CN114383953A - Plate bending test device and method - Google Patents
Plate bending test device and method Download PDFInfo
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- CN114383953A CN114383953A CN202111478623.6A CN202111478623A CN114383953A CN 114383953 A CN114383953 A CN 114383953A CN 202111478623 A CN202111478623 A CN 202111478623A CN 114383953 A CN114383953 A CN 114383953A
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- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 238000005452 bending Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 11
- 238000010998 test method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to a plate bending test device and a method, which comprises a male die base, a male die clamping end, a male die, a female die supporting seat, a female die moving rod, a female die base and a female die; the bottom of the male die clamping end is fixedly connected with a male die, the male die clamping end is fixedly connected to the center of a male die base through bolts, and four corners of the male die base are fixedly connected with four sliding guide columns; the die sliding guide rail is arranged in the middle of the die base, the die base penetrates through the die base from left to right, the die is in sliding connection with the die sliding guide rail, and the die can move on the die sliding guide rail. The advantages are that: expensive testing machine can be replaced by cheap mould, investment cost of equipment is saved, automatic adjustment and locking of the distance between the female dies can be realized, centering degree can be kept between the male die and the female die all the time, and male dies of different specifications can be replaced quickly and conveniently.
Description
Technical Field
The invention belongs to the field of metal plate performance measurement, and particularly relates to a plate bending test device and a method.
Background
The V-shaped bending test or the U-shaped bending test requires two power of longitudinal stamping and transverse extrusion, a female die capable of freely moving is required, the distance between the female dies is locked, the centering degree of the male die and the female die is always kept, and the male die can be conveniently replaced. In general, the power of the plate forming tester is a single-acting or double-acting hydraulic forming machine, the acting direction is longitudinal movement, the function of transverse force in the bending test cannot be realized, and a special bending forming tester needs to be purchased.
In the prior art, patent CN201710805145.2 discloses a plate center bending test fixture and a loading head, wherein a sample needs to be clamped, and a punch is cylindrical or square-column shaped, and is not used for performing a standard v-shaped or U-shaped test, and is more similar to a non-standard cup test. Patent CN201320089689.0 discloses a plate sample bending test device, which relates to the part of plate bending springback test, and needs to manually adjust the positions of two brackets and fix them with screws, so that it is difficult to keep the alignment between the male die and the female die. Patent CN201920660888.X discloses a three-point bending test device, and patent CN201420215840.5 discloses a special bending test anchor clamps of universal tester, and these two patents are all through the interval of manual mode regulation die, do not relate to the change mode of terrace die and die centering problem.
The device and the method can realize automatic adjustment and locking of the distance between the female dies, can keep the centering degree between the male dies and the female dies all the time, and can quickly and conveniently replace the male dies with different specifications.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a plate bending test device and a plate bending test method, which can be used for performing a V-shaped bending test or a U-shaped bending test on a plate, save the investment cost of equipment, realize the automatic adjustment and locking of the distance between female dies, always keep the alignment between a male die and a female die, and realize the quick and convenient replacement of male dies with different specifications.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a plate bending test device comprises a male die base, a male die clamping end, a male die, a female die supporting seat, a female die moving rod, a female die base and a female die;
the bottom of the male die clamping end is fixedly connected with a male die, the male die clamping end is fixedly connected to the center of a male die base through a bolt, and a sliding guide pillar is fixedly connected to the male die base;
a female die sliding guide rail is arranged in the middle of the female die base, and the female die can slide on the female die sliding guide rail;
the female die supporting seat consists of an upper female die supporting seat, a lower female die supporting seat and a connecting column, the upper and lower female die supporting seats which are arranged in parallel are fixedly connected through the connecting column, and a through hole is formed in the center of the upper female die supporting seat so that the male die can penetrate through the upper female die supporting seat to move up and down;
the die shifting rod is symmetrically arranged, one end of the die shifting rod is connected with the die through a rotating shaft, the other end of the die shifting rod is connected with the upper die supporting seat through a rotating shaft, the die consists of a left die and a right die which are symmetrically arranged, and the die base and the die shifting rod act together to enable the left die and the right die to move oppositely, so that the distance between the dies is changed.
The bottom of the male die clamping end is provided with an interface, and the male die is inserted into the interface of the male die clamping end and is fixed through a bolt.
The connecting column is a hollow guide column.
The connecting columns are arranged at four corners of the upper female die supporting seat and correspond to the sliding guide columns, so that the sliding guide columns are in sleeve joint with the connecting columns.
The male die base, the upper female die supporting seat and the lower female die supporting seat are the same in size.
The radius of the fillet at the opening part of the female die and the radius of the cambered surface at the bottom of the male die accord with the specification of the forming performance and the test method of the metal sheet of the standard GB/T15825.5-2008.
A plate bending test method comprises the following steps:
1) carrying out V-shaped bending or U-shaped bending test on a rectangular strip sample with the thickness range of the metal plate being 0.3-4 mm;
2) the left and right female dies are assembled on a female die sliding guide rail of a female die base, the female die base is placed in a through hole of a lower female die supporting seat, the positions of the female die supporting seat and the female die base are adjusted to enable the female die base to move up and down relative to the female die supporting seat without interference, and a female die moving rod arranged on the left and right is respectively connected with the female die and an upper female die supporting seat;
3) placing the male die base on the female die supporting seat, enabling the sliding guide columns to respectively penetrate through the connecting columns, and fixing the male die clamping end at the center of the male die base through a bolt;
4) selecting male dies with different bottom cambered surface radiuses or cushion dies with different thicknesses, inserting the male dies or the cushion dies into the male die clamping end interface and fixing the male dies or the cushion dies through bolts; the female die base moves up and down, the left female die and the right female die move oppositely under the action of the female die moving rod, and the distance between the left female die and the right female die is changed;
5) the rectangular strip-shaped sample is placed on the female die, the female die supporting seat, the female die base and the female die synchronously move upwards, and the distance between the left female die and the right female die is kept unchanged until the male die contacts the sample and forms the sample with a certain bending radius.
6) And (5) repeating the steps 4) to 5), adjusting the distance between the female dies, testing, and finishing the test until no crack or obvious dent is generated on the surface of the sample, wherein the minimum bending radius is the bending forming performance index of the metal sheet.
Compared with the prior art, the invention has the beneficial effects that:
a plate bending test device and a plate bending test method can replace an expensive testing machine with a cheap mold, can effectively save the input cost of equipment, can realize automatic adjustment and locking of the distance between female molds, can keep the centering degree between male molds and female molds all the time, and can quickly and conveniently replace male molds of different specifications.
Drawings
Fig. 1 is a front view of a bending test apparatus for a sheet material forming tester.
Fig. 2 is a schematic structural view of a bending test apparatus for a sheet material forming tester.
Fig. 3 is an operation state diagram of a bending test apparatus for a sheet material forming tester.
FIG. 4 is a schematic view of the connection structure of the punch clamping end and the punch.
Fig. 5 is a schematic diagram of the relative positions of the female die, the female die base and the female die support seat.
In the figure: 1. a male die base; 2. sliding the guide post; 3. a male die clamping end; 4. a male die; 5. a sample; 6. an upper female die supporting seat; 7. connecting columns; 8. a female die moving rod; 9. a female die; 10. a lower concave die supporting seat; 11. a female die sliding guide rail; 12. and a female die base.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
Referring to fig. 1-5, a plate bending test device comprises a male die base 1, a clamping end 3 of a male die 4, a female die 9 supporting seat, a female die moving rod 8, a female die base 12 and a female die 9; the bottom of the clamping end 3 of the male die 4 is provided with a connector, and the male die 4 is fixedly connected with the connector through a bolt, so that the male dies 4 with different specifications can be conveniently replaced. The clamping end 3 of the male die 4 is fixedly connected to the center of the male die base 1 through bolts, four sliding guide columns 2 are fixedly connected to four corners of the male die base 1, and the male die base 1 is fixed to a fixing platform at the upper end of the forming testing machine through bolts.
The middle of the female die base 12 is provided with a female die sliding guide rail 11, the female die sliding guide rail 11 is assembled on a groove of the female die base 12, the female die sliding guide rail 11 penetrates through the female die base 12 from left to right, the female die 9 is in sliding connection with the female die sliding guide rail 11, and the female die 9 can move on the female die sliding guide rail 11.
Die 9 supporting seat is by last die supporting seat 6, lower die supporting seat 10, spliced pole 7 is constituteed, go up die supporting seat 6, lower die supporting seat 10 parallel arrangement each other, and go up die supporting seat 6, through spliced pole 7 fixed connection between the lower die supporting seat 10, it is fixed to make last die supporting seat 6 and lower die supporting seat 10 interval, it is equipped with the through-hole to go up die supporting seat 6 center, the through-hole can be the rectangle, make terrace die 4 can pass last die supporting seat 6 and reciprocate, and its size should be able to make things convenient for die base 12 to have no interference from top to bottom and remove. And the female die 9 supporting seat is fixed on a moving platform at the lower end of the forming tester through a bolt.
The die 9 comprises the left die that the symmetry set up, the right die is constituteed, die travel bar 8 symmetry sets up, control die 9 and connect respectively through the pivot about on die travel bar 8, make it can rotate relatively, control die travel bar 8 and connect on last die supporting seat 6 through the pivot, make it can rotate relatively, die base 12 cup joints on the shaping post of forming test machine, the shaping post of forming test machine can drive die base 12 and reciprocate perpendicularly, die base 12 and die travel bar 8 combined action impel about die 9 opposite direction move, make the interval of die 9 change.
Wherein, the bottom of the clamping end 3 of the male die 4 is provided with a connector, and the male die 4 is inserted into the connector of the clamping end 3 of the male die 4 and fixed by a bolt. The connecting columns 7 are four hollow guide columns, the connecting columns 7 are arranged at four corners of the upper female die supporting seat 6 and correspond to the sliding guide columns 2, so that the sliding guide columns 2 are sleeved with the connecting columns 7, the connecting columns 7 and the sliding guide columns 2 on the male die base 1 can slide in a nested mode during die assembly, and centering performance between the male die 4 and the female die 9 can be guaranteed. The male die base 1, the upper female die supporting seat 6 and the lower female die supporting seat 10 are the same in size. The fillet radius of the mouth part of the female die 9 and the radius of the cambered surface at the bottom of the male die 4 meet the standard GB/T15825.5-2008 metal sheet forming performance and test method part 5: and (4) bending test.
Referring to fig. 1 to 5, a bending test method for a sheet forming tester includes the steps of:
1) the V-shaped bending or U-shaped bending test is carried out on the rectangular strip-shaped test sample 5 with the metal plate thickness range of 0.3 mm-4 mm, the plate forming test machine is used for completing the V-shaped bending or U-shaped bending test, the rectangular strip-shaped test sample 5 with the metal plate thickness range of 0.3 mm-4 mm, the width range of the test sample 5 is 20 mm-50 mm, the length range is 150 mm-200 mm, the male die 4 is composed of male dies 4 (or cushion dies with different thicknesses) with different bottom cambered surface radiuses, and the bottom cambered surface radiuses of the male dies 4 are spaced at intervals of 0.1mm, 0.2mm, 0.3mm or 0.4mm and range is 0.1 mm-0.4 mm. The thickness of the cushion mold is 0.2mm or 0.4mm as interval, and the range is 0.2 mm-0.8 mm.
The plate forming tester is a double-acting forming tester with the upper end being a fixed platform and the lower end being provided with a movable platform and a hydraulic forming column;
2) lowering the motion platform of the forming tester to the minimum, placing a female die 9 supporting seat on the motion platform of the forming tester, assembling a left female die 9 and a right female die 9 on a female die sliding guide rail 11 of a female die base 12, placing the female die base 12 in a through hole of a lower female die supporting seat 10, adjusting the positions of the female die 9 supporting seat and the female die base 12 to enable the female die base 12 to be sleeved on a forming column of the forming tester, moving the forming column of the forming tester up and down to enable the female die base 12 to move up and down relative to the female die 9 supporting seat without interference, fixing the lower female die supporting seat 10 on the motion platform of the forming tester by bolts, and respectively connecting the female die 9 and the upper female die supporting seat 6 by using a female die moving rod 8 arranged on the left and the right;
3) placing the male die base 1 on a female die 9 supporting seat, enabling the sliding guide pillars 2 to respectively penetrate through the connecting columns 7, lifting a moving platform of a forming testing machine, enabling the male die base 1 to be in contact with an upper end fixing platform of the forming testing machine, and fixing the male die base 1 on the upper end fixing platform of the forming testing machine by using bolts; moving a moving platform of the forming tester downwards, and fixing a clamping end 3 of a male die 4 at the center of a male die base 1 through a bolt;
4) v-shaped (U-shaped) bending tests were performed: selecting convex dies 4 with different bottom cambered surface radiuses or cushion dies with different thicknesses, inserting the convex dies 4 or the cushion dies into the interfaces of the clamping ends 3 of the convex dies 4 and fixing the convex dies or the cushion dies through bolts; moving a forming column of the forming tester to enable the female die base 12 to move up and down, and enabling the left female die 9 and the right female die 9 to move oppositely under the action of the female die moving rod 8 to change the distance between the left female die 9 and the right female die 9;
5) the rectangular strip-shaped test sample 5 is placed on the female die 9, and the motion platform and the forming column of the forming testing machine synchronously move, so that the female die 9 supporting seat, the female die base 12 and the female die 9 synchronously move upwards, and the distance between the left female die 9 and the right female die 9 is kept unchanged until the male die 4 contacts the test sample 5 and forms the test sample 5 with a certain bending radius.
6) And (5) repeating the steps 4) to 5), adjusting the distance between the female dies 9, and performing the test until no crack or obvious dent is generated on the surface of the sample 5, wherein the minimum bending radius is the bending forming performance index of the metal sheet.
Claims (7)
1. A plate bending test device is characterized by comprising a male die base, a male die clamping end, a male die, a female die supporting seat, a female die moving rod, a female die base and a female die;
the bottom of the male die clamping end is fixedly connected with a male die, the male die clamping end is fixedly connected to the center of a male die base through a bolt, and a sliding guide pillar is fixedly connected to the male die base;
a female die sliding guide rail is arranged in the middle of the female die base, and the female die can slide on the female die sliding guide rail;
the female die supporting seat consists of an upper female die supporting seat, a lower female die supporting seat and a connecting column, the upper and lower female die supporting seats which are arranged in parallel are fixedly connected through the connecting column, and a through hole is formed in the center of the upper female die supporting seat so that the male die can penetrate through the upper female die supporting seat to move up and down;
the die shifting rod is symmetrically arranged, one end of the die shifting rod is connected with the die through a rotating shaft, the other end of the die shifting rod is connected with the upper die supporting seat through a rotating shaft, the die consists of a left die and a right die which are symmetrically arranged, and the die base and the die shifting rod act together to enable the left die and the right die to move oppositely, so that the distance between the dies is changed.
2. The plate bending test device according to claim 1, wherein the bottom of the male die clamping end is provided with an interface, and the male die is inserted into the interface of the male die clamping end and is fixed through a bolt.
3. The apparatus for testing sheet bending according to claim 1, wherein the connecting column is a hollow guide post.
4. The apparatus for testing sheet bending according to claim 1, wherein the connecting columns are disposed at four corners of the supporting base of the upper and lower dies, and correspond to the sliding guide columns, so that the sliding guide columns are sleeved with the connecting columns.
5. The plate bending test device according to claim 1, wherein the male die base, the upper female die supporting seat and the lower female die supporting seat have the same size.
6. The sheet bending test device according to claim 1, wherein the radius of the fillet at the mouth part of the female die and the radius of the cambered surface at the bottom part of the male die conform to the specification of the standard GB/T15825.5-2008 sheet metal forming performance and test method.
7. A method for testing the bending of a sheet material, carried out by means of a device according to any one of claims 1 to 6, characterized in that it comprises the following steps:
1) carrying out V-shaped bending or U-shaped bending test on a rectangular strip sample with the thickness range of the metal plate being 0.3-4 mm;
2) the left and right female dies are assembled on a female die sliding guide rail of a female die base, the female die base is placed in a through hole of a lower female die supporting seat, the positions of the female die supporting seat and the female die base are adjusted to enable the female die base to move up and down relative to the female die supporting seat without interference, and a female die moving rod arranged on the left and right is respectively connected with the female die and an upper female die supporting seat;
3) placing the male die base on the female die supporting seat, enabling the sliding guide columns to respectively penetrate through the connecting columns, and fixing the male die clamping end at the center of the male die base through a bolt;
4) selecting male dies with different bottom cambered surface radiuses or cushion dies with different thicknesses, inserting the male dies or the cushion dies into the male die clamping end interface and fixing the male dies or the cushion dies through bolts; the female die base moves up and down, the left female die and the right female die move oppositely under the action of the female die moving rod, and the distance between the left female die and the right female die is changed;
5) the rectangular strip-shaped sample is placed on the female die, the female die supporting seat, the female die base and the female die synchronously move upwards, and the distance between the left female die and the right female die is kept unchanged until the male die contacts the sample and forms the sample with a certain bending radius.
6) And (5) repeating the steps 4) to 5), adjusting the distance between the female dies, testing, and finishing the test until no crack or obvious dent is generated on the surface of the sample, wherein the minimum bending radius is the bending forming performance index of the metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111478623.6A CN114383953A (en) | 2021-12-06 | 2021-12-06 | Plate bending test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111478623.6A CN114383953A (en) | 2021-12-06 | 2021-12-06 | Plate bending test device and method |
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| Publication Number | Publication Date |
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| CN114383953A true CN114383953A (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111478623.6A Pending CN114383953A (en) | 2021-12-06 | 2021-12-06 | Plate bending test device and method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201163260Y (en) * | 2007-08-24 | 2008-12-10 | 重庆工学院 | Experimental device for plate bending property |
| CN201607362U (en) * | 2010-01-14 | 2010-10-13 | 宝山钢铁股份有限公司 | Die for bending test of metal sheet |
| CN203083893U (en) * | 2013-02-27 | 2013-07-24 | 中联重科股份有限公司 | Plate sample bending test device |
| CN203894103U (en) * | 2014-04-30 | 2014-10-22 | 南通市产品质量监督检验所 | Special bending test fixture for universal testing machine |
| CN109175112A (en) * | 2018-07-27 | 2019-01-11 | 沈阳航空航天大学 | A kind of aperture synchronizes the thin plate bending experimental rig of symmetrical adjustment and punch-pin quick change |
| CN210037467U (en) * | 2019-05-09 | 2020-02-07 | 中国商用飞机有限责任公司 | Three-point bending test device |
| CN112067461A (en) * | 2020-08-24 | 2020-12-11 | 中国飞机强度研究所 | Composite material bending test device |
| CN212807900U (en) * | 2020-08-26 | 2021-03-26 | 中铝东南材料院（福建）科技有限公司 | 180-degree bending test device for metal |
-
2021
- 2021-12-06 CN CN202111478623.6A patent/CN114383953A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201163260Y (en) * | 2007-08-24 | 2008-12-10 | 重庆工学院 | Experimental device for plate bending property |
| CN201607362U (en) * | 2010-01-14 | 2010-10-13 | 宝山钢铁股份有限公司 | Die for bending test of metal sheet |
| CN203083893U (en) * | 2013-02-27 | 2013-07-24 | 中联重科股份有限公司 | Plate sample bending test device |
| CN203894103U (en) * | 2014-04-30 | 2014-10-22 | 南通市产品质量监督检验所 | Special bending test fixture for universal testing machine |
| CN109175112A (en) * | 2018-07-27 | 2019-01-11 | 沈阳航空航天大学 | A kind of aperture synchronizes the thin plate bending experimental rig of symmetrical adjustment and punch-pin quick change |
| CN210037467U (en) * | 2019-05-09 | 2020-02-07 | 中国商用飞机有限责任公司 | Three-point bending test device |
| CN112067461A (en) * | 2020-08-24 | 2020-12-11 | 中国飞机强度研究所 | Composite material bending test device |
| CN212807900U (en) * | 2020-08-26 | 2021-03-26 | 中铝东南材料院（福建）科技有限公司 | 180-degree bending test device for metal |
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