A punch die cushion capable of high efficiency buffering

Abstract

The utility model discloses a punch press die pad of high -efficient buffering, including frame and buffer cylinder, buffer cylinder is fixed at the lower extreme of frame, and the inside of frame is fixed with adjusting screw rod through stroke adjusting mechanism, and the lower extreme of adjusting screw rod is located in buffer cylinder, and the lower extreme of adjusting screw rod is opened with buffer chamber, and the both sides of buffer chamber are connected with inflow channel and outflow channel respectively, and the inflow channel is fixed with check valve, and the outflow channel is provided with flow regulating device, and the inside movable joint of adjusting screw rod has the main shaft, and the upper end of main shaft is fixed with workstation, and the lower extreme of main shaft is located in buffer cylinder and is fixed with buffer nut, and the diameter of buffer nut is equal to the inside diameter of buffer chamber, the advantage is can adjust the flow rate and back pressure of oil according to the difference of stamping process, avoids the heat accumulation and will lead to the oil temperature rise, influences the buffering effect, thereby ensures the stable buffering performance.

Description

Technical Field

[0001] This utility model relates to the field of punch press die pad technology, and in particular to a punch press die pad that can provide efficient cushioning. Background Technology

[0002] In modern industrial production, punch presses are widely used metal processing equipment, mainly used for stamping and forming of metal sheets. The punch press die pad, as one of the key functional components of the punch press, directly affects the working efficiency, processing accuracy, equipment lifespan, and operational stability of the punch press. Traditional buffering structures mostly utilize a large piston and the rear end cover for short-distance buffering, which results in a relatively short distance and poor buffering effect.

[0003] Chinese utility model patent CN211039230U discloses a hydraulic damper, including a cylinder, a piston rod, and a large piston. One end of the cylinder is fixedly connected to an end cap, and the other end of the cylinder is equipped with a large piston. An oil reservoir is located between the large piston and the end cap, and the oil reservoir is filled with hydraulic oil. A piston rod is fixedly connected to one side of the large piston, and the piston rod extends outside the cylinder. A cylindrical cavity is formed on the side of the large piston away from the piston rod. A small piston is fixedly mounted on the end cap, and the outer diameter of the small piston is the same as the inner diameter of the cylindrical cavity. A check valve is provided on the side of the small piston near the large piston. Although this design improves the buffering effect, its buffering process relies on the oil discharge of a fixed gap. Under high-speed conditions, heat is easily generated due to oil friction and compression. If the heat accumulates, it will cause the oil temperature to rise and the viscosity to change, thus making the buffering performance unstable or even failing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a punching die pad that can efficiently buffer the oil flow rate and back pressure according to different stamping processes, so as to avoid heat accumulation and oil temperature rise, which would affect the buffering effect and thus ensure stable buffering performance.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a punch press die pad with high efficiency buffering, including a frame and a buffer cylinder. The buffer cylinder is fixed at the lower end of the frame. An adjusting screw is fixed inside the frame through a stroke adjusting mechanism. The lower end of the adjusting screw is located inside the buffer cylinder. A buffer cavity is opened on the lower end of the adjusting screw. An inflow channel and an outflow channel are respectively connected to both sides of the buffer cavity. A check valve is fixed on the inflow channel. A flow regulating device is provided on the outflow channel. A main shaft is movably connected inside the adjusting screw. A worktable is fixed at the upper end of the main shaft. The lower end of the main shaft is located inside the buffer cylinder and a buffer nut is fixed thereon. The diameter of the buffer nut is equal to the inner diameter of the buffer cavity.

[0006] Furthermore, the stroke adjustment mechanism includes a motor, a large gear, a worm gear, and a worm shaft. The worm gear is fixed to the outer surface of the adjusting screw, and the worm shaft is rotatably connected inside the frame. One end of the worm shaft meshes with the worm gear, and the other end meshes with the large gear. The motor is fixed to the frame via a motor mount, and a small gear is fixed to the output shaft of the motor, which meshes with the large gear.

[0007] Furthermore, the flow regulating device includes a coaxially mounted overflow valve seat and an adjusting screw. The overflow valve seat is fixed to the lower end face of the adjusting screw and is perpendicular to the outflow channel. The adjusting screw adjusts the gap with the overflow valve seat by rotating it up and down.

[0008] Furthermore, the outer surface of the buffer cylinder is integrally provided with heat dissipation fins.

[0009] Furthermore, the heat sinks are evenly distributed along the outer circumference of the buffer cylinder, and the heat sinks are V-shaped pieces that are high on both sides and low in the middle.

[0010] Furthermore, the buffer cylinder has a sealing ring at its opening, which ensures a tight fit between the adjusting screw and the buffer cylinder.

[0011] Compared with the prior art, the advantages of this utility model are that the check valve allows the oil to flow in one direction, ensuring that there is always oil in the buffer chamber during the buffering process, thus making the buffering process more stable and less impactful. At the same time, in conjunction with the flow regulating device, the gap of the outflow channel is changed, realizing precise control of the oil flow rate and back pressure, avoiding heat accumulation that could lead to an increase in oil temperature and affect the buffering effect. In addition, the V-shaped heat sink integrally formed on the outer surface of the buffer cylinder increases the heat dissipation area and accelerates the dissipation of heat. Attached Figure Description

[0012] Figure 1 This is a three-dimensional front view of the present invention; Figure 2 This is a cross-sectional view of the stroke adjustment mechanism and buffer cylinder of this utility model; Figure 3 For the present utility model in Figure 2 Enlarged view of point A in the middle. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1-3As shown, a high-efficiency cushioning punch die pad includes a frame 1 and a buffer cylinder 2. The buffer cylinder 2 is fixed to the lower end of the frame 1. An adjusting screw 4 is fixed inside the frame 1 via a stroke adjusting mechanism 3. The stroke adjusting mechanism 3 includes a motor 31, a large gear 32, a worm gear 33, and a worm 34. The worm gear 33 is fixed to the outer surface of the adjusting screw 4. The worm gear 34 is rotatably connected inside the frame 1. One end of the worm gear 34 meshes with the worm gear 33, and the other end meshes with the large gear 32. The motor 31 is fixed to the frame 1 via a motor mount 35. A small gear 36 is fixed to the output shaft of the motor 31. The small gear 36 meshes with the large gear 32. The rotation of the output shaft of the motor 31 drives the small gear 36 to rotate together. The gear reduction mechanism achieves primary speed reduction while increasing output torque. The rotation of the large gear 32 drives the worm 34 to rotate, and the rotating worm 34 meshes with the turbine 33, achieving secondary speed reduction. The worm 34 drives the turbine 33 to move up and down. The adjusting screw 4 is fixed to the turbine 33, so the adjusting screw 4 moves up and down with the turbine 33. The lower end of the adjusting screw 4 is located inside the buffer cylinder 2. The cylinder port of the buffer cylinder 2 is equipped with a sealing ring 22, which ensures a tight fit between the adjusting screw 4 and the buffer cylinder 2, preventing oil leakage from the buffer cylinder 2. A buffer chamber 41 is opened on the lower end of the adjusting screw 4. An inflow channel 42 and an outflow channel 43 are connected to the two sides of the buffer chamber 41, respectively. A check valve 44 is fixed on the inflow channel 42. The check valve 44 allows the oil to flow in one direction, ensuring that there is always oil in the buffer chamber 41 during the buffering process (buffering begins after the buffer nut 51 enters the buffer chamber 41), thus making the buffering process smoother and reducing impact. A flow regulating device is installed on the outlet channel 43, including a coaxially mounted overflow valve seat 71 and an adjusting screw 72. The overflow valve seat 71 is fixed to the lower end face of the adjusting screw 4, and is perpendicular to the outlet channel 43. The adjusting screw 72 adjusts the gap with the overflow valve seat 71 by rotating it up and down. A main shaft 5 is movably connected inside the adjusting screw 4. A worktable 6 is fixed to the upper end of the main shaft 5, and the lower end of the main shaft 5 is located inside the buffer cylinder 2 and fixed with the buffer nut 51. The diameter of the buffer nut 51 is... Regarding the inner diameter of the buffer chamber 41, when the adjusting screw 4 moves upward driven by the turbine 33, the buffer chamber 41 rises in the buffer cylinder 2, and the initial distance between the buffer chamber 41 and the buffer nut 51 fixed on the main shaft 5 increases. When the adjusting screw 4 moves downward, the initial distance between the buffer chamber 41 and the buffer nut 51 decreases. The stroke can be adjusted according to different processing conditions. In this embodiment, the flow rate and back pressure are controlled by the coordinated operation of the flow regulating device and the check valve 44. The operator can adjust the buffering force by rotating the adjusting screw 72 to change the fit clearance between it and the overflow valve seat 71. The design ensures both sufficient buffering resistance and smooth and timely discharge of oil from the buffer chamber 41.This effectively avoids the problems of frictional heating and temperature rise caused by oil stagnation and "pressure buildup" due to excessively small gaps; the outer surface of the buffer cylinder 2 is integrally provided with heat dissipation fins 21, which are evenly distributed along the outer circumference of the buffer cylinder 2. The heat dissipation fins 21 are V-shaped fins with higher sides and lower middle, which increases the heat dissipation area and flow path, enabling the heat inside the buffer cylinder 2 to be quickly dissipated.

[0015] The check valve 44 and overflow valve seat 71 used in this embodiment are commercially available products and will not be described in detail here.

[0016] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A punch press die pad with high-efficiency cushioning, comprising a frame and a buffer cylinder, wherein the buffer cylinder is fixed to the lower end of the frame, and an adjusting screw is fixed inside the frame via a stroke adjustment mechanism, the lower end of the adjusting screw being located inside the buffer cylinder, characterized in that, A buffer chamber is provided at the lower end of the adjusting screw. An inflow channel and an outflow channel are respectively connected to the two sides of the buffer chamber. A check valve is fixed on the inflow channel, and a flow regulating device is provided on the outflow channel. A main shaft is movably connected inside the adjusting screw. A worktable is fixed at the upper end of the main shaft, and the lower end of the main shaft is located inside the buffer cylinder and is fixed with a buffer nut. The diameter of the buffer nut is equal to the inner diameter of the buffer chamber.

2. The press die pad with high-efficiency cushioning as described in claim 1, characterized in that, The stroke adjustment mechanism includes a motor, a large gear, a worm gear, and a worm shaft. The worm gear is fixed to the outer surface of the adjusting screw, and the worm shaft is rotatably connected inside the frame. One end of the worm shaft meshes with the worm gear, and the other end meshes with the large gear. The motor is fixed to the frame via a motor mount, and a small gear is fixed to the output shaft of the motor, which meshes with the large gear.

3. The press die pad with high-efficiency cushioning as described in claim 1, characterized in that, The flow regulating device includes an overflow valve seat and an adjusting screw mounted coaxially. The overflow valve seat is fixed to the lower end face of the adjusting screw and is perpendicular to the outflow channel. The adjusting screw adjusts the gap with the overflow valve seat by rotating it up and down.

4. The press die pad with high-efficiency cushioning as described in claim 1, characterized in that, The outer surface of the buffer cylinder is integrally provided with heat dissipation fins.

5. A punch press die pad with high-efficiency cushioning as described in claim 4, characterized in that, The heat sinks are evenly distributed along the outer circumference of the buffer cylinder, and the heat sinks are V-shaped pieces that are high on both sides and low in the middle.

6. The press die pad with high-efficiency cushioning as described in claim 1, characterized in that, The buffer cylinder is provided with a sealing ring at its inlet, which allows the adjusting screw to fit tightly with the buffer cylinder.

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