
CN107584023A (en) * 2017-10-10 2018-01-16 合肥常青机械股份有限公司 A kind of automobile uses push rod multi-station mold
CN207103593U (en) * 2017-08-07 2018-03-16 深圳兴先达五金塑胶制品有限公司 A kind of diel device for discharging
CN208466990U (en) * 2018-06-21 2019-02-05 安徽江淮汽车集团股份有限公司 A kind of balance post rod of multi-station mold
CN208555666U (en) * 2018-08-02 2019-03-01 安徽江淮汽车集团股份有限公司 A kind of drawing composite die
CN209139587U (en) * 2018-11-23 2019-07-23 联伟汽车零部件(重庆)有限公司 The adjustable mandril of drawing die and blank holder press structure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102416421A (en) * 2011-12-16 2012-04-18 奇瑞汽车股份有限公司 Method for balancing loads during mold production
CN203992010U (en) * 2014-07-25 2014-12-10 安徽江淮汽车股份有限公司 A kind of balanced controls of multi-station mold
CN104959447A (en) * 2015-07-14 2015-10-07 武汉理工大学 Unbalanced load active balance precise stamping die structure
CN205436796U (en) * 2015-12-25 2016-08-10 佛山市成阳正大模具五金塑料有限公司 Ejector pin is balanced structure for to multi -station die structure
CN207103593U (en) * 2017-08-07 2018-03-16 深圳兴先达五金塑胶制品有限公司 A kind of diel device for discharging
CN107584023A (en) * 2017-10-10 2018-01-16 合肥常青机械股份有限公司 A kind of automobile uses push rod multi-station mold
CN208466990U (en) * 2018-06-21 2019-02-05 安徽江淮汽车集团股份有限公司 A kind of balance post rod of multi-station mold
CN208555666U (en) * 2018-08-02 2019-03-01 安徽江淮汽车集团股份有限公司 A kind of drawing composite die
CN209139587U (en) * 2018-11-23 2019-07-23 联伟汽车零部件(重庆)有限公司 The adjustable mandril of drawing die and blank holder press structure

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* Cited by examiner, † Cited by third party
Title
吕进: "多工位压力机在汽车生产中的应用 ", 《模具制造》 *

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