GB2505774A - Multi stage press device workpiece locating former - Google Patents
Multi stage press device workpiece locating former Download PDFInfo
- Publication number
- GB2505774A GB2505774A GB201314456A GB201314456A GB2505774A GB 2505774 A GB2505774 A GB 2505774A GB 201314456 A GB201314456 A GB 201314456A GB 201314456 A GB201314456 A GB 201314456A GB 2505774 A GB2505774 A GB 2505774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- workpiece
- locating
- pressing tool
- forming
- multi stage
- 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.)
- Withdrawn
Links
- 238000003825 pressing Methods 0.000 claims abstract description 91
- 230000002040 relaxant effect Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
- B21D22/02—Stamping using rigid devices or tools
-
- 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
-
- 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
- B21D22/24—Deep-drawing involving two drawing operations having effects in opposite directions with respect to the blank
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
-
- 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
- B21D43/003—Positioning devices
-
- 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
- B21D43/021—Control or correction devices in association with moving strips
- B21D43/023—Centering devices, e.g. edge guiding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A multi stage press device for forming through deep drawing or stamping at least one workpiece in at least two consecutive steps. The multi stage press device comprises, a first pressing tool 14 for forming the workpiece 10 in a first one of the steps, and at least one second pressing tool 38 for forming the workpiece in a second subsequent step. The multi stage press device comprises a locator device 26 for locating the workpiece in relation to the second pressing tool (38 in fig 5). The locator device comprises at least one forming element 32 for forming at least one locating form (34) in the workpiece during the first step. The second pressing tool comprises at least one locating element (50) for locating the workpiece as it is transferred from the first pressing tool to the second press tool by engaging the locating form 34 formed in the first step.
Description
Multi Stage Press Device for Forming a Workpiece The invention relates to a multi stage press device for forming, in particular, deep drawing and/or stamping at least one workpiece according to the preamble of patent claim 1.
Such multi stage press devices for deep drawing and/or stamping at least one workpiece in at least two consecutive steps are well known from the general prior art. The multi stage press device comprises a first pressing tool for forming, in particular, deep drawing and/or stamping the workpiece in a first one of the steps. Moreover, the multi stage press device comprises at least one second pressing tool for forming, in particular, deep drawing and/or stamping the workpiece in the second step subsequent to the first step.
For example, the first pressing tool serves for forming a first portion of the workpiece, wherein the second pressing tool serves for forming a second portion of the workpiece, the second portion being different from the first portion. Alternatively, the first pressing tool serves for forming at least a portion of the workpiece, wherein the second pressing tool serves for forming the same portion subsequent to the first step.
It has been shown that radial shift and offset of the workpiece in relation to the second pressing tool can occur because of wrong loading. This means that the workpiece can have a wrong position in relation to the second pressing tool when the workpiece is transferred from the first pressing tool to the second pressing tool. From this wrong position, scoring, tool marks, and excessive thinning as well as wrinkles or even foldings of the workpiece can occur. Moreover, other forming defects and workpiece failure during the forming process can result from wrong loading.
In case of deep drawn parts formed in multiple stages (steps), the location of the workpiece in the pressing tools is very important in the series production process to achieve a time-and cost-efficient automated manufacturing as well as a high quality of deep drawn parts.
In order to realize a correct position of the workpiece in relation to the second pressing tool, it is possible to unload the workpiece from the multi stage press device after the first step and prior to the second step and provide the workpiece with locating elements such as, for example, holes and pockets by machining. After providing the locating elements, the multi stage press device can be loaded with the workpiece again so that the workpiece can be formed in the second step thereby using the locating elements to locate the workpiece in relation to the second pressing tool. However, this process is very cost-and time-consuming.
US 5 572 901 A shows an adjustable locator device for locating a sheet metal workpiece laterally on a metal forming die, the die including a stationary die member, a flanging member movable in a longitudinal direction for forming the sheet metal, and a driver movable with the flanging member. The locator device comprises a base adapted for attachment to the stationary die member, a translational member movably mounted to said base for movement along a first axis, and a locator portion pivotally mounted to said translational member about an axis transverse of the first axis, said locator portion including a workpiece stop surface. The use of the known locator device is restricted to parts having flanges. Other parts or workpieces cannot be located.
It is an object of the present invention to provide a multi stage press device of the previously mentioned kind, which allows for a particularly cost-and time-efficient manufacturing of parts, in particular, deep drawn parts, having a very high quality.
In order to provide a multi stage press device indicated in the preamble of patent claim 1, which allows for a very time-and cost-efficient manufacturing of high quality parts, according to the present invention, the multi stage press device has a locator device for locating the workpiece in relation to the second pressing tool, the locator device comprising at least one forming element for forming at least one locating form of the workpiece during the first step. In other words, the workpiece is provided with at least one locating form by means of the forming element during the first step. This means that the workpiece is not only formed by means of the first pressing tool but also simultaneously by the first forming element so that the locating element of the workpiece is formed by the forming element.
The locator device also comprises at least one locating element for locating the workpiece in relation to the second pressing tool by engaging the locating form subsequent to the first step. Having been formed in the first step, the workpiece is transferred from the first pressing tool to the second pressing tool, wherein the locating element engages the locating form. By engaging the locating form, the locating element forces the formed workpiece into a desired location in relation to the second pressing tool so that the workpiece can be formed by the second pressing tool. Due to this precise positioning, radial shift as well as offset marks, other forming defects, and workpiece failure due to wrong positioning can be avoided. Moreover, unloading the workpiece subsequent to the first step and prior to the second step can be avoided. Hence, fatigue of an operator due to unloading and loading can be avoided as well as the risk of wrong loading and unloading.
The locator device allows for realizing a three dimensional positioning by using the locating form as a 3D-form locator. The locator device acts as a mechanism for exact and reproducible positioning or locating of the formed workpiece in relation to at least one subsequent pressing tool of a multi stage transfer press.
For example, the multi stage press can have moie than the two pressing tools so that the workpiece can be formed, for example, deep drawn and/or stamped in more than the two steps. In such a multi stage transfer press the locating element can be used for positioning the workpiece in relation to pressing tools subsequent to the second pressing tool. In this case, for example, the pressing tool subsequent to the second pressing tool has at least one second locating element of the locator device, the second locating element engaging the locating form to locate the workpiece in relation to the pressing tool subsequent to the second pressing tool.
Further advantages, features, and details of the invention derive from the following description of a preferred embodiment as well as from the drawing. The features and feature combinations previously mentioned in the description as well as the features and feature combinations mentioned in the following description of the figures and/or shown in the figures alone can be employed not only in the respective indicated combinations but also in any other combination or taken alone without leaving the scope of the invention.
The drawing show in: Fig. 1 a workpiece which is formed by deep drawing in five steps by means of a multi stage transfer press having five pressing tools for performing one of the steps each; Fig. 2 a schematic sectional view of a first one of the pressing tools, the multi stage press device having a locator device for locating the workpiece in relation to a second one of the pressing tools, the second pressing tool being subsequent to the first pressing tool, the locator device having at least one forming element for forming at least one locating form of the workpiece and at least one locating element for locating the workpiece in relation to the second pressing tool by engaging the locating form; Fig. 3 a further schematic sectional view of the first pressing tool; Fig. 4 a schematic sectional view of the workpiece after the first step and prior to the second step; Fig. 5 a schematic sectional view of the second pressing tool; Fig. 6 part of a schematic and sectional view of the second pressing tool; Fig. 7 a further schematic sectional view of the second pressing tool; Fig. 8 part of a schematic sectional view of the second pressing tool; and Fig. 9 a schematic sectional view of the workpiece after the second step and prior to the third step.
In the figures the same elements or elements having the same function are equipped with the same reference sign.
Fig. 1 shows a workpiece 10 made of sheet metal. The workpiece 10 is formed in five stages, this means in five steps by deep drawing to manufacture a component 12, for, for example, a vehicle. For deep drawing the workpiece 10, a multi stage press device is used. The multi stage press device comprises five consecutive pressing tools. Each one of the pressing tools is designed to perform one of the steps. After the first step or the first stage and prior to the second step or second stage, the workpiece 10 has a form designated with reference sign Si in Fig. 1. After the second stage or the second step and prior to the third stage or the third step, the workpiece 10 has a form designated with reference sign 52 in Fig. 1. After the third step or the third stage and prior to the fourth step or the fourth stage, the workpiece 10 has a form designated with reference sign S3 in Fig. 1. After the fourth stage or the fourth step and prior to the fifth stage or the fifth step, the workpiece 10 has a form designated with reference sign S4 in Fig. 1. Finally, after the fifth step or the fifth stage, the finished component 12 has a form designated with reference sign 55 in Fig. 1.
Since the finished form 55 of the component 12 is achieved in the final stage or the final step in multi stage draw tools, the finished form S5 of the component 12 or the workpiece respectively cannot be used for locating the workpiece 10 in relation to the pressing tools. Hence, the multi stage press has a locator device for locating the workpiece 10 in relation to the pressing tools subsequent to the first pressing tool as will be described in the following.
Fig. 2 shows the first pressing tool of the multi stage press, the first pressing tool being designated with reference sign 14. The first pressing tool 14 comprises a die 16 and a base element 18 comprising a base plate 20 and a punch 22. The die 16 and the base element 18 are translationally movable in relation to each other so that the die 16 and the base element 18 can be opened and closed.
In order to deep draw the workpiece 10 in the first step (first stage), the die 16 and the base element 18 are opened and the workpiece 10 having the form of a metal blank is positioned in the pressing tool 14 between the die 16 and the base element 18. Then the die 16 and the base element 18 are closed so that the punch 22 engages a cavity 24 of the die 16 thereby forming the workpiece 10 during the first step.
Fig. 2 shows a forming device 28 assigned to the first stage of the multi stage press. The forming device 28 comprises first forming elements in the form of dies 30 and second forming elements in the form of punches 32, the dies 30 being assigned to the die 16 and the punches 32 being assigned to the base element 18. As can be seen from Fig. 2, the dies 30 are mounted on the die 16 so that the dies 30 cannot be moved in relation to the die 16. The punches 32 cannot be moved in relation to the base plate 20. The base element 18 can slide vertically with respect to the punches 22, 32.
The die 16 together with the dies 30 can be moved in relation to the base element 18 and the punches 32 or vice versa. Hence, the punches 32 engage the dies 30 respectively when the first pressing tool 14 is closed. As can be seen particularly good from Figs. 3 and 4, locating forms 34 of the workpiece 10 are formed by means of the forming device 28 during the first step. In other words, when the die 16 and the base element 18 are closed, the locating forms 34 of the workpiece 10 are formed by the punches 32 engaging the dies 30. Preferably, at least two locating forms 34 are provided for better stability of the workpiece 10 when loaded into at least one pressing tool subsequent to the first pressing tool 14.
The workpiece 10 is formed by means of the first pressing tool 14 and provided with the locating forms 34 by means of the forming device 28 simultaneously. The locating forms 34 are formed in respective edge regions 36 of the workpiece 10, the edge regions 36 being scrap areas which will be cut off after the workpiece 10 is completely formed. This means that the scrap areas are cut off after the fifth stage. Advantageously, the locating forms 34 are formed in the scrap areas at the end of the stroke of the first pressing tool 14.
The respective locating form 34 is an external form locating feature (EFLF) finished in the first stage itself, the EFLF not being a part of the final component 12 but being used for location purposes as will be described in the following. The EFLF can be used in the pressing tools subsequent to the first pressing tool l4to locate the workpiece lOin relation to the subsequent pressing tools. For cutting off the scrap areas form the remaining workpiece 10, the multi stage press can comprise a trimming stage subsequent to the fifth stage.
In order to perform the second step of deep drawing the workpiece 10, the second step being subsequent to the first step, the die 16 and the base element 18 are opened so that the formed workpiece 10 can be unloaded from the first pressing tool 14 and transferred to the subsequent second pressing tool shown in Figs. 5 to & and being designated with reference sign 36 as a whole.
The second pressing tool 38 has a die 40 and a base element 42 having a base plate 41 and a punch 44. The die 40 and the base element 42 can be moved in relation to each other so that they can be opened and closed. In order to arrange the workpiece 10 in the second pressing tool 38 between the die 40 and the base element 42, the die 40 and the base element 42 are opened. In order to form the workpiece 10 in the second step (second stage) the die 40 and the base element 42 are closed so that the punch 44 engages a cavity 46 of the die 40.
The locator device is designated with reference sign 26 and comprises a locating device 48 having locating elements 50. When the die 40 and the base element 42 are closed, the locating elements 50 engage the locating forms 34 respectively thereby locating the workpiece 10 in relation to the second pressing tool 38. By engaging the locating forms 34, the workpiece 10 is forced into a desired location or position in relation to the second pressing tool 36 by means of the locating elements 50.
As can be seen particularly good from Figs. 6 and 8, the respective locating element 50 is translationally movable between at least one supporting position and at least one retracted position, the retracted position shown in Figs. 6 and 8. The respective locating element 50 is movable between the supporting position and the retracted position in a direction in which the die 40 and the base element 42 can be moved in relation to each other. This direction is also referred to as "forming position".
In the supporting position, the respective locating element 50 assigned to the base element 42 projects beyond an inner surface 52 of the base element 42 more than in the retracted position. At least a portion of the inner surface 52 serves for forming the The locating elements 50 are designed to support the workpiece 10 in the respective supporting position in such a way that the workpiece 10 is completely arranged at a distance from the inner surface 52. This means that the workpiece 10 does not touch the inner surface 52 in the supporting position and when the second pressing tool 38 is open.
Thereby, the workpiece 10 is located in relation to the second pressing tool 38 by means of the locating device 48 only and nowhere else on the second pressing tool 38. Thus, location redundancies can be avoided. When the second pressing tool 38 is closed, the workpiece 10 is pushed against the inner surface 52 by means of the die 40. Thus, the locating elements 50 are pushed from the respective supporting position into the respective retracted position by means of the die 40 via the workpiece 10. As can be seen from Figs. 6 and 8, the locating elements 50 are translationally movably held on the base element 42.
The locating device 48 also has spring elements 54 which are supported on the base plate 41 one the one side and on the respective locating element 50 on the other side.
When the locating elements 50 are pushed from the respective supporting position into the respective retracted position, the respective spring element 54 is loaded or compressed. When the second pressing tool 38 is opened, the spring elements 54 can relax at least partly thereby pushing the locating elements 50 from the respective rejected position into the respective supporting position. Thus, the locating elements 50 push the workpiece 10 away from the inner surface 52. When the second pressing tool 38 is opened, the workpiece 10 can be unloaded from the second pressing tool 38 and transferred to the third pressing tool. By pushing the workpiece 10 away from the inner surface 52, the workpiece 10 can be unloaded from the second pressing tool 38 very easily.
The base plate 41 has receptacles 56 for receiving the locating elements 50 at least partly. As can be seen from Figs. 6 and 8, spacers 58 and shims 60 are used, the spacers 58 and the shims 60 being arranged between the base plate 41 and the respective locating element 50, the base plate 41 bounding the receptacles 56. The spacers 58 and the shims 60 are supported on the base plate 41 on the one side and the locating element 50 on the other side so that the respective locating element 50 is supported on the base plate 41 via the spacers 58 and the shims 60 in a direction perpendicular to the forming direction, i.e. the direction in which the respective locating element 50 can be moved in relation to the base element 42.
By varying the respective thickness of the respective spacer 58 and/or the shim 60, the position of the respective locating element 50 in relation to the base element 42 can be adjusted. Thus, the respective locating element 50 is an adjustable spring loaded locator (ASLL) which is designed to accommodate a disposition of the EFLF in two perpendicular directions indicated by directional arrows 62 and 64, these directions being perpendicular to the forming direction.
By using the three dimensional EFLF and the ASLL, a very precise and efficient locating of the workpiece 10 in relation to the second pressing tool 38 or in relation to all of the pressing tools subsequent to the first pressing tool 14 can be realized. Thus, there is no need to unload the workpiece 10 from the multi stage press device between two stages.
The locator device 26 can also be used for multi stage press devices for stamping at least one workpiece in multiple stages.
By using the locator device 26 for locating the workpiece 10, radial shift and offset due to wrong loading can be avoided. Thus, forming defects like scoring and tool marks as well as excessive thinning and part failure of the workpiece 10 or the component 12 can be avoided. If the workpiece 10 is arranged in the respective pressing tool by an operator, the operator can locate the workpiece 10 in the respective pressing tool very easily by using the locator device 26. This reduces fatigue of the operator doing loading and unloading.
The respective spring element 54 is to be selected and designed in dependency of the weight of the workpiece 10 since the spring elements 54 have to carry the weight of the workpiece 10. The shape of the respective locating form 34 and the respective locating element 50 can be standardized for any particular range of products, in particular, of the same sheet thickness and could be fitted in standing tools respectively. When using the locator device 26 for different tools, the respective spring elements 54 can be varied according to the weight of the respective workpiece which has to be carried by the respective spring element 54 via the respective locating element 50.
Fig. 9 shows the workpiece 10 after the second step or the second stage and prior to the third step or the third stage. As can be seen from Fig. 9, the workpiece 10 still has the locating forms 34 which can be used for locating the workpiece 10 in relation to the third pressing tool subsequent to the second pressing tool 38.
The locator device 26 also has respective stoppers 57 attached to the base plate 41. By means of the respective stopper 57, the movement of the respective locating element 50 from the retracted position in the direction of the supporting position can be restricted so that the locating element 50 cannot be moved completely out of the respective receptacle 56 by means of the relaxing spring element 54. The movement of the locating element 50 is restricted in such a way that the spacer 58 or the spacer 58 and the shim 60 are pushed against the stopper 57 by the relaxing spring element 54, the spacer 58 and the shim 60 being attached to the locating element, for example, by means of at least one screw.
By using a screw for attaching the shim 60 and the spacer 58 to the locating element 50, the spacer 58 and/or the shim 60 can be replaced very easily so that different variants of the shim 60 and the spacer 58 can be used to adjust the position of the locating element in relation to the second pressing tool 38, in particular, the base plate 41.
Claims (6)
- Claims A multi stage press device for forming, in particular, deep drawing and/or stamping at least one workpiece in at least two consecutive steps, the multi stage press device comprising: -a first pressing tool (14) for forming the workpiece (10) in a first one of the steps, and -at least one second pressing tool (38) for forming the workpiece (10) in the second step subsequent to the first step; characterized in that the multi stage press device comprises a locator device (26) for locating the workpiece (10) in relation to the second pressing tool (38), the locator device (26) comprising: -at least one forming element (32) for forming at least one locating form (34) of the workpiece (10) during the first step, -at least one locating element (50) for locating the workpiece (10) in relation to the second pressing (38) tool by engaging the locating form (24) subsequent to the first step.
- 2. The multi stage press device according to claimi, characterized in that the locating element (50) is movable between at least one supporting position and at least one retracted position in relation to the second pressing tool (38), the locating element (50) projecting beyond at least a portion of a surface (52) of the second pressing tool (38) in the supporting position more than in the retracted position.
- 3. The multi stage press device according to claim 2, characterized in that the locator device (26) comprises at least one spring element (54) being loaded at least in the retracted position of the locating element (50), the spring element (54) being capable of moving the locating element (50) from the retracted position into the supporting position thereby relaxing at least partly.
- 4. The multi stage press device according to any one of claims 2 or 3, characterized in that the locating element (50) is designed to support the workpiece (10) in the supporting position in such a way that the workpiece (10) is arranged at a distance from the surface (52) of the pressing tool.
- 5. The multi stage press device according to any one of the preceding claims, characterized in that the forming element (32) is designed to form the locating form (34) in a scrap area (36) to be cut off from the remaining workpiece (10).
- 6. The multi stage press device according to any one of the preceding claims, characterized in that the locator device (26) comprises at least one second forming element (32) for forming at least one second locating form (34) of the workpiece (10) during the first step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201314456A GB2505774A (en) | 2013-08-13 | 2013-08-13 | Multi stage press device workpiece locating former |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201314456A GB2505774A (en) | 2013-08-13 | 2013-08-13 | Multi stage press device workpiece locating former |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201314456D0 GB201314456D0 (en) | 2013-09-25 |
| GB2505774A true GB2505774A (en) | 2014-03-12 |
Family
ID=49262088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201314456A Withdrawn GB2505774A (en) | 2013-08-13 | 2013-08-13 | Multi stage press device workpiece locating former |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2505774A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734486A (en) * | 2016-11-25 | 2017-05-31 | 沈阳黎明航空发动机(集团)有限责任公司 | The aviation sheet metal component press-processing method and its mould of a kind of biaxial tension |
| CN110918785A (en) * | 2019-11-14 | 2020-03-27 | 四川省菲娅医疗器械有限公司 | Bracket net bottom stamping die and bracket net bottom stamping method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1804607A (en) * | 1928-05-01 | 1931-05-12 | Hudson Motor Car Co | Method of and apparatus for making automobile doors |
-
2013
- 2013-08-13 GB GB201314456A patent/GB2505774A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1804607A (en) * | 1928-05-01 | 1931-05-12 | Hudson Motor Car Co | Method of and apparatus for making automobile doors |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734486A (en) * | 2016-11-25 | 2017-05-31 | 沈阳黎明航空发动机(集团)有限责任公司 | The aviation sheet metal component press-processing method and its mould of a kind of biaxial tension |
| CN110918785A (en) * | 2019-11-14 | 2020-03-27 | 四川省菲娅医疗器械有限公司 | Bracket net bottom stamping die and bracket net bottom stamping method |
| CN110918785B (en) * | 2019-11-14 | 2021-06-25 | 四川省菲娅医疗器械有限公司 | Bracket net bottom stamping die and bracket net bottom stamping method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201314456D0 (en) | 2013-09-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |