A mold for a special-shaped counterweight and a processing method using the same

Abstract

The present invention relates to the technical field of counterweight blocks, and discloses a mold for special-shaped counterweight blocks and a processing method using the same, including a first lower mold. A upper mold is rotatably connected to the top of the first lower mold. A second forming groove is provided at the bottom of the upper mold, and the vertical cross-section of the second forming groove is semi-circular. A second lower mold is provided on the front side of the first lower mold. For the mold for special-shaped counterweight blocks and the processing method using the same, by moving the first lower mold forward, the fixed rod moves forward inside the positioning groove. When the power rod moves to the right, the rotating plate slides out of the inside of the chute through the inclined surface of the chute, so that the top of the rotating plate contacts the bottom of the power rod. Through the power rod, workers can use the mold to process the counterweight blocks more conveniently, and at the same time, the fixing of the mold is more firm, so that the mold will not loosen when processing the counterweight blocks.

Description

Technical Field

[0001] The invention relates to the technical field of counterweight blocks, in particular to a mold for a special-shaped counterweight block and a processing method thereof. Background Art

[0002] The counterweight is a heavy object used to increase its own weight to maintain balance. At present, the existing processing method for the arc of some special-shaped counterweights with an arc of R430 (R is 430mm) for gas turbines adopts a vise combined with a die tooling. The processing process is a single cold processing. A cylindrical rod is placed in the middle of the die, and then the die is placed in the vise. The die is pinched with the vise and pressurized until there is no gap between the die and the punch to obtain the counterweight. However, the arc of the special-shaped counterweight after processing does not meet the requirements. At this time, the method of bending with manual pliers is often used for correction, but the effect is not ideal, resulting in errors in the size of the processed special-shaped counterweight, resulting in waste. In addition, the manual benching method is time-consuming and labor-intensive. At the same time, the formed counterweight is not easy to demold because it fits the mold. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In response to the shortcomings of the existing technology, the present invention provides a mold for a special-shaped counterweight block and a processing method using the same, which has the advantages of making it easier to remove the formed counterweight block, and solves the problem that the arc curvature of the processed special-shaped counterweight block does not meet the requirements. At this time, the method of bending with manual pliers is often used for correction, but the effect is not ideal, resulting in errors in the size of the processed special-shaped counterweight block, causing waste, and the manual pliers method is time-consuming and labor-intensive. At the same time, the formed counterweight block is not easy to demold because it fits the mold.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a mold for a special-shaped counterweight block and a processing method thereof, comprising a first lower mold, the top of the first lower mold being rotatably connected to an upper mold, the bottom of the upper mold being provided with a second molding groove, the vertical cross-section of the second molding groove being semicircular, a second lower mold being provided on the front side of the first lower mold, the tops of the first lower mold and the second lower mold being provided with a first molding groove, a fixing rod being fixedly connected to the front side of the first lower mold, the top of the fixing rod being provided with a first fixing groove, the left side of the fixing rod being provided with a second fixing groove, the interior of the second lower mold being provided with a positioning groove, the vertical cross-section of the positioning groove being "T"-shaped, the interior of the second lower mold being provided with a movable groove, the transverse cross-section of the movable groove being approximately "F"-shaped, and the interior of the movable groove being provided with a positioning and fixing device.

[0007] Preferably, the positioning and fixing device includes a power rod, the surface of the power rod is slidably connected to the inside of the moving groove, the rear side of the moving groove is fixedly connected with a first positioning rod, the first positioning rod is horizontally "L"-shaped, the surface of the first positioning rod is slidably connected to the inside of the second fixing groove, the top and bottom of the power rod are both provided with sliding grooves, the vertical cross-section of the sliding groove is a right trapezoid, a first rotating rod is rotatably connected to the inside of the power rod, the right end of the first rotating rod is fixedly connected with a second rotating rod, a rotating plate is rotatably connected to the inside of the vertical groove of the positioning groove, the rotating plate is also "L"-shaped, the top of the rotating plate is fixedly connected with a first tension spring, and the first tension spring is located behind the rotation point of the rotating plate.

[0008] Preferably, the number of the fixing rods is two, the two fixing rods are symmetrically arranged on the left and right sides of the front side of the first lower mold, and the same structure is provided on the two fixing rods.

[0009] Preferably, the inside of the positioning groove is slidably connected to the fixing rod, and the second lower mold is slidably connected to the surface of the fixing rod through the positioning groove.

[0010] Preferably, the inside of the moving groove is communicated with the inside of the positioning groove.

[0011] Preferably, the top of the second rotating rod is slidably connected to the inside of the moving groove.

[0012] Preferably, the number of the rotating plates is two, the two rotating plates are symmetrically arranged on the upper and lower sides of the inner wall of the vertical groove of the positioning groove, a first tension spring is fixedly connected between the two rotating plates, and the top of the rotating plate is slidably connected to the inside of the sliding groove.

[0013] A processing method for a special-shaped counterweight is produced according to the following steps:

[0014] The first step: Heat the cylindrical bar to a temperature of 288 - 351 °C with an oxyacetylene flame.

[0015] The second step: Put the heated bar into the inside of the first forming groove, use a vise to overlap the top of the upper mold and the second lower mold, apply pressure with the vise until there is no gap between the upper mold and the second lower mold, and keep the pressure for 5 min - 10 min to obtain a curved special-shaped counterweight.

[0016] The third step: Rotate the first rotating rod forward, the second rotating rod follows the first rotating rod to rotate forward, the second tension spring resets to make the block slide out of the inside of the second fixing groove, make the power rod move to the left, and the rotating plate slides into the inside of the sliding groove.

[0017] Step 4: The first tension spring resets to slide the vertical plates of the two rotating plates out of the inside of the first fixing groove. At the same time, the power rod moves forward, causing the first positioning rod to move forward and slide out of the inside of the second fixing groove, thereby realizing the release of the fixation of the fixing rod, causing the second forming groove to move backward, and the counterweight to slide out of the inside of the first forming groove and fall on the two fixing rods.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a mold for a special-shaped counterweight and a processing method using the same, having the following beneficial effects:

[0020] 1. For the mold for the special-shaped counterweight and the processing method using the same, by moving the first lower mold forward, the fixing rod moves forward inside the positioning groove. When the power rod moves to the right, the rotating plate slides out of the inside of the chute through the inclined surface of the chute, so that the top of the rotating plate contacts the bottom of the power rod. Through the power rod, the top of the transverse plate of the rotating plate is flush with the lower surface inside the transverse groove of the positioning groove, and the vertical plate of the rotating plate slides into the inside of the first fixing groove to realize the fixation of the fixing rod, making it more convenient for workers to use the mold to process the counterweight. At the same time, the fixation of the mold is more firm, so that the mold will not loosen when processing the counterweight, thereby reducing the situation where the processing quality of the counterweight decreases due to the loosening of the mold to a certain extent.

[0021] 2. For the mold for the special-shaped counterweight and the processing method using the same, when the power rod moves to the right, the first positioning rod slides into the inside of the second fixing groove to realize the fixation of the fixing rod. At the same time, when the power rod moves to the rightmost side, the first rotating rod is rotated backward, causing the second rotating rod to rotate backward. At the same time, through the inclined surface of the clamping block, the second rotating rod pushes the clamping block to move leftward, and the second tension spring is stretched and slides into the inside of the second fixing groove. Through the cooperation of the clamping block and the first positioning rod, the secondary fixation of the fixing rod is realized, making the fixation of the mold more stable and firm, and making it safer for workers to use the mold.

[0022] 3. For the mold for the special-shaped counterweight and the processing method using the same, by rotating the first rotating rod forward, the second rotating rod follows the first rotating rod to rotate forward. The second tension spring resets to slide the clamping block out of the inside of the second fixing groove, causing the power rod to move leftward, the rotating plate to slide into the inside of the chute, and the first tension spring to reset to slide the vertical plates of the two rotating plates out of the inside of the first fixing groove. At the same time, the power rod moves forward, causing the first positioning rod to move forward and slide out of the inside of the second fixing groove, thereby realizing the release of the fixation of the fixing rod, causing the second forming groove to move backward, and the counterweight to slide out of the inside of the first forming groove and fall on the two fixing rods, making it more convenient to take out the formed counterweight. At the same time, the counterweight can dissipate heat faster, making it more convenient for workers to use the mold to process the counterweight.

[0023] 4. The mold for the special-shaped counterweight and its processing method. There are two rotating plates, and the two rotating plates are symmetrically arranged on the upper and lower sides of the inner wall of the vertical groove of the positioning groove. Due to the trapezoidal inclined surface of the sliding groove, the rotating plates can slide left and right inside the sliding groove, so that the two rotating plates can rotate relative to each other through the sliding groove, making it more convenient for the two rotating plates to position and fix the fixing rod.

[0024] 5. The mold for the special-shaped counterweight and its processing method. A clamping block is slidably connected inside the sliding groove, and an inclined surface is provided on the front side of the clamping block. Due to the inclined surface of the clamping block, the second rotating rod can push the clamping block to move leftward, enabling the rotating rod to more smoothly push the clamping block to move. To a certain extent, it reduces the situation of jamming when the rotating rod pushes the clamping block to move, making it more convenient for workers to use the mold and making the fixing of the mold smoother.

[0025] 6. The mold for the special-shaped counterweight and its processing method. The vertical cross-section of the positioning groove is "T"-shaped, and the inside of the positioning groove is slidably connected with the fixing rod. There are two rotating plates rotatably connected inside the vertical groove of the positioning groove, and the two rotating plates are symmetrically arranged on the upper and lower sides of the inner wall of the vertical groove of the positioning groove. When the fixing rod slides inside the horizontal part of the positioning groove, the influence on the two rotating plates is minimized, making the movement of the fixing rod and the rotating plates independent of each other, and enabling the rotating plates to more smoothly fix the position of the fixing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic structural diagram of a mold for a special-shaped counterweight of the present invention;

[0027] Figure 2 Schematic structural diagram of the first lower mold of the present invention;

[0028] Figure 3 Schematic cross-sectional view of the second lower mold of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged structural diagram of A in;

[0030] Figure 5 Schematic structural diagram of the rotating plate of the present invention;

[0031] Figure 6 Schematic plan view structural diagram of the second lower mold of the present invention.

[0032] In the figure: 1 first lower mold, 2 second lower mold, 3 first forming groove, 4 second forming groove, 5 upper mold, 6 first fixing groove, 7 second fixing groove, 8 fixing rod, 9 first rotating rod, 10 power rod, 11 positioning groove, 12 first positioning rod, 13 rotating plate, 14 first tension spring, 15 sliding groove, 16 second rotating rod, 17 clamping block, 18 moving groove, 19 sliding slot, 20 second tension spring. Detailed implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 - 6 , the present invention provides a technical solution: a mold for a special-shaped counterweight and a processing method using the same, including a first lower mold 1, the top of the first lower mold 1 is rotatably connected to an upper mold 5, the upper mold 5 is rotatably connected to the top of the first lower mold 1 through a shaft, the upper mold 5 can rotate on the top of the first lower mold 1, a second forming groove 4 is opened at the bottom of the upper mold 5, the vertical section of the second forming groove 4 is semicircular, a second lower mold 2 is arranged on the front side of the first lower mold 1, and first forming grooves 3 are opened at the tops of the first lower mold 1 and the second lower mold 2. The counterweight can be formed through the cooperation of the first forming groove 3 and the second forming groove 4. A fixing rod 8 is fixedly connected to the front side of the first lower mold 1. The number of the fixing rods 8 is two, and the two fixing rods 8 are symmetrically arranged on the left and right sides of the front side of the first lower mold 1. The same structure is arranged on the two fixing rods 8. First fixing grooves 6 are opened at the tops of the fixing rods 8. The number of the first fixing grooves 6 is two, and the two first fixing grooves 6 are symmetrically arranged at the top and bottom of the fixing rods 8. A second fixing groove 7 is opened on the left side of the fixing rod 8. A positioning groove 11 is opened inside the second lower mold 2. The vertical section of the positioning groove 11 is "T"-shaped. The inside of the positioning groove 11 is slidably connected to the fixing rod 8. The second lower mold 2 is slidably connected to the surface of the fixing rod 8 through the positioning groove 11. The fixing rod 8 can slide back and forth on the surface of the fixing rod 8 through the positioning groove 11. A moving groove 18 is opened inside the second lower mold 2. The transverse section of the moving groove 18 is approximately "F"-shaped. The inside of the moving groove 18 is communicated with the inside of the positioning groove 11. A positioning and fixing device is arranged inside the moving groove 18;

[0035] The positioning and fixing device includes a power rod 10, the surface of the power rod 10 is slidably connected to the inside of the moving groove 18, the power rod 10 can slide left and right inside the moving groove 18, the rear side of the moving groove 18 is fixedly connected to the first positioning rod 12, the first positioning rod 12 is a horizontal "L" shape, the power rod 10 moves to drive the first positioning rod 12 to move, the surface of the first positioning rod 12 is slidably connected to the inside of the second fixed groove 7, the first positioning rod 12 can slide back and forth inside the second fixed groove 7, the top and bottom of the power rod 10 are provided with a slide groove 15, the vertical section of the slide groove 15 is a right-angled trapezoid, the internal rotation of the power rod 10 is connected to the first rotating rod 9, the first rotating rod 9 can be inside the power rod 10 Rotation, the right end of the first rotating rod 9 is fixedly connected to the second rotating rod 16, the second rotating rod 16 can rotate along with the first rotating rod 9, the top of the second rotating rod 16 is slidably connected to the inside of the moving groove 18, the second rotating rod 16 can move inside the moving groove 18, the interior of the vertical groove of the positioning groove 11 is rotatably connected with a rotating plate 13, the rotating plate 13 is also "L"-shaped, the number of the rotating plates 13 is two, the two rotating plates 13 are symmetrically arranged on the upper and lower sides of the inner wall of the vertical groove of the positioning groove 11, a first tension spring 14 is fixedly connected between the two rotating plates 13, the top of the rotating plate 13 is slidably connected to the inside of the slide groove 15, and the trapezoidal inclined surface of the slide groove 15 allows the rotating plate 13 to slide left and right inside the slide groove 15;

[0036] The first lower mold 1 is moved forward, and then the fixing rod 8 is moved forward inside the positioning groove 11. When the power rod 10 is moved to the right, the rotating plate 13 slides out of the inside of the slide groove 15 through the inclined surface of the slide groove 15, so that the top of the rotating plate 13 contacts the bottom of the power rod 10. Through the power rod 10, the top of the horizontal plate of the rotating plate 13 is flush with the lower surface of the horizontal groove inside the positioning groove 11, and the vertical plate of the rotating plate 13 slides into the inside of the first fixing groove 6 to fix the fixing rod 8, so that workers can use the mold to process the counterweight block more conveniently, and at the same time make the mold more firmly fixed, so that the mold will not loosen when processing the counterweight block, thereby reducing the situation where the processing quality of the counterweight block due to loosening of the mold occurs to a certain extent;

[0037] A sliding groove 19 is provided on the inner wall of the longitudinal groove on the right side of the movable groove 18. The interior of the sliding groove 19 communicates with the interior of the positioning groove 11. A clamping block 17 is slidably connected to the interior of the sliding groove 19. The front side of the clamping block 17 is provided with an inclined surface. The clamping block 17 can slide left and right inside the sliding groove 19. A second tension spring 20 is fixedly connected to the inner wall of the sliding groove 19. The left end of the second tension spring 20 is fixedly connected to the surface of the clamping block 17. The second tension spring 20 can be stretched and compressed by the left and right movement of the clamping block 17.

[0038] The power rod 10 moves to the right, causing the first positioning rod 12 to slide into the interior of the second fixed slot 7, thereby achieving the fixation of the fixed rod 8. At the same time, when the power rod 10 moves to the rightmost position, the first rotating rod 9 is rotated backward, causing the second rotating rod 16 to rotate backward. Meanwhile, through the inclined surface of the clamping block 17, the second rotating rod 16 pushes the clamping block 17 to move leftward, stretching the second tension spring 20, and it slides into the interior of the second fixed slot 7. Through the cooperation of the clamping block 17 and the first positioning rod 12, the secondary fixation of the fixed rod 8 is achieved, thereby making the fixation of the mold more stable and firm, enabling workers to use the mold more safely. When the counterweight is formed, the first rotating rod 9 is rotated forward, the second rotating rod 16 follows the first rotating rod 9 to rotate forward, the second tension spring 20 is reset to make the clamping block 17 slide out of the interior of the second fixed slot 7, causing the power rod 10 to move leftward, the rotating plate 13 slides into the interior of the sliding slot 15, and the first tension spring 14 is reset to make the vertical plates of the two rotating plates 13 slide out of the interior of the first fixed slot 6. At the same time, the power rod 10 moves forward, causing the first positioning rod 12 to move forward and slide out of the interior of the second fixed slot 7, thereby achieving the release of the fixation of the fixed rod 8, causing the second forming slot 4 to move backward, and the counterweight slides out of the interior of the first forming slot 3 and lands on the two fixed rods 8, thereby making it more convenient to take out the formed counterweight. At the same time, the counterweight can dissipate heat faster, enabling workers to more conveniently use the mold to process the counterweight.

[0039] A method for machining a special-shaped counterweight mold, for machining a counterweight, using the above-mentioned special combined tool for milling machining, the steps are as follows:

[0040] The first step: Heat the cylindrical bar to a temperature of 288 - 350 °C with an oxyacetylene flame.

[0041] The second step: Place the heated bar into the interior of the first forming slot 3, use a vise to overlap the top of the upper mold 5 and the second lower mold 2, and apply pressure with the vise until there is no gap between the upper mold 5 and the second lower mold 2, and hold the pressure for 5 min - 10 min to obtain a curved special-shaped counterweight.

[0042] The third step: Rotate the first rotating rod 9 forward, the second rotating rod 16 follows the first rotating rod 9 to rotate forward, the second tension spring 20 is reset to make the clamping block 17 slide out of the interior of the second fixed slot 7, causing the power rod 10 to move leftward, the rotating plate 13 slides into the interior of the sliding slot 15, and the first tension spring 14 is reset to make the vertical plates of the two rotating plates 13 slide out of the interior of the first fixed slot 6. At the same time, the power rod 10 moves forward, causing the first positioning rod 12 to move forward and slide out of the interior of the second fixed slot 7, thereby achieving the release of the fixation of the fixed rod 8, causing the second forming slot 4 to move backward, and the counterweight slides out of the interior of the first forming slot 3 and lands on the two fixed rods 8, thereby making it more convenient to take out the formed counterweight.

[0043] Working principle: When the mold of this special-shaped counterweight is in use:

[0044] First step: Move the first lower mold 1 forward, so that the fixing rod 8 moves forward inside the positioning groove 11. When the power rod 10 moves to the right, the rotating plate 13 slides out of the inside of the chute 15 through the inclined plane of the chute 15, so that the top of the rotating plate 13 contacts the bottom of the power rod 10. Through the power rod 10, the top of the transverse plate of the rotating plate 13 is flush with the lower surface of the transverse groove of the positioning groove 11, and the vertical plate of the rotating plate 13 slides into the inside of the first fixing groove 6 to realize the fixation of the fixing rod 8;

[0045] Second step: The power rod 10 moves to the right, making the first positioning rod 12 slide into the inside of the second fixing groove 7, thereby realizing the fixation of the fixing rod 8. At the same time, when the power rod 10 moves to the rightmost side, rotate the first rotating rod 9 backward, making the second rotating rod 16 rotate backward. At the same time, through the inclined surface of the clamping block 17, the second rotating rod 16 pushes the clamping block 17 to move leftward, and the second tension spring 20 is stretched and slides into the inside of the second fixing groove 7. Through the cooperation of the clamping block 17 and the first positioning rod 12, the secondary fixation of the fixing rod 8 is realized;

[0046] Third step: Place the heated bar into the inside of the first forming groove 3, use a vise to overlap the upper mold 5 with the top of the second lower mold 2, and apply pressure with the vise until there is no gap between the upper mold 5 and the second lower mold 2, and keep the pressure for 5 min to 10 min to obtain a curved special-shaped counterweight;

[0047] Fourth step: Rotate the first rotating rod 9 forward, the second rotating rod 16 follows the first rotating rod 9 to rotate forward, the second tension spring 20 resets to make the clamping block 17 slide out of the inside of the second fixing groove 7, make the power rod 10 move leftward, the rotating plate 13 slides into the inside of the chute 15, the first tension spring 14 resets to make the vertical plates of the two rotating plates 13 slide out of the inside of the first fixing groove 6. At the same time, the power rod 10 moves forward, making the first positioning rod 12 move forward and slide out of the inside of the second fixing groove 7, thereby realizing the release of the fixation of the fixing rod 8, making the second forming groove 4 move backward, and the counterweight slides out of the inside of the first forming groove 3 and lands on the two fixing rods 8, making it more convenient to take out the formed counterweight.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold for a special-shaped counterweight, comprising a first lower mold (1), the top of which is rotatably connected to an upper mold (5), characterized in that: The bottom of the upper mold (5) is provided with a second molding groove (4), the vertical cross section of the second molding groove (4) is semicircular, the front side of the first lower mold (1) is provided with a second lower mold (2), the tops of the first lower mold (1) and the second lower mold (2) are both provided with a first molding groove (3), the front side of the first lower mold (1) is fixedly connected with a fixing rod (8), the top of the fixing rod (8) is provided with a first fixing groove (6), the left side of the fixing rod (8) is provided with a second fixing groove (7), the interior of the second lower mold (2) is provided with a positioning groove (11), the vertical cross section of the positioning groove (11) is "T"-shaped, the interior of the second lower mold (2) is provided with a moving groove (18), the transverse cross section of the moving groove (18) is approximately "F"-shaped, and the interior of the moving groove (18) is provided with a positioning and fixing device; The positioning and fixing device includes a power rod (10), the surface of the power rod (10) is slidably connected to the inside of the moving groove (18), the rear side of the moving groove (18) is fixedly connected to a first positioning rod (12), the first positioning rod (12) is horizontally "L"-shaped, the surface of the first positioning rod (12) is slidably connected to the inside of the second fixed groove (7), the top and bottom of the power rod (10) are both provided with a slide groove (15), the vertical cross-section of the slide groove (15) is a right-angled trapezoid, the inside of the power rod (10) is rotatably connected to a first rotating rod (9), the right end of the first rotating rod (9) is fixedly connected to a second rotating rod (16), the inside of the vertical groove of the positioning groove (11) is rotatably connected to a rotating plate (13), the rotating plate (13) is also "L"-shaped, the top of the rotating plate (13) is fixedly connected to a first tension spring (14), and the first tension spring (14) is located at the rear side of the rotating point of the rotating plate (13); The top of the second rotating rod (16) is slidably connected to the inside of the movable groove (18); There are two rotating plates (13), which are symmetrically arranged on the upper and lower sides of the inner wall of the vertical groove of the positioning groove (11). A first tension spring (14) is fixedly connected between the two rotating plates (13), and the top of the rotating plate (13) is slidably connected to the inside of the sliding groove (15).

2. The mold for a special-shaped counterweight according to claim 1, characterized in that: There are two fixing rods (8), which are symmetrically arranged on the left and right sides of the front side of the first lower mold (1), and the same structure is arranged on the two fixing rods (8).

3. The mold for a special-shaped counterweight according to claim 1, characterized in that: The interior of the positioning groove (11) is slidably connected to the fixing rod (8), and the second lower mold (2) is slidably connected to the surface of the fixing rod (8) through the positioning groove (11).

4. The mold for a special-shaped counterweight according to claim 1, characterized in that: The interior of the movable groove (18) is communicated with the interior of the positioning groove (11).

5. The method for processing a mold for a special-shaped counterweight according to claim 1, characterized in that: Produce in the following steps: Step 1: Heat the cylindrical rod with an oxyacetylene flame to a temperature of 288-351°C; Step 2: Place the heated rod into the first forming groove (3), use a vise to overlap the top of the upper mold (5) and the second lower mold (2), and use the vise to apply pressure until there is no gap between the upper mold (5) and the second lower mold (2), and maintain the pressure for 5 minutes to 10 minutes to obtain a curved special-shaped counterweight block; Step 3: The first rotating rod (9) rotates forward, and the second rotating rod (16) rotates forward following the first rotating rod (9). The second tension spring (20) resets to make the block (17) slide out of the second fixed groove (7), so that the power rod (10) moves to the left, and the rotating plate (13) slides into the sliding groove (15). Step 4: The first tension spring (14) is reset to make the vertical plates of the two rotating plates (13) slide out of the first fixed groove (6). At the same time, the power rod (10) moves forward, making the first positioning rod (12) move forward and slide out of the second fixed groove (7), thereby releasing the fixation of the fixed rod (8), making the second forming groove (4) move backward, and the counterweight block slides out from the inside of the first forming groove (3) and falls on the two fixed rods (8).

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