CN112439839A - Forked unequal-diameter sleeve forming die - Google Patents
Forked unequal-diameter sleeve forming die Download PDFInfo
- Publication number
- CN112439839A CN112439839A CN202011170210.7A CN202011170210A CN112439839A CN 112439839 A CN112439839 A CN 112439839A CN 202011170210 A CN202011170210 A CN 202011170210A CN 112439839 A CN112439839 A CN 112439839A
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- Prior art keywords
- die
- plate
- bump
- forming
- male
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Classifications
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- 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
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
- B21D45/04—Ejecting devices interrelated with motion of tool
-
- 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
- B21D53/00—Making other particular articles
- B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
Abstract
The invention discloses a forming die for forked unequal-diameter sleeves, which relates to the technical field of forming dies and comprises the following steps: the device comprises a first template, a second template, a male die and a female die, wherein the first template and the second template are arranged oppositely; the male die comprises: the female die is provided with a first forming groove and a second forming groove which are matched with the first lug and the second lug; the forming die further comprises a material supporting plate arranged in parallel with the first template, a through hole is formed in the material supporting plate, and the material supporting plate is sleeved on the male die in a sliding mode through the through hole.
Description
Technical Field
The invention relates to the technical field of forming dies, in particular to a forming die for fork-shaped sleeves with unequal diameters.
Background
The heating air conduit forked sleeve is an important part on an aircraft engine, and a schematic diagram of a forming process of the heating air conduit forked sleeve is shown in figure 1. The part is formed by applying a certain load to a forming die from a flat plate blank, and plastically deforming the blank to obtain the shape shown in the figure. Because the angle of the fork is small and the diameter is unequal, when the traditional process is adopted for pressing, the sheet metal material at the cross part is in the state of local bending, stretching and pressing film pasting, and the stress flowing direction of the material is complex. In the stamping or hydraulic forming process, the original blank is unstable due to the fact that a local contact point is at a large diameter part and a small diameter part is in a suspension state, and the problems of deviation, wrinkling, cracking and the like occur in forming. The smooth molding can not be realized, and the trial production of the engine conduit is influenced. In the sheet metal part press forming process, the mould structure determines the forming quality of parts and whether the forming can be finished.
Disclosure of Invention
The invention aims to provide a forming die for a fork-shaped unequal-diameter sleeve, which solves the problem of poor forming quality of the forming die caused by suspension instability of a part on the side with a smaller diameter in the forming process of the existing fork-shaped unequal-diameter sleeve.
The technical scheme for solving the technical problems is as follows:
a forked unequal-diameter sleeve forming die comprises: the device comprises a first template, a second template, a male die and a female die, wherein the first template and the second template are arranged oppositely; the male die comprises: the female die is provided with a first forming groove and a second forming groove which are matched with the first lug and the second lug; the forming die further comprises a material supporting plate arranged in parallel with the first die plate, a through hole matched with the outline of the male die is formed in the material supporting plate, and the material supporting plate is sleeved on the male die in a sliding mode through the through hole.
The die is used for pressing and molding 1/2 forked unequal-diameter sleeves from a flat plate blank, and two 1/2 forked unequal-diameter sleeves are oppositely welded to obtain the final sleeve. The first template and the second template are used for arranging a male die and a female die for forming, the first template and the second template are arranged on a stamping or hydraulic device, and the second template is pushed to the first template under the power of the device, so that the female die is matched with the male die to press and form the plate; the male die comprises two convex blocks with different diameters, the outer contour of the convex block is matched with a final product, the diameter of the first convex block is larger, the diameter of the second convex block is smaller, when the female die moves towards the male die, the local contact point of the flat blank is at the larger diameter position, and the flat blank at the smaller diameter position is in a suspension state and is unstable, so that the first template is provided with the retainer plate, the retainer plate is provided with the through hole, the male die penetrates through the first through hole to be fixed on the first template, and in the pressing process, the retainer plate plays a supporting role on the flat blank at the outer edge of the male die, so that the flat blank is prevented from being in the suspension state at the smaller diameter position, and the retainer plate and the first template are arranged in a sliding mode and can move downwards along with the second template. A guide device is omitted on the die, and the die is self-guided and aligned by a punch and a die in the working process. The principle of self-steering alignment is based on that the molded surface of the punch-die and the molded surface of the switching can be attached after the material thickness is added, and the molded surfaces are mutually limited in the die assembly process, so that the self-alignment is achieved.
Further, in a preferred embodiment of the present invention, the retainer plate is provided with a plurality of material blocking pins, and the female die is provided with holes matched with the material blocking pins.
The material blocking pin on the material supporting plate can fix the flat plate blank, thereby reducing the slippage in the forming process.
Further, in a preferred embodiment of the present invention, the first mold plate corresponding to the lower surface of the retainer plate is provided with an ejection through hole.
The first template is provided with an ejection through hole, and the ejector rod penetrates through the ejection through hole to be connected with the material supporting plate, so that the material supporting plate is driven to slide, and the material supporting plate plays a supporting role on the flat plate blank in the pressing process.
Further, in a preferred embodiment of the present invention, one surfaces of the first protrusion and the second protrusion close to the concave mold are arc surfaces, and an included angle between an axis of the first protrusion and an axis of the second protrusion is 45 °.
The upper surfaces of the first lug and the second lug are forming surfaces which are arc surfaces, and the included angle of the axes of the first lug and the second lug is 45 degrees and is matched with the parameters of the final required product.
Further, in a preferred embodiment of the invention, the fit clearance between the male die and the female die is 1.07-1.1 mm.
The clearance between the male die and the female die provides a forming space for the blank.
Further, in the preferred embodiment of the invention, the materials of the male die and the female die are both CrWMn, and the hardness is HRC 55-60.
When the male die and the female die are made of CrWMn materials with the hardness of HRC 55-60, the strength of the CrWMn materials can meet the product molding requirement.
Further, in a preferred embodiment of the invention, the surface roughness of the working surfaces of the punch and the die is not greater than ra0.8.
Further, in the preferred embodiment of the present invention, the first and second forms are made of 45# steel with a hardness of HRC 32-38.
The invention has the following beneficial effects:
the invention provides a forked unequal-diameter sleeve forming die, which is matched with a stamping or hydraulic device and used for forming a semicircular tube structure with different diameters and crossed arrangement, wherein a first template of a male die is provided with a material supporting plate, the material supporting plate is arranged on the periphery of the male die and is arranged in a sliding manner with the first template, so that a supporting effect is exerted on a flat blank in the forming process, a material blocking pin on the material supporting plate further fixes the flat blank, the flat blank is prevented from shifting, and the material supporting plate can push out a product after the forming is finished.
Drawings
FIG. 1 is a schematic diagram of the heated air conduit forked cannula forming process requirements;
FIG. 2 is a schematic diagram of a longitudinal cross-sectional structure of a mold for molding a forked unequal-diameter sleeve according to the present invention;
FIG. 3 is a schematic top view of the assembly of the first mold plate with the punch and retainer plate of the present invention;
FIG. 4 is a schematic bottom view of the female mold of the present invention;
fig. 5 is a schematic top view of the retainer plate of the present invention.
Wherein: 1-a first template; 11-ejecting a through hole; 2-a second template; 3-a male die; 31 — a first bump; 32-a second bump; 4-a female die; 42-a first forming groove; 43-a second forming groove; 43-let open the hole; 5-a material supporting plate; 51-a through hole; 52-stop pin.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 2, a fork-shaped unequal-diameter sleeve forming die comprises: the die comprises a first die plate 1, a second die plate 2, a male die 3 and a female die 4, wherein the first die plate 1 and the second die plate 2 are arranged oppositely, and the male die 3 and the female die 4 are respectively arranged on the first die plate 1 and the second die plate 2; the fit clearance between the male die 3 and the female die 4 is 1.07mm, in other embodiments of the invention, the fit clearance between the male die 3 and the female die 4 can also be any value between 1.07-1.1 mm, and the fit clearance is in direct proportion to the thickness of the blank to be formed. Referring to fig. 3, the male mold 3 includes: the first bump 31 with a larger diameter and the second bump 32 with a smaller diameter are obliquely arranged on one side of the first bump 31, one end of the second bump 32 is connected with the first bump 31, and the first bump 31 and the second bump 32 integrally form the working surface of the male die 3, so that the indentation on the surface of the part is avoided. The surfaces of the first bump 31 and the second bump 32 close to the female die 4 are arc surfaces, an included angle between the axis of the first bump 31 and the axis of the second bump 32 is 45 °, in this embodiment, the diameter of the arc of the upper end surface of the first bump 31 is 60mm, and the diameter of the arc of the upper end surface of the second bump 32 is 48 mm. Referring to fig. 4, the female die 4 is provided with a first forming groove 41 and a second forming groove 42 matched with the first bump 31 and the second bump 32, the first groove 41 and the second groove 42 are matched with the first bump 31 and the second bump 32 respectively, do not include the length direction thereof, but refer to the forming surface thereof, and in the present embodiment, the lengths of the first groove 41 and the second groove 42 are both greater than the lengths of the first bump 31 and the second bump 32.
Referring to fig. 5, the forming mold further includes a retainer plate 5 disposed parallel to the first mold plate 1, a through hole 51 matched with an outer contour of the male mold 3 is disposed on the retainer plate 5, the retainer plate 5 is slidably sleeved on the male mold 3 through the through hole 51, the retainer plate 5 can slide relative to the male mold 3, three material blocking pins 52 are disposed on the retainer plate 5, two material blocking pins 52 are disposed on an outer side of the first protrusion 31, and another material blocking pin 52 is disposed on an inner side of the first protrusion 31 far from one end of the second protrusion 32, so that the material blocking pins 52 can fix a blank located on one side of the first protrusion 31 better, and the female mold 4 is provided with a hole 43 matched with the material blocking pins 52. The first template 1 on the lower surface of the material supporting plate 5 is provided with an ejection through hole 11, and the setting position of the ejection through hole 11 is matched with the position of an ejection hole on the hydraulic press.
The flat plate blank suitable for the forming die in the embodiment is made of stainless steel 1Cr18Ni9Ti with the wall thickness of 1mm, antirust aluminum LF21 and the like which can be used for sheet metal forming, the male die 3 and the female die 4 are made of CrWMn, the hardness is HRC60, the surface roughness of the working surfaces of the male die 3 and the female die 4 is Ra0.8, the first die plate 1 and the second die plate 2 are made of 45# steel, and the hardness is HRC 38. In other embodiments of the present invention, the hardness of the male mold 3 and the female mold 4 can be any value between HRC 55-60, the surface roughness of the working surface of the male mold 3 and the female mold 4 can be less than ra0.8, and the hardness of the first mold plate 1 and the second mold plate 2 can be any value between HRC 32-38.
The use of the device is described below in connection with fig. 2 and 3:
clamping a mould: placing a copper sheet with the wall thickness of 1mm between the male die 3 and the female die 4, and closing the male die 3 and the female die 4; after the die assembly, the die is integrally installed on the hydraulic press, so that the first template 1 and the second template 2 can be ensured to be installed without dislocation;
the specific installation process is as follows: fixing the first template 1 on the hydraulic machine by using a pressing plate, ensuring that an ejection hole on a platform of the hydraulic machine corresponds to an ejection through hole 11 on the first template, then moving the upper platform of the hydraulic machine downwards to be in contact with the second template 2, and clamping the second template 2 at the corresponding position of the upper platform of the hydraulic machine by using the pressing plate. In this example, a 200T four-column open hydraulic press with a stretching function was used.
The working process is as follows: after the die is clamped, the die is opened, the copper sheet is taken out, the upper platform of the equipment is moved upwards to a position convenient for operation, the material supporting plate 5 is lifted to the position where the upper plane is flush with or slightly higher than the highest position of the male die 3 by using an ejection device on the equipment, a prefabricated blank is placed on the material supporting plate 5, the upper platform moves downwards, after the plane of the female die 4 is contacted with the blank on the material supporting plate 5, a certain blank pressing force is formed at the moment, and when the female die 4 and the male die 3 continue to press downwards, the molded surfaces of the female die 4 and the male die 3 are mutually limited after the blank fills gaps, so that self-alignment is realized. Meanwhile, the retainer plate 5 moves downwards along with the female die 4 until the molding is finished. After the molding is finished, the ejector force is used again to lift the retainer plate 5, so that the part attached to the male die 3 is demoulded, and a molding process is finished.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A forked sleeve forming die with unequal diameters is characterized by comprising: the die comprises a first die plate (1), a second die plate (2) and a male die (3) and a female die (4), wherein the first die plate (1) and the second die plate (2) are arranged oppositely, and the male die (3) and the female die (4) are respectively arranged on the first die plate (1) and the second die plate (2);
the male die (3) comprises: the die comprises a first bump (31) and a second bump (32), wherein the diameter of the first bump (31) is larger than that of the second bump (32), the second bump (32) is obliquely arranged on one side of the first bump (31), one end of the second bump (32) is connected with the first bump (31), and a first forming groove (41) and a second forming groove (42) which are matched with the first bump (31) and the second bump (32) are arranged on a female die (4);
the forming die further comprises a material supporting plate (5) arranged in parallel with the first die plate (1), a through hole (51) matched with the outline of the male die (3) is formed in the material supporting plate (5), and the material supporting plate (5) is slidably sleeved on the male die (3) through the through hole (51).
2. The forming die for the fork-shaped sleeves with different diameters as claimed in claim 1, wherein a plurality of material blocking pins (52) are arranged on the retainer plate (5), and a hole (43) matched with the material blocking pins (52) is formed in the female die (4).
3. The forked unequal-diameter sleeve molding die according to claim 1, wherein the first template (1) corresponding to the lower surface of the retainer plate (5) is provided with an ejection through hole (11).
4. The forked unequal-diameter sleeve forming die according to any one of claims 1 to 3, characterized in that the faces, close to the female die (4), of the first projection (31) and the second projection (32) are circular arc faces, and the included angle between the axis of the first projection (31) and the axis of the second projection (32) is 45 degrees.
5. The fork-shaped sleeve forming die with unequal diameters according to claim 4, wherein the fit clearance between the male die (3) and the female die (4) is 1.07-1.1 mm.
6. The fork-shaped sleeve forming die with unequal diameters according to claim 5, wherein the male die (3) and the female die (4) are both made of CrWMn with the hardness of HRC 55-60.
7. The fork type differential diameter sleeve forming die according to claim 5, characterized in that the surface roughness of the working surfaces of said male die (3) and said female die (4) is not more than Ra0.8.
8. The fork-shaped sleeve forming die with unequal diameters according to claim 5, wherein the first die plate (1) and the second die plate (2) are both made of 45# steel and have the hardness of HRC 32-38.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011170210.7A CN112439839A (en) | 2020-10-28 | 2020-10-28 | Forked unequal-diameter sleeve forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011170210.7A CN112439839A (en) | 2020-10-28 | 2020-10-28 | Forked unequal-diameter sleeve forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112439839A true CN112439839A (en) | 2021-03-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011170210.7A Pending CN112439839A (en) | 2020-10-28 | 2020-10-28 | Forked unequal-diameter sleeve forming die |
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| CN (1) | CN112439839A (en) |
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| CN206882533U (en) * | 2017-06-09 | 2018-01-16 | 江西江铃底盘股份有限公司 | A kind of composite die of automobile drive axle housing lid shaping typewriting |
| CN207563560U (en) * | 2017-09-26 | 2018-07-03 | 山西北方机械制造有限责任公司 | A kind of compound mould of extending |
| CN211304381U (en) * | 2019-11-18 | 2020-08-21 | 山西北方机械制造有限责任公司 | Stretching device |
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2020
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| CN1927497A (en) * | 2006-06-15 | 2007-03-14 | 兰州理工大学 | Cold stamping composite mold |
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