Backward extrusion discharging tool

Abstract

The utility model discloses a backward extrusion unloading tool which is characterized in that the backward extrusion unloading tool comprises an upper die assembly, a lower die assembly installed in cooperation with the upper die assembly and a plurality of unloading hook assemblies, the upper die assembly is connected to the output end of a press, and a punch of the upper die assembly is matched with a forming cavity of the lower die assembly to work; the multiple discharging hook assemblies are distributed and installed on the top end face of a lower die of the lower die assembly in the circumferential direction, and the hook ends of the discharging hook assemblies are matched with the top face of a forge piece for limiting, so that the forge piece is prevented from rising along with a punch of the upper die assembly. The device is simple in structure, discharging is convenient and fast, the discharging speed is greatly increased, and the production efficiency of forgings can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of die forging, in particular to a reverse extrusion unloading tool. Background Art

[0002] During the reverse extrusion forging process, the forging shrinks due to cold shrinkage, resulting in the size of the upper end of the forging becoming smaller, which makes it easy for the punch to get stuck inside the forging. When the upper die is lifted, the forging will stick to the punch and be lifted along with the upper die, resulting in the punch being unable to be pulled out without external force, and the forging being unable to be ejected from the die normally. The existing technology generally uses a forklift to remove the forging, but this method is slow and inefficient, which seriously affects the production efficiency of forgings. Utility Model Content

[0003] In order to solve the technical defects of the prior art, the utility model proposes a reverse extrusion unloading tooling, which has a simple device structure and is convenient for unloading, greatly improves the unloading speed, and is conducive to improving the production efficiency of forgings.

[0004] The main technical solutions adopted in this utility model are:

[0005] A reverse extrusion unloading tool comprises an upper die assembly, a lower die assembly mounted in cooperation with the upper die assembly and a plurality of unloading hook assemblies, wherein the upper die assembly is connected to the output end of a press machine, and the punch of the upper die assembly cooperates with the forming cavity of the lower die assembly, and a plurality of the unloading hook assemblies are circumferentially distributed and mounted on the top end surface of the lower die of the lower die assembly, and the bent hook end of the unloading hook assembly cooperates with the top surface of the forging to limit the forging, thereby preventing the forging from rising with the punch of the upper die assembly.

[0006] Preferably, the discharge hook assembly comprises a discharge hook with a bent hook end and a mounting seat, the mounting seat is fixedly arranged on the top end surface of the lower mold, and one end of the discharge hook away from the bent hook end is rotatably mounted on the mounting seat.

[0007] Preferably, the lower mold assembly includes a lower mold, a lower mold pressure plate, a lower mold pad, a push rod and a support plate, wherein the lower mold is fixed to the lower mold pad by the lower mold pressure plate, the lower mold is designed with a molding cavity, and the bottom of the molding cavity is provided with a push rod through groove, the push rod limiter is installed at the bottom of the molding cavity, and the bottom of the push rod passes through the push rod through groove, the lower mold pad is provided with a support plate through groove, and the push rod through groove is connected with the support plate through groove, the support plate is movably installed in the support plate through groove, and the top surface of the support plate is designed with a concave arc surface for driving the push rod to move up and down.

[0008] Preferably, the upper die assembly includes an upper die pad, an upper die pressing ring, a punch and an upper die rod. The upper die pad is connected to the output end of the press, the top end of the upper die rod is installed on the bottom surface of the upper die pad through the upper die pressing ring, and the bottom end of the upper die rod on which the punch is installed is used for stamping forgings in the forming cavity.

[0009] Preferably, a plurality of guide components are provided between the upper die pad and the lower die pad to guide the upper die assembly to move up and down.

[0010] Preferably, the guide assembly includes a guide sleeve and a guide rod, one end of the guide sleeve is fixedly mounted on the lower mold pad, and the other end is mounted on the top of the lower mold through a fixing plate, one end of the guide rod is installed in the guide sleeve, and the other end is fixedly mounted on the upper mold pad.

[0011] Beneficial effects: The utility model provides a reverse extrusion unloading tooling, which has the following advantages:

[0012] (1) The utility model uses a discharge hook assembly to limit the forging moving upward with the upper die, and the discharge hook provides a downward pulling force to separate the forging from the punch, thereby reducing the time of discharging during the production process and helping to improve the production efficiency of forgings.

[0013] (2) The utility model utilizes the concave arc surface of the support plate to cooperate with the ejector rod to realize the up and down movement of the ejector rod, which is easy to operate and quick to eject and demold, further improving the production efficiency of forgings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1;

[0015] Figure 2 is a vertical partial cross-sectional schematic diagram of the present embodiment 1;

[0016] Figure 3 This is a schematic diagram of the installation of the top rod and the support plate of this embodiment 1;

[0017] In the figure: upper die assembly 1, upper die pad 1-1, upper die pressure ring 1-2, punch 1-3, upper die rod 1-4, lower die assembly 2, lower die 2-1, lower die pressure plate 2-2, lower die pad 2-3, support plate through groove 2-31, push rod 2-4, support plate 2-5, concave arc surface 2-51, forming cavity 2-6, unloading hook assembly 3, unloading hook 3-1, mounting seat 3-2, guide assembly 4, guide sleeve 4-1, guide rod 4-2, fixing plate 4-3, forging 5. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in conjunction with the accompanying drawings and embodiments. The following description of the specific implementation is only exemplary, and it should be understood that the specific implementation described here is only used to explain the utility model, and is by no means a limitation of the utility model and its application or usage.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. On the contrary, when an element is referred to as being "directly" connected to another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" 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 present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. Embodiment 1:

[0021] like Figure 1-3 As shown, a reverse extrusion unloading tool comprises an upper die assembly 1, a lower die assembly 2 installed in cooperation with the upper die assembly 1, and a plurality of unloading hook assemblies 3, wherein the upper die assembly 1 is connected to the output end of the press, and the punches 1-3 of the upper die assembly 1 cooperate with the forming cavity of the lower die assembly 2, and the plurality of unloading hook assemblies 3 are circumferentially distributed and installed on the top surface of the lower die 2-1 of the lower die assembly 2, and the bent hook ends of the unloading hook assemblies 3 cooperate with the top surface of the forging 5 to limit the forging 5 to prevent the forging 5 from rising with the punches 1-3 of the upper die assembly 1.

[0022] Preferably, the discharge hook assembly 3 comprises a discharge hook 3-1 with a bent hook end and a mounting seat 3-2, the mounting seat 3-2 is fixedly arranged on the top surface of the lower mold 2-1, and the end of the discharge hook 3-1 away from the bent hook end is rotatably mounted on the mounting seat 3-2.

[0023] In the utility model, the discharge hook 3-1 and the mounting seat 3-2 can be designed to be detachably connected, and the size of the discharge hook can be replaced according to actual needs.

[0024] In this embodiment 1, when the discharge hook 3-1 is in the initial state during the stamping stage, the discharge hook 3-1 rotates downward and away from the forging. When the punch needs to be separated, the discharge hook 3-1 only needs to be rotated upward so that the bent hook end of the discharge hook 3-1 can cooperate with the top surface of the forging 5 to limit the position. Figure 2 shown.

[0025] Preferably, the lower mold assembly 2 includes a lower mold 2-1, a lower mold pressure plate 2-2, a lower mold pad 2-3, a push rod 2-4 and a support plate 2-5, wherein the lower mold 2-1 is fixed on the lower mold pad 2-3 through the lower mold pressure plate 2-2, a molding cavity 2-6 is designed on the lower mold 2-1, and a push rod through groove is provided at the bottom of the molding cavity 2-6, the push rod 2-4 is limitedly installed at the bottom of the molding cavity 2-6, and the bottom of the push rod 2-4 passes through the push rod through groove, a support plate through groove 2-31 is provided in the lower mold pad 2-3, and the push rod through groove is connected with the support plate through groove 2-31, the support plate 2-5 is movably installed in the support plate through groove 2-31, and the top surface of the support plate 2-5 is designed with a concave arc surface 2-51, which is used to drive the push rod 2-4 to move up and down.

[0026] In this embodiment 1, during the stamping stage, the push rod 2-4 is in the initial state, at which time the bottom end of the push rod 2-4 contacts the lowest point of the concave arc surface 2-51 on the top surface of the support plate 2-5. When the forging needs to be ejected, the support plate 2-5 only needs to be pulled out from one end, and the push rod 2-4 moves upward along with the concave arc surface 2-51. Figure 3 shown.

[0027] Preferably, the upper die assembly 1 includes an upper die pad 1-1, an upper die pressing ring 1-2, a punch 1-3 and an upper die rod 1-4, the upper die pad 1-1 is connected to the output end of the press, the top end of the upper die rod 1-4 is installed on the bottom surface of the upper die pad 1-1 through the upper die pressing ring 1-2, and the bottom end of the upper die rod 1-4 on which the punch 1-3 is installed is used for stamping the forging 5 in the forming cavity.

[0028] Preferably, a plurality of guide components 4 are provided between the upper die pad 1 - 1 and the lower die pad 2 - 3 for guiding the upper die component 1 to move up and down.

[0029] Preferably, the guide assembly 4 includes a guide sleeve 4-1 and a guide rod 4-2, one end of the guide sleeve 4-1 is fixedly mounted on the lower mold pad 2-3, and the other end is mounted on the top of the lower mold 2-1 through a fixed plate 4-3, one end of the guide rod 4-2 is installed in the guide sleeve 4-1, and the other end is fixedly mounted on the upper mold pad 1-1.

[0030] The working principle of the utility model is as follows:

[0031] After the upper die assembly 1 and the lower die assembly 2 cooperate to complete the stamping of the forging 5, the punch 1-3 needs to be separated from the forging 5. At this time, the discharge hook 3-1 needs to be rotated to a vertical state so that its hook end can cooperate with the top surface of the forging 5 to abut against the limit. While the punch 1-3 moves upward with the upper die rod 1-4, although the forging will be subjected to an upward force due to the cold shrinkage and the clamping of the punch 1-3, due to the limiting effect of the discharge hook 3-1, the forging 5 touches the discharge hook 3-1 during the process of rising with the punch 1-3, and is pulled down by the discharge hook 3-1, so that the forging 5 is separated from the punch 1-3. Then, the support plate 2-5 is pulled out, so that the top rod 2-4 moves upward, and the forging 5 can be separated and disengaged from the lower die 2-1.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A reverse extrusion unloading tool, characterized in that: It includes an upper die assembly, a lower die assembly installed in cooperation with the upper die assembly, and a plurality of unloading hook assemblies. The upper die assembly is connected to the output end of the press, and the punch of the upper die assembly cooperates with the forming cavity of the lower die assembly. The plurality of unloading hook assemblies are circumferentially distributed and installed on the top surface of the lower die of the lower die assembly, and the bent hook end of the unloading hook assembly cooperates with the top surface of the forging to limit the forging to prevent the forging from rising with the punch of the upper die assembly.

2. The reverse extrusion unloading tool according to claim 1, characterized in that: The unloading hook assembly comprises a unloading hook with a bent hook end and a mounting seat, wherein the mounting seat is fixedly arranged on the top end surface of the lower mold, and one end of the unloading hook away from the bent hook end is rotatably mounted on the mounting seat.

3. The reverse extrusion unloading tool according to claim 1, characterized in that: The lower die assembly includes a lower die, a lower die pressing plate, a lower die pad, a push rod and a support plate, wherein the lower die is fixed to the lower die pad by the lower die pressing plate, a molding cavity is designed on the lower die, and a push rod through groove is provided at the bottom of the molding cavity, the push rod limiter is installed at the bottom of the molding cavity, and the bottom of the push rod passes through the push rod through groove, a support plate through groove is provided in the lower die pad, and the push rod through groove is connected with the support plate through groove, the support plate is movably installed in the support plate through groove, and the top surface of the support plate is designed with a concave arc surface for driving the push rod to move up and down.

4. The reverse extrusion unloading tool according to claim 3 is characterized in that: The upper die assembly includes an upper die pad, an upper die pressing ring, a punch and an upper die rod. The upper die pad is connected to the output end of the press. The top end of the upper die rod is installed on the bottom surface of the upper die pad through the upper die pressing ring. The bottom end of the upper die rod on which the punch is installed is used for stamping and forming forgings in the cavity.

5. The reverse extrusion unloading tool according to claim 4, characterized in that: A plurality of guide components are arranged between the upper die pad and the lower die pad to guide the upper die assembly to move up and down.

6. The reverse extrusion unloading tool according to claim 5, characterized in that: The guide assembly includes a guide sleeve and a guide rod, one end of the guide sleeve is fixedly mounted on the lower die pad, and the other end is mounted on the top of the lower die through a fixing plate, one end of the guide rod is installed in the guide sleeve, and the other end is fixedly mounted on the upper die pad.

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