Forging device and forging method

Abstract

The present application provides a forging device and a forging method for an excavator bucket tooth. The forging device includes a first module arranged along the length direction of a preform, a second module arranged along the width direction of the preform, and a third module arranged along the thickness direction of the preform. The first module, the second module, and the third module enclose to form a die cavity for pressing the preform. After the die is closed, the first module and the third module are clamped. An intermediate plate for forming the inner side of the preform is provided on the third module, and the third module is inserted through the intermediate plate. This device replaces traditional casting with forging, is suitable for producing products with complex shapes, can greatly improve the comprehensive performance of the products, and reduces production costs and energy consumption.

Description

Technical Field

[0001] This application relates to the technical field of bucket tooth manufacturing, and particularly relates to a forging device and a forging method for an excavator bucket tooth. Background Art

[0002] The working conditions of the integral double-leg excavator bucket tooth are harsh, and the main failure forms of the bucket tooth are fracture and surface wear. Therefore, this requires that the bucket tooth must have high hardness and wear resistance, and at the same time, it must have strong toughness that does not break or bend. The integral double-leg excavator bucket tooth has a complex shape, and currently, the casting process is generally used for production. However, the comprehensive performance of the bucket tooth produced by casting is low, and it is easy to wear or break during use, resulting in a high replacement frequency and high use cost. Summary of the Invention

[0003] To solve the above technical problems, according to one aspect of the present application, there is provided a forging device for an excavator bucket tooth, including a first module arranged along the length direction of the preform, a second module arranged along the width direction of the preform, and a third module arranged along the thickness direction of the preform. The first module, the second module, and the third module enclose to form a die cavity for pressing the preform. After the die is closed, the first module and the third module are clamped, and the third module is provided with an intermediate plate for forming the inner side of the preform, and the third module is inserted through the intermediate plate.

[0004] Optionally, the preform is formed by multi-directional extrusion.

[0005] Optionally, the first module includes a fixed front die and a movable rear die, and both the front die and the rear die are provided with grooves extending along the length direction of the preform.

[0006] Optionally, the third module includes a fixed lower die and a movable upper die, the front die is fixed above the lower die, and the upper die has a protrusion adapted to the groove.

[0007] Optionally, the second module includes a movable left die and a movable right die, and the left die and the right die are located above the lower die.

[0008] Optionally, the intermediate plate penetrates through the lower die, the upper die has a slot adapted to the intermediate plate, and the intermediate plate can be movably inserted into the slot.

[0009] Optionally, the top of the intermediate plate has a taper.

[0010] Optionally, the left die, the right die, the rear die, the upper die, and the intermediate plate are respectively fixedly connected to a connecting rod.

[0011] Optionally, the connecting rod is in transmission connection with the power device.

[0012] According to another aspect of the present application, a forging method for an excavator bucket tooth is provided. The forging device described above is used to forge the excavator bucket tooth. The forging method includes the following steps: Step S1, heating the round bar stock in an intermediate frequency furnace to 900 - 1150 °C; Step S2, making the preform by subjecting the round bar stock to the first multi-directional extrusion; Step S3, transferring the preform to the die cavity; Step S4, moving the intermediate plate upward and inserting it into the card slot; Step S5, respectively extruding the preform from both sides by the left die and the right die to a preset position; Step S6, resetting the upper die, the left die, and the right die, and taking out the forging.

[0013] According to the technical solution of the present application, the preform is placed in the die cavity. The upper die moves downward and the intermediate plate moves upward, so that the intermediate plate is inserted into the card slot to ensure that the preform does not shake in the horizontal plane. The left die and the right die respectively extrude from both sides to the preset position at the same time, and finally a forging is formed. This device makes the round bar stock into a preform through the first multi-directional extrusion, and then makes the forging through the second multi-directional extrusion of the preform. It replaces traditional casting with forging, is suitable for producing products with complex shapes, can greatly improve the comprehensive performance of the products, and reduces the production cost and energy consumption. Description of the Drawings

[0014] Figure 1 Schematic diagram of an embodiment of the forging device of the present application;

[0015] Figure 2 is Figure 1 schematic diagram after closing the die;

[0016] Figure 3 is Figure 2 cross-sectional schematic diagram of;

[0017] Figure 4 is Figure 2 top view schematic diagram of;

[0018] Figure 5 is Figure 2 front view schematic diagram of;

[0019] Figure 6 Schematic diagram of the extrusion forming of the round bar stock;

[0020] Figure 7 is Figure 6 cross-sectional schematic diagram of;

[0021] Figure 8 Flow chart of the present application. Detailed Description of the Invention

[0022] According to the concept of the present application, an embodiment of a forging device for excavator bucket teeth is provided in conjunction with the accompanying drawings. Figures 1 to 8 First, the round bar material 1 is made into a preform 2 through a first multi-directional extrusion, and then the preform 2 is formed into a forging 3 through a second multi-directional extrusion. Forging replaces traditional casting, which is suitable for producing products with complex shapes, can greatly improve the comprehensive performance of the products, and reduce production costs and energy losses.

[0023] Specifically, the forging device for excavator bucket teeth of the present application includes a first die group arranged along the length z direction of the preform, a second die group arranged along the width y direction of the preform, and a third die group arranged along the thickness x direction of the preform, and the first die group, the second die group and the third die group are enclosed to form a mold cavity for pressing the preform 2. After closing the mold, the first die group and the third die group are clamped, and the third die group is provided with an intermediate plate 210 for forming the inner side of the preform 2, and the third die group is plugged in through the intermediate plate 210.

[0024] In this embodiment, the first die set includes a fixed front die 140 and a movable rear die 610, and the front die 140 and the rear die 610 are both provided with a groove 141 extending along the length z direction of the preform 2; the second die set includes a movable left die 510 and a movable right die 410, and the left die 510 and the right die 410 are located above the lower die 120; the third die set includes a fixed lower die 120 and a movable upper die 310, and the front die 140 is fixedly arranged on Above the lower mold 120, the upper mold 310 has a protrusion 321 that is adapted to the groove 141; the lower mold 120 is penetrated by an intermediate plate 210, and the upper mold 310 has a slot 311 that is adapted to the intermediate plate 210, and the intermediate plate 210 can be movably inserted in the slot 311; through the cooperation between the protrusion 321 and the groove 141 and the cooperation between the intermediate plate 210 and the slot 311, it can be ensured that the upper mold 310 does not deviate in the horizontal plane, thereby playing the role of fixing the upper mold 310.

[0025] In this embodiment, in order to ensure that the middle plate 210 can be smoothly inserted into the slot 311 , the top of the middle plate 210 has a taper of 5°.

[0026] In addition, the left mold 510 and the left connecting rod 500 are fixedly connected by the connecting plate 700 and the bolt 710, the right mold 410 and the right connecting rod 400, the rear mold 610 and the rear connecting rod 600, the upper mold 310 and the upper connecting rod 320, and the middle plate 210 and the lower connecting rod 200 are all fixedly connected;

[0027] And each connecting rod is transmission connected with the power device.

[0028] In this embodiment, the preform is made by a multi-directional extrusion die, and the specific steps are as follows: The round bar stock is heated to 900 - 1150 °C by medium-frequency heating. ① The front die 50 is fixed, the left die 40 and the right die 30 are in the set positions, the rear punch 60 is in the open state (set position), and the upper punch 10 is in the open state (not closed, set position). The heated bar stock 1 is horizontally placed into the cavity formed by the lower die 20, the left die 40, the right die 30, and the front die 50, and one end face of the bar stock 1 is basically in contact with the front die 50, with a distance of about 3 mm. ② The upper die 10 moves downward until it contacts the left die 40 and the right die 30 and then stops moving, and the bar stock 1 is flattened. ③ The left die 40 and the right die 30 start to move towards each other simultaneously and stop moving when reaching the predetermined position. The left die 40 and the right die 30 are 12 mm apart. ④ The rear punch 60 moves forward and stops moving when reaching the predetermined position, completing the splitting and material distribution of the fork-shaped part, and the forming is completed. ⑤ The rear punch 60 retracts to the initial set position, the upper die 10 opens to the initial set position, the left die 40 and the right die 30 respectively return to the initial set positions, and the preform 2 is taken out, thus completing one cycle.

[0029] In this embodiment, the shape of the preform 2 is obtained based on theoretical calculations and actual tests. In particular, for the two fork-shaped parts of the preform 2, the cross-sectional areas at each part are basically close to the cross-sectional areas of the corresponding positions of the forging 3; the length dimension of the preform 2 is smaller than the length dimension of the forging 3.

[0030] In this embodiment, the preform 2 needs to be reheated after being made. However, if rapid die forging is used, reheating is not required.

[0031] According to another aspect of the present application, a forging method for an excavator bucket tooth is provided. The forging device described above is used to forge the excavator bucket tooth. The forging method includes the following steps: Step S1, heating the round bar stock 1 to 900 - 1150 °C in a medium-frequency furnace; Step S2, the round bar stock 1 is made into a preform 2 through the first multi-directional extrusion; Step S3, transferring the preform 2 into the die cavity; Step S4, the intermediate plate 210 moves upward and inserts into the card slot 311. At this time, the upper die 310 has moved into place and is clamped with the front die 140 and the rear die 610; Step S5, the left die 500 and the right die 400 respectively extrude the preform 2 from both sides to the preset position; Step S6, the upper die 300, the left die 500, and the right die 400 return to their original positions, and the forging 3 is taken out.

[0032] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: 1) It is applicable to products with complex shapes; 2) It can greatly improve the comprehensive performance of the products and extend the service life of the products; 3) It can reduce production costs and energy consumption.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A forging method for an excavator bucket tooth, wherein the forging method uses a forging device to forge the excavator bucket tooth, and is characterized in that, The forging device includes a first module arranged along the length direction of the preform, a second module arranged along the width direction of the preform, and a third module arranged along the thickness direction of the preform. The first module, the second module, and the third module enclose to form a mold cavity for pressing the preform. After the mold is closed, the first module and the third module are clamped. The third module is provided with an intermediate plate for forming the inner side of the preform, and the third module is inserted through the intermediate plate. The preform is formed by multi-directional extrusion. The first module includes a fixed front mold and a movable rear mold. Both the front mold and the rear mold are provided with grooves extending along the length direction of the preform. The third module includes a fixed lower mold and a movable upper mold. The front mold is fixed above the lower mold. The upper mold has a protrusion adapted to the groove. The second module includes a movable left mold and a movable right mold. The left mold and the right mold are located above the lower mold. The intermediate plate penetrates through the lower mold. The upper mold has a card slot adapted to the intermediate plate. The intermediate plate can be movably inserted into the card slot after passing through the two fork-shaped intermediates of the preform. The forging method includes the following steps: Step S1, heating the round bar stock in an intermediate frequency furnace to 900 - 1150 °C; Step S2, making the preform by the first multi-directional extrusion of the round bar stock; Step S3, transferring the preform to the mold cavity; Step S4, the intermediate plate moves upward and inserts into the card slot; Step S5, the left mold and the right mold respectively extrude the preform from both sides to a preset position; Step S6, the upper mold, the left mold, and the right mold return to their original positions, and the forging is taken out.

2. The forging method according to claim 1, wherein The top of the intermediate plate has a taper.

3. The forging method according to claim 2, wherein The left mold, the right mold, the rear mold, the upper mold, and the intermediate plate are respectively fixedly connected to a connecting rod.

4. The forging method according to claim 3, characterized in that, The connecting rod is in transmission connection with a power device.

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