CN113751647A - Closed clamping and pressing die and closed clamping and pressing method for die forging blank - Google Patents
Closed clamping and pressing die and closed clamping and pressing method for die forging blank Download PDFInfo
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- CN113751647A CN113751647A CN202110983564.1A CN202110983564A CN113751647A CN 113751647 A CN113751647 A CN 113751647A CN 202110983564 A CN202110983564 A CN 202110983564A CN 113751647 A CN113751647 A CN 113751647A
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- 238000003825 pressing Methods 0.000 title claims abstract description 83
- 238000005242 forging Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
A closed clamping and pressing die for die forging blank making and a closed clamping and pressing method are provided, the closed clamping and pressing die comprises an upper die and a lower die, the upper die is provided with an upper groove, the lower die is provided with a lower groove, the bottom of the lower groove is provided with a sunken V-shaped structural groove, and the opening shape of the V-shaped structural groove is matched with one end of a blank obtained by one-time clamping and pressing in the direction of a major axis of an elliptic section of the blank; in the closed type blank clamping and pressing method, after a primary clamping and pressing process, the long shaft of the obtained primary clamping and pressing blank is rotated by 90 degrees, so that one shaft end of the long shaft is clamped in the V-shaped structure groove of the lower groove, and in the upper die mold closing process, the other shaft end of the long shaft of the primary clamping and pressing blank is tightly pressed by the top surface of the upper groove or the V-shaped structure groove in the upper groove clamps the other shaft end of the long shaft of the primary clamping and pressing blank, so that secondary clamping and pressing forming are completed. The invention does not need the auxiliary clamping of the clamp to the blank in the clamping and pressing deformation process, and the deformation process is stable.
Description
Technical Field
The invention belongs to the field of design of forging dies, and relates to a closed clamping and pressing die and a closed clamping and pressing method for die forging and blank making.
Background
The blocking and pressing blank manufacturing step is an essential blank manufacturing step for forming a plurality of die forging pieces, wherein closed blocking and pressing are more beneficial to extension of the length of a blocking and pressing part, the shape and the length of a blank are changed, and the shape of the blank is more consistent with that of a forging piece, so that the forming utilization rate of materials is improved, the forming force and the energy consumption of equipment are reduced, and the service life of a die is prolonged.
The defects of the existing closed type clamping and pressing blank-forming groove structural design are as follows: if carry out the card and press the operation once, the blank card presses the horizontal range extension of position obvious, and length direction exhibition length is less, and the requirement is difficult to satisfy to the longer system base of this position requirement extension, if carry out secondary card and press the operation, be about to the blank along the axis rotation card that carries out once more after 90 degrees in order to obtain bigger length extension volume, then there is following problem: firstly, the blank is the first card after pressing, and the blank cross section becomes the ellipse, and the major axis is the horizontal direction, and after rotatory 90 degrees, the major axis is the vertical direction, and the blank is difficult to stably arrange the card in and presses the type groove, and the secondary card is pressed the process and is required to clamp the centre gripping blank and operate, if the unsuitable centre gripping blank of mould structure then is difficult to carry out the secondary card and presses. Secondly, if the first clamping pressure reduction amount is large, the deformation is unstable during the second clamping pressure, the blank is easy to slide obliquely, the clamp is difficult to stabilize the blank, and the second clamping pressure operation cannot be carried out. If the secondary clamping is separated from the auxiliary operation of the clamp, the primary clamping pressing amount is required to be small so that the blank is stably placed in the clamping pressing type groove during the secondary clamping pressing, and the mode is difficult to obtain larger length extension amount.
Disclosure of Invention
The invention aims to provide a closed clamping and pressing die for die forging blank making and a closed clamping and pressing method, which realize stable secondary clamping and pressing operation of large reduction of a closed clamping and pressing blank, do not need auxiliary clamping of a clamp on the blank in the clamping and pressing deformation process, and have stable deformation process.
In order to achieve the purpose, the invention adopts the technical scheme that: the closed clamping and pressing mold for die forging blank includes one upper mold with upper slot and one lower mold with lower slot, and one notched V-shaped slot in the bottom of the lower slot and with opening matching with the end of the blank in the direction of the long axis.
Alternatively, the top of the upper shaped groove is provided with a concave V-shaped structural groove, the opening shape of the V-shaped structural groove is matched with the other end of the blank obtained by one-time clamping and pressing in the major axis direction of the elliptic section of the blank, and the two V-shaped structural grooves are arranged oppositely up and down.
The opening angle of the V-shaped structure groove is 60-100 degrees, and the depth of the V-shaped structure groove is 8-15% of the length of the long axis of the blank obtained by one-time clamping and pressing.
The opening angle of the V-shaped structural groove is 100-140 degrees, and the depth is 4-8% of the length of the long axis of the blank obtained by one-time clamping and pressing.
A closed card pressing blank method, said method utilizes said closed card pressing mould to go on, put raw materials blank in lower profiled groove of the lower die at first, in the movement process of closing the mould of the upper die, upper profiled groove and lower profiled groove press raw materials blank into the primary card pressing blank with oval cross-section, and form the bulge of V-arrangement structure on the underside of the major axis of the primary card pressing blank; and then the upper die is lifted, after the primary clamping blank is turned over by 90 degrees, one shaft end of the long shaft is clamped in the V-shaped structural groove of the lower groove, so that the primary clamping blank is stably erected in the lower groove, then the upper die is closed, the other shaft end of the long shaft of the primary clamping blank is tightly pressed by the top surface of the upper groove of the upper die, and the secondary clamping and pressing forming is finished by continuing closing the die, so that the secondary clamping and pressing blank is obtained.
A closed card pressing blank method, said method utilizes said closed card pressing mould to go on, put the raw materials blank in the lower profiled groove of the lower die at first, in the movement process of closing the mould of the upper die, upper profiled groove and lower profiled groove squeeze the raw materials blank into the primary card pressing blank with oval cross-section; and then the upper die is lifted, after the primary clamping blank is turned over by 90 degrees, one shaft end of the long shaft is clamped in the V-shaped structure groove of the lower groove, so that the primary clamping blank is stably erected in the lower groove, then the upper die is closed, the other shaft end of the long shaft of the primary clamping blank is clamped by the V-shaped structure groove of the upper groove, and secondary clamping and pressing forming is continuously completed by closing the die, so that the secondary clamping and pressing blank is obtained.
The V-shaped structural groove refers to a groove with a V-shaped cross section.
The invention has the beneficial effects that: on the basis of a conventional closed clamping and pressing type groove, a V-shaped structural groove for secondary clamping and pressing positioning and blank stabilizing is further added in the lower groove or the upper and lower grooves, so that the effects of positioning the blank and stabilizing the blank in the groove are achieved, the clamping operation of a clamp in the forming process is avoided, and the technological appeal of secondary clamping and pressing after large-pressing-amount clamping and pressing is met.
The invention realizes the secondary clamping and pressing forming with large pressing amount, obtains larger extension amount, improves the blank making efficiency, improves the forming utilization rate of materials, and is particularly suitable for the blank making requirement of the forged piece with the dumbbell-shaped structure.
For the blank making process with small pressing amount, the invention also provides a pointed simple die structure, and the blank can be positioned and stabilized to meet the stable forming requirement of secondary clamping and pressing.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the lower die of FIG. 1;
FIG. 3 is a cross-sectional view A-A of the mold of FIG. 1 at the end of the first chucking of the present invention;
FIG. 4 is a sectional view A-A of the mold of FIG. 1 in a second chucking start condition according to the present invention;
the labels in the figure are: 1. the die comprises a lower die, 2, an upper die, 3, a first V-shaped structure groove, 4, a second V-shaped structure groove, 5, a lower die groove, 6, an upper die groove and 7, and a primary clamping blank.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the invention is not limited thereto.
Example 1: referring to the attached drawings 1 and 2, the closed clamping and pressing die for die forging blank making is used for making a blank of a forging with a dumbbell-shaped structure and comprises an upper die 2 and a lower die 1, wherein the upper die 2 is provided with an upper groove 6, the lower die 1 is provided with a lower groove 5, the upper die 2 and the lower die 1 are female dies, and after the lower die 1 and the upper die 2 are closed, the upper groove 6 and the lower groove 5 are matched to form a cavity for blank forming.
The lower mould 1 lower mould 5 middle parts in the type groove be equipped with sunken first V-arrangement structural groove 3, go up the 6 middle parts in the type groove of going up of mould 2 and be equipped with sunken second V-arrangement structural groove 4, first V-arrangement structural groove 3 and second V-arrangement structural groove 4 are used for pressing blank 7 to the card once and fix a position so that the second card presses the base. After the primary blank clamping and pressing, the obtained primary blank clamping and pressing 7 is in an oval shape in cross section, and has a long axis and a short axis, wherein the long axis is in a horizontal state; when the second blank clamping and pressing is carried out, the first blank clamping and pressing 7 needs to be rotated by 90 degrees, and the long shaft is in a vertical state, so that the first V-shaped structure groove 3 and the second V-shaped structure groove 4 need to be clamped at two ends of the long shaft of the first blank clamping and pressing 7 to play the best role in positioning and stabilizing the blank in order to stabilize the blank. Based on this, the shapes of the first V-shaped structure groove 3 and the second V-shaped structure groove 4 are respectively matched with the shapes of the two ends of the long axis of the primary clamping blank 7, and in general, the opening angle of the first V-shaped structure groove 3 and the second V-shaped structure groove 4 is 60-100 degrees, and the depth is usually 8-15% of the length of the long axis of the primary clamping blank 7.
The first V-shaped structural groove 3 and the second V-shaped structural groove 4 can be shaped as shown in fig. 3 and 4, and have a V-shaped cross section.
The blank making method of the closed clamping and pressing die in the embodiment when in use is as follows: firstly, a raw material blank is placed in a lower groove 5 of a lower die 1, and during the die closing movement of an upper die 2, an upper groove 6 and the lower groove 5 extrude the raw material blank into a primary clamping blank 7 with an oval section as shown in figure 3; then the upper die 2 is lifted, after the primary clamping blank 7 is turned by 90 degrees, one shaft end of the long shaft is clamped in the first V-shaped structure groove 3 of the lower groove 5, so that the primary clamping blank 7 is stably erected in the lower groove 5, then the upper die 2 is closed, the other shaft end of the long shaft of the primary clamping blank 7 is clamped by the second V-shaped structure groove 4 of the upper groove 6, the state is shown in figure 4, and then the closing process is continued to finish secondary clamping and pressing forming, so that the secondary clamping and pressing blank is obtained.
The embodiment is directed to a die design and a blank manufacturing method under the condition of large clamping pressing amount (for example, the ratio of a long axis to a short axis in a primary clamping pressing blank is more than or equal to 2), in this case, the obtained primary clamping pressing blank 7 has a long axis which is in a thin and high shape after rotating, and the blank is not stabilized only by the first V-shaped structure groove 3 of the lower profile groove 5, so that the second V-shaped structure groove 4 is required to be arranged in the upper profile groove 6, thereby forming an upper and lower clamping state, preventing sliding inclination and deformation instability in the deformation process of the thin and high blank, stably realizing secondary clamping pressing forming of the large pressing amount, and enabling the blank to obtain large deformation and extension amount.
Example 2: in the embodiment, the die design and the blank manufacturing method aim at the condition that the clamping pressing amount is small (for example, the ratio of the long axis to the short axis in the primary clamping pressing blank is less than 2), in this case, the obtained primary clamping pressing blank 7 has a short long axis, and the blank can be stabilized by the first V-shaped structural groove 3 of the lower groove 5 after being rotated. Therefore, in this embodiment, based on embodiment 1, the second V-shaped groove 4 in the upper groove 6 is omitted, and only the first V-shaped groove 3 of the lower groove 5 is left, so that stable secondary clamping and pressing can be achieved. Moreover, when the clamping pressure is relatively small, the opening angle of the first V-shaped structure groove 3 can be increased to 140 degrees, and the depth can be reduced to 4-8% of the length of the long axis.
The blank making method of the closed clamping and pressing die in the embodiment when in use is as follows: firstly, a raw material blank is placed in a lower groove 5 of a lower die 1, and the upper groove 6 and the lower groove 5 extrude the raw material blank into a primary clamping blank 7 with an oval section in the die closing movement process of an upper die 2; and then the upper die 2 is lifted, after the primary clamping blank 7 is turned by 90 degrees, one shaft end of the long shaft is clamped in the first V-shaped structure groove 3 of the lower groove 5, so that the primary clamping blank 7 is stably erected in the lower groove 5, then the upper die 2 is closed, the top surface of the upper groove 6 of the upper die 2 is used for pressing the other shaft end of the long shaft of the primary clamping blank 7, and the closing is continued to finish secondary clamping and pressing forming, so that the secondary clamping blank is obtained.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the specific embodiments of the present invention can be modified or substituted with equivalents with reference to the above embodiments, and any modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims to be appended.
Claims (6)
1. The utility model provides a closed card of die forging base presses mould, includes mould and lower mould, goes up the mould and is equipped with type groove, and the lower mould is equipped with down type groove, its characterized in that: the bottom of the lower groove is provided with a concave V-shaped structural groove, and the opening shape of the V-shaped structural groove is matched with one end of the blank obtained by primary clamping and pressing in the major axis direction of the elliptic section of the blank.
2. The closed swaging press die of claim 1, wherein: the top of the upper shaping groove is provided with a sunken V-shaped structural groove, the opening shape of the V-shaped structural groove is matched with the other end of the blank obtained by one-time clamping and pressing in the major axis direction of the elliptic section of the blank, and the two V-shaped structural grooves are oppositely arranged up and down.
3. The closed swaging press die for producing a billet according to claim 1 or 2, wherein: the opening angle of the V-shaped structure groove is 60-100 degrees, and the depth of the V-shaped structure groove is 8-15% of the length of the long axis of the blank obtained by one-time clamping and pressing.
4. The closed swaging press die for producing a billet according to claim 1 or 2, wherein: the opening angle of the V-shaped structural groove is 100-140 degrees, and the depth is 4-8% of the length of the long axis of the blank obtained by one-time clamping and pressing.
5. A closed-type chucking blank method which is characterized by being carried out by using the closed-type chucking mold as claimed in claim 1 or 4, first, placing a raw material billet in a lower-type groove of a lower mold, and extruding the raw material billet into a primary chucking blank having an elliptical cross-section by the upper-type groove and the lower-type groove during a mold closing movement of an upper mold; and then the upper die is lifted, after the primary clamping blank is turned over by 90 degrees, one shaft end of the long shaft is clamped in the V-shaped structural groove of the lower groove, so that the primary clamping blank is stably erected in the lower groove, then the upper die is closed, the other shaft end of the long shaft of the primary clamping blank is tightly pressed by the top surface of the upper groove of the upper die, and the secondary clamping and pressing forming is finished by continuing closing the die, so that the secondary clamping and pressing blank is obtained.
6. A closed-type chucking blank method which is carried out by using the closed-type chucking mold as claimed in claim 2 or 3, first, placing a raw material billet in a lower-type groove of a lower mold, and extruding the raw material billet into an elliptical primary chucking blank by the upper-type groove and the lower-type groove during a mold closing movement of an upper mold; and then the upper die is lifted, after the primary clamping blank is turned over by 90 degrees, one shaft end of the long shaft is clamped in the V-shaped structure groove of the lower groove, so that the primary clamping blank is stably erected in the lower groove, then the upper die is closed, the other shaft end of the long shaft of the primary clamping blank is clamped by the V-shaped structure groove of the upper groove, and secondary clamping and pressing forming is continuously completed by closing the die, so that the secondary clamping and pressing blank is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110983564.1A CN113751647A (en) | 2021-08-25 | 2021-08-25 | Closed clamping and pressing die and closed clamping and pressing method for die forging blank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110983564.1A CN113751647A (en) | 2021-08-25 | 2021-08-25 | Closed clamping and pressing die and closed clamping and pressing method for die forging blank |
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| CN113751647A true CN113751647A (en) | 2021-12-07 |
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| CN202110983564.1A Pending CN113751647A (en) | 2021-08-25 | 2021-08-25 | Closed clamping and pressing die and closed clamping and pressing method for die forging blank |
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| CN213888025U (en) * | 2020-12-04 | 2021-08-06 | 中国第一重型机械股份公司 | Mould for closed upsetting of initial blank for additive blank manufacturing |
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2021
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| CN202037288U (en) * | 2011-05-04 | 2011-11-16 | 辽宁五一八内燃机配件有限公司 | Roll forging mold of roll forging machine |
| US20170297080A1 (en) * | 2014-09-01 | 2017-10-19 | Hitachi Metals Mmc Superalloy, Ltd. | Ring molded article manufacturing method |
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