An upper ejector reset mechanism for a die holder of a hot forging device

Abstract

The present application relates to a top stock reset mechanism for a die holder of a hot forging device, belonging to the technical field of hot forging devices. The top stock reset mechanism includes an equipment body, a hot die forging tooling and a die. The equipment body includes an equipment base and an equipment top seat. The hot die forging tooling includes an upper die body and a lower die body arranged between the equipment base and the equipment top seat. The die is fixed between the upper die body and the lower die body. The upper die body is provided with a top stock reset mechanism. The top stock reset mechanism includes a first ejector rod, a first elastic member for driving the first ejector rod to reset, a second ejector rod and a second elastic member for driving the second ejector rod to reset. The first ejector rod and the second ejector rod are in abutting cooperation. The first ejector rod corresponds to the hydraulic drive of the equipment body, and the second ejector rod corresponds to the forging. Through the arrangement of the top stock reset mechanism, the probability of defects caused by the top stock mechanism to the forging is reduced in the present application.

Description

Technical Field

[0001] The present application relates to the technical field of hot forging equipment, and in particular to an upper ejector reset mechanism for a die holder of hot forging equipment. Background Art

[0002] Hot forging equipment, also known as hot forging hydraulic press or hot forging press, is a forging equipment that realizes hot forming of metal blanks with the help of dies. Hot forging equipment is mainly used to manufacture metal workpieces with high strength, high wear resistance and high precision, such as shafts, discs, flanges, etc.

[0003] The existing hot forging equipment includes an equipment body for support and fixation, a hydraulic transmission system, an electric control system, etc. During forging, hot die tooling is required to fix different dies on the equipment body. The existing hot die tooling includes an upper die body and a lower die body, and the die is fixed between the upper die body and the lower die body. After the forging is formed in the die, it needs to be ejected by an ejection mechanism. The equipment body usually comes with an upper ejector mechanism and a lower ejector mechanism, and the ejector mechanism of the equipment body is hydraulically driven. Therefore, the upper die body and the lower die body also need upper ejector mechanisms and lower ejector mechanisms corresponding to the upper ejector mechanism and the lower ejector mechanism respectively.

[0004] The upper ejector mechanism and the lower ejector mechanism are slidably installed on the corresponding die body. After forging is completed, the lower ejector mechanism drives the lower ejector mechanism to move upward, and the upper ejector mechanism drives the upper ejector mechanism to move downward to realize the discharging of the forging. After the upper ejector mechanism and the lower ejector mechanism are reset, the lower ejector mechanism can be reset and lowered under its own gravity, but the upper ejector mechanism still remains in the lowered state. The upward reset of the upper ejector mechanism is achieved by the abutment of the forging and the upper ejector mechanism during the next forging. The impact force during forging is relatively large. The method of resetting the upper ejector mechanism by the forging causes greater damage to the upper ejector mechanism and also appears defective such as burrs and indentations on the surface of the forging. The existing structure can solve the above problems, but the structure is generally relatively complex and inconvenient to assemble. Summary of the Invention

[0005] In order to reduce the probability of defects caused by the upper ejector mechanism to the forging and improve the service life of the upper ejector mechanism, the present application provides.

[0006] An upper ejector reset mechanism for a die holder of hot forging equipment provided by the present application adopts the following technical solutions:

[0007] An upper ejector reset mechanism for a die holder of a hot forging device, comprising a device body, a hot die tooling and a die. The device body includes a device base and a device top seat. The hot die tooling includes an upper die body and a lower die body disposed between the device base and the device top seat. The die is fixed between the upper die body and the lower die body. The upper die body is provided with an ejector reset mechanism. The ejector reset mechanism includes a first ejector rod, a first elastic member for driving the first ejector rod to reset, a second ejector rod, and a second elastic member for driving the second ejector rod to reset. The first ejector rod and the second ejector rod are in abutting cooperation. The first ejector rod and the hydraulic drive of the device body are correspondingly arranged, and the second ejector rod and the forging are correspondingly arranged.

[0008] By adopting the above technical solution, before the forging is ejected, the first ejector rod and the second ejector rod on the upper die body are respectively in the top position under the action of the first elastic member and the second elastic member, that is, the second ejector rod and the forging are in an interval state. Start the hydraulic drive of the device body, first push the first ejector rod to move downward, and then the first ejector rod drives the second ejector rod to move downward. Push the ejector rod of the die through the second ejector rod, and then eject the forging from the die. The overall structure of the above ejector reset mechanism is relatively simple, easy to install, can reduce the probability of damage to the forging by the ejector rod of the upper die body, and improve the forming yield rate of the forging.

[0009] Optionally, the upper die body is provided with a placement counterbore for slidably mounting the first ejector rod. The first elastic member is sleeved on the first ejector rod. The end of the first ejector rod has a first limiting portion for the first elastic member to abut against, and the other end of the first elastic member abuts against the stepped surface of the placement counterbore.

[0010] By adopting the above technical solution, the installation structure of the first ejector rod in the upper die body and the placement of the first elastic member are disclosed. The first ejector rod is limitedly arranged in the placement counterbore. The first elastic member is sleeved on the first ejector rod and abuts against the first limiting portion and the stepped surface of the placement counterbore at both ends respectively. The first elastic member can make the first ejector rod have a tendency to always move upward. When the hydraulic drive of the device body resets, the first elastic member drives the first ejector rod to reset upward. The cooperation mode of the first ejector rod and the first elastic member is simple and convenient to assemble.

[0011] Optionally, the upper die body is provided with at least three groups of the first ejector rods, and the first ejector rods are arranged at equal intervals.

[0012] By adopting the above technical solution, the setting of multiple groups of first ejector rods forms multi-point pushing on the second ejector rod, which can evenly disperse the driving force of the device body to the first ejector rods, and improve the stability and precision during forging demoulding.

[0013] Optionally, the second ejector rod is a special-shaped plate adapted to the shape of the forging. The second ejector rod is provided with a plurality of limiting plates, and the upper die body is provided with guiding and fixing rods corresponding to the limiting plates and used for guiding the sliding of the second ejector rod. The second elastic member is sleeved on the guiding and fixing rod.

[0014] By adopting the above technical solution, the installation structure of the second ejector rod is disclosed. The second ejector rod is replaced according to the shape of the forging to improve the ejection effect. The limiting rod and the second elastic member of the second ejector rod are sleeved and matched, so that the second ejector rod is located on the side far from the forging under normal conditions, so as to reduce the influence of the second ejector rod on the forging when the upper die body moves downward.

[0015] Optionally, the guiding and fixing rod includes a fixing part and a guiding part. The fixing part is fixedly connected to the upper die body, and the limiting plate has a guiding hole for the guiding part to pass through.

[0016] By adopting the above technical solution, the specific structure of the guiding and fixing rod is disclosed. The fixing part is fixedly connected to the upper die body to increase the overall stability of the guiding and fixing rod. The limiting rod is slidably matched with the guiding part through the guiding hole, so that the limiting sliding fit between the second ejector rod and the guiding and fixing rod is realized. The guiding and fixing rod can play a guiding role in the sliding of the second ejector rod and reduce the probability of the second ejector rod tipping over.

[0017] Optionally, the upper die body has a sliding groove for the limiting part to slide, and the upper die body has a positioning surface for one end of the second elastic member to abut in the sliding groove. The other end of the second elastic member abuts against the bottom of the limiting part.

[0018] By adopting the above technical solution, the limiting part is located in the sliding groove, and the two ends of the second elastic member respectively abut against the positioning surface and the limiting part, so that the second ejector rod has good sliding stability as a whole.

[0019] Optionally, the top of the fixing part and the top of the second ejector rod both abut against the top wall of the sliding groove, and the depth of the sliding groove is greater than the length of the second ejector rod in the height direction.

[0020] By adopting the above technical solution, the depth of the sliding groove is greater than the thickness of the second ejector rod, so that the second ejector rod is completely located in the sliding groove under normal conditions, reducing the wear caused by friction between the second ejector rod and other components and facilitating the maintenance of the staff.

[0021] Optionally, the upper mold body is provided with a first protective structure covering the bottom opening of the sliding groove, the first protective structure includes a first sliding block horizontally slidably installed on the opposite side walls of the sliding groove and a third elastic member driving the first sliding block to reset, and a driving inclined surface is provided on the side of the first sliding block facing the second push rod. When the second push rod moves downward, the second push rod abuts against the driving inclined surface and drives the two first sliding blocks to slide away from each other.

[0022] By adopting the above technical scheme, the setting of the first protective structure can play a sealing and protective role for the opening of the sliding groove. Before the hot forging equipment is normally placed and the forging is pushed out, the first sliding protective structure covers the opening of the sliding groove, which can reduce the probability of external dust and impurities entering the sliding groove, ensure the cleanliness of the second push rod and the guide fixing rod, and improve the overall service life of the upper mold body. When the second push rod moves downward, the first slider moves in a direction away from each other under the action of the driving inclined surface, so that the first push rod can be pushed out of the sliding groove. When the second push rod is reset upward under the action of the second elastic member, the first slider is automatically reset horizontally under the action of the third elastic member, thereby realizing the sealing of the sliding groove again. The overall structure is simple, and no additional driving equipment is required to realize the sliding of the first slider.

[0023] Optionally, the second push rod is I-shaped, the sliding groove is adapted to the second push rod, the upper mold body is provided with a second protective structure at the corner of the sliding groove, the sliding structure of the second slider is consistent with the structure of the first slider, the second protective structure and the first protective structure slide alternately in the height direction, the second protective structure includes four second sliders, and the four second sliders form a rectangular plate.

[0024] By adopting the above technical solution, when the second push rod is an I-shaped structure, the first protective structure cannot be applied to the corners of two adjacent slide grooves. Therefore, the second protective structure is set to seal the slide groove at the corner, and the second protective structure and the first protective structure slide alternately in the height direction, so that the sliding of the second slider and the sliding of the first slider do not affect each other, thereby improving the sealing integrity of the slide groove.

[0025] Optionally, the first slider corresponding to each other and the adjacent second slider are both provided with a sealing structure on the bonding side, and the sealing structure includes a first magnetic sheet, a second magnetic sheet, an annular groove and an annular sealing ring. The first magnetic sheet and the second magnetic sheet are attracted to cooperate with each other, and the annular groove and the annular sealing ring are correspondingly arranged.

[0026] By adopting the above technical solution and setting the sealing structure, after the second push rod is combined, the sliding efficiency of the first slider and the second slider is improved through the mutual attraction of the first magnetic sheet and the second magnetic sheet, and the sealing effect of the two protective structures is further improved.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] Through the setting of the upper ejector reset mechanism in the present application, after the hydraulic drive member of the equipment body is reset, the first ejector rod and the second ejector rod can be automatically reset, reducing the probability of damage to the forging by the ejector rod of the upper die body and improving the forming quality of the forging. Compared with the existing reset structure, it has the effects of simple structure and convenient assembly;

[0029] Through the setting of the guiding fixed rod in the present application, it can guide the sliding of the second ejector rod, improve the sliding stability and the ejecting efficiency of the second ejector rod on the forging;

[0030] Through the setting of the protection structure in the present application, it can seal the bottom opening of the sliding groove, reducing the probability of external dust and chips entering the sliding groove before the second ejector rod performs the ejecting operation, improving the service life of the second ejector rod. At the same time, the closing and sealing of the protection structure are combined with the pushing action of the second ejector rod, simplifying the structure and facilitating assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the overall structural schematic diagram of Embodiment 1.

[0032] Figure 2 is the exploded schematic diagram of the upper die body of Embodiment 1.

[0033] Figure 3 is the cross-sectional schematic diagram of the ejector reset mechanism of Embodiment 1.

[0034] Figure 4 is Figure 3 the partial enlarged schematic diagram at A in

[0035] Figure 5 is the top surface structural schematic diagram of the upper backing plate of Embodiment 1.

[0036] Figure 6 is the cross-sectional schematic diagram of the guiding fixed rod of Embodiment 1.

[0037] Figure 7 is the bottom structural schematic diagram of the upper sub-die base of Embodiment 2.

[0038] Figure 8 is the cross-sectional schematic diagram of the first protection structure of Embodiment 2.

[0039] Figure 9 is the cross-sectional schematic diagram of the first protection structure and the second protection structure of Embodiment 2 in the horizontal direction.

[0040] Figure 10 is the structural schematic diagram of the sealing structure of Embodiment 2.

[0041] Description of reference numerals: 1. Equipment body; 11. Equipment base; 12. Equipment top seat; 2. Hot die tooling; 3. Die; 4. Upper die body; 41. Upper die seat; 411. Installation groove; 412. Countersunk head hole; 42. Upper backing plate; 421. Communication hole; 43. Upper sub-die seat; 431. Sliding groove; 4311. Positioning surface; 4312. Strip groove; 4313. Corner groove; 432. Positioning groove; 433. First sliding groove; 4331. Limiting groove; 44. Side cylinder ejector pin; 45. Placing counterbore; 46. Guide fixing rod; 461. Fixing part; 462. Guide part; 5. Lower die body; 6. Ejector and reset mechanism; 61. First ejector rod; 611. First limiting part; 62. First elastic member; 63. Second ejector rod; 631. Limiting plate; 632. Guide hole; 64. Second elastic member; 7. First protection structure; 71. First slider; 711. Elastic limiting part; 7111. Guide surface; 712. Driving inclined surface; 72. Third elastic member; 8. Second protection structure; 81. Second slider; 811. Second inclined surface; 9. Sealing structure; 91. First magnetic sheet; 92. Second magnetic sheet; 93. Annular groove; 94. Annular sealing ring. Detailed implementation manners

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the disclosed embodiments of the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the gravity direction. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0043] The following is a further detailed description of this application in conjunction with the attached Figures 1-10 drawings.

[0044] The embodiment of this application discloses an upper ejector and reset mechanism for a die seat of a hot forging equipment. Embodiment 1:

[0045] Refer to Figure 1, An upper ejector reset mechanism for a die holder of a hot forging device, comprising a device body 1, a hot die tooling 2 and a die 3. The structure of the device body 1 is the same as that of the prior art, which includes a device base 11 and a device top seat 12. The device top seat 12 is slidably mounted above the device base 11 through a hydraulic cylinder, and hydraulic driving members are provided on both the device top seat 12 and the device base 11. The hydraulic driving member is a linear hydraulic cylinder for pushing out the forging in the die 3.

[0046] Combined with Figure 2 and Figure 3 , the hot die tooling 2 includes an upper die body 4 fixed to the top of the device base 11 and a lower die body 5 fixed to the bottom of the device top seat 12. The upper die body 4 and the lower die body 5 are slidably matched, the upper and lower dies of the die 3 are respectively arranged at the bottom of the upper die body 4 and the bottom of the lower die body 5, and ejector mechanisms corresponding to the hydraulic driving members are installed in both the upper die body 4 and the lower die body 5. When the forging is completed in the die 3, the hydraulic driving member first pushes the ejector mechanism of the hot die tooling 2, and then pushes the forging in the die 3 through the ejector mechanism. Among them, the ejector mechanism in the upper die body 4 is defined as an ejector reset mechanism 6.

[0047] The upper die body 4 from top to bottom in the height direction is successively an upper die seat 41, an upper backing plate 42 and an upper sub-die seat 43. The top of the upper die seat 41 is fixedly connected to the device top seat 12 through a T-shaped nut. The bottom of the upper die seat 41 has an installation groove 411 for installing the upper backing plate 42 and the upper sub-die seat 43, and the upper backing plate 42 is fixed to the top of the installation groove 411 by bolts. The upper sub-die seat 43 and the upper backing plate 42 are mutually attached, and a side cylinder ejector pin 44 for pressing the upper sub-die seat 43 is provided on the side wall of the upper die seat 41. The bottom of the upper sub-die seat 43 is flush with the bottom surface of the upper die seat 41.

[0048] The ejector reset mechanism 6 includes a first ejector rod 61 arranged on the upper die seat 41, a first elastic member 62 for driving the first ejector rod 61 to reset, a second ejector rod 63 arranged on the upper sub-die seat 43 and a second elastic member 64 for driving the second ejector rod 63 to reset.

[0049] Referring to Figure 3 and Figure 4 , the first ejector rod 61 is integrally in the shape of a screw with a smooth side wall, and its top has a first limiting portion 611. The upper die seat 41 has a countersunk hole 412 penetrating through both side walls and communicating with the installation groove 411, and the upper backing plate 42 has a communication hole 421 corresponding to the countersunk hole 412. The countersunk hole 412 and the communication hole 421 are combined to form a placement countersunk hole 45 for installing the first ejector rod 61. The first elastic member 62 is a rectangular spring, which is sleeved on the first ejector rod 61 and abuts against the stepped surface of the placement countersunk hole 45 and the first limiting portion 611 at both ends.

[0050] Referring to Figure 5 and Figure 6, the second ejector rod 63 is of a special-shaped plate structure, and the shape of the second ejector rod 63 can be replaced according to the shape of the forging. In this embodiment, the second ejector rod 63 is in an I-shaped structure, and extension parts are formed at both ends of the waist of the I-shape and extend in a direction away from each other. The number and arrangement direction of the first ejector rods 61 are also adjusted according to the shape of the second ejector rod 63. In this embodiment, a total of three groups of first ejector rods 61 are installed on the upper die base 41, and the first ejector rods 61 are arranged corresponding to the waist of the second ejector rod 63, and the three groups of first ejector rods 61 are evenly spaced.

[0051] The bottom of the upper sub-die base 43 has a sliding groove 431 for the second ejector rod 63 to slide, and the cross-section of the sliding groove 431 is adapted to the second ejector rod 63. Limiting plates 631 extending horizontally are provided at both end parts of the two wing plates of the second ejector rod 63. The upper sub-die base 43 is provided with a guiding and fixing rod 46 for guiding the sliding of the second ejector rod 63 in the sliding groove 431, and the guiding and fixing rod 46 includes a fixing part 461 and a guiding part 462.

[0052] The fixing part 461 is in the shape of a rectangular plate, the guiding part 462 is in the shape of a cylindrical rod, and the fixing part 461 and the guiding part 462 are combined to form a T-shaped guiding and fixing rod 46. The top of the upper sub-die base 43 has a positioning groove 432 for placing the fixing part 461. The fixing part 461 is placed in the positioning groove 432 and then fixedly connected to the upper sub-die base 43 by bolts. The limiting plate 631 has a guiding hole 632 penetrating through both side end faces and slidably matched with the guiding part 462. The second elastic member 64 is a rectangular spring, and it is sleeved on the guiding part 462. One end of the second elastic member 64 abuts against the bottom of the limiting plate 631, and a positioning surface 4311 for the other end of the second elastic member 64 to abut against is provided on the bottom wall of the sliding groove 431. Through the arrangement of the guiding and fixing rod 46, the sliding of the second ejector rod 63 can be guided, and the stability of the second ejector rod 63 when ejecting the forging downward can be improved.

[0053] The depth of the sliding groove 431 in the height direction is greater than the thickness of the second ejector rod 63. Under the normal action of the second elastic member 64, the second ejector rod 63 is completely located in the sliding groove 431. When the hydraulic driving member is started, the first ejector rod 61 pushes the second ejector rod 63 out of the sliding groove 431 to push the forging of the mold 3.

[0054] The implementation principle of the upper ejector reset mechanism 6 on the die holder of the hot forging equipment in the embodiment of the present application is as follows: The first ejector rod 61 and the second ejector rod 63 are in a spaced state from the forging of the die 3 under the action of the first elastic member 62 and the second elastic member 64 respectively. When the equipment body 1 completes forging, the equipment top seat 12 drives the upper die body 4 and the upper die of the die 3 to move upward. The hydraulic driving member is started, and the first ejector rod 61 is first driven to slide downward. The first ejector rod 61 abuts against the second ejector rod 63 to drive the second ejector rod 63 to move downward. Finally, the forging is ejected from the die 3 through the second ejector rod 63. When the hydraulic driving member is reset, the first ejector rod 61 and the second ejector rod 63 are reset under the action of the first elastic member 62 and the second elastic member 64 respectively, reducing the probability of damage to the forging caused by the second ejector rod 63 during the next forging. Embodiment 2:

[0055] Compared with Embodiment 1, in the embodiment of the present application, except for adding a protective structure, the rest of the structures are the same as those in Embodiment 1.

[0056] Referring to Figure 7 and Figure 8 , the protective structure is used to seal the sliding groove 431, so as to reduce the probability of external dust and flying debris entering the sliding groove 431 when the upper die body 4 is placed and forged daily, and improve the service life of the second ejector rod 63. In this embodiment, taking the shape of the second ejector rod 63 in Embodiment 1 as an example, the second ejector rod 63 is in an I shape with a protruding waist, and arc chamfers are provided at the joints of its waist and wing plates. Therefore, the sliding groove 431 also has an arc guide surface that cooperates with the arc chamfer.

[0057] The sliding groove 431 includes a plurality of strip-shaped grooves 4312 and corner grooves 4313, and the protective structure includes a first protective structure 7 for sealing the strip-shaped grooves 4312 and a second protective structure 8 for sealing the corner grooves 4313.

[0058] The first protection structure 7 includes first sliders 71 slidably mounted on opposite side walls of the strip-shaped groove 4312 and a third elastic member 72 for driving the first sliders 71 to reset. The two first sliders 71 are both arranged for horizontal sliding. The first slider 71 is a strip-shaped plate adapted to the length of the strip-shaped groove 4312. The upper die base 43 has a first sliding groove 433 for slidably mounting the first slider 71. Elastic limiting portions 711 are provided on opposite side walls of the first slider 71, and the elastic limiting portions 711 are fixed to the first slider 71 by springs. The end of the elastic limiting portion 711 has a guiding surface 7111 for guiding insertion into the first sliding groove 433, and the side wall of the first sliding groove 433 has a limiting groove 4331 for arranging the elastic limiting portion 711. When installing the first slider 71, the first slider 71 is horizontally inserted into the first sliding groove 433. The elastic limiting portions 711 on both sides of the first slider 71 are pressed inward toward the first slider 71 under the action of the spring. After the elastic limiting portion 711 and the limiting groove 4331 are aligned, the elastic limiting portion 711 automatically snaps into the limiting groove 4331, realizing the limiting installation of the first slider 71 and the first sliding groove 433.

[0059] The third elastic member 72 is a spring member, which is fixed to the side wall of the first sliding groove 433. The first slider 71 has a positioning hole corresponding to the third elastic member 72 relatively far from the side wall.

[0060] Refer to Figure 8 and Figure 9 As shown in and, the end face of the first slider 71 facing the second ejector rod 63 is provided with a driving inclined surface 712. The cross section formed by the driving inclined surfaces 712 of the two first sliders 71 is V-shaped. When the second ejector rod 63 moves downward, it can drive the two first sliders 71 to move away from each other. When the second ejector rod 63 resets upward, the two first sliders 71 automatically reset under the action of the first elastic member 62, and the strip-shaped groove 4312 is covered again.

[0061] The second protection structure 8 includes second sliders 81 slidably mounted in the corner groove 4313 and a fourth elastic member (not marked in the figure) for driving the second sliders 81 to reset. The corner groove 4313 is a rectangular groove, so there are four second sliders 81. The sliding structure and installation method of the second sliders 81 are the same as those of the first slider 71, but the second sliders 81 and the first slider 71 are arranged staggeredly in the height direction. Among them, the second sliders 81 are located above the first slider 71. The second sliders 81 also have second inclined surfaces 811 for the second ejector rod 63 to abut against. The second inclined surfaces 811 of the four second sliders 81 incline toward the center of the rectangular groove. When the second ejector rod 63 is pushed downward by the first ejector rod 61, the four second sliders 81 tend to move radially outward. In order to ensure that the first slider and the second slider can be completely pushed into the upper die base, when designing the upper die base, the depth of the sliding groove can be increased, and at the same time, the piston stroke of the hydraulic driving member can be adjusted.

[0062] Reference Figure 10 , in order to improve the sealing effect of the first slider 71 and the second slider 81, this embodiment further includes a sealing structure 9. The sealing structure 9 includes a first magnetic sheet 91 and a second magnetic sheet 92, and the first magnetic sheet 91 and the second magnetic sheet 92 attract each other. In the first protection structure 7, two ceramic sheets are respectively arranged on the mutually corresponding side walls of the first slider 71. In the second protection structure 8, two magnetic sheets are respectively arranged on the adjacent corresponding side walls of the second slider 81.

[0063] The outer end surface of the first slider 71 further has an annular groove 93, and the outer end surface of another first slider 71 is provided with an annular sealing ring 94 corresponding to the annular groove 93. After the first slider 71 and the second slider 81 are abutted, the first magnetic sheet 91 and the second magnetic sheet 92 attract each other to improve the connection stability of the two first sliders 71. At the same time, the annular sealing ring 94 is inserted into the annular groove 93 to achieve a sealing fit.

[0064] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An upper ejector reset mechanism for a die holder of a hot forging equipment, comprising an equipment body (1), a hot die tooling (2) and a die (3). The equipment body (1) includes an equipment base (11) and an equipment top seat (12). The hot die tooling (2) includes an upper die body (4) and a lower die body (5) disposed between the equipment base (11) and the equipment top seat (12). The die (3) is fixed between the upper die body (4) and the lower die body (5), and is characterized in that, The upper mold body (4) is provided with a material ejection reset mechanism (6), the material ejection reset mechanism (6) comprising a first ejector rod (61), a first elastic member (62) for driving the first ejector rod (61) to reset, a second ejector rod (63), and a second elastic member (64) for driving the second ejector rod (63) to reset, the first ejector rod (61) and the second ejector rod (63) being in abutment with each other, the first ejector rod (61) and the hydraulic drive of the equipment body (1) being arranged correspondingly, and the second ejector rod (63) and the forging being arranged correspondingly; The second push rod (63) is a special-shaped plate adapted to the shape of the forging, the second push rod (63) is provided with a plurality of limit plates (631), the upper mold body (4) is provided with a guide fixing rod (46) corresponding to the limit plates (631) and used to guide the second push rod (63) to slide, and the second elastic member (64) is sleeved on the guide fixing rod (46); The guide fixing rod (46) comprises a fixing portion (461) and a guiding portion (462), the fixing portion (461) is fixedly connected to the upper mold body (4), and the limiting plate (631) has a guiding hole (632) for the guiding portion (462) to pass through; The upper mold body (4) has a sliding groove (431) for the limiting plate (631) to slide, and the upper mold body (4) has a positioning surface (4311) in the sliding groove (431) for one end of the second elastic member (64) to abut against, and the other end of the second elastic member (64) abuts against the bottom of the limiting plate (631); The upper mold body (4) is also provided with a first protective structure (7) covering the bottom opening of the sliding groove (431), the first protective structure (7) comprising a first sliding block (71) horizontally slidably mounted on two opposite side walls of the sliding groove (431) and a third elastic member (72) for driving the first sliding block (71) to return to its original position, a driving inclined surface (712) being provided on a side of the first sliding block (71) facing the second push rod (63), when the second push rod (63) moves downward, the second push rod (63) abuts against the driving inclined surface (712) and drives the two first sliding blocks (71) to slide in a direction away from each other; The second push rod (63) is I-shaped, the sliding groove (431) is adapted to the second push rod (63), the upper mold body (4) is provided with a second protective structure (8) at the corner of the sliding groove (431), the second protective structure (8) comprises four second sliders (81), the four second sliders (81) form a rectangular plate, the sliding structure of the second slider (81) is consistent with the structure of the first slider (71), and the second protective structure (8) and the first protective structure (7) slide alternately in the height direction.

2. The upper ejector reset mechanism for the die holder of a hot forging device according to claim 1, characterized in that, The upper die body (4) is provided with a placement counterbore (45) for slidably mounting the first ejector rod (61). The first elastic member (62) is sleeved on the first ejector rod (61). The end of the first ejector rod (61) has a first limiting portion (611) for the first elastic member (62) to abut against, and the other end of the first elastic member (62) abuts against the stepped surface of the placement counterbore (45).

3. The upper ejector reset mechanism for the die holder of a hot forging device according to claim 2, characterized in that, The upper die body (4) is provided with at least three groups of the first ejector rods (61), and the first ejector rods (61) are arranged at equal intervals.

4. The upper ejector reset mechanism for the die holder of a hot forging device according to claim 1, characterized in that, The top of the fixing portion (461) and the top of the second ejector rod (63) both abut against the top wall of the sliding groove (431), and the depth of the sliding groove (431) is greater than the length of the second ejector rod (63) in the height direction.

5. The upper ejector reset mechanism for the die holder of a hot forging device according to claim 1, characterized in that, Sealing structures (9) are provided on the fitting sides of the corresponding first sliders (71) and the adjacent second sliders (81). The sealing structure (9) includes a first magnetic sheet (91), a second magnetic sheet (92), an annular groove (93) and an annular sealing ring (94). The first magnetic sheet (91) and the second magnetic sheet (92) are in suction fit, and the annular groove (93) and the annular sealing ring (94) are correspondingly arranged.

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