CN216828460U - Combined die for forging thin-wall cylindrical forge piece - Google Patents
Combined die for forging thin-wall cylindrical forge piece Download PDFInfo
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- CN216828460U CN216828460U CN202123041988.0U CN202123041988U CN216828460U CN 216828460 U CN216828460 U CN 216828460U CN 202123041988 U CN202123041988 U CN 202123041988U CN 216828460 U CN216828460 U CN 216828460U
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Abstract
The utility model belongs to cylindric forging of forgeable piece processing field relates to a thin wall cylindric forging of forgeable piece uses assembling die. The method comprises the following steps: the forging die comprises a finish forging die and a preforging die, wherein the finish forging die comprises an upper finish forging die, a lower finish forging die and a first ejection block, the first ejection block is arranged at the bottom of the lower finish forging die, a die cavity of the upper finish forging die, the lower finish forging die and the first ejection block corresponds to the shape of a finish forging piece after die assembly, the preforging die comprises an upper preforging die, a lower preforging die and a second ejection block, the second ejection block is arranged at the bottom of the lower preforging die, a parting surface is located at 1/3-1/2 parts of the height of a prefabricated blank, and a die cavity of the preforging die corresponds to the preforging piece. The forming difficulty is reduced through the design improvement of the thin-wall cylindrical forge piece, the blank size structure is reasonably designed in the blank manufacturing process, the full deformation of all parts of the finish-forging cylindrical forge piece is ensured, the effects of refining crystal grains and improving the uniformity of the structure are achieved, the mechanical property is further improved, and the acceptance requirement of the forge piece is met.
Description
Technical Field
The utility model belongs to the technical field of cylindric forging of forgeable piece processing, a thin wall cylindric forging of forgeable piece is with assembling die is related to.
Background
In the forging process of the thin-wall cylindrical forging piece, due to the characteristics of thin walls, in the forging process, the temperature of a blank is quickly reduced, the deformation resistance is intensified, the blank is difficult to form, the deformation and recrystallization of the blank are insufficient, and the structure uniformity is difficult to control. Traditional cylindric forging design is even skin and is located the bottom, adopts the free forging cake base, and cake base tissue homogeneity is relatively not good, and the die forging adopts reverse extrusion shaping, and the shaping fire is many times, and production cycle is long and output forging tissue homogeneity is relatively poor, seriously influences the product and delivers supporting.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the combined die for forging the thin-wall cylindrical forge piece is provided to improve the mechanical property.
The technical scheme of the utility model is that:
a combined die for forging thin-wall cylindrical forgings comprises: a finish forging die and a pre-forging die, wherein,
the finish forging die comprises an upper finish forging die, a lower finish forging die and a first ejection block, wherein the first ejection block is arranged at the bottom of the lower finish forging die, a die cavity after the upper finish forging die, the lower finish forging die and the first ejection block are closed corresponds to the shape of a finish forging piece, a gap between a punch of the upper finish forging die and the first ejection block corresponds to a connecting skin part of the forging piece, L1 is H1/3-H1/2, H1 is the height of the finish forging piece, L1 is the height of a horizontal center line of the connecting skin, a boss with the diameter of A2 is arranged on the first ejection block, the height of the boss is H2, the outer diameter of the first ejection block is D1, the outer diameter of an upper die punch is B1, the inner diameter of the lower end of a lower die cavity is C3, and the inner diameter of the upper end of the lower die cavity is C1,
the preforging die comprises an upper preforging die, a lower preforging die and a second ejection block, wherein the second ejection block is arranged at the bottom of the lower preforging die, a parting surface is positioned at the position 1/3-1/2 of the height of the preforging blank, a preforging die cavity corresponds to the preforging piece, the height of the preforging die cavity is H3, the height of the parting surface from the lower end surface of the preforging die cavity is L3, the outer diameter of the parting surface is C2, the inner wall of the die cavity is in circular arc transition at the parting surface, the upper end surface of the second ejection block is provided with a boss with the diameter of A3 and the height of H3, the diameter of the bottom surface of the upper preforging die cavity is B2, the bottom surface of the lower preforging die cavity is provided with an annular groove with the inner diameter of D2, and the transition circular arc between the inner side surface and the lower end surface of the annular groove is R2, wherein H1 > H3, B2 ═ B1, C3 > C2, D2 > D2, C2-B2 < C2, R2 < 2, A2 < 2, and C2.
Further, the thickness L2 of the finish forging die leather connecting part is 30-60 mm.
Further, the outer wall of the punch of the upper finish forging die has a die-stripping slope F degrees, the inner wall of the cavity of the lower finish forging die has a die-stripping slope G degrees upwards, the joint of the upper horizontal line of the integral skin part has an upward die-stripping slope E degrees, and the die-stripping slopes have a relation F & gt E, and G & gt E.
Furthermore, an inclination angle H between the lower end face of the punch of the upper finish forging die and the horizontal line of the upper skin connecting part is 7-10 degrees, the lower horizontal line of the skin connecting part is in arc transition with the die outlet face of the lower cavity of the cylinder, and a transition fillet R1 is formed.
Further, the upper and lower demolding inclination of the pre-forging cavity is 15-20 degrees.
Furthermore, the size difference between the parting surface of the preforging die and the upper end surface of the cavity is not smaller than the maximum wall thickness of the die forging, the excircle edges of the two end surfaces of the preforging die cavity are designed to be large arcs, and the large arcs R4 and R3 are designed to be R20-60.
The utility model has the advantages that: the utility model discloses a design to thin wall cylindric forging improves and reduces the shaping degree of difficulty, at blank process rational design blank size structure, guarantees the abundant deformation of each position of finish forging cylindric forging, reaches the effect of refining crystalline grain and improving the tissue homogeneity, makes mechanical properties obtain further promotion simultaneously, satisfies the forging and checks and accepts the technical requirement.
Drawings
FIG. 1 is a schematic view of a finish forging die configuration;
FIG. 2 is a schematic view of a material segment blanking machine;
fig. 3 is a schematic diagram of a blocker die structure.
The forging die comprises an upper finish forging die 1, a lower finish forging die 2, a first ejection block 3, a connecting skin center line 4, a connecting skin upper horizontal line 5, a connecting skin lower horizontal line 6, an upper preforging die 7, a lower preforging die 8 and a second ejection block 9.
Detailed Description
The traditional forge piece design basically determines that the forming process is difficult and the control of the structure uniformity cannot be guaranteed. In the forging process of the thin-wall cylindrical forging piece, due to the characteristics of thin walls, in the forging process, the temperature of a blank is quickly reduced, the deformation resistance is intensified, the blank is difficult to form, the deformation and recrystallization of the blank are insufficient, and the structure uniformity is difficult to control. Traditional cylindric forging design is even skin and is located the bottom, adopts the free forging cake base, and cake base tissue homogeneity is relatively not good, and the die forging adopts reverse extrusion shaping, and the shaping fire is many times, and production cycle is long and output forging tissue homogeneity is relatively poor, seriously influences the product and delivers supporting. The utility model discloses a design to thin wall cylindric forging improves and reduces the shaping degree of difficulty, at blank process rational design blank size structure, guarantees the abundant deformation of each position of finish forging cylindric forging, reaches the effect of refining crystalline grain and improving the tissue homogeneity, makes mechanical properties obtain further promotion simultaneously, satisfies the forging and checks and accepts the technical requirement.
The traditional process method fails to pay attention to the requirement on tissue control, and the size structure of the preformed blank is not reasonably designed, so that the deformation of the cylindrical part has the condition that the upper end and the lower end are inconsistent, the deformation temperature difference of different parts is large, and the difference of the tissue performance state is large. In addition, according to the traditional process, the cake blank is adopted as the prefabricated blank for die forging, the cake blank production adopts a free forging mode, the deformation difference of different parts is large, the tissue difference is large, the deformation existing in the die forging is finally overlapped at poor parts, and the poor tissue state is inherited to the cylindrical die forging. The key point for solving the problem is that the die forging mode is adopted to manufacture the prefabricated blank, the tissue uniformity of the prefabricated blank is improved, and the existence of areas with poor deformation is reduced. The prefabricated blank shape design has constraint association with the cylindrical die forging in the structural dimension by combining the deformation flow condition, so that the synchronous molding of the prefabricated blank on the upper end surface and the lower end surface of the cylindrical die forging at different parts in the die forging process is ensured, and the deformation is further improved by improving the blank flow section through the die draft constraint, thereby achieving the tissue refining effect.
In order to solve the problem, the utility model provides a thin wall cylindric forging is with assembling die. Comprises a pre-forging die and a finish forging die.
1. Determining a finish forging die structure of a thin-wall cylindrical die forging according to a finish forging structure, wherein the finish forging die comprises an upper finish forging die 1, a lower finish forging die 2 and a first ejection block 3, the finish forging die is an H-shaped rotary body cavity when the finish forging die is closed, the cavity after the upper finish forging die 1, the lower finish forging die 2 and the first ejection block 3 are closed corresponds to the shape of the finish forging die, and a gap between a punch of the upper finish forging die 1 and the first ejection block 3 corresponds to a skinning part of a forging piece, wherein the gap between the punch of the upper finish forging die 1 and the first ejection block 3 corresponds to the skinning part of the forging piece, and the distance from a horizontal centerline 4 of the skinning to the bottom end is 1/3-1/2 part of the height of the finish forging piece, and has the size structure characteristics: l1 is H1/3-H1/2, L2 is 30-60 mm. The purpose is to achieve the material distribution effect, and the blank flows uniformly to the upper end surface and the lower end surface in the subsequent deformation process. Where H1 is the finish forge height, L1 is the height of the skin at the horizontal centerline 4, and L2 is the thickness of the skin. Different materials have different deformation resistances, and the thickness L2 of the connected skin after die forging forming has larger difference, so that the occupied volume of the connected skin part is different, and the materials which are distributed to the wall of a finish forging piece by subsequent die forging are different. Wherein, the outer wall of the punch of the upper finish forging die 1 has a die-stripping slope F degrees, the inner wall of the cavity of the lower finish forging die 2 has a die-stripping slope G degrees upwards, the joint of the upper horizontal line 5 of the connecting skin part has an upward die-stripping slope E degrees, the die-stripping slopes have a relation F > E, and G > E. An inclination angle H between the lower end face of the punch of the upper finish forging die 1 and the upper horizontal line 5 of the connecting skin is 7-10 degrees. The method is favorable for further improving the blank flowing, improving the uniformity of the structure, improving the flowing section of the blank, increasing the stress action and refining the structure. The die outlet surface of the outer wall of the punch of the upper finish forging die 1 is in arc transition with the inclined surface of the upper horizontal line 5 of the connecting skin. The connecting skin lower horizontal line 6 and the cylinder lower cavity die-out surface are in arc transition, and the transition fillet R1 is formed. The lower horizontal line 6 of the connecting skin is provided with a boss with the diameter of A2, and the height of the boss is h 2. The outer diameter of the first ejection block 3 is D1. The outer diameter of the punch of the upper finish forging die 1 is B1, the inner diameter of the lower end of the cavity of the lower finish forging die 2 is C3, and the inner diameter of the upper end of the cavity of the lower finish forging die 2 is C1.
2. And determining a preforging die structure according to the finish forging structure, wherein the preforging die comprises an upper preforging die 7, a lower preforging die 8 and a second ejection block 9, the preforging die is a cavity when the preforging die is closed, and a parting surface is located at 1/3-1/2 parts of the height of the preforging die and keeps harmonious matching with the finish forging as shown in figure 3. The height H3 of the pre-forging is L3 of the parting surface from the lower end surface of the pre-forging cavity. And the outer diameter of the parting surface is C2.
3. And the inner wall of the cavity at the parting surface of the preforging die is in arc transition.
4. The upper and lower demolding inclination of the pre-forging part cavity is 15-20 degrees.
5. The size difference between the parting surface of the preforging die and the upper end surface of the cavity is not less than the maximum wall thickness of the die forging.
6. The upper end face of the second ejection block 9 is provided with a boss with the diameter of A3 and the height of h3, the bottom surface of the cavity of the lower preforging die 8 is provided with an annular groove with the inner diameter of D2, and the lower end face of the boss forms a two-stage step structure, so that subsequent die forging positioning is facilitated. The diameter of the bottom surface of the cavity of the upper preforging die 7 is B2, and the transition circular arc between the inner side surface and the lower end surface of the annular groove is R2.
7. The excircle edges and corners of two end faces of the pre-forging die cavity are designed to be large arcs, and R4 and R3 are designed to be R20-60.
As shown in fig. 3, in addition to the above, the characteristics associated with the parameters of the finish forging die structure are as follows: h1 > H3, B2 ═ B1, C3 > C2, D1 > D2, C1-B1 < C2-B2, R1 < R2, a1 ═ a2 ═ A3, H1 ═ H2 ═ H3. Wherein, A1 is the diameter of the material section positioning pit (as shown in figure 2), h1 is the depth of the material section positioning pit, and the positioning function is realized through the association constraint, and the guiding and limiting functions are also realized on the deformation and the flow of the blank on the basis of front edge distribution, and further, the full deformation of all parts of the cylinder wall is ensured on the basis of back extrusion of the blank.
Claims (6)
1. A combined die for forging thin-wall cylindrical forgings is characterized by comprising: a finish forging die and a preforging die,
the finish forging die comprises an upper finish forging die, a lower finish forging die and a first ejection block, wherein the first ejection block is arranged at the bottom of the lower finish forging die, a die cavity after the upper finish forging die, the lower finish forging die and the first ejection block are closed corresponds to the shape of a finish forging piece, a gap between a punch of the upper finish forging die and the first ejection block corresponds to a connecting skin part of the forging piece, L1 is H1/3-H1/2, H1 is the height of the finish forging piece, L1 is the height of a horizontal center line of the connecting skin, a boss with the diameter of A2 is arranged on the first ejection block, the height of the boss is H2, the outer diameter of the first ejection block is D1, the outer diameter of an upper die punch is B1, the inner diameter of the lower end of a lower die cavity is C3, and the inner diameter of the upper end of the lower die cavity is C1,
the preforging die comprises an upper preforging die, a lower preforging die and a second ejection block, wherein the second ejection block is arranged at the bottom of the lower preforging die, a parting surface is positioned at the position 1/3-1/2 of the height of the preforging blank, a preforging die cavity corresponds to the preforging piece, the height of the preforging die cavity is H3, the height of the parting surface from the lower end surface of the preforging die cavity is L3, the outer diameter of the parting surface is C2, the inner wall of the die cavity is in circular arc transition at the parting surface, the upper end surface of the second ejection block is provided with a boss with the diameter of A3 and the height of H3, the diameter of the bottom surface of the upper preforging die cavity is B2, the bottom surface of the lower preforging die cavity is provided with an annular groove with the inner diameter of D2, and the transition circular arc between the inner side surface and the lower end surface of the annular groove is R2, wherein H1 > H3, B2 ═ B1, C3 > C2, D2 > D2, C2-B2 < C2, R2 < 2, A2 < 2, and C2.
2. A combined die as claimed in claim 1, in which the thickness L2 of the skin-connecting portion of the finish forging die is 30-60 mm.
3. A combined mould as claimed in claim 1, characterised in that the upper finisher punch outer wall draft angle is F °, the lower finisher cavity inner wall has a draft angle G ° upwardly, the junction with the upper horizontal line of the integral skin portion has a draft angle E ° upwardly, there is a relationship F > E between the draft angles and G > E.
4. The combination die of claim 1, wherein an inclination angle H between the lower end face of the punch of the upper finish forging die and the upper horizontal line of the connecting skin is 7-10 degrees, the lower horizontal line of the connecting skin part is in arc transition with the die-exit face of the lower cavity of the cylinder, and a transition fillet R1 is formed.
5. The combined die of claim 1, wherein the upper and lower draft angles of the pre-forging die cavity are both 15-20 °.
6. The combination die of claim 1, wherein the size difference between the parting surface of the preforging die and the upper end surface of the die cavity is not less than the maximum wall thickness of the die forging, the excircle edges of the two end surfaces of the preforging die cavity are designed to be large arcs, and the large arcs R4 and R3 are designed to be R20-60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123041988.0U CN216828460U (en) | 2021-12-06 | 2021-12-06 | Combined die for forging thin-wall cylindrical forge piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123041988.0U CN216828460U (en) | 2021-12-06 | 2021-12-06 | Combined die for forging thin-wall cylindrical forge piece |
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| Publication Number | Publication Date |
|---|---|
| CN216828460U true CN216828460U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123041988.0U Active CN216828460U (en) | 2021-12-06 | 2021-12-06 | Combined die for forging thin-wall cylindrical forge piece |
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| CN (1) | CN216828460U (en) |
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- 2021-12-06 CN CN202123041988.0U patent/CN216828460U/en active Active
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