A multi-phase isothermal stamping die

Abstract

This application relates to a multi-isothermal stamping die, belonging to the field of stamping die technology. The multi-isothermal stamping die includes a lower stamping die, an upper main die base, and side die bases. The lower stamping die is provided with a lower die base for placing forgings. The side die bases include a left die base and a right die base. The left die base includes a left sliding block and a left die body disposed on the left sliding block. The right die base includes a right sliding block and a right die body disposed on the right sliding block. Both the left and right die bodies are equipped with a first heating element for heating. The lower die base is provided with a second heating element. The left and right die bodies abut to form a product forming cavity. The left die base, right die base, and lower stamping die are all provided with heat insulation structures to reduce heat loss. This application has the effect of heating the product forming cavity, ensuring the temperature stability of the stamping area, and improving the forming effect.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a multi-stage isothermal stamping mold. Background Technology

[0002] Stamping dies are key tools used in industrial production to apply pressure to metal or non-metal sheets to achieve separation or forming. They are widely used in various manufacturing industries and are characterized by high efficiency, precision, and material saving.

[0003] To improve material forming efficiency and reduce the probability of material breakage, some stamping dies involve heating the material to be stamped. A common heating method is to slide side die holders on opposite sides of the lower die holder, with heating elements installed inside the side die holders. The side die holders surround the material, and the heating elements heat the material, transferring the heat to it through the side die holders.

[0004] However, the heating method described above, because the side mold base is in direct contact with the outside, is prone to significant heat loss, resulting in frequent temperature changes in the stamping area and affecting the forming effect. Summary of the Invention

[0005] To ensure temperature stability in the stamping zone and improve forming effect, this application provides a multi-isothermal stamping die.

[0006] This application provides a multi-component isothermal stamping die with the following technical solution:

[0007] A multi-stage isothermal stamping die includes a lower stamping die, an upper main die base, and side die bases. The lower stamping die is provided with a lower die base for placing forgings. The side die bases include a left die base and a right die base. The left die base includes a left sliding block and a left die body disposed on the left sliding block. The right die base includes a right sliding block and a right die body disposed on the right sliding block. Both the left and right die bodies are equipped with a first heating element for heating. The lower die base is provided with a second heating element. The left and right die bodies abut against each other to form a product forming cavity. The left die base, the right die base, and the lower stamping die are all provided with heat insulation structures to reduce heat loss.

[0008] By adopting the above technical solution, when using the above stamping die, the product is placed on the lower die base, the side die bases are driven, and the left and right die bases move closer to each other towards the lower die base. The left and right die bodies abut against each other, forming a product forming cavity with a top opening, which also serves to position the product. Then, the upper main die base is activated, and the die head of the upper main die base is inserted into the product forming cavity to stamp the forging. During the stamping process, the left and right die bodies are heated by the first heating element, and the lower die base is heated by the second heating element, which raises the temperature of the side and bottom surfaces of the product forming cavity, improving the forming effect during stamping. The heat insulation structure reduces the heat transferred from the side die bases to the moving slider, achieving an energy-saving and heat-insulating effect, and making the temperature change of the product forming cavity more stable.

[0009] Optionally, the heat insulation structure includes a heat insulation plate that is fitted and installed on the left mold body / right mold body / lower mold base. The heat insulation plate has multiple positioning holes, and the left mold body / right mold body / lower mold base is provided with positioning protrusions that are inserted and engaged with the positioning holes.

[0010] By adopting the above technical solution, the composition of the heat insulation structure is disclosed. The heat insulation plate is fixed to the surface of the left mold body / right mold body / lower mold base by the cooperation of positioning holes and positioning protrusions. The installation structure is simple and easy to assemble. The heat insulation plate can reduce the heat transfer of the left mold body / right mold body / lower mold base.

[0011] Optionally, the left movable slider is provided with a left mounting groove for mounting the left mold body, and the right movable slider is provided with a right mounting groove for mounting the right mold body, and the positioning protrusion fits into the bottom of the left mounting groove / right mounting groove / stamping lower die.

[0012] By adopting the above technical solution, the left mold body and the right mold body are respectively installed in the mounting groove. The heat insulation plate and the positioning protrusion are attached to the inner wall of the left mounting groove / right mounting groove, so that the installation of the left mold body, the right mold body and the moving slider is relatively stable. Most of the area of ​​the left mold body / right mold body and the moving slider are indirectly abutted by the heat insulation plate, and a small part of the area is directly abutted by the moving slider through the positioning protrusion, which makes the heat conduction area small and the heat loss less.

[0013] Optionally, both the left mold body and the right mold body are provided with a first heating groove for the first heating element to be inserted, and the lower mold base is provided with a second heating groove for the second heating element to be inserted. Both the first heating element and the second heating element include a heating section for generating heat and a connecting section for connecting to a power source. The length of the heating section is less than that of the first heating groove / second heating groove.

[0014] By adopting the above technical solution, the first heating element is inserted into the left mold body and the right mold body through the first heating groove respectively. The structure of the first heating element and the second heating element is the same, both including a heating section and a connecting section. That is, the first heating element and the second heating element only generate heat in the left mold body / right mold body / lower mold base, so that the heat source is not directly transferred to the moving slider.

[0015] Optionally, the top plates of the left and right moving sliders are each provided with a first inclined surface on the side that is far apart from each other, and the bottom of the upper main mold base has a fitting groove for fitting the side mold base, and the fitting groove has a second inclined surface that abuts and cooperates with the first inclined surface.

[0016] By adopting the above technical solution, after the left and right mold bases are connected, the upper main mold base is activated, and the lower stamping die descends vertically towards the lower mold base, so that the sleeve groove and the side mold base are fitted together as a whole. The first inclined surface and the second inclined surface abut against each other, thereby locking the upper main mold base to the side mold base. This reduces the probability of the side mold base wobbling left and right during stamping and improves the forming effect of the forging.

[0017] Optionally, a stamping part is slidably disposed within the upper main mold base, and the stamping part is detachably disposed with a stamping die head that is inserted into the product forming cavity.

[0018] By adopting the above technical solution, after the sleeve groove and the side mold base are sleeved, the stamping part of the upper main mold base is started, and the stamping die head is inserted into the product forming cavity to realize the stamping forming of the forging. At this time, the side mold base is locked under the action of the first inclined surface and the second inclined surface, and the overall stamping process is relatively stable. The setting of the stamping die head allows the upper main mold base to install the appropriate stamping die head according to different products.

[0019] Optionally, the lower mold base is provided with a guide groove for guiding the left moving slider / right moving slider to slide, and the guide groove abuts against the inclined surface of the left moving slider / right moving slider.

[0020] By adopting the above technical solution, the guide groove can guide and limit the sliding of the left and right moving sliders. The inclined surface contact method reduces the probability of gaps and ensures the stability of the sliding.

[0021] Optionally, the lower mold base is provided with a limiting slide block on the side near the left mold base, the left mold body is provided with a limiting slide groove that cooperates with the limiting slide block, the left mold body is provided with a limiting post on the end face facing the right mold body, and the right mold body is provided with a limiting slot for the limiting post to be inserted.

[0022] By adopting the above technical solution, the cooperation of the limiting slide block and the limiting slide groove can lock the left mold base in the lower mold base, reducing the probability of the left mold base wobbling back and forth. The cooperation of the limiting slot and the limiting pin can connect the left mold base and the right mold base, reducing the probability of the right mold base wobbling back and forth.

[0023] Optionally, the left mold base / right mold base is further provided with a heat-insulating telescopic structure. The heat-insulating telescopic structure includes two sets of heat-insulating slide plates that are slidably installed on the left mold base and the right mold base respectively, and a reset elastic element connecting the heat-insulating slide plates. The end of the heat-insulating slide plate is provided with a driving inclined surface for the stamping die head to abut against. The stamping part has a second driving surface that pushes the heat-insulating slide plate. When the stamping die head is fully inserted into the product forming cavity, the heat-insulating slide plate is located in the left mold base / right mold base.

[0024] By adopting the above technical solution, the thermal insulation and expansion structure can seal the top opening of the product molding cavity after the left and right mold bases are connected, reducing heat leakage from the top of the product molding cavity and achieving multiple isothermal functions.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] This application, through the setting of a heat insulation structure, can reduce heat loss and conduction, and provide heat insulation for the inner wall of the product molding cavity, forming multiple isothermal effects and ensuring temperature stability;

[0027] By setting the first and second inclined surfaces, this application can achieve the locking effect of the upper main die holder on the two side die holders, reducing the probability of the forging shaking during stamping.

[0028] This application, through the setting of the thermal insulation and telescopic structure, can further improve multiple isothermal functions, reduce heat loss from the top opening of the product forming cavity, and at the same time, when the stamping die head descends, the thermal insulation slide automatically extends and retracts to the left moving slider / right moving slider. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0030] Figure 2 This is an exploded view of the side mold and the lower stamping die of Example 1.

[0031] Figure 3 This is a cross-sectional schematic diagram of the left and right side molds after they come into contact in Example 1.

[0032] Figure 4 This is the structure of the heat insulation plate of the left mold base and the lower mold base in Example 1.

[0033] Figure 5 This is a cross-sectional view of the left mold base and the lower mold base in the front-rear direction in Embodiment 1.

[0034] Figure 6 This is a schematic cross-sectional view of the main mold base after stamping in Example 1.

[0035] Figure 7 This is a schematic diagram of the right mold body limiting slot in Example 1.

[0036] Figure 8 This is a cross-sectional schematic diagram of Example 2.

[0037] Explanation of reference numerals in the attached drawings: 1. Lower stamping die; 11. Lower die base; 111. Placement protrusion; 112. Second heating groove; 113. Limiting slide; 12. Die base slide groove; 121. Guide slide groove; 13. Second heating element; 14. Anti-reverse mechanism; 2. Upper main die base; 21. Fitting groove; 211. Second inclined surface; 22. Stamping part; 221. Second driving surface; 23. Stamping die head; 3. Left side die base; 31. Left moving slider; 311. Left mounting groove; 312. First through groove; 313. Second through groove; 314. First inclined surface; 31 5. Installation slide; 316. Insulation surface; 32. Left mold body; 321. Positioning protrusion; 322. First heating groove; 323. Limiting slide; 33. Flange seat; 34. First heating element; 341. Heating section; 342. Connecting section; 35. Product forming cavity; 36. Limiting insert; 4. Right mold base; 41. Right moving slider; 411. Right mounting groove; 42. Right mold body; 421. Limiting slot; 5. Heat insulation plate; 51. Positioning hole; 6. Insulation sliding structure; 61. Insulation sliding plate; 611. Driving inclined surface; 62. Reset elastic element. Detailed Implementation

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0039] The following is in conjunction with the appendix Figure 1-8This application will be described in further detail.

[0040] This application discloses a multi-isothermal stamping die. Example

[0041] Reference Figure 1 and Figure 2 A multi-stage isothermal stamping die includes a lower stamping die 1, an upper main die base 2, and a side die base. The lower stamping die 1 has a lower die base 11 for placing forgings mounted on its top, and the top of the lower die base 11 has a placement protrusion 111 for positioning and placing forgings.

[0042] The side die base includes a left die base 3 and a right die base 4 located on both sides of the lower die base 11. The left die base 3 and the right die base 4 have the same overall structure and are both slidably mounted on the stamping lower die 1.

[0043] Combination Figure 3 The left mold base 3 includes a left sliding slider 31 and a left mold body 32 mounted on the left sliding slider 31. The right mold base 4 includes a right sliding slider 41 and a right mold body 42 mounted on the right sliding slider 41. Both the left sliding slider 31 and the right sliding slider 41 are fixedly mounted with flange seats 33 on their opposite sides. The flange seats 33 are threadedly connected to the hydraulic cylinder to achieve horizontal sliding of the left mold base 3 and the right mold base 4.

[0044] The stamping die 1 has a die holder slide groove 12 for mounting two side die holders. The opposite side walls of the die holder slide groove 12 have guide slide grooves 121 for guiding the sliding of the side die holders. The guide slide grooves 121 and the two side die holders are in inclined contact.

[0045] A backstop mechanism 14 is also installed on the top of the lower die 1. The backstop mechanism 14 is located on the side of the two side die seats that are far apart from each other. The backstop mechanism 14 includes a backstop plate that is detachably installed on the lower die 1. The backstop plate is L-shaped in general, and the top of the backstop plate is located in the die seat slide groove 12, so that the backstop plate can limit the sliding of the left and right die seats 4. Backstop plates of different widths are installed according to different shapes of forgings to ensure the positioning of the forgings.

[0046] Both the left mold body 32 and the right mold body 42 are fitted with a first heating element 34. A second heating element 13 is fitted through the lower mold base 11. The left mold body 32 and the right mold body 42 are rectangular blocks, with their length direction perpendicular to the sliding direction of the side mold bases. The left mold base 3 and the right mold base 4 move towards each other. When the left mold body 32 and the right mold body 42 abut, they together with the lower mold base 11 form a product forming cavity 35 with a top opening for insertion of the upper main mold base 2. In this embodiment, the stamping temperature of the forging needs to be maintained at 400-500℃.

[0047] Reference Figure 3 and Figure 4A heat insulation structure is provided between the left mold body 32 and the left sliding slider 31, the right mold body 42 and the right sliding slider 41, the lower mold base 11 and the top of the stamping lower mold 1. The heat insulation structure reduces the heat loss of the left mold body 32, the right mold body 42 and the lower mold base 11, ensures the temperature stability of the product molding cavity 35 and achieves energy saving effect.

[0048] The heat insulation structure includes a heat insulation plate 5, which is fitted onto the surfaces of the left mold body 32 and the right mold body 42, as well as the bottom of the lower mold base 11. The heat insulation plate 5 has multiple positioning holes 51 arranged in an array, penetrating both end faces. The left mold body 32, the right mold body 42, and the lower mold base 11 each have positioning protrusions 321 that engage with the positioning holes 51. In this embodiment, the positioning protrusions 321 are cylindrical, and their diameter matches the positioning holes 51, ensuring that after the heat insulation plate 5 is installed, the end face of the positioning protrusion 321 is flush with the surface of the heat insulation plate 5.

[0049] The left and right sliding blocks 31 and 41 each have corresponding left and right mounting grooves 311 and 411 on their respective sides for fixing the left and right mold bodies 32 and 42. The positioning protrusion 321 of the left mold body 32 and the heat insulation plate 5 are both fitted against the inner wall of the left mounting groove 311, and the positioning protrusion 321 of the right mold body 42 and the heat insulation plate 5 are both fitted against the inner wall of the right mounting groove 411. Both the left and right mold bodies 32 and 42 are fixed with bolts; therefore, multiple sets of bolt holes (not shown in the figure) are provided on the mutually distant sidewalls of the left and right mold bodies 32 and 42, with the bolt holes and positioning holes 51 interleaved. The heat insulation plate 5 also has through holes corresponding to the bolt holes.

[0050] Reference Figure 3 and Figure 5 The first heating element 34 and the second heating element 13 have the same structure, both including a heating section 341 and a connecting section 342. The left mold body 32, the right mold body 42, and the lower mold base 11 all have heating grooves for mounting the heating elements. The heating grooves of the left mold body 32 and the right mold body 42 are defined as the first heating groove 322, and the heating groove of the lower mold base 11 is defined as the second heating groove 112.

[0051] The first heating groove 322 is arranged along the length of the left mold body 32. The left moving slider 31 and the right moving slider 41 have first through grooves 312 corresponding to the first heating groove 322. The first heating element 34 passes through the first through groove 312 and the first heating groove 322 in sequence. There are gaps between the end of the first heating element 34 and the inner walls of the left mounting groove 311 and the right mounting groove 411, so as to reduce the heat transferred from the first heating element 34 to the moving slider.

[0052] Heating section 341 is a heat-generating area for generating heat, and connecting section 342 is a connection area for connecting heating section 341 and power supply. The length of heating section 341 of first heating element 34 is less than or equal to the length of first heating groove 322, so that the heat generated by first heating element 34 is not easily lost from the contact surface between connecting section 342 and first through groove 312.

[0053] The second heating groove 112 is arranged along the width direction of the left mold body 32, that is, the extension direction of the second heating element 13 is parallel to the sliding direction of the two side mold bases. Therefore, the left moving slider 31 has a second through groove 313 corresponding to the second heating element 13. The length of the heating section 341 of the second heating element 13 is less than or equal to the length of the second heating groove 112, so that the heat generated by the second heating element 13 is not easily lost from the contact surface of the connecting section 342 and the through groove 313.

[0054] Reference Figure 6 The upper main die base 2 is driven by a hydraulic cylinder. Its bottom has a mounting groove 21 for housing two side die bases, and the mounting groove 21 is rectangular. The top outer edges of the left moving slider 31 and the right moving slider 41 are evenly provided with first inclined surfaces 314. The inner wall of the mounting groove 21 has a second inclined surface 211 that abuts against the first inclined surface 314. When the two side die bases abut, the upper main die base 2 moves downward, causing the mounting groove 21 to fit onto the two side die bases. Simultaneously, the first inclined surface 314 and the second inclined surface 211 engage, locking the upper main die base 2 and the side die bases and reducing the probability of the forging moving laterally during stamping. A stamping part 22 corresponding to the product forming cavity 35 is installed inside the upper main die base 2, and the stamping part 22 is driven by a hydraulic cylinder. The bottom of the stamping part 22 is equipped with a stamping die head 23. After the upper main mold base 2 locks the side mold base, the stamping part 22 is started, so that the stamping die head 23 is inserted into the product forming cavity 35.

[0055] Reference Figure 4 and Figure 7 To reduce the probability of back-and-forth movement of the side mold base, the lower mold base 11 has an integrally formed limiting slide 113 at the top near the left mold base 3, and the bottom of the left mold body 32 has a limiting slide groove 323 that mates with the limiting slide 113. The left mold body 32 also has a limiting pin 36 on the end face facing the right mold body 42. The limiting pin 36 and the left mold body 32 are fixed by bolts or other means, and the right mold body 42 has a limiting slot 421 for the limiting pin 36 to be inserted. The connection between the left and right mold bodies 42 is achieved through the cooperation of the limiting slot 421 and the limiting pin 36.

[0056] The cooperation of the first heating groove 322 and the limiting slide 113, and the cooperation of the first inclined surface 314 and the second inclined surface 211, enables the left mold body 32 and the right mold body 42 to be locked in all directions, ensuring stability during stamping.

[0057] Example 2: Compared with Example 1, this example of the application is identical to Example 1 except that a thermal insulation sliding structure is added.

[0058] Reference Figure 8 To further ensure the temperature stability of the product molding cavity 35, the left mold base 3 and the right mold base 4 are also equipped with a thermal insulation sliding structure 6. The thermal insulation sliding structure 6 includes two sets of thermal insulation sliding plates 61 respectively installed on the two side mold bases and a reset elastic element 62 connecting the thermal insulation sliding plates 61. The thermal insulation sliding plates 61 are made of thermal insulation material.

[0059] The left and right sliding blocks 31 and 41 have mounting grooves 315 for mounting the insulation slide plate 61, and the mounting grooves 315 are arranged horizontally. The reset elastic element 62 is a rectangular spring, and its two ends are fixed to the inner wall of the mounting groove 315 and the insulation slide plate 61.

[0060] When the left mold base 3 and the right mold base 4 abut together, the two insulating slide plates 61 also abut each other to form an insulating plate. The insulating plate covers the top opening of the product molding cavity 35, thus reducing the heat loss from the top of the product molding cavity 35. The insulating slide plate 61 has a driving slope 611 at the end away from the mounting groove 315. The two driving slopes 611 gradually slope towards each other from top to bottom, but the insulating slide plate 61 still has a rectangular contact surface below the driving slope 611. That is, the cross-section of the insulating slide plate 61 in the height direction is a right trapezoid, which is used to ensure the heat insulation area after the two insulating slide plates 61 abut together.

[0061] The driving inclined surface 611 is designed so that after the heat insulation plate 61 comes into contact with the other side, a driving groove with an inverted triangular cross section is formed. The width of the driving groove is greater than the width of the stamping die head 23, so that when the stamping die head 23 is inserted downwards, it can drive the two heat insulation plate 61 to move away from each other.

[0062] The side wall of the stamped part 22 also has a second driving surface 221 for pushing the heat-insulating slide plate 61, through which the heat-insulating slide plate 61 is fully pushed into the mounting groove 315. The left moving slider 31 and the right moving slider 41 have heat-insulating surfaces 316 at the bottom of the heat-insulating slide plate 61 that fit with the second driving surface 221, which are used to ensure the fit between the stamped part 22 and the side mold base and reduce heat loss.

[0063] The implementation principle of a multi-isothermal stamping die in this application embodiment is as follows: the forging is placed on the positioning protrusion 321 of the lower die base 11, the horizontal hydraulic cylinder is activated, the left die base 3 and the right die base 4 move towards each other, and the product forming cavity 35 formed after the two side die bases abut against each other positions the forging. At this time, the heat preservation slide plate 61 is in a close-fitting state.

[0064] The left mold body 32 and the right mold body 42 are heated by the first heating element 34, and the lower mold base 11 is heated by the second heating element 13. When the temperature reaches 400-500℃, the upper main mold base 2 is activated, and the stamping die head 23 is inserted into the product forming cavity 35 to stamp the forging.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-stage isothermal stamping die, comprising a lower stamping die (1), an upper main die base (2), and side die bases, wherein the lower stamping die (1) is provided with a lower die base (11) for placing forgings, and the side die bases include a left die base (3) and a right die base (4), characterized in that, The left mold base (3) includes a left sliding block (31) and a left mold body (32) disposed on the left sliding block (31); the right mold base (4) includes a right sliding block (41) and a right mold body (42) disposed on the right sliding block (41); both the left mold body (32) and the right mold body (42) are equipped with a first heating element (34) for heating; the lower mold base (11) is provided with a second heating element (13); the left mold body (32) and the right mold body (42) abut against each other to form a product forming cavity (35); the left mold base (3), the right mold base (4) and the stamping lower mold (1) are all provided with a heat insulation structure to reduce heat loss; The heat insulation structure includes a heat insulation plate (5) that is fitted and installed on the left mold body (32) / right mold body (42) / lower mold base (11). The heat insulation plate (5) has multiple positioning holes (51). The left mold body (32), right mold body (42) and lower mold base (11) are provided with positioning protrusions (321) that are inserted and engaged with the positioning holes (51). The left mold body (32) and the right mold body (42) are each provided with a first heating groove (322) for the first heating element (34) to be inserted, and the lower mold base (11) is provided with a second heating groove (112) for the second heating element (13) to be inserted. The first heating element (34) and the second heating element (13) each include a heating section (341) for generating heat and a connecting section (342) for connecting to a power source. The length of the heating section (341) is less than that of the first heating groove (322) and the second heating groove (112). The upper main mold base (2) is slidably provided with a stamping part (22), and the stamping part (22) is provided with a stamping die head (23) that is inserted into the product forming cavity (35). The left mold base (3) / right mold base (4) is also provided with a heat-insulating telescopic structure. The heat-insulating telescopic structure includes two sets of heat-insulating slide plates (61) that are respectively slidably installed on the left mold base (3) and the right mold base (4) and a reset elastic element (62) connecting the heat-insulating slide plates (61). The end of the heat-insulating slide plate (61) is provided with a driving inclined surface (611) for the stamping die head (23) to abut. The stamping part (22) has a second driving surface (221) for pushing the heat-insulating slide plate (61). When the stamping die head (23) is fully inserted into the product forming cavity (35), the heat-insulating slide plate (61) is located in the left mold base (3) / right mold base (4).

2. The multi-component isothermal stamping die according to claim 1, characterized in that, The left moving slider (31) is provided with a left mounting groove (311) for mounting the left mold body (32), and the right moving slider (41) is provided with a right mounting groove (411) for mounting the right mold body (42). The positioning protrusion (321) fits into the bottom / left mounting groove (311) / right mounting groove (411) of the stamping lower die (1).

3. A multi-stage isothermal stamping die according to claim 1, characterized in that, The top of the left moving slider (31) and the right moving slider (41) are provided with a first inclined surface (314) on the side away from each other. The bottom of the upper main mold base (2) has a sleeve groove (21) for sleeved on the side mold base. The sleeve groove (21) has a second inclined surface (211) that abuts and cooperates with the first inclined surface (314).

4. A multi-stage isothermal stamping die according to claim 1, characterized in that, The lower mold base (11) is provided with a guide groove (121) for guiding the left moving slider (31) / right moving slider (41) to slide. The guide groove (121) and the inclined surfaces of the left moving slider (31) / right moving slider (41) abut against each other.

5. A multi-stage isothermal stamping die according to claim 1, characterized in that, The lower mold base (11) is provided with a limiting slide (113) on the side near the left mold base (3), the left mold body (32) is provided with a limiting slide groove (323) that cooperates with the limiting slide (113), the left mold body (32) is provided with a limiting pin (36) on the end face facing the right mold body (42), and the right mold body (42) is provided with a limiting slot (421) for the limiting pin (36) to be inserted.

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