Reducing die

Abstract

The utility model discloses a reducing die which comprises a fixed panel and an air cylinder, the bottom of the fixed panel is connected with a base plate through a plurality of supporting columns, the air cylinder is connected to the center of the bottom of the fixed panel, a piston rod of the air cylinder is connected with a die closing upper shell, the surface of the die closing upper shell is connected with a movable plate, and a plurality of guide rods penetrate through the surface of the movable plate in a sliding mode. The top of the guide rod is connected with the base plate, the bottom of the guide rod is connected with the bottom plate, a plurality of limiting blocks are arranged on the surface of the bottom plate, a plurality of reducing petals are slidably connected between every two adjacent limiting blocks, and the bottom of the upper mold closing shell makes contact with the tops of the reducing petals when the upper mold closing shell moves, so that the upper mold closing shell continuously moves on the surfaces of the reducing petals; and the bottoms of the reducing petals rotate on the surface of the sliding block and are continuously folded inwards to perform extrusion reducing forming on a workpiece, and accurate mold opening and closing control can be realized to a certain extent through the air cylinder, so that the mold opening and closing speed and the production efficiency of the reducing mold are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of diameter reduction molds, and particularly relates to a diameter reduction mold. Background Art

[0002] As an important component of the automobile suspension system and other key parts, automotive rubber shock-absorbing bushings play a key role in reducing vibration and noise transmission and improving vehicle driving stability. In the production process of automotive rubber shock-absorbing bushings, a reducing die is required for reducing the diameter. The reducing die applies radial pressure to the workpiece, causing the workpiece material to undergo plastic deformation, thereby reducing its diameter.

[0003] Currently, when the reducing die is reducing the diameter of the bushing, the hydraulic press drives the die head of the reducing die to move toward the bushing, and applies an inward squeezing force to the bushing through the reducing petals during continuous movement, thereby reducing the diameter of the bushing. However, when the hydraulic press drives the reducing die to open and close, due to the high viscosity of the hydraulic oil, the hydraulic oil will generate greater resistance when flowing in the pipeline and the hydraulic cylinder, resulting in a relatively slow movement speed when the hydraulic press drives the reducing die to open and close, resulting in a low mold opening and closing speed, which prolongs the mold opening and closing time, thereby greatly reducing production efficiency. Utility Model Content

[0004] The purpose of the present invention is to provide a diameter reducing die to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a diameter reduction die, comprising:

[0006] A fixed panel, wherein the bottom of the fixed panel is connected to a base plate via a plurality of support columns;

[0007] A cylinder is connected to the bottom center of the fixed panel and the piston rod of the cylinder is connected to the mold upper shell, the surface of the mold upper shell is connected to a movable plate, and a plurality of guide rods for guiding and fixing the moving direction of the movable plate are slid through the surface of the movable plate. The top of the guide rod is connected to the base plate, and the bottom is connected to the bottom plate. A plurality of limit blocks are provided on the surface of the bottom plate, and a plurality of reducing petals for reducing the diameter of the workpiece are slidably connected between two sets of adjacent limit blocks.

[0008] Preferably, a sliding groove is provided between two adjacent groups of limiting blocks, a slider is slidably connected in the sliding groove, and the bottom of the reduced diameter flap is rotatably connected to the surface of the slider.

[0009] Preferably, a limiting plate is provided in the slide groove, and one end of the slider is connected to a slide rod.

[0010] Preferably, the other end of the sliding rod slides through the limiting plate and a first spring is sleeved on the surface of the sliding rod, and both ends of the first spring are respectively connected to the sliding block and the limiting plate.

[0011] Preferably, a second spring is sleeved on the surface of the guide rod and two ends of the second spring are respectively connected to the movable plate and the bottom plate.

[0012] Preferably, a clamping head is provided at the bottom of the base plate.

[0013] Compared with the prior art, the beneficial effect of the present invention is as follows: by connecting the fixed panel with the external cylinder piston rod, the external cylinder piston rod drives the fixed panel to move downward and contact the workpiece, so that one end of the workpiece is inserted into the mold clamping head and extends between the plurality of reduced diameter petals, and then the cylinder is started to work, and the cylinder piston rod pushes the mold clamping upper shell to move downward. When the mold clamping upper shell moves, the bottom contacts the tops of the plurality of reduced diameter petals, so that the mold clamping upper shell continues to move on the surface of the reduced diameter petals, and the bottom of the reduced diameter petals rotates on the surface of the slider and keeps The workpiece is continuously retracted inward to extrude and compress the workpiece, and while the bottom of the reducing flap rotates and retracts inward, it pulls the slider through the slide rod to slide toward the center of the bottom plate in the slide groove and stretches the first spring. After the workpiece is reduced in diameter, the cylinder can be started to drive the mold upper shell to move upward and reset, and then the elastic force of the first spring is used to pull the slider to slide and reset in the slide groove, so that the reducing flap returns to its initial state. The cylinder can achieve more precise opening and closing control of the mold to a certain extent, thereby greatly improving the opening and closing speed of the reducing mold and the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a front view of the utility model;

[0016] Figure 3 For this utility model Figure 1 The cross-sectional view at AA in the figure;

[0017] Figure 4 It is a cross-sectional bottom view of the present utility model.

[0018] In the figure: 1. Fixed panel; 2. Support column; 3. Base plate; 4. Cylinder; 5. Upper shell of mold clamping; 6. Guide rod; 7. Bottom plate; 8. Limit block; 9. Reduction flap; 10. Slide groove; 11. Slider; 12. Limit plate; 13. Slide rod; 14. First spring; 15. Second spring; 16. Mold clamping head; 17. Moving plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The utility model provides Figure 1-4 A reducing die is shown, comprising:

[0021] A fixed panel 1, wherein the bottom of the fixed panel 1 is connected to a base plate 3 via a plurality of support columns 2, and both ends of the support columns 2 are fixed to the base plate 3 and the fixed panel 1 respectively by bolts;

[0022] Cylinder 4, the cylinder 4 is connected to the bottom center of the fixed panel 1 and the piston rod of the cylinder 4 is connected to the mold upper shell 5, the surface of the mold upper shell 5 is connected to the movable plate 17, the surface of the movable plate 17 is slidably penetrated by a number of guide rods 6 for guiding and fixing the moving direction of the movable plate 17, the top of the guide rod 6 is connected to the base plate 3, and the bottom is connected to the bottom plate 7, the surface of the bottom plate 7 is provided with a number of limit blocks 8 and a number of reducing petals 9 for reducing the diameter of the workpiece are slidably connected between two groups of adjacent limit blocks 8.

[0023] A sliding groove 10 is provided between two adjacent groups of limiting blocks 8 , in which a slider 11 is slidably connected, and the bottom of the diameter-reducing flap 9 is rotatably connected to the surface of the slider 11 .

[0024] A limit plate 12 is provided in the slide groove 10, one end of the slider 11 is connected to a slide rod 13, the other end of the slide rod 13 slides through the limit plate 12 and a first spring 14 is mounted on the surface of the slide rod 13, the two ends of the first spring 14 are respectively connected to the slider 11 and the limit plate 12, when the slider 11 slides in the slide groove 10, the moving direction of the slider 11 can be guided by the slide rod 13, thereby enhancing the stability of the movement of the slider 11.

[0025] The surface of the guide rod 6 is sheathed with a second spring 15 , and both ends of the second spring 15 are connected to the moving plate 17 and the bottom plate 7 respectively.

[0026] A clamping head 16 is provided at the bottom of the base plate 7 .

[0027] The reducing mold is constructed by connecting a fixed panel 1 with an external cylinder piston rod, and the external cylinder piston rod drives the fixed panel 1 to move downward and contact the workpiece, so that one end of the workpiece is inserted into the clamping head 16 and extends between the plurality of reducing petals 9. Then, the cylinder 4 is started to work, and the piston rod of the cylinder 4 pushes the clamping upper shell 5 to move downward. When the clamping upper shell 5 moves, it drives the movable plate 17 to slide on the surface of the guide rod 6 and compresses the second spring 15, so that the guide rod 6 can guide the direction of the clamping upper shell 5 when it moves, thereby enhancing the stability of the clamping upper shell 5 when it moves.

[0028] When the mold upper shell 5 moves, the bottom contacts the tops of several diameter-reducing petals 9, so that the mold upper shell 5 continues to move on the surface of the diameter-reducing petals 9, and the bottom of the diameter-reducing petals 9 rotates on the surface of the slider 11 and continuously retracts inward to extrude and compress the workpiece. When the bottom of the diameter-reducing petals 9 rotates and retracts inward, it pulls the slider 11 to slide in the slide groove 10 toward the center of the bottom plate 7 through the slide rod 13 and stretches the first spring 14. After the workpiece is reduced in diameter, the cylinder 4 can be started to drive the mold upper shell 5 to move upward and reset, and then the first spring 14 can be used to press the workpiece. 4's elastic force pulls the slider 11 to slide in the slide groove 10 and reset, thereby returning the diameter reduction flap 9 to its initial state, and the cylinder 4 can achieve relatively precise mold opening and closing control to a certain extent, thereby improving the precision and efficiency of diameter reduction molding, thereby greatly improving the mold opening and closing speed and production efficiency of the diameter reduction mold, and the diameter reduction mold is controlled by the cylinder 4 to close the mold up and down, making the operation simpler, the service life long, and not affected by the ambient temperature. The limit style of the mold closing by moving the mechanism up and down can ensure the stability and consistency of the part diameter reduction quality.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A diameter reduction die, characterized in that: include: A fixed panel (1), wherein the bottom of the fixed panel (1) is connected to a base plate (3) via a plurality of support columns (2); A cylinder (4) is connected to the bottom center of the fixed panel (1) and the piston rod of the cylinder (4) is connected to the mold upper shell (5), the surface of the mold upper shell (5) is connected to a movable plate (17), the surface of the movable plate (17) is slidably penetrated by a plurality of guide rods (6) for guiding and fixing the moving direction of the movable plate (17), the top of the guide rod (6) is connected to the base plate (3), and the bottom is connected to the bottom plate (7), the surface of the bottom plate (7) is provided with a plurality of limit blocks (8), and a plurality of reduction flaps (9) for reducing the diameter of the workpiece are slidably connected between two groups of adjacent limit blocks (8).

2. A diameter reduction die according to claim 1, characterized in that: A sliding groove (10) is provided between two groups of adjacent limiting blocks (8), a slider (11) is slidably connected in the sliding groove (10), and the bottom of the diameter-reducing flap (9) is rotatably connected to the surface of the slider (11).

3. A diameter reduction die according to claim 2, characterized in that: A limiting plate (12) is provided in the sliding groove (10), and one end of the sliding block (11) is connected to a sliding rod (13).

4. The diameter reducing die according to claim 3, characterized in that: The other end of the slide rod (13) slides through the limiting plate (12) and a first spring (14) is sleeved on the surface of the slide rod (13). The two ends of the first spring (14) are respectively connected to the slider (11) and the limiting plate (12).

5. The diameter reducing die according to claim 1, characterized in that: A second spring (15) is sleeved on the surface of the guide rod (6), and two ends of the second spring (15) are respectively connected to the moving plate (17) and the bottom plate (7).

6. The diameter reducing die according to claim 1, characterized in that: A clamping head (16) is provided at the bottom of the base plate (7).

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