CN216324879U - Trimming and shape correcting composite die structure for crankshaft forge piece - Google Patents
Trimming and shape correcting composite die structure for crankshaft forge piece Download PDFInfo
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- CN216324879U CN216324879U CN202122537071.3U CN202122537071U CN216324879U CN 216324879 U CN216324879 U CN 216324879U CN 202122537071 U CN202122537071 U CN 202122537071U CN 216324879 U CN216324879 U CN 216324879U
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- crankshaft
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Abstract
The utility model provides a trimming and shape-correcting composite die structure for a crankshaft forging, which comprises an upper die seat, a lower die seat, a trimming female die, a trimming edge, a lower punch, an upper die plate and a nitrogen spring, wherein the trimming lower punch is fixedly arranged on the lower die seat, a lower half type chamber of the crankshaft forging is arranged in the trimming lower punch, and the upper plane of the trimming female die is fixedly connected with the upper die seat; the trimming female die is hollow, the trimming upper punch is arranged in the trimming female die, the upper half part chamber of the crankshaft forge piece is arranged in the trimming upper punch, and the upper die base is fixedly connected with the upper die plate; the nitrogen spring is arranged in the upper template. The composite die improves the production efficiency, reduces the complexity of die design, can be mounted on mechanical pressure equipment with a small table surface, and saves the equipment investment.
Description
Technical Field
The utility model belongs to the technical field of dies, and particularly relates to a trimming and shape correcting composite die structure for a crankshaft forge piece.
Background
Crankshafts are common components in mechanical structures. At present, the crankshaft production process is carried out by separately carrying out trimming and shape correction after forging and forming. Two forms are commonly used: firstly adopt two equipment to cut edge respectively and school shape, another adopts the equipment of wide mesa to use the modulus of continuity or install two sets of moulds and cut edge respectively and school shape and be divided into two processes, need increase equipment like this or use big mesa equipment, waste time and energy and occupy equipment, production efficiency is low. Meanwhile, the conventional compound die structure is designed to be complex by adopting a common spring or a butterfly spring. In order to solve the problems, a new composite die structure is needed to realize one process for finishing trimming and shape correction.
Disclosure of Invention
In order to solve the problems, the utility model provides a trimming and shape correcting composite die structure for a crankshaft forging, which can simultaneously finish trimming and shape correcting of the crankshaft forging and improve the production efficiency.
The technical scheme adopted by the utility model is as follows: a composite die structure for trimming and correcting a crankshaft forging comprises an upper die base, a lower die base, a trimming female die, a trimming lower punch, an trimming upper punch, an upper die plate and a nitrogen spring, wherein the upper die base and the lower die base are respectively and fixedly arranged on an upper platform and a lower platform of a press machine; the trimming female die is hollow, the trimming upper punch is arranged in the trimming female die, the upper half part chamber of the crankshaft forge piece is arranged in the trimming upper punch, and the upper die base is fixedly connected with the upper die plate; the nitrogen spring is arranged in the upper die plate, the sliding guide column is arranged in the upper die base and corresponds to the nitrogen spring in position, one end of the sliding guide column is connected with the nitrogen spring, and the other end of the sliding guide column is connected with the upper plane of the upper punch on the cutting edge.
Furthermore, during forging, the nitrogen spring compresses the upper and lower trimming punches, so that the forged piece is compressed, and trimming, bending and deformation of the forged piece are prevented.
Furthermore, the unilateral clearance between the outer side wall of the trimming lower punch and the inner side wall of the trimming female die is larger than the unilateral clearance between the outer side wall of the trimming lower punch and the inner side wall of the trimming female die.
Furthermore, the unilateral clearance of the lateral wall of side cut lower punch and the inside wall of side cut die be 1.5mm, the unilateral clearance of the lateral wall of side punch and the inside wall of side cut die is 1 mm.
Furthermore, the side wall of the lower half part of the trimming lower punch is provided with a material ejecting plate.
Furthermore, a cooling water channel is arranged in the upper template, and two sealing rings are arranged between the nitrogen spring and the cooling water.
The utility model has the beneficial effects that: the utility model utilizes the die structure provided with the nitrogen spring to complete two working procedures of trimming and sizing of the crankshaft forge piece at one time on the mechanical pressure equipment, thereby improving the production efficiency, simplifying the die structure and reducing the complexity of the die design.
Drawings
FIG. 1 is a schematic structural view of a trimming and shape-correcting die for a crankshaft forging according to the present invention;
FIG. 2 is a schematic top view of a trimming lower punch;
FIG. 3 is a schematic view of an upper platen;
Detailed Description
The utility model is described in detail below by way of example with reference to the accompanying drawings:
example 1
As shown in fig. 1-3, a trimming and shape-correcting composite die structure for a crankshaft forging comprises an upper die holder 5, a lower die holder 1, a trimming female die 3, a trimming lower punch 2, a trimming upper punch 4, an upper die plate 6 and a nitrogen spring 7, wherein the upper die holder and the lower die holder are respectively and fixedly installed on an upper platform and a lower platform of a press machine, the trimming lower punch 2 is fixedly installed on the lower die holder 1, a lower half cavity of the crankshaft forging is arranged inside the trimming lower punch 2, and the upper plane of the trimming female die 3 is fixedly connected with the upper die holder 5; the trimming female die 3 is hollow, the trimming upper punch 4 is arranged in the trimming female die 3, the upper half part type chamber of the crankshaft forge piece is arranged in the trimming upper punch 4, and the upper die base 5 is fixedly connected with the upper die plate 6; the nitrogen spring 7 is arranged in the upper template 6, the sliding guide post is arranged in the upper die base 5, the position of the sliding guide post corresponds to that of the nitrogen spring, one end of the sliding guide post is connected with the nitrogen spring 7, and the other end of the sliding guide post is connected with the upper plane of the trimming upper punch 4. During forging, the nitrogen spring 7 compresses the upper and lower trimming punches, so that the inner forged piece is compressed, and trimming, bending and deformation of the forged piece are prevented. And the side wall of the lower half part of the trimming lower punch 2 is provided with a material ejecting plate 10. The nitrogen spring 7 has an initial pressure of 5000daN and a final pressure of 8000 daN.
Wherein: the trimming lower punch 2 is provided with a lower half part type chamber of the crankshaft forge piece and is arranged on the lower die holder 1 to be used for supporting the forge piece to perform trimming and shape correcting functions, the gap between the outer wall of the trimming lower punch 2 and the single edge of the inner part of the trimming female die 3 is 1.5mm, and the gap is formed by the trimming lower punch 2.
The side cut drift 4 is equipped with first half type thorax of bent axle forging, and the unilateral clearance of the lateral wall of side drift 4 and the inside wall of side cut die 3 is 1mm, and the clearance is made by side cut upper punch 4, and side cut upper punch 4 is to bent axle forging side cut compress tightly with exert pressure when school shape, utilize the structure that the side cut, lower punch compressed tightly the forging simultaneously, can prevent forging side cut bending deformation. Meanwhile, a guide pillar 8 and a guide sleeve 9 are arranged between the upper die base and the lower die base, so that the alignment of the die in use is ensured; the trimmed burrs are ejected out through the ejector plate 10 by utilizing the lower ejection cylinder of the equipment.
The embodiment is characterized in that three positions for containing the nitrogen spring are arranged in the upper template 6, the hole diameter of the groove for installing the nitrogen spring is 0.5-1 mm larger than the outer diameter of the nitrogen spring, the bottom of the groove is required to be flat, so that the nitrogen spring can be vertically stressed, a cooling water channel 11 is further arranged in the upper template and used for cooling the nitrogen spring during working, and two sealing grooves and related sealing rings 12 are arranged.
Example 2
Procedure for use of the composite mold structure in example 1:
the first step is as follows: an upper template 6 and a lower die holder 1 are respectively arranged on an upper working platform and a lower working platform of a mechanical press, and an external cooling water source is connected into the upper template 6.
The second step is that: the mechanical press is started to lift the trimming female die 3, the crankshaft forge piece is placed on the cavity surface of the trimming lower punch 2, the mechanical press drives the trimming female die 3 to descend to cut off burrs of the crankshaft forge piece firstly, meanwhile, in the descending process of the equipment, the trimming upper punch 4 compresses the crankshaft forge piece firstly, the mechanical press continues to descend, the shape of the trimmed crankshaft forge piece is corrected by the pressure of the nitrogen spring, and trimming and shape correction are synchronously performed.
The third step: the mechanical press moves backwards, the trimming female die 3 is separated from the trimming lower punch 2 along with the rising of the mechanical press, the crankshaft forging is ejected out through the trimming upper punch 4 under the action of the nitrogen spring, the whole trimming and shape correcting process is completed, the crankshaft forging is taken out, and meanwhile, the ejection plate 10 ejects burrs.
Claims (6)
1. The utility model provides a be used for bent axle forging side cut school shape composite die structure, includes upper die base, die holder, side cut die, side cut lower punch, side cut punch, cope match-plate pattern and nitrogen spring, upper die base, die holder respectively fixed mounting on the upper and lower platform of press, its characterized in that: the lower trimming punch is fixedly arranged on the lower die base, a lower half type chamber of the crankshaft forge piece is arranged in the lower trimming punch, and the upper plane of the lower trimming die is fixedly connected with the upper die base; the trimming female die is hollow, the trimming upper punch is arranged in the trimming female die, the upper half part chamber of the crankshaft forge piece is arranged in the trimming upper punch, and the upper die base is fixedly connected with the upper die plate; the nitrogen spring is arranged in the upper die plate, the sliding guide column is arranged in the upper die base and corresponds to the nitrogen spring in position, one end of the sliding guide column is connected with the nitrogen spring, and the other end of the sliding guide column is connected with the upper plane of the upper punch on the cutting edge.
2. The trimming and sizing composite die structure for the crankshaft forge piece according to claim 1, characterized in that: during forging, the nitrogen spring compresses the upper and lower trimming punches, so that the forging is compressed.
3. The trimming and sizing composite die structure for the crankshaft forge piece according to claim 1, characterized in that: the unilateral clearance between the outer side wall of the trimming lower punch and the inner side wall of the trimming female die is larger than the unilateral clearance between the outer side wall of the trimming lower punch and the inner side wall of the trimming female die.
4. The trimming and sizing composite die structure for the crankshaft forge piece according to claim 3, wherein: the unilateral clearance of the lateral wall of side cut lower punch and the inside wall of side cut die be 1.5mm, the unilateral clearance of the lateral wall of side punch and the inside wall of side cut die is 1 mm.
5. The trimming and sizing composite die structure for the crankshaft forgings as claimed in any one of claims 1 to 4, wherein: and the side wall of the lower half part of the trimming lower punch is provided with a material ejecting plate.
6. The trimming and sizing composite die structure for the crankshaft forge piece according to claim 5, wherein: and a cooling water channel is arranged in the upper template, and two sealing rings are arranged between the nitrogen spring and the cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122537071.3U CN216324879U (en) | 2021-10-21 | 2021-10-21 | Trimming and shape correcting composite die structure for crankshaft forge piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122537071.3U CN216324879U (en) | 2021-10-21 | 2021-10-21 | Trimming and shape correcting composite die structure for crankshaft forge piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216324879U true CN216324879U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122537071.3U Active CN216324879U (en) | 2021-10-21 | 2021-10-21 | Trimming and shape correcting composite die structure for crankshaft forge piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216324879U (en) |
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2021
- 2021-10-21 CN CN202122537071.3U patent/CN216324879U/en active Active
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