Deflection compensation electro-hydraulic bending machine

Abstract

The invention discloses a deflection compensation electro-hydraulic bending machine which comprises a machine table, a supporting frame is installed on the top of the machine table, the top of the supporting frame is connected with an installation base through a mechanical deflection compensation mechanism, a lower bending die is installed on the top of the installation base, and a lifting plate driven by a driving mechanism to ascend and descend is movably arranged on the top of the machine table. The mechanical deflection compensation mechanism comprises a lower wave-shaped plate and an upper wave-shaped plate, the upper wave-shaped plate is installed at the bottom of the installation base, the supporting frame is movably connected with the lower wave-shaped plate, upper inclined blocks are evenly arranged at the bottom of the upper wave-shaped plate, and lower inclined blocks are arranged at the top of the lower wave-shaped plate. An oil storage groove is formed in the top of the upper wave-shaped plate, a conical hole is formed in the bottom inner wall of the oil storage groove, and an oil leakage hole is formed in the bottom of the upper inclined block. During mechanical compensation, abrasion and thermal deformation between the upper wave-shaped plate and the lower wave-shaped plate can be effectively reduced, and long-term stability of compensation is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bending machine, in particular to the deflection compensation electro-hydraulic bending machine. BACKGROUND

[0002] The electro-hydraulic bending machine is a bending machine that combines the advantages of electrical control and hydraulic power. During the workpiece bending process of the electro-hydraulic bending machine, the maximum force is applied to the two ends of the slider. The reaction force during the bending of the plate causes the lower surface of the slider to deform in a concave shape. The deformation amount of the middle part of the slider is the largest. The angles of the workpieces that are finally bent out are not uniform in the full length direction. In order to eliminate the adverse effects caused by the deformation of the slider, a set of wedge blocks with inclined surfaces is usually used to mechanically compensate the slider. Each wedge block is designed according to the deflection curve of the finite element analysis of the slider and the workbench.

[0003] CN117000831A is a deflection compensation device for a bending machine workbench. The application uses a driving motor and a driving mechanism to realize the synchronous driving of multiple lifting plates. The structure of the entire deflection compensation device is simple. However, this technical solution lacks lubrication between the upper and lower inclined blocks. During mechanical compensation, frequent friction occurs between the upper and lower inclined blocks. In the absence of lubrication, the upper and lower inclined blocks will heat up, wear out, and deform, thereby affecting the compensation effect. SUMMARY

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a deflection compensation electro-hydraulic bending machine, comprising a machine table, a support frame is installed on the top of the machine table, a mounting seat is connected to the top of the support frame through a mechanical deflection compensation mechanism, a lower bending die is installed on the top of the mounting seat, a lifting plate that is driven to lift by a driving mechanism is movably arranged on the top of the machine table, an upper bending die is installed on the bottom of the lifting plate, the mechanical deflection compensation mechanism comprises a lower wave-shaped plate and an upper wave-shaped plate that can be movably matched, the upper wave-shaped plate is installed on the bottom of the mounting seat, the lower wave-shaped plate is movably connected to the support frame, a plurality of upper inclined blocks are evenly arranged on the bottom of the upper wave-shaped plate, a plurality of lower inclined blocks that match the upper inclined blocks are evenly arranged on the top of the lower wave-shaped plate, an oil storage groove for storing lubricating oil is formed in the top of the upper wave-shaped plate, a tapered hole that is located above the upper inclined blocks is formed in the bottom inner wall of the oil storage groove, and an oil leakage hole that communicates with the tapered hole is formed in the bottom of the upper inclined block.

[0005] Preferably, the driving mechanism comprises two vertical plates and a bending hydraulic cylinder, the two vertical plates are respectively installed on the two sides of the top of the machine table, an activity plate is rotatably connected to the top of each vertical plate, a connecting rod is hingedly connected to the end of the activity plate, the bottom end of the connecting rod is hingedly connected to the lifting plate, the bending hydraulic cylinder is hingedly installed on the vertical plate, the output shaft of the bending hydraulic cylinder is hingedly connected to one end of the activity plate, and a connecting rod is installed between the two vertical plates.

[0006] Preferably, the top of the lower corrugated plate has a lower horizontal plate located between adjacent lower inclined blocks, the bottom of the upper corrugated plate has an upper horizontal plate located between adjacent upper inclined blocks, and both ends of the upper corrugated plate have extension plates.

[0007] Preferably, the extension plates at both ends of the upper corrugated plate are connected to cover plates, and the bottom of the cover plates is equipped with sealing strips that extend into the oil storage tank.

[0008] Preferably, the bottom of the sealing protrusion is connected to a mounting post, the mounting post is movably connected to a movable block that fits with the conical hole, the bottom end of the movable block is conical, and oil storage cotton that is passed through the movable block is installed in the oil storage tank.

[0009] Preferably, the top of the movable block has a movable hole into which the bottom end of the mounting column can be movably inserted; a spring sleeved on the mounting column is installed between the movable block and the bottom of the sealing protrusion; a movable rod that fits with the oil leakage hole is installed at the bottom of the movable block; the bottom end of the movable rod protrudes through the oil leakage hole and is arc-shaped; and a pressure ring that presses against the oil storage cotton is installed on the movable block.

[0010] Preferably, the extension plate is located on the bottom side of the mounting base, the oil reservoir extends to the extension plate, and the top of the cover plate has an oil filling hole that penetrates the sealing strip, and the oil filling hole is threadedly connected to a plug.

[0011] Preferably, the lower corrugated plate includes a positioning plate, the lower inclined block and the lower horizontal plate are mounted on the positioning plate, the top of the lower inclined block is provided with a first pressure groove, the top of the lower horizontal plate is provided with a second pressure groove whose bottom inner wall is flush with the bottom inner wall of the first pressure groove, and the positioning plate is connected by screws with pressure strips that pass through the first pressure groove and the second pressure groove.

[0012] Preferably, the top of the positioning plate is uniformly equipped with positioning posts, and the bottom of the lower inclined block is provided with positioning holes into which the positioning posts can be inserted.

[0013] Preferably, the top of the support frame is provided with a groove, the inner cavity of the groove is movably connected to a lower corrugated plate, and a push cylinder for driving the movement of the lower corrugated plate is installed on one side of the inner cavity of the groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. Mechanical deflection compensation is achieved through the cooperation of the upper and lower corrugated plates. During mechanical compensation, the lubricating oil in the oil reservoir can pass through the conical hole and the oil leakage hole and fall onto the upper and lower corrugated plates, which can effectively reduce the wear and thermal deformation between the upper and lower corrugated plates and ensure the long-term stability of the compensation effect.

[0016] 2. When mechanical deflection is compensated by the upper and lower corrugated plates, the pressure ring can move intermittently with the moving block and moving rod to intermittently squeeze the oil storage cotton, thereby ensuring that the lubricating oil absorbed by the oil storage cotton can drip down between the upper and lower corrugated plates to ensure the lubrication effect.

[0017] 3. The lower inclined block and lower horizontal plate of the lower corrugated plate are modularly designed, which makes it easy to replace or adjust them according to different compensation curve requirements. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention;

[0019] Figure 2 This is a structural diagram of the vertical plate;

[0020] Figure 3 This is a structural diagram of the support frame;

[0021] Figure 4 This is a structural diagram of the tank.

[0022] Figure 5 This is a structural diagram of the upper corrugated plate;

[0023] Figure 6 This is a structural diagram of an oil storage tank;

[0024] Figure 7 for Figure 6 Enlarged view of point A in the image;

[0025] Figure 8 Here is a structural diagram of the lower corrugated plate;

[0026] Figure 9 for Figure 8 Enlarged diagram of point B in the diagram;

[0027] Figure 10 This is a cross-sectional view of the upper corrugated plate.

[0028] In the diagram: 1. Machine base; 2. Drive mechanism; 21. Vertical plate; 22. Movable plate; 23. Connecting rod; 24. Linkage rod; 25. Bending hydraulic cylinder; 3. Lifting plate; 4. Upper bending die; 5. Support frame; 51. Groove; 52. Pushing cylinder; 6. Mounting base; 7. Lower bending die; 8. Lower corrugated plate; 81. Lower inclined block; 82. Lower horizontal plate; 83. First pressing groove; 84. Second pressing groove; 85. Positioning. Plate; 86. Pressure strip; 87. Positioning post; 9. Upper corrugated plate; 91. Upper inclined block; 92. Upper horizontal plate; 93. Oil reservoir; 931. Conical hole; 932. Oil leakage hole; 94. Extension plate; 95. Cover plate; 96. Sealing protrusion; 961. Mounting post; 962. Movable block; 963. Spring; 964. Pressure ring; 965. Movable rod; 966. Movable hole; 97. Oil storage cotton; 98. Oil filling hole. Detailed Implementation

[0029] Please see Figures 1-10 The deflection-compensated electro-hydraulic bending machine includes a machine base 1. A support frame 5 is installed on the top of the machine base 1. A mounting base 6 is connected to the top of the support frame 5 via a mechanical deflection compensation mechanism. A lower bending die 7 is installed on the top of the mounting base 6. A lifting plate 3, driven by a drive mechanism 2, is movably installed on the top of the machine base 1. An upper bending die 4 is installed at the bottom of the lifting plate 3. The mechanical deflection compensation mechanism includes a lower corrugated plate 8 and an upper corrugated plate 9 that can be relatively movably fitted. The upper corrugated plate 9 is installed at the bottom of the mounting base 6. The lower corrugated plate 8 is movably connected to the support frame 5. Upper inclined blocks 91 are evenly provided at the bottom of the upper corrugated plate 9. Lower inclined blocks 81 that cooperate with the upper inclined blocks 91 are evenly provided at the top of the lower corrugated plate 8. An oil storage tank 93 for storing lubricating oil is opened at the top of the upper corrugated plate 9. A conical hole 931 located above the upper inclined block 91 is opened on the bottom inner wall of the oil storage tank 93. An oil leakage hole 932 communicating with the conical hole 931 is opened at the bottom of the upper inclined block 91.

[0030] The lower inclined block 81 on the lower corrugated plate 8 and the upper inclined block 91 on the upper corrugated plate 9 are arranged in a compensation curve that matches the actual deflection along the length of the mounting base 6. When the lower corrugated plate 8 moves relative to the upper corrugated plate 9, the lower inclined block 81 on the lower corrugated plate 8 can abut against and press against the upper inclined block 91, thereby pressing against the mounting base 6 and the lower bending die 7 above the upper corrugated plate 9, producing a predetermined elastic deformation opposite to the original deflection deformation direction, so as to achieve compensation for bending deflection.

[0031] The oil reservoir 93 stores lubricating oil, which drips down along the conical hole 931 and the oil leakage hole 932, eventually falling between the upper inclined block 91 and the lower inclined block 81 to lubricate them. When the upper inclined block 91 and the lower inclined block 81 move relative to each other, they are prevented from wearing or deforming due to heat, so that the compensation mechanism can be kept in the best working condition for a long time, thereby ensuring the compensation effect during deflection compensation.

[0032] The drive mechanism 2 includes two upright plates 21 and a bending hydraulic cylinder 25. The two upright plates 21 are respectively installed on the top sides of the machine base 1. The top of each of the two upright plates 21 is rotatably connected to a movable plate 22. The end of the movable plate 22 is hinged to a connecting rod 24. The bottom end of the connecting rod 24 is hinged to a lifting plate 3. The bending hydraulic cylinder 25 is hinged to the upright plate 21. The output shaft of the bending hydraulic cylinder 25 is hinged to one end of the movable plate 22. A connecting rod 23 is installed between the two upright plates 21.

[0033] The upright plate 21, the movable plate 22, the connecting rod 24, the lifting plate 3, and the bending hydraulic cylinder 25 can form a crank-connecting rod motion. When the output shaft of the bending hydraulic cylinder 25 drives one end of the movable plate 22 to move upward, the movable plate 22 can rotate relative to the upright plate 21, and then its other end can drive the connecting rod 24 downward, so that the connecting rod 24 drives the lifting plate 3 and the upper bending die 4 to move downward, thereby cooperating with the lower bending die 7 to perform bending operations.

[0034] The top of the lower corrugated plate 8 has a lower horizontal plate 82 located between adjacent lower inclined blocks 81, the bottom of the upper corrugated plate 9 has an upper horizontal plate 92 located between adjacent upper inclined blocks 91, and the two ends of the upper corrugated plate 9 have extension plates 94.

[0035] The extension plates 94 at both ends of the upper corrugated plate 9 are connected to cover plates 95, and the bottom of the cover plates 95 is equipped with sealing protrusions 96 that extend into the oil reservoir 93.

[0036] The outer wall of the sealing strip 96 has a sealing strip, and the two ends of the cover plate 95 are connected to the extension plates 94 at both ends of the upper corrugated plate 9 by screws. When the sealing strip 96 is inserted into the oil reservoir 93, it can prevent the lubricating oil in the oil reservoir 93 from leaking between the bottom of the cover plate 95 and the top of the upper corrugated plate 9.

[0037] The bottom of the sealing strip 96 is connected to a mounting post 961, and the mounting post 961 is movably connected to a movable block 962 that is in clearance fit with the tapered hole 931. The bottom end of the movable block 962 is tapered, and an oil storage cotton 97 that is passed through the movable block 962 is installed in the oil storage tank 93.

[0038] The upper opening of the conical hole 931 is large and the lower opening is small. The movable block 962 cooperates with the conical hole 931, and there is a gap between the outer wall of the movable block 962 and the inner wall of the conical hole 931. The lubricating oil stored in the oil reservoir 93 can pass through this gap and drip slowly downward through the oil leakage hole 932, ensuring that the lubricating oil drips slowly and continuously, rather than flowing out quickly. The cooperation between the movable block 962 and the conical hole 931 can regulate the speed at which the lubricating oil drips downward.

[0039] The oil-absorbing cotton 97 can absorb and store lubricating oil. When the oil-absorbing cotton 97 is saturated with oil, the lubricating oil on the oil-absorbing cotton 97 drips down and passes through the gap between the outer wall of the movable block 962 and the inner wall of the conical hole 931.

[0040] The top of the movable block 962 is provided with a movable hole 966 into which the bottom end of the mounting post 961 is movably inserted. A spring 963 is installed between the bottom of the movable block 962 and the sealing protrusion 96 and is sleeved on the mounting post 961. A movable rod 965 is installed at the bottom of the movable block 962 and is clearance-fitted with the oil leakage hole 932. The bottom end of the movable rod 965 protrudes through the oil leakage hole 932 and is arc-shaped. A pressure ring 964 is installed on the movable block 962 and presses against the oil storage cotton 97.

[0041] There is also a gap between the outer wall of the movable rod 965 and the inner wall of the oil leakage hole 932, which allows lubricating oil to pass through.

[0042] The movable block 962 can move relative to the mounting post 961 through the movable hole 966 at its top. When the lower corrugated plate 8 moves relative to the upper corrugated plate 9, the lower inclined block 81 can abut against the arc-shaped bottom end of the movable rod 965 that passes through the oil leakage hole 932, causing the movable rod 965 to move upward along the oil leakage hole 932, thereby causing the movable block 962 and the pressure ring 964 to move upward and compress the spring 963.

[0043] After the workpiece is bent, the lower corrugated plate 8 returns to its original position. At this time, under the restoring force of the spring 963, the movable rod 965 and the movable block 962 return to their original positions. The pressure ring 964 can then press down and squeeze the oil storage cotton 97, thereby squeezing out the lubricating oil absorbed by the oil storage cotton 97. This allows a portion of the lubricating oil to pass through the gap between the outer wall of the movable block 962 and the inner wall of the tapered hole 931, the oil leakage hole 932, and finally fall between the upper inclined block 91 and the lower inclined block 81.

[0044] When the workpiece is bent, the pressure ring 964 can move intermittently and squeeze the oil storage cotton, which can ensure that the lubricating oil absorbed by the oil storage cotton can drip down between the upper inclined block 91 and the lower inclined block 81, thus ensuring the lubrication effect.

[0045] The extension plate 94 is located on the bottom side of the mounting base 6. The oil reservoir 93 extends to the extension plate 94. The top of the cover plate 95 is provided with an oil filling hole 98 that passes through the sealing protrusion 96. The oil filling hole 98 is threadedly connected to a plug.

[0046] The extension plate 94 is horizontally positioned, and the bottom of the mounting base 6 has a mounting groove extending along its length. The upper corrugated plate 9 is installed in this mounting groove, and the extension plate 94 on the upper corrugated plate 9 passes through the mounting groove. Therefore, when the cover plate 95 is connected to the extension plate 94 by screws, the end of the cover plate 95 is located outside the mounting groove.

[0047] By opening an oil filling hole 98 on the part of the cover plate 95 located outside the mounting groove, it is convenient to add and replenish the lubricating oil in the oil reservoir 93. After the lubricating oil is replenished, the plug can be threaded to the oil filling hole 98.

[0048] The lower corrugated plate 8 includes a positioning plate 85, a lower inclined block 81, and a lower horizontal plate 82 mounted on the positioning plate 85. The top of the lower inclined block 81 is provided with a first pressure groove 83, and the top of the lower horizontal plate 82 is provided with a second pressure groove 84 whose bottom inner wall is flush with the bottom inner wall of the first pressure groove 83. The positioning plate 85 is connected by screws to a pressure strip 86 that passes through the first pressure groove 83 and the second pressure groove 84.

[0049] The top two sides of the lower inclined block 81 are provided with first pressure grooves 83, the top two sides of the lower horizontal plate 82 are provided with second pressure grooves 84, and the number of pressure strips 86 is two.

[0050] By passing through the first pressure groove 83 and the second pressure groove 84, the lower inclined block 81 and the lower horizontal plate 82 are pressed onto the positioning plate 85. Then, the positioning plate 85 and the pressure strip 86 are connected by screws, which facilitates the installation and removal of the lower inclined block 81 and the lower horizontal plate 82, so that different lower inclined blocks 81 can be replaced according to the actual compensation deflection.

[0051] The upper inclined block 91 and upper horizontal plate 92 of the upper corrugated plate 9 can also be installed in the same way as described above.

[0052] Positioning pins 87 are evenly installed on the top of the positioning plate 85, and positioning holes that can be inserted into the bottom of the lower inclined block 81 are provided.

[0053] The bottom of the lower horizontal plate 82 can also have a positioning hole into which the positioning post 87 is inserted. Before the pressure strip 86 presses down on the lower inclined block 81 and the lower horizontal plate 82, the positioning hole and the positioning post 87 can facilitate the positioning of the lower inclined block 81 and the lower horizontal plate 82.

[0054] The top of the support frame 5 is provided with a groove 51, the inner cavity of the groove 51 is movably connected to the lower corrugated plate 8, and a push cylinder 52 for driving the lower corrugated plate 8 is installed on one side of the inner cavity of the groove 51.

[0055] The hydraulic cylinder 52 can drive the lower corrugated plate 8 to move horizontally relative to the upper corrugated plate 9, so as to perform mechanical compensation when the workpiece is bent and ensure consistent bending accuracy of long workpieces.

Claims

1. A deflection-compensated electro-hydraulic bending machine, comprising a machine base (1), characterized in that: A support frame (5) is installed on the top of the machine base (1). The top of the support frame (5) is connected to a mounting base (6) via a mechanical deflection compensation mechanism. A lower bending die (7) is installed on the top of the mounting base (6). A lifting plate (3) driven by a drive mechanism (2) is movably installed on the top of the machine base (1). An upper bending die (4) is installed at the bottom of the lifting plate (3). The mechanical deflection compensation mechanism includes a lower corrugated plate (8) and an upper corrugated plate (9) that can be relatively movable together. An upper corrugated plate (9) is installed at the bottom of the mounting base (6). The support frame (5) is movably connected to the lower corrugated plate (8). The bottom of the upper corrugated plate (9) is evenly provided with upper inclined blocks (91). The top of the lower corrugated plate (8) is evenly provided with lower inclined blocks (81) that cooperate with the upper inclined blocks (91). The top of the upper corrugated plate (9) is provided with an oil storage tank (93) for storing lubricating oil. The bottom inner wall of the oil storage tank (93) is provided with a conical hole (931) located above the upper inclined block (91). The bottom of the upper inclined block (91) is provided with an oil leakage hole (932) that communicates with the conical hole (931).

2. The deflection-compensated electro-hydraulic bending machine according to claim 1, characterized in that: The drive mechanism (2) includes two upright plates (21) and a bending hydraulic cylinder (25). The two upright plates (21) are respectively installed on the top sides of the machine base (1). The top of each of the two upright plates (21) is rotatably connected to a movable plate (22). The end of the movable plate (22) is hinged to a connecting rod (24). The bottom end of the connecting rod (24) is hinged to a lifting plate (3). The bending hydraulic cylinder (25) is hinged to the upright plate (21). The output shaft of the bending hydraulic cylinder (25) is hinged to one end of the movable plate (22). A connecting rod (23) is installed between the two upright plates (21).

3. The deflection-compensated electro-hydraulic bending machine according to claim 1, characterized in that: The lower wave plate (8) has a lower horizontal plate (82) at the top located between adjacent lower inclined blocks (81), the upper wave plate (9) has an upper horizontal plate (92) at the bottom located between adjacent upper inclined blocks (91), and the upper wave plate (9) has extension plates (94) at both ends.

4. The deflection-compensated electro-hydraulic bending machine according to claim 1, characterized in that: The extension plates (94) at both ends of the upper corrugated plate (9) are connected to cover plates (95), and the bottom of the cover plates (95) is equipped with sealing protrusions (96) that extend into the oil storage tank (93).

5. The deflection-compensated electro-hydraulic bending machine according to claim 4, characterized in that: The bottom of the sealing protrusion (96) is connected to a mounting post (961), and the mounting post (961) is movably connected to a movable block (962) that is in clearance fit with the conical hole (931). The bottom end of the movable block (962) is conical, and an oil storage cotton (97) that is passed through by the movable block (962) is installed in the oil storage tank (93).

6. The deflection-compensated electro-hydraulic bending machine according to claim 5, characterized in that: The top of the movable block (962) is provided with a movable hole (966) into which the bottom end of the mounting post (961) is movably inserted. A spring (963) sleeved on the mounting post (961) is installed between the bottom of the movable block (962) and the sealing protrusion (96). A movable rod (965) that is clearance-fitted with the oil leakage hole (932) is installed at the bottom of the movable block (962). The bottom end of the movable rod (965) protrudes out of the oil leakage hole (932) and the bottom end of the movable rod (965) is arc-shaped. A pressure ring (964) that presses against the oil storage cotton (97) is installed on the movable block (962).

7. The deflection-compensated electro-hydraulic bending machine according to claim 3, characterized in that: The extension plate (94) is located on the bottom side of the mounting base (6), the oil reservoir (93) extends to the extension plate (94), and the top of the cover plate (95) is provided with an oil filling hole (98) that passes through the sealing protrusion (96), and the oil filling hole (98) is threadedly connected to a plug.

8. The deflection-compensated electro-hydraulic bending machine according to claim 1, characterized in that: The lower corrugated plate (8) includes a positioning plate (85), the lower inclined block (81) and the lower horizontal plate (82) are mounted on the positioning plate (85), the top of the lower inclined block (81) is provided with a first pressure groove (83), the top of the lower horizontal plate (82) is provided with a second pressure groove (84) whose bottom inner wall is flush with the bottom inner wall of the first pressure groove (83), and the positioning plate (85) is connected by screws with a pressure strip (86) that passes through the first pressure groove (83) and the second pressure groove (84).

9. The deflection-compensated electro-hydraulic bending machine according to claim 8, characterized in that: The top of the positioning plate (85) is uniformly equipped with positioning posts (87), and the bottom of the lower inclined block (81) is provided with positioning holes into which the positioning posts (87) can be inserted.

10. The deflection-compensated electro-hydraulic bending machine according to claim 1, characterized in that: The top of the support frame (5) is provided with a groove (51), the inner cavity of the groove (51) is movably connected to the lower corrugated plate (8), and a push cylinder (52) for driving the lower corrugated plate (8) is installed on one side of the inner cavity of the groove (51).

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