A high-precision balancing shaft trimming die with an identification boss

Abstract

The utility model discloses a high accuracy's shaping mould of balance axle of identification boss, include: lower shaping mould, including lower mould base, support piece and telescopic unit, be provided with the accommodation recess on lower mould base, support piece is used for supporting blank and is positioned blank radially, and the bottom end station of support piece sliding path is shaping station, and the top surface of support piece and the top surface of lower mould base enclose and form lower shaping cavity under shaping station, upper shaping mould, top surface is provided with upper shaping cavity, drive assembly drives lower shaping mould and upper shaping mould closes mould and divides the mould. The shaping mould of balance axle of identification boss utilizes support piece to support and position blank, makes the mark on blank downwardly opposite accommodation recess, moves down to shaping station through telescopic unit and drives support piece, guarantees the mark to enter the accommodation recess in the while avoiding the mark and lower mould base to produce knock and wear, guarantees the shaping integrity of mark after shaping, promotes shaping accuracy, and reduces the wear and tear of lower mould base, prolongs the life of mould.

Description

Technical Field

[0001] This utility model relates to the field of balance shaft shaping technology, and in particular to a high-precision shaping mold for a balance shaft with a marked boss. Background Technology

[0002] During the production of engine balance shafts, to facilitate the differentiation of different product types, a certain shape of marking protrusions (also known as marking protrusions or process marks) is usually formed on the surface of the blank through forging during the forging process. Figure 1 As shown, after forging is completed, the flash and burrs around the billet are removed by trimming. Then the billet is shaped by applying pressure to the billet through the shaping die to force it to fit into the shaping die cavity, so as to achieve the designed dimensional tolerances and surface roughness.

[0003] like Figure 2 and Figure 3 As shown, for the same as Figure 1 The forming mold used in the balance shaft shown mainly includes a lower forming mold, an upper forming mold, and a drive device for driving the lower forming mold, the upper forming mold to close and separate. In order to facilitate gravity-assisted metal filling and reduce reverse stress concentration, the bottom of the lower forming cavity of the lower forming mold is usually provided with a receiving recess to accommodate the marking boss during the forming process. During the forming process, the marking boss on the blank is facing downward. After maintaining this posture on the lower forming mold, the marking boss on the blank is located in the receiving recess. The upper forming mold and the lower forming mold are driven by the drive component to close and form the blank, thus completing the forming operation.

[0004] However, during the aforementioned shaping process, because the marking protrusion faces downwards, it is obscured by the lower shaping mold when the mold is closed, creating a visual obstruction. Operators cannot directly observe the relative position of the marking protrusion and the receiving recess, meaning it cannot be guaranteed that the marking protrusion is directly above the receiving recess. During the shaping process, the marking protrusion is excessively compressed and deformed. Furthermore, there is a slight offset when the blank is placed onto the lower shaping mold. Due to the small thickness and limited material of the marking protrusion, relative sliding friction with the cavity wall of the lower shaping mold can wear down the mold, leading to blurred and ineffective markings. Moreover, to facilitate the accommodating of the marking protrusion, the receiving recess structure is usually simple, a simple notch shape. This causes uneven stress on the marking protrusion during the shaping process, resulting in deformation, changes in the thickness of the character strokes, and distortion. This affects the clarity and integrity of the marking after shaping, reduces the shaping accuracy of the shaping mold, and in severe cases, requires rework, thus reducing production efficiency.

[0005] Therefore, it is necessary to improve the existing high-precision forming mold with marked boss balance shaft. Utility Model Content

[0006] The purpose of this invention is to overcome the defects in the existing technology and provide a high-precision forming mold with a marked boss balance shaft that improves forming accuracy, reduces rework and wear, and extends service life.

[0007] To achieve the above technical effects, the technical solution of this utility model is: a high-precision forming mold with a marked boss balance shaft, comprising: The lower forming die includes a horizontal lower die base, a support member that slides vertically on the lower die base, and a telescopic unit that drives the support member to slide. The lower die base is provided with a receiving recess for accommodating a blank mark. The support member is used to support the blank and radially position the blank so that the blank mark faces downward. The bottom station of the sliding path of the support member is a forming station. Below the forming station, the top surface of the support member and the top surface of the lower die base enclose the lower forming cavity of the lower forming die. The receiving recess is connected to the bottom of the lower forming cavity. The upper shaping mold is horizontally positioned above the lower shaping mold and has an upper shaping cavity on its top surface; The driving component drives the lower forming mold and the upper forming mold to close and separate. When the mold is closed, the lower forming cavity and the upper forming cavity surround each other to form a forming cavity. After the mold is separated, a space for loading and unloading blanks is provided between the upper forming mold and the lower forming mold.

[0008] Preferably, in order to achieve stable support and precise radial positioning of the blank, the support member includes a shaft support groove disposed at both ends of the lower mold base and a balance positioning block located between the shaft support grooves. The shaft support groove is used to support both ends of the blank, and the top surface of the balance positioning block is used to fit against the bottom of the circumferential outer edge of the balance block of the blank. The shaft support groove and the balance positioning block are fixedly connected.

[0009] Preferably, in order to achieve axial positioning of the billet and ensure that the mark on the billet can be aligned with the recess, axial positioning elements are provided at both opposite ends of the shaft support groove, and the axial positioning elements are housed in the corresponding shaft support groove.

[0010] Preferably, in order to achieve smooth and synchronous lifting and lowering movement of the shaft support groove and the balance positioning block, a frame is fixed below the lower mold base, and a sliding rod extending in the vertical direction is fixed at the bottom end of both the shaft support groove and the balance positioning block. The sliding rod is slidably connected to the frame along its own axial direction and the bottom ends are fixedly connected by a sliding plate.

[0011] Preferably, in order to facilitate the smooth lifting and lowering movement of the support, the telescopic unit includes a permanent magnet and an electromagnet distributed along the vertical direction, wherein one of the permanent magnet and the electromagnet is fixed to the frame and the other is fixed to the slide plate.

[0012] Preferably, in order to improve the shaping accuracy, the receiving recess is adapted to the markings on the blank.

[0013] Preferably, in order to facilitate the shaping of marks of different shapes and sizes, the lower mold base includes a mold base body and an insert detachably connected to the mold base body, and the receiving recess is provided on the top surface of the insert.

[0014] Preferably, in order to achieve a detachable connection between the insert and the mold base body, the mold base body is provided with an inlay through hole extending in the vertical direction, the circumferential outer edge of the insert is sealed and fitted with the inlay through hole, and the insert is inserted and fitted into the inner side of the inlay through hole.

[0015] Preferably, in order to facilitate the disassembly of the insert, a compression spring that deforms in the vertical direction is provided in the insert through hole, and a limiting member is provided on the inner side of the insert through hole to limit the maximum compression of the compression spring so that the top surface of the insert is flush with the top opening of the insert through hole.

[0016] Preferably, to facilitate the handling of blanks, the driving assembly includes a translation unit, a translation frame, and a lifting unit. The translation unit drives the translation frame to move horizontally. The lifting unit is mounted on the translation frame and its output end is connected to the upper forming mold. The movement path of the upper forming mold includes a mold-separating station. At the mold-separating station, the projection of the upper forming mold on the horizontal plane is separated from the projection of the lower forming mold on the horizontal plane.

[0017] In summary, compared with the prior art, the high-precision forming mold with a marking boss balance shaft of this utility model utilizes a support member to support and position the blank, so that the marking on the blank faces downward and directly into the receiving recess. The telescopic unit drives the support member to move downward to the forming station, ensuring that the marking enters the receiving recess while avoiding collision and wear between the marking and the lower mold base. This ensures the integrity of the marking after forming, improves the forming accuracy, reduces the wear of the lower mold base, and extends the mold life. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the billet before shaping; Figure 2 This is a schematic diagram of the structure of an existing shaping mold; Figure 3 This is a structural schematic diagram of an existing shaping mold from another perspective; Figure 4 This is a schematic diagram of the structure of the first embodiment; Figure 5 yes Figure 4 An explosion diagram; Figure 6 This is a schematic diagram illustrating the use of the first embodiment; Figure 7 This is a schematic diagram of the connection structure between the forming mold and the frame in the first embodiment; Figure 8 yes Figure 7 An explosion diagram; Figure 9 yes Figure 7 An illustration of the explosion from another perspective; Figure 10 This is a schematic diagram of the connection structure between the forming mold and the frame in the second embodiment; Figure 11 yes Figure 10 An explosion diagram; Figure 12 yes Figure 11 Enlarged view of part A; Figure 13 This is a schematic diagram of the connection structure between the lower forming die and the frame in the third embodiment; Figure 14 yes Figure 13 A schematic diagram of the cross-sectional structure; Figure 15 yes Figure 14 Enlarged view of part B; In the diagram: 1. Lower forming mold; 11. Lower mold base; 111. Mold base body; 1111. Inlay through hole; 112. Insert; 113. Compression spring; 114. Limiting component; 12. Support component; 121. Shaft support groove; 122. Balance positioning block; 123. Axial positioning component; 124. Slide rod; 125. Slide plate; 13. Telescopic unit; 131. Permanent magnet; 132. Electromagnet; 14. Receiving recess; 15. Lower forming cavity; 16. End groove; 17. Sliding hole; 2. Upper forming mold; 2 1. Upper forming cavity; 22. Guide rod; 3. Translation unit; 31. Translation motor; 32. Screw; 33. Bushing; 34. Position signal sensor; 35. Slide rail; 4. Translation frame; 41. U-shaped frame; 42. Screw sleeve; 43. Sliding sleeve; 44. Guide sleeve; 5. Lifting unit; 6. Frame; 61. Base; 62. Support plate; 63. Pressure platform; 631. First vent hole; 632. Second vent hole; 7. Billet; 71. End shaft; 72. Balance block; 73. Connecting shaft; 74. Marker. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0020] First Embodiment

[0021] like Figures 4-9 As shown, a high-precision forming mold with a marked boss balance shaft according to the first embodiment of this utility model includes: The lower forming mold 1 includes a horizontal lower mold base 11, a support member 12 that slides vertically on the lower mold base 11, and a telescopic unit 13 that drives the support member 12 to slide. The lower mold base 11 is provided with a receiving recess 14 for receiving a mark 74 of the blank 7. The support member 12 is used to support the blank 7 and radially position the blank 7 so that the mark 74 of the blank 7 faces downward. The bottom station of the sliding path of the support member 12 is the forming station. Under the forming station, the top surface of the support member 12 and the top surface of the lower mold base 11 enclose the lower forming cavity 15 of the lower forming mold 1. The receiving recess 14 is connected to the bottom of the lower forming cavity 15. The upper shaping mold 2 is horizontally positioned above the lower shaping mold 1 and has an upper shaping cavity 21 on its top surface; The drive assembly drives the lower forming mold 1 and the upper forming mold 2 to close and separate. When the mold is closed, the lower forming cavity 15 and the upper forming cavity 21 surround each other to form a forming cavity. After the mold is separated, a space is provided between the upper forming mold 2 and the lower forming mold 1 for the blank 7 to be picked up and put in.

[0022] More specifically, the support member 12 includes a shaft support groove 121 disposed at both ends of the lower mold base 11 and a balance positioning block 122 located between the shaft support groove 121. The shaft support groove 121 is used to support both ends of the blank 7. The top surface of the balance positioning block 122 is used to fit against the bottom of the circumferential outer edge of the balance block 72 of the blank 7. The shaft support groove 121 and the balance positioning block 122 are fixedly connected. A frame 6 is fixed below the lower mold base 11. The bottom ends of the shaft support groove 121 and the balance positioning block 122 are both fixed with a slide rod 124 extending in the vertical direction. The slide rod 124 is slidably connected to the frame 6 along its own axial direction and the bottom ends are fixedly connected by a sliding plate 125.

[0023] The driving components include a translation unit 3, a translation frame 4, and a lifting unit 5. The translation unit 3 drives the translation frame 4 to move in the horizontal direction. The lifting unit 5 is set on the translation frame 4 and its output end is connected to the upper forming mold 2. The activity path of the upper forming mold 2 includes a mold parting station. At the mold parting station, the projection of the upper forming mold 2 on the horizontal plane is separated from the projection of the lower forming mold 1 on the horizontal plane.

[0024] The balance shaft blank 7 to be shaped in this embodiment has the following specific structure: Figure 1 As shown, the assembly includes two balancing blocks 72 arranged side by side, integrally connected to each other via a connecting shaft 73. Each of the back-to-back sides of the two balancing blocks 72 is integrally connected to an end shaft 71 with a coaxial centerline. There is a gap between the centerline of the connecting shaft 73 and the centerlines of the two end shafts 71. One of the balancing blocks 72 has an integrally formed mark 74, i.e., an identification boss. The blank 7 has already undergone forging and trimming, and needs to be shaped using the forming mold of this embodiment.

[0025] Specifically, during cosmetic surgery procedures, such as Figure 6As shown in (a), the upper forming mold 2 and the lower forming mold 1 are separated by the drive component, so that the lower forming mold 1 is located to the side and below the upper forming mold 2. The lifting unit 5 drives the translation frame 4 to move upward, and then the translation unit 3 drives the translation frame 4 to move to one side of the lower forming mold 1, so that the upper forming mold 2 moves to the mold separation station. At this station, the projection of the upper forming mold 2 on the horizontal plane is separated from the projection of the lower forming mold 1 on the horizontal plane, so that the upper part of the lower forming mold 1 is unobstructed, which facilitates the placement and clamping of the blank 7. In specific operation, the telescopic unit 13 drives the support member 12 to move upward, so that the shaft support groove 121 on the support member 12 and the horizontal part are aligned. The balancing positioning block 122 moves to the top of the lower mold base 11. There are two shaft support grooves 121 and two balancing positioning blocks 122. The shaft support groove 121 is a positioning groove with a semi-circular cross-section that matches the two end shafts 71 respectively. The balancing positioning block 122 matches the outer edge of the corner of the balancing block 72 on the blank 7. In this way, the two shaft support grooves 121 support the end shafts 71 at both ends of the blank 7. At the same time, the two balancing positioning blocks 122 match the two sides of the corner of the balancing block 72 on the blank 7 to achieve radial positioning of the blank 7, ensuring that the mark 74 on the blank 7 faces downward and is directly opposite the receiving recess 14 on the lower forming mold 1 below.

[0026] Then, as Figure 6 As shown in (b), the telescopic unit 13 drives the support member 12 to descend to the shaping station, so that the blank 7 supported and radially positioned by the support member 12 also descends synchronously with the descent of the support member 12. When the support member 12 descends to the shaping station, the top surface of the lower mold base 11 and the top surface of the support member 12 enclose each other to form the lower shaping cavity 15 of the lower shaping mold 1. At this time, the lower half of the blank 7 is located in the lower shaping cavity 15. Since the blank 7 has been radially positioned by the support member 12 during the descent, the mark 74 on the blank 7 is downward and facing the receiving recess 14, which avoids the blank 7 from radially shifting and rotating during the descent, prevents the mark 74 from colliding with the lower mold base 11, and prevents the mold from being worn and the mark 74 from being deformed. This ensures that the mark 74 can be completely inserted into the receiving recess 14, thereby improving the shaping quality of the product, reducing the wear of the lower mold base 11, and extending the service life of the device.

[0027] After that, as Figure 6 As shown in (c), the translation unit 3 drives the translation frame 4 to move horizontally, so that the upper forming mold 2 moves directly above the lower forming mold 1. At this time, the upper forming cavity 21 on the bottom surface of the upper forming mold 2 is directly opposite the upper half of the blank 7.

[0028] Finally, as Figure 6As shown in (d), the lifting unit 5 drives the upper forming mold 2 to move downward, so that the upper forming mold 2 and the lower forming mold 1 close together. When the molds are closed, the upper forming cavity 21 and the lower forming cavity 15 combine to form a forming cavity for shaping the blank 7, thereby completing the shaping of the blank 7.

[0029] After the shaping process is completed, the lifting unit 5 drives the upper shaping mold 2 to move upward, causing the upper shaping mold 2 to detach from the upper part of the blank 7 (e.g., Figure 6 (c) After that, the translation unit 3 drives the translation frame 4 to translate, so that the upper forming mold 2 moves to the parting station (as shown in the figure). Figure 6 (b) As shown, the telescopic unit 13 then moves the support member 12 upward, lifting the shaped blank 7 (as shown). Figure 6 (a) shows that this makes it easier for the robotic arm to grasp the shaped billet 7.

[0030] Compared with the prior art, the forming mold of this embodiment, before placing the blank 7 in the lower forming cavity 15, uses the telescopic unit 13 to lift the support member 12. The support member 12 is used to conveniently support and pre-position the blank 7, so that the mark 74 of the blank 7 faces downward and is directly opposite the receiving recess 14. During the vertical downward movement of the support member 12 and the blank 7 driven by the telescopic unit 13, the mark 74 is prevented from colliding with the lower mold base 11, preventing wear and deformation of the mark 74, improving the forming accuracy of the blank 7, reducing the wear of the lower forming mold 1, and thus extending the service life of the mold.

[0031] like Figure 7 As shown, when the support member 12 is in the shaping station, the lower shaping mold 1 has an overall cuboid structure with horizontal length and width directions. The two ends of the lower mold base 11 are provided with two end grooves 16 extending in the vertical direction. Between the two end grooves 16, there are two sliding holes 17 distributed along the length direction of the lower mold base 11. The inner walls of the two end grooves 16 are sealed and fitted with the side walls of the two shaft support grooves 121. The inner walls of the two sliding holes 17 are sealed and fitted with the circumferential outer edges of the two balance positioning blocks 122 to ensure the smooth movement of the support member 12 in the vertical direction.

[0032] The specific structure of rack 6 is as follows Figure 5 , Figure 7 and Figure 8As shown, the system includes a horizontal base 61. Above the base 61, two vertically arranged support plates 62 are fixedly connected to a horizontal pressure plate 63, which is arranged side by side along the width of the lower forming mold 1. Two second vent holes 632 are provided above the pressure plate 63, and the two second vent holes 632 are respectively connected to the lower part of the two sliding holes 17. The lower mold base 11 is fixed above the pressure plate 63 to ensure that the sliding holes 17 are connected to the outside world, so as to facilitate the movement of the balance positioning block 122 in the vertical direction and avoid the balance positioning block 122 being sealed to the sliding hole 17. As the balance positioning block 122 moves up and down, it affects the air pressure change inside the sliding hole 17, thereby affecting the movement of the support member 12.

[0033] like Figure 8 and Figure 9 As shown, downwardly extending slide rods 124 are fixed below the shaft support groove 121 and the balance positioning block 122. The four slide rods 124 slide and seal through the pressure plate 63, and the bottom ends of the four slide rods 124 are fixedly connected by a horizontal sliding plate 125.

[0034] A further improvement is that the telescopic unit 13 includes a permanent magnet 131 and an electromagnet 132 distributed along the vertical direction, one of which is fixed to the frame 6 and the other is fixed to the slide plate 125.

[0035] Specifically, the electromagnet 132 is fixed above the base 61, and the permanent magnet 131 is fixed below the slide plate 125. The telescopic unit 13 composed of the electromagnet 132 and the permanent magnet 131 is provided in three sets, which are distributed at intervals along the length direction of the lower shaping mold 1. With the above structure, controlling the current through the electromagnet 132 can change the magnetism of the electromagnet 132. When it is necessary to lift the support member 12 upwards and use the support member 12 to support and radially position the billet 7, the current of the electromagnet 132 is gradually increased, so that the electromagnet 132 generates a magnetism that repels the permanent magnet 131. Finally, the slide plate 125 abuts against the bottom of the pressure table 63. Then, the billet 7 is placed on the support member 12, and the current through the electromagnet 132 is gradually reduced, so that the support member 12 drives the billet 7 to gradually descend. Finally, the support member 12 moves downward to the forming station, and the pressure table 63 supports the bottom of the shaft support groove 121 and the balance positioning block 122. At this time, the current passing through the electromagnet 132 can be reduced to zero. In this way, the smooth lifting and lowering movement of the support member 12 is achieved.

[0036] A further improvement is that axial positioning elements 123 are provided at both opposite ends of the shaft support groove 121, and the axial positioning elements 123 are received within the corresponding shaft support groove 121, such as... Figure 7 and Figure 8As shown, by setting the axial positioning component 123, the blank 7 placed on the support component 12 can be axially positioned, further ensuring that the mark 74 on the blank 7 is located directly above the receiving recess 14. This allows the mark 74 to enter the receiving recess 14 without touching other positions of the lower mold base 11 during the process of the telescopic unit 13 driving the support component 12 to descend, thus avoiding collisions and wear. This helps to improve the forming accuracy, reduce mold wear, and extend the service life.

[0037] To achieve position adjustment of the upper shaping mold 2, in this embodiment, the structure of the driving component is as follows: Figure 5 As shown, specifically, the translation frame 4 includes an inverted U-shaped frame 41. One end of the U-shaped frame 41 is fixed with a threaded sleeve 42, and the other end is fixed with a sliding sleeve 43. The sliding paths of the threaded sleeve 42 and the sliding sleeve 43 are located at the two ends of the lower forming mold 1, respectively. The axial directions of the threaded sleeve 42 and the sliding sleeve 43 are parallel to the width direction of the lower forming mold 1. An upwardly extending guide sleeve 44 is fixed to the top of the U-shaped frame 41, and an upwardly extending guide rod 22 is fixed to the top of the upper forming mold 2. The outer circumferential edge of the guide rod 22 is sealed and fitted with the inner circumferential wall of the guide sleeve 44 to ensure that the upper forming mold 2 moves smoothly up and down in the vertical direction when the lifting unit 5 is running. The lifting unit 5 is a hydraulic cylinder, whose cylinder is vertically fixed to the top of the U-shaped frame 41, and the bottom end of the piston rod is fixedly connected to the upper forming mold 2.

[0038] The translation unit 3 includes a translation motor 31, a screw 32, a bushing 33, a slide rail 35, and a positioning signal sensor 34. The translation motor 31 and the bushing 33 are both fixed above the base 61. The output end of the translation motor 31 is fixedly connected to one end of the screw 32 along the same axis. The other end of the screw 32 rotates inside the bushing 33. The screw 32 is threadedly connected to the bushing 42. The bushing 33 is adjacent to the lower forming mold 1. The slide rail 35 includes a horizontal crossbar. The two ends of the crossbar are fixed above the base 61 by connecting blocks. The bushing 43 is slidably sleeved outside the crossbar. The positioning signal sensor 34 is located on the side of the bushing 33 adjacent to the bushing 42. When the upper forming mold 2 is directly above the lower forming mold 1, the positioning signal sensor 34 is in contact with the bushing 42.

[0039] With the above design, when the translation motor 31 is running, it drives the screw 32 to rotate around its own axis under the support of the bushing 33. This rotation acts on the screw sleeve 42 through the thread. Under the sliding cooperation of the slide rail 35 and the slide sleeve 43, the translation frame 4 moves along the width direction parallel to the lower forming mold 1, thereby changing the height position of the upper forming mold 2.

[0040] Second Embodiment

[0041] like Figures 10-12As shown, the second embodiment of this utility model is a high-precision shaping mold with a marked boss balance shaft, which is based on the first embodiment, except that the recess 14 is adapted to the mark 74 of the blank 7.

[0042] This design ensures the integrity of the mark 74 on the blank 7 during the forming process, preventing deformation of the mark 74. Specifically, the fitting recess 14 provides precise space for the mark 74. During the forming process, the mark 74 is subjected to uniform pressure, preventing excessive local pressure. This effectively avoids deformation of the mark 74 due to uneven force, such as changes in the thickness of character strokes or distortion. Thus, the fitting recess 14 ensures that the mark 74 remains clear and intact after forming, facilitating product differentiation and traceability.

[0043] Furthermore, it can provide more precise positioning constraints for the blank 7 during the forming process, making the pressure on other parts more uniform and accurate during forming. This helps to better control the dimensional tolerances of each part of the blank 7, reduce problems such as local deformation or dimensional deviation caused by positional deviation, improve the forming effect, and improve the overall dimensional accuracy of the balance shaft.

[0044] Furthermore, since the recess 14 matches the mark 74, when placing the blank 7 for shaping, the operator can more accurately place the balance shaft to be shaped onto the lower mold base 11, reducing the adjustment and correction time, improving the convenience and efficiency of production operations, and ultimately ensuring the integrity and precision of the product. After the first-time shaping qualification rate of the product is improved, the number of reworks can be reduced, thereby saving production time and costs, and thus improving the overall production efficiency.

[0045] A further improvement is that the lower mold base 11 includes a mold base body 111 and an insert 112 detachably connected to the mold base body 111, with a recess 14 provided on the top surface of the insert 112.

[0046] Specifically, the mold base body 111 is provided with an inlay through hole 1111 extending in the vertical direction. The outer circumferential edge of the insert 112 is sealed and fitted with the inlay through hole 1111. The insert 112 is inserted and fitted into the inner side of the inlay through hole 1111. The bottom end of the insert 112 abuts against the top surface of the pressure plate 63.

[0047] After adopting the above design, it is convenient to replace the insert 112 on the lower forming mold 1, so that the corresponding insert 112 can be selected according to the different shapes and sizes of the markings 74 on the blank 7, avoiding the need to replace the entire lower forming mold 1, saving costs. Moreover, when the recess 14 is worn or deformed, only the insert 112 needs to be replaced to continue to be used, reducing replacement and maintenance costs.

[0048] The pressure plate 63 is also provided with a first vent hole 631, which is connected to the bottom of the inlay through hole 1111 to ensure that the inlay through hole 1111 is connected to the outside world, so as to facilitate the lifting and lowering movement of the insert 112 in the inlay through hole 1111, so as to facilitate the removal and placement of the insert 112.

[0049] Third Embodiment

[0050] like Figures 13-15 As shown, the third embodiment of this utility model provides a high-precision shaping mold with a marked boss balance shaft, which is based on the second embodiment. The difference is that a compression spring 113 that deforms in the vertical direction is provided in the inlaid through hole 1111, and a limiting member 114 is provided on the inner side of the inlaid through hole 1111 to limit the maximum compression of the compression spring 113 so that the top surface of the insert 112 is flush with the top opening of the inlaid through hole 1111.

[0051] Specifically, the limiting member 114 is integrally formed on both sides of the bottom end of the insert 112, and the compression spring 113 is located between the two limiting members 114, with its two ends abutting against the bottom of the insert 112 and the top surface of the pressure plate 63, respectively.

[0052] With the above design, the compression spring 113 can support the insert 112, so that the top surface of the insert 112 protrudes from the top of the through hole 1111 of the mold base body 111 when there is no other external influencing force, which facilitates the replacement of the insert 112. The two limiting members 114 integrally formed at the bottom of the insert 112 form limiting feet, which can not only limit the maximum compression deformation of the compression spring 113 and protect the compression spring 113 from excessive compression and deformation, but also, when the mold is closed, when it is subjected to downward movement from the upper forming mold 2, the limiting members 114 abut against the bottom of the pressure table 63, so that the top surface of the insert 112 is flush with the top opening of the through hole 1111, thereby ensuring the forming quality of the blank 7.

[0053] The compression spring 113 is clamped between the top surface of the pressure plate 63 and the bottom surface of the insert 112, which makes it convenient to remove the insert 112 after the compression spring 113 ages due to long-term use, and to facilitate the replacement of the compression spring 113 in the through hole 1111.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-precision forming mold with a marked boss and a balance shaft, characterized in that, include: The lower forming die includes a horizontal lower die base, a support member that slides vertically on the lower die base, and a telescopic unit that drives the support member to slide. The lower die base is provided with a receiving recess for accommodating a blank mark. The support member is used to support the blank and radially position the blank so that the blank mark faces downward. The bottom station of the sliding path of the support member is a forming station. Below the forming station, the top surface of the support member and the top surface of the lower die base enclose the lower forming cavity of the lower forming die. The receiving recess is connected to the bottom of the lower forming cavity. The upper shaping mold is horizontally positioned above the lower shaping mold and has an upper shaping cavity on its top surface; The driving component drives the lower forming mold and the upper forming mold to close and separate. When the mold is closed, the lower forming cavity and the upper forming cavity surround each other to form a forming cavity. After the mold is separated, a space for loading and unloading blanks is provided between the upper forming mold and the lower forming mold.

2. The high-precision forming mold with a marked boss balance shaft according to claim 1, characterized in that: The support member includes a shaft support groove disposed at both ends of the lower mold base and a balance positioning block located between the shaft support grooves. The shaft support groove is used to support both ends of the blank. The top surface of the balance positioning block is used to fit against the bottom of the outer circumferential edge of the balance block of the blank. The shaft support groove and the balance positioning block are fixedly connected.

3. The high-precision forming mold with a marked boss and balance shaft according to claim 2, characterized in that: Axial positioning components are provided at both opposite ends of the shaft support groove, and the axial positioning components are housed in the corresponding shaft support groove.

4. The high-precision forming mold with a marked boss and balance shaft according to claim 2, characterized in that: A frame is fixed below the lower mold base. The bottom ends of the shaft support groove and the balance positioning block are both fixed with slide rods extending in the vertical direction. The slide rods are slidably connected to the frame along their own axial direction and their bottom ends are fixedly connected by a sliding plate.

5. The high-precision forming mold with a marked boss balance shaft according to claim 4, characterized in that: The telescopic unit includes permanent magnets and electromagnets distributed along the vertical direction, one of which is fixed to the frame and the other is fixed to the slide plate.

6. The high-precision forming mold with a marked boss balance shaft according to any one of claims 1-5, characterized in that: The recessed area is adapted to the markings on the blank.

7. The high-precision forming mold with a marked boss balance shaft according to claim 6, characterized in that: The lower mold base includes a mold base body and an insert detachably connected to the mold base body, and the receiving recess is provided on the top surface of the insert.

8. The high-precision forming mold with a marked boss balance shaft according to claim 7, characterized in that: The mold base body is provided with an inlay through hole extending in the vertical direction. The outer circumferential edge of the insert is sealed and fitted with the inlay through hole, and the insert is inserted into the inner side of the inlay through hole.

9. The high-precision forming mold with a marked boss and balance shaft according to claim 8, characterized in that: A compression spring that deforms in the vertical direction is provided inside the inlaid through hole, and a limiting member is provided on the inner side of the inlaid through hole to limit the maximum compression of the compression spring so that the top surface of the insert is flush with the top opening of the inlaid through hole.

10. The high-precision forming mold with a marked boss balance shaft according to any one of claims 1-5, characterized in that: The driving assembly includes a translation unit, a translation frame, and a lifting unit. The translation unit drives the translation frame to move horizontally. The lifting unit is mounted on the translation frame and its output end is connected to the upper forming mold. The movement path of the upper forming mold includes a mold parting station. At the mold parting station, the projection of the upper forming mold on the horizontal plane is separated from the projection of the lower forming mold on the horizontal plane.

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