Shaping die of engine balance shaft

Abstract

The utility model discloses a shaping die for an engine balance shaft. The shaping die comprises a rack; a first shaping lower cavity and a second shaping lower cavity are formed in the top surface of the lower die holder; a first shaping upper cavity and a second shaping upper cavity are formed in the bottom surface of the upper die base, the structure and the size of the first shaping upper cavity are the same as those of the second shaping lower cavity, and the structure and the size of the second shaping upper cavity are the same as those of the first shaping lower cavity; and a die assembly. In the reshaping die for the engine balance shaft, the first reshaping upper cavity and the first reshaping lower cavity as well as the second reshaping upper cavity and the second reshaping upper cavity can be simultaneously and respectively combined to form two reshaping cavities, the first reshaping upper cavity and the second reshaping lower cavity are the same in structural size, and the first reshaping lower cavity and the second reshaping upper cavity are the same in structural size; by means of the arrangement, the blanks are shaped twice, the placing angles of the blanks are different, the blanks can be evenly distributed in the shaping cavity, the blanks are evenly formed, defects are reduced, the unevenness is reduced, and then the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of balance shaft shaping technology, and in particular to a shaping mold for an engine balance shaft. Background Technology

[0002] The engine balance shaft is an important component of a car engine. It uses an eccentric weight mounted on the shaft to generate a counter-vibration force as the eccentric weight rotates with the shaft, thereby achieving a good balance effect for the engine and reducing engine vibration. Therefore, the engine balance shaft is of great significance for improving engine balance, reducing vibration and noise, and improving driving comfort.

[0003] like Figure 1 As shown, the main structure of the balance shaft includes a rotating shaft 101 and two balance blocks 102. The two balance blocks 102 are fan-shaped and adjacent to both ends of the rotating shaft 101, with the two balance blocks 102 located on both sides of the rotating shaft 101. In the prior art, when the blank 10 is shaped using a forming mold, the design is mainly based on the cavity design of the mold cavity and the material design of the blank 10. Usually, in order to ensure the dimensional accuracy of the shaped product, the cavity size of the mold is slightly larger than the actual size of the product to compensate for material shrinkage. Because the cavity size of the mold is slightly larger than the actual product, during the forming process, some cavity walls cannot fully act on the blank 10, resulting in a large difference in the pressure on different parts of the blank 10. The blank 10 is unevenly distributed in the mold cavity, affecting the strength and rigidity of the final product. At the same time, the surface of the blank 10 cannot be compacted, resulting in certain defects and unevenness on the surface of the blank 10.

[0004] Therefore, it is necessary to improve the existing shaping molds for engine balance shafts. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a forming mold for engine balance shafts that improves material distribution uniformity, reduces defects, and lowers unevenness to improve forming quality.

[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a forming mold for an engine balance shaft, comprising:

[0007] frame;

[0008] The lower mold base is fixed on the machine frame, and the top surface of the lower mold base is provided with a first shaping lower cavity and a second shaping lower cavity;

[0009] An upper die seat is arranged above the lower die seat, and the bottom surface of the upper die seat is provided with a first shaping upper cavity and a second shaping upper cavity. The first shaping upper cavity is opposite to the first shaping lower cavity and has the same structure and size as the second shaping lower cavity. The second shaping upper cavity is opposite to the second shaping lower cavity and has the same structure and size as the first shaping lower cavity.

[0010] A clamping assembly is arranged on the frame and drives the upper die seat to move between a clamping station and a parting station in the vertical direction. In the clamping station, the first shaping upper cavity and the first shaping lower cavity and the second shaping upper cavity and the second shaping lower cavity are combined to form a shaping cavity. In the parting station, a gap is arranged between the upper die seat and the lower die seat for placing and taking out the blank.

[0011] Preferably, in order to promote the uniformity of the material distribution in the shaping process, the depths of the first shaping upper cavity, the second shaping upper cavity, the first shaping lower cavity and the second shaping lower cavity are consistent.

[0012] Preferably, in order to facilitate the maintenance and replacement of the lower die seat and the upper die seat, the lower die seat is detachably arranged on the frame, and the upper die seat is detachably arranged on the output end of the clamping assembly.

[0013] Preferably, in order to realize the convenient detachable connection between the lower die seat and the frame and between the upper die seat and the output end of the clamping assembly, the lower die seat and the upper die seat are connected with the frame and the output end of the clamping assembly respectively by first bolts.

[0014] Preferably, in order to ensure the accurate positioning of the lower die seat and the upper die seat, thereby ensuring that they can be accurately clamped and improving the shaping quality, a lower positioning member is arranged on the frame and used for positioning the horizontal position of the lower die seat, and an upper positioning member is arranged on the output end of the clamping assembly and used for positioning the horizontal position of the upper die seat.

[0015] Preferably, in order to realize the accurate positioning of the lower die seat and the upper die seat, the lower positioning member includes a lower positioning frame, and the circumferential inner wall of the positioning frame is sealingly attached to the circumferential outer edge of the lower die seat. The upper positioning member includes an upper positioning frame, and the circumferential inner wall of the upper positioning frame is sealingly attached to the circumferential outer edge of the upper die seat.

[0016] Preferably, in order to facilitate maintenance, reduce replacement maintenance cost, the upper die holder and the lower die holder each comprise a first unit die and a second unit die connected detachably, the first shaping upper cavity and the second shaping upper cavity are arranged on the bottom surface of the first unit die and the second unit die respectively in the upper die holder, and the first shaping lower cavity and the second shaping lower cavity are arranged on the top surface of the second unit die and the first unit die respectively in the lower die holder.

[0017] Preferably, in order to facilitate quick detachable connection between the first unit die and the second unit die, an assembling strip is arranged between the first unit die and the second unit die, and the assembling strip is connected with the first unit die and the second unit die through a second bolt.

[0018] Preferably, in order to ensure compactness of the device structure, the two ends of the first unit die and the second unit die are flush, the parting surface of the first unit die and the parting surface of the second unit die are located on the same horizontal plane, and the first unit die and the second unit die are attached to each other.

[0019] Preferably, in order to further ensure compactness of the device structure, an embedding groove is arranged on the first unit die and the second unit die, and the embedding groove of the first unit die and the embedding groove of the second unit die are communicated to form an assembling channel accommodating the assembling strip and the second bolt.

[0020] In summary, compared with the prior art, the first shaping upper cavity and the first shaping lower cavity, the second shaping upper cavity and the second shaping lower cavity can be combined to form two shaping cavities respectively, the structure size of the first shaping upper cavity and the second shaping lower cavity is the same, the structure size of the first shaping lower cavity and the second shaping upper cavity is the same, the blank is shaped twice, the placement angle of the blank is different, the blank material is evenly distributed in the shaping cavity, the blank is shaped uniformly, defects are reduced and unevenness is reduced, and thus the product quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the prior art balance shaft and the blank;

[0022] Figure 2 is a structural schematic view of the utility model;

[0023] Figure 3 is an exploded schematic view of Figure 2 ;

[0024] Figure 4 is a connection structure schematic view of the upper die holder and the upper positioning member of the utility model;

[0025] Figure 5 is an exploded schematic view of Figure 4 ;

[0026] Figure 6 is the structure diagram of the lower die seat of the utility model;

[0027] Figure 7 is Figure 6 the schematic diagram of explosion;

[0028] In the figure: 1, rack; 11, base; 12, support column; 13, top plate; 14, first bolt; 15, lower positioning piece; 151, lower positioning frame; 152, lower base plate; 2, lower die seat; 21, first shaping lower cavity; 22, second shaping lower cavity; 3, upper die seat; 31, first shaping upper cavity; 32, second shaping upper cavity; 4, die clamping assembly; 41, upper positioning piece; 411, upper positioning frame; 412, upper pressing plate; 5, first unit die; 6, second unit die; 7, assembling strip; 8, embedding groove; 9, second bolt; 10, blank; 101, rotating shaft; 102, balance block. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model are further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0030] As Figures 2-7 shown, the utility model discloses a shaping die of engine balance shaft, comprising:

[0031] Rack 1;

[0032] Lower die seat 2, lower die seat 2 is fixed on rack 1, and the top surface of lower die seat 2 is provided with first shaping lower cavity 21 and second shaping lower cavity 22;

[0033] Upper die seat 3, upper die seat 3 is arranged directly above lower die seat 2, and the bottom surface of upper die seat 3 is provided with first shaping upper cavity 31 and second shaping upper cavity 32;First shaping upper cavity 31 is directly opposite first shaping lower cavity 21 and has the same structure and size as second shaping lower cavity 22, and second shaping upper cavity 32 is directly opposite second shaping lower cavity 22 and has the same structure and size as first shaping lower cavity 21;

[0034] Die clamping assembly 4, die clamping assembly 4 is arranged on rack 1, and die clamping assembly 4 drives upper die seat 3 to move between die clamping station and parting station along the vertical direction;When in die clamping station, first shaping upper cavity 31 and first shaping lower cavity 21, second shaping upper cavity 32 and second shaping lower cavity 32 are combined to form shaping cavity;When in parting station, the gap for placing and taking out blank 10 is arranged between upper die seat 3 and lower die seat 2.

[0035] The shaping die is used, first, the mold assembly 4 adjusts the upper die seat 3 to the mold opening position, the blank 10 is placed in the first shaping lower cavity 21 of the lower die seat 2, and then the mold assembly 4 adjusts the upper die seat 3 to the mold closing position, so that the upper die seat 3 and the lower die seat 2 are closed, the first shaping upper cavity 31 of the upper die seat 3 and the first shaping lower cavity 21 of the lower die seat 2 combine to form a shaping cavity, and the blank 10 is shaped; then, the mold assembly 4 adjusts the upper die seat 3 to the mold opening position, the blank 10 after the first shaping in the first shaping lower cavity 21 is taken out, then the blank 10 is rotated by half a circle around the blank 10 itself, the direction of the blank 10 is adjusted, and then the blank 10 is placed in the second shaping lower cavity 22, the mold assembly 4 is started, the upper die seat 3 and the lower die seat 2 are closed, the second shaping upper cavity 32 and the second shaping lower cavity 22 combine to form a shaping cavity, and the blank 10 is shaped again.

[0036] In the above two shaping processes, the placing angles of the blank 10 are different, so that the shaping cavities formed by the combination of the first shaping upper cavity 31 and the first shaping lower cavity 21 and the combination of the second shaping upper cavity 32 and the second shaping lower cavity 22 can act on different positions of the blank 10, ensure that the blank 10 is finally uniformly distributed in the shaping cavity, so that the blank 10 material is uniformly distributed, and finally improve the strength and rigidity of the shaped product, and through two mold closing, the surface of the blank 10 can be compacted, the defects and unevenness of the surface of the blank 10 are reduced, and the surface quality of the final engine balance shaft product is improved.

[0037] Further improvement is that the depths of the first shaping upper cavity 31, the second shaping upper cavity 32, the first shaping lower cavity 21 and the second shaping lower cavity 22 are consistent. In this way, it is ensured that uniform and consistent shaping forces can be applied to the upper and lower parts of the blank 10 during shaping, the uniformity of the shaped material distribution of the product is ensured, and the shaping quality of the product is improved.

[0038] Further improvement is that the lower die seat 2 is detachably arranged on the rack 1, and the upper die seat 3 is detachably arranged on the output end of the mold closing assembly 4.

[0039] After adopting the design, the lower die seat 2 and the upper die seat 3 can be conveniently taken out for cleaning, replacement and other maintenance operations.

[0040] Further improvement is that the lower die seat 2 and the upper die seat 3 are connected with the rack 1 and the output end of the die assembly 4 respectively through the first bolt 14; the base 11 is provided with a lower positioning piece 15, the lower positioning piece 15 is used for positioning the horizontal position of the lower die seat 2, and the output end of the die assembly 4 is provided with an upper positioning piece 41, the upper positioning piece 41 is used for positioning the horizontal position of the upper die seat 3; the lower positioning piece 15 comprises a lower positioning frame 151, and the circumferential inner wall of the positioning frame is sealingly attached to the circumferential outer edge of the lower die seat 2; the upper positioning piece 41 comprises an upper positioning frame 411, and the circumferential inner wall of the upper positioning frame 411 is sealingly attached to the circumferential outer edge of the upper die seat 3.

[0041] Specifically, in the utility model, the rack 1 comprises a horizontal rectangular plate-shaped base 11, the four corners of the base 11 are fixedly connected with a horizontal top plate 13 through a support column 12, the die assembly 4 is a vertical downward hydraulic cylinder, the cylinder barrel of the hydraulic cylinder is downward and fixed below the top plate 13, and the piston rod extends downward.

[0042] The lower positioning piece 15 comprises a rectangular lower positioning frame 151 and a lower base plate 152 fixed between the bottom of the lower positioning frame 151 and the top surface of the base 11, the side wall of the lower positioning frame 151 is detachably connected with the lower die seat 2 through the first bolt 14, the circumferential outer edge of the lower die seat 2 is sealingly attached to the circumferential inner wall of the lower positioning frame 151, and the bottom surface of the lower die seat 2 is attached to the top surface of the lower base plate 152, so that the accurate installation position of the lower die seat 2 on the rack 1 is ensured.

[0043] The upper positioning piece 41 comprises a horizontal upper pressing plate 412 and an upper positioning frame 411 fixed below the upper pressing plate 412, the side wall of the upper positioning frame 411 is detachably connected with the upper die seat 3 through the first bolt 14, the circumferential outer edge of the upper die seat 3 is sealingly attached to the circumferential inner wall of the upper positioning frame 411, and the top surface of the upper die seat 3 is attached to the bottom surface of the upper pressing plate 412, so that the installation accuracy of the upper die seat 3 on the output end of the die assembly 4 is ensured.

[0044] Further improvement is that the four corners of the upper die seat 3 and the lower die seat 2 are sealingly sleeved outside the four support columns 12, so that after the die assembly 4 operates, the upper positioning piece 41 can drive the upper die seat 3 to move in the vertical direction, and the accurate butt joint of the upper die seat 3 and the lower die seat 2 is ensured.

[0045] Further improvement is that the upper die seat 3 and the lower die seat 2 all comprise a first unit die 5 and a second unit die 6 which are detachably connected, in the upper die seat 3, the first shaping upper cavity 31 and the second shaping upper cavity 32 are arranged on the bottom surface of the first unit die 5 and the bottom surface of the second unit die 6 respectively, and on the lower die seat 2, the first shaping lower cavity 21 and the second shaping lower cavity 22 are arranged on the top surface of the second unit die 6 and the top surface of the first unit die 5 respectively.

[0046] After the structure is used, the upper die seat 3 and the lower die seat 2 are the same in structure, are combined by the first unit die 5 and the second unit die 6 which are detachably connected, when being maintained and replaced, the first unit die 5 or the second unit die 6 can be replaced individually, the structural precision of the first shaping lower cavity 21, the first shaping upper cavity 31, the second shaping lower cavity 22 and the second shaping upper cavity 32 is ensured, and then the precision of the final blank 10 after shaping is ensured, when one of the components is damaged, the damaged component only needs to be disassembled and replaced, the replacement of the whole upper die seat 3 or the whole lower die seat 2 is avoided, and the maintenance cost is reduced.

[0047] Further improvement is that the first unit die 5 and the second unit die 6 are provided with an assembly strip 7, the assembly strip 7 is connected with the first unit die 5 and the second unit die 6 through the second bolt 9; the two ends of the first unit die 5 and the second unit die 6 are flush, the parting surface of the first unit die 5 and the parting surface of the second unit die 6 are located on the same horizontal plane, the first unit die 5 and the second unit die are attached; the first unit die 5 and the second unit die 6 are provided with an embedding groove 8, the embedding groove 8 of the first unit die 5 and the embedding groove 8 of the second unit die 6 are communicated to form an assembly channel for accommodating the assembly strip 7 and the second bolt 9.

[0048] In the utility model, the first unit die 5 and the second unit die 6 are both cuboids, and the length, width and height of the first unit die 5 are the same as the length, width and height of the second unit die 6, the two ends of the first unit die 5 and the second unit die 6 are provided with the embedding groove 8, the length direction of the embedding groove 8 is consistent with the width direction of the first unit die 5 and the second unit die 6, and the embedding groove 8 is a through groove, after the first unit die 5 and the second unit die 6 are assembled, the assembly strip 7 is put into the embedding groove 8 of the first unit die 5 and the second unit die 6, and then the second bolt 9 is screwed on the assembly strip 7, so that the first unit die 5 and the second unit die 6 are spliced, the first unit die 5 and the second unit die 6 are integrated, when the parting surface of the first unit die 5 and the second unit die 6 is the top surface, the first unit die 5 and the second unit die 6 are combined to form the lower die seat 2, otherwise, when the parting surface of the first unit die 5 and the second unit die 6 is the bottom surface, the first unit die 5 and the second unit die 6 are combined to form the upper die seat 3, so that the orientation of the first unit die 5 and the second unit die 6 can be adjusted according to actual needs, and the first bolt 14 and the lower positioning piece 15 or the upper positioning piece 41 are connected, the assembly of the shaping die is completed, and the splicing is more convenient and fast.

[0049] The preferred embodiments of the utility model are described above, and it should be noted that, for ordinary skilled persons in the technical field, some improvements and decorations can be made without departing from the technical principles of the utility model, and these improvements and decorations should also be regarded as the protection scope of the utility model.

Claims

1. An engine balance shaft sizing die characterized by, The utility model relates to a moulding machine, including: Frame (1); Lower die holder (2), lower die holder (2) is fixed on frame (1), the top of lower die holder (2) is provided with first shaping lower cavity (21) and second shaping lower cavity (22); Upper die holder (3), upper die holder (3) is set up in the just above lower die holder (2), the bottom of upper die holder (3) is provided with first shaping upper cavity (31) and second shaping upper cavity (32), first shaping upper cavity (31) is opposite first shaping lower cavity (21) and the structure and size are same with the structure and size of second shaping lower cavity (22), second shaping upper cavity (32) is opposite second shaping lower cavity (22) and the structure and size are same with the structure and size of first shaping lower cavity (21); Mould closing assembly (4), mould closing assembly (4) is set up on frame (1), mould closing assembly (4) drives upper die holder (3) and moves between mould closing station and mould parting station along vertical direction, mould closing station, first shaping upper cavity (31) and first shaping lower cavity (21), second shaping upper cavity (32) and second shaping upper cavity (32) are all combined to form shaping cavity;Mould parting station, the clearance for placing and taking out blank is provided between upper die holder (3) and lower die holder (2).

2. A sizing die for an engine counter shaft as defined in claim 1, characterized in that: The depth of first shaping upper cavity (31), second shaping upper cavity (32), first shaping lower cavity (21) and second shaping lower cavity (22) is consistent.

3. The sizing die for an engine counter shaft as set forth in claim 1, characterized in that: Lower die holder (2) can be detachably set up on frame (1), and upper die holder (3) can be detachably set up on the output end of mould closing assembly (4).

4. A sizing die for an engine counter shaft as defined in claim 3, characterized in that: Lower die holder (2) and upper die holder (3) are connected with frame (1) and the output end of mould closing assembly (4) respectively by first bolt (14).

5. The sizing die for an engine counter shaft as set forth in claim 3, characterized in that: Lower positioning member (15) is arranged on frame (1), and is used for positioning the horizontal position of lower die holder (2), and the output end of mould closing assembly (4) is provided with upper positioning member (41), and upper positioning member (41) is used for positioning the horizontal position of upper die holder (3).

6. A sizing die for an engine counter shaft as defined in claim 5 wherein: Lower positioning member (15) includes lower positioning frame (151), and the circumferential inner wall of positioning frame is sealingly attached to the circumferential outer edge of lower die holder (2), and upper positioning member (41) includes upper positioning frame (411), and the circumferential inner wall of upper positioning frame (411) is sealingly attached to the circumferential outer edge of upper die holder (3).

7. The trim die for an engine counter shaft as set forth in claim 3, characterized by: Upper die holder (3) and lower die holder (2) all include first unit die (5) and second unit die (6) that can be detachably connected, in upper die holder (3), first shaping upper cavity (31) and second shaping upper cavity (32) are arranged on the bottom surface of first unit die (5) and the bottom surface of second unit die (6) respectively, in lower die holder (2), first shaping lower cavity (21) and second shaping lower cavity (22) are arranged on the top surface of second unit die (6) and the top surface of first unit die (5) respectively.

8. A sizing die for an engine counter shaft as defined in claim 7, characterized by: An assembling strip (7) is arranged between the first unit mold (5) and the second unit mold (6), and the assembling strip (7) is connected with the first unit mold (5) and the second unit mold (6) through a second bolt (9).

9. A sizing die for an engine counter shaft as defined in claim 8, characterized in that: The first unit mold (5) is flush with both ends of the second unit mold (6), the parting surface of the first unit mold (5) and the parting surface of the second unit mold (6) are located in the same horizontal plane, and the first unit mold (5) is attached to the second unit mold.

10. The sizing die for an engine counter shaft as set forth in claim 8, characterized in that: The first unit mold (5) and the second unit mold (6) are both provided with embedding grooves (8), the embedding grooves (8) of the first unit mold (5) and the embedding grooves (8) of the second unit mold (6) are communicated to form an assembling channel for accommodating the assembling strip (7) and the second bolt (9).

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