Side changing device and hydraulic press

Abstract

The utility model relates to lateral mold changing device and hydraulic press, lateral mold changing device includes: frame, set up on the ground, support wheel has several, set up on the frame, mould, horizontal support is in the support wheel, and support wheel and mould rolling contact, conveying mechanism, set up in the middle part of frame, along the length direction of frame is established, the upper end of conveying mechanism sets up the sliding table, the grab hook is rotatably set up on the sliding table, and the front end of grab hook is connected with the upper end middle part of mould, conveying mechanism is configured as drive sliding table moves back and forth on the upper end of conveying mechanism, and mould moves on the support wheel and removes from lateral mold changing device into the workbench of hydraulic press or removes from the workbench of hydraulic press into lateral mold changing device, because the upper end of support wheel is higher than the upper surface of frame, and the cargo fork of forklift can lift the mould from the bottom of mould and carries out the taking and placing to the mould, realizes the quick replacement and quick removal and removal of mould and changes the mold changing device.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic press technology, and in particular to a side mold changing device and a hydraulic press. Background Technology

[0002] When a hydraulic press is used to stamp and forge workpieces of different shapes, the corresponding mold needs to be changed.

[0003] Due to the large weight of the molds, a movable worktable is usually used. The movable worktable is moved out of the hydraulic press frame, and the old mold is removed by a forklift and the new mold is loaded. Then, the movable worktable, with the help of the positioning and guiding structure, is quickly returned to the hydraulic press frame.

[0004] However, since the movable worktable needs to move via rollers, the rollers are prone to loosening and deformation after long-term use or under great pressure, causing the mold to shift, affecting the mold closing accuracy, and leading to an increase in the product defect rate.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model discloses a lateral mold changing device and a hydraulic press to solve the problem of decreased mold closing accuracy and increased product defect rate caused by loosening and deformation of the mold changing mechanism after long-term use.

[0007] The technical solution adopted in this utility model is as follows: A lateral mold changing device includes: a frame disposed on the ground; several rollers disposed on the frame; a mold horizontally supported on the rollers, with the rollers in rolling contact with the mold; and a conveying mechanism disposed in the middle of the frame and arranged along the length of the frame. A slide is provided at the upper end of the conveying mechanism, and a gripper is rotatably disposed on the slide. The front end of the gripper engages with the middle of the upper end of the mold. The conveying mechanism is configured to drive the slide to move back and forth at its upper end.

[0008] A further technical solution is that the lateral mold changing device includes: a plurality of guide wheels, which are horizontally arranged on both sides of the upper end of the frame and roll in contact with both sides of the mold.

[0009] A further technical solution is that the conveying mechanism includes: a slide rail, disposed in the middle of the frame and parallel to the length direction of the frame, the slide table being engaged with the upper end of the slide rail and capable of sliding along the slide rail; two sprockets, respectively rotatably disposed at the front and rear ends of the inner side of the slide rail; a chain, sleeved on the outside of the two sprockets, the two ends of the chain being respectively connected to the front and rear ends of the slide table; a reducer, fixed to the rear end of the side of the slide rail, the output end of which is connected to the sprocket; and two sets of proximity switches, respectively disposed at the front and rear ends of the side of the slide rail, each set having two switches, one of which is located at the rear end of the other proximity switch in each set.

[0010] A further technical solution is that the lateral mold changing device includes: several limiting brackets, which are disposed on the frame and spaced apart around the rear end and both sides of the mold when it is in the first position. The limiting bracket has a connected inclined surface and a vertical surface on the side near the mold. The inclined surface is located at the upper end of the vertical surface, and the upper end of the inclined surface is located on the side away from the mold at the lower end of the inclined surface; and four limiting posts, two of which are disposed on the front side of the upper end of the slide rail, and the other two are disposed on the rear side of the upper end of the slide rail. When the slide is in the first working position, the rear end of the slide abuts against the two limiting posts. When the slide is in the second working position, the front end of the slide abuts against the two limiting posts.

[0011] A further technical solution is that the lateral mold changing device includes: four protective covers, fixed on the frame, symmetrically arranged on both sides of the slide rail, and symmetrically arranged with respect to the central axis of the frame, with the upper end of the protective cover lower than the upper end of the support roller; and two limiting rods, arranged on one side of the frame, and respectively located on the rear side of the rear protective cover and the front side of the front protective cover.

[0012] A further technical solution is that several feet are provided on both sides of the frame, and the feet are bolted to the ground.

[0013] This utility model also discloses a hydraulic press, which includes: a frame, which is hollow and set on the ground; a worktable, which is set on the ground and located inside the frame; a mold clamp, which is set on the worktable and has a retractable clamp at its upper end; a mold release guide rail, which is vertically and vertically set on the worktable and is arranged along the length of the worktable, with a plurality of rotating wheels rotatably set at its upper end; and a lateral mold changing device as described above, which is set at the rear end of the frame and coaxially arranged with the worktable; wherein, when the mold release guide rail is lowered, the upper end of the rotating wheel is lower than the surface of the worktable, and when the mold release guide rail is raised, the upper end of the rotating wheel is higher than the surface of the worktable and flush with the upper end of the support roller; when the mold is in the second position, the mold clamp drives the clamp to move up and down to press or release the mold.

[0014] A further technical solution is that the hydraulic press includes a second guide wheel, which is disposed on the worktable and rolls in contact with both sides of the mold.

[0015] A further technical solution is that a limiting groove is opened at the front end of the mold, and the hydraulic press includes a limiting block, which is set on the worktable; wherein, when the mold is in the second position, the limiting block is engaged in the limiting groove.

[0016] A further technical solution is that the hydraulic press includes: a shim block, disposed between the upper end of the worktable and the lower end of the mold clamp; and a hydraulic pump station, disposed on the frame and connected to the oil port of the mold clamp via an oil pipe.

[0017] The beneficial effects of this utility model embodiment are as follows: (I) The side mold changing device of this utility model, by engaging the grab hook on the slide table with the middle of the upper end of the mold, the conveying mechanism drives the slide table to move back and forth at the upper end of the conveying mechanism, the slide table drives the grab hook and the mold to move back and forth, the mold moves on the support roller and moves from the side mold changing device into the worktable of the hydraulic press or from the worktable of the hydraulic press into the side mold changing device. Since the upper end of the support roller is higher than the upper surface of the frame, the forklift forks can lift the mold from the bottom of the mold and pick up and put down the mold, realizing the quick replacement of the mold and quick removal and movement out and into the mold changing device.

[0018] (ii) Further, after the mold moves to the second position on the rollers of the mold-lifting guide, the mold-lifting guide is lowered, and then the clamp is lowered. The clamp presses the mold onto the worktable to achieve rapid mold fixation. When it is necessary to change the mold, the clamp is raised first, and then the mold-lifting guide is raised. The rollers of the mold-lifting guide lift the mold, and the grab hook engages with the upper middle part of the mold. The conveying mechanism drives the slide to move back and forth on the upper end of the conveying mechanism. The slide moves the grab hook and the mold back and forth. The mold moves on the rollers and moves from the side mold-changing device into the worktable of the hydraulic press or from the worktable of the hydraulic press into the side mold-changing device, achieving rapid mold unlocking and fixation. The mold is directly pressed onto the worktable by the clamp, and the mold is firmly fixed, making the hydraulic press mold closing accurate and ensuring product quality. Attached Figure Description

[0019] Figure 1 This is an isometric view of the lateral mold changing device of this utility model.

[0020] Figure 2 for Figure 1 Enlarged view at point A.

[0021] Figure 3 This is a front view structural diagram of the hydraulic press of this utility model.

[0022] Figure 4This is a top view of the hydraulic press of this utility model.

[0023] Figure 5 This is an isometric view of the worktable in the hydraulic press of this utility model.

[0024] Figure 6 This is a cross-sectional view of the hydraulic press of this utility model in the raised state of the mold-lifting guide rail.

[0025] Figure 7 This is a cross-sectional view of the hydraulic press of this utility model in the lowered state of the mold-lifting guide rail.

[0026] Figure 8 This is a top view of part of the worktable structure in the hydraulic press of this utility model. In the picture: 1. Frame; 101. Crossbar; 102. Vertical bar; 11. Support roller; 12. First guide wheel; 13. Anchor; 14. Expansion bolt; 15. Protective cover; 16. Limiting rod; 17. Limiting bracket; 2. Conveying mechanism; 21. Slide rail; 22. Slide table; 23. Grab hook; 231. Slot; 24. Sprocket; 25. Chain; 26. Reducer; 27. Limiting post; 28. Proximity switch; 3. Mold; 31. Clamping block; 32. Limiting groove; 4. Hydraulic press; 41. Frame; 42. Workbench; 421. Second guide wheel; 422. Limiting block; 423. Groove; 5. Mold clamp; 51. Elevating block; 52. Pressure clamp; 6. Mold release guide rail; 61. Rotary wheel; 7. Hydraulic pump station. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] First embodiment: This embodiment discloses a lateral mold changing device.

[0029] The side mold changing device includes a frame 1, a support roller 11, a mold 3, and a conveying mechanism 2.

[0030] like Figure 1As shown, frame 1 is set on the ground. Several rollers 11 are provided on frame 1, and mold 3 is horizontally supported on the rollers 11, with the rollers 11 in rolling contact with mold 3. For example, frame 1 is a square frame formed by welding together several square tubes. Several longitudinal bars 102 parallel to the width direction of frame 1 are provided inside frame 1 to improve its support strength. Two horizontal bars 101 are also provided on frame 1, parallel to the length direction of frame 1, and rollers 11 are spaced apart on the horizontal bars 101. Mold 3 is always supported on the rollers 11 until it completely leaves frame 1.

[0031] like Figure 2As shown, the conveying mechanism 2 is located in the middle of the frame 1, along the length of the frame 1. A slide 22 is provided at the upper end of the conveying mechanism 2, and a gripper 23 is rotatably mounted on the slide 22. The front end of the gripper 23 engages with the middle of the upper end of the mold 3. The conveying mechanism 2 is configured to drive the slide 22 to move back and forth at its upper end. Exemplarily, the conveying mechanism 2 includes a slide rail 21, a sprocket 24, a chain 25, a reducer 26, and a proximity switch 28. The slide rail 21 is located in the middle of the frame 1, parallel to the length of the frame 1. The slide 22 is engaged with the upper end of the slide rail 21 and can slide along the slide rail 21. Specifically, the slide rail 21 is embedded in the middle of the upper end of the frame 1 and welded to the frame 1 to prevent the slide 22 and gripper 23 from being too high, making it difficult to cooperate with the support roller 11 and the mold 3. There are two sprockets 24, rotatably mounted at the front and rear ends inside the slide rail 21, respectively. A chain 25 is fitted around the outside of two sprockets 24, with its two ends connected to the front and rear ends of the slide table 22, respectively. A reducer 26 is fixed to the rear end of the slide rail 21, with its output end connected to the sprocket 24. Specifically, a rotating shaft passes through and is fixedly connected to the sprocket 24, and the rotating shaft passes through the slide rail 21 and is coupled to the output end of the reducer 26. Preferably, a tensioning device is also provided on the side of the slide rail 21, and the chain 25 is tensioned after passing over the tensioning device to prevent slippage and ensure timely movement. Two sets of proximity switches 28 are provided, located at the front and rear ends of the slide rail 21, respectively. Each set has two switches, with one proximity switch 28 located at the rear end of the other. In the set of proximity switches closer to the rear end, the proximity switch 28 at the front end, when triggered, controls the reducer 26 to decelerate, while the proximity switch 28 at the rear end, when triggered, controls the reducer 26 to stop working. In a set of proximity switches 28 near the front end, the proximity switch 28 at the rear end controls the reducer 26 to decelerate when triggered, while the proximity switch 28 at the front end controls the reducer 26 to stop working when triggered. A locking block 31 is provided at the middle of the upper end of the mold 3, and a locking groove 231 is provided on the lower side of the front end of the gripper hook 23. The gripper hook 23 is manually rotated to engage the locking block 31 into the locking groove 231 and disengage it from the locking groove 231. Preferably, the lower end of the gripper hook 23 has an inclined surface on the front side of the locking groove 231, with the front end of the inclined surface above the rear end of the inclined surface. When the gripper hook 23 moves, the locking block 31 pushes up the inclined surface and automatically engages with the locking block 31, allowing the gripper hook 23 to quickly engage the mold 3, saving manpower and preventing operators from approaching the hydraulic press 4, thus improving safety.

[0032] like Figure 1 As shown, the lateral mold changing device further includes a first guide wheel 12. Several first guide wheels 12 are horizontally arranged on both sides of the upper end of the frame 1, and roll in contact with both sides of the mold 3.

[0033] like Figure 1As shown, the lateral mold changing device further includes limiting brackets 17 and limiting posts 27. Several limiting brackets 17 are arranged on the frame 1, spaced apart around the rear end and sides of the mold 3 when it is in the first position. The limiting bracket 17 has a connected inclined surface and a vertical surface on the side near the mold 3. The inclined surface is located at the upper end of the vertical surface, and the upper end of the inclined surface is located on the side away from the mold 3 from the lower end of the inclined surface. When a forklift picks up the mold 3 and places it into the lateral mold changing mechanism, the mold 3 slides along the inclined surface into the groove formed by the vertical surfaces of the limiting brackets 17, facilitating the rapid positioning of the mold 3 in the first position. Four limiting posts 27 are arranged, two side-by-side along the width direction of the frame 1 at the front of the upper end of the slide rail 21, and the other two side-by-side along the width direction of the frame 1 at the rear of the upper end of the slide rail 21. When the slide table 22 is in the first working position, its rear end abuts against the two limiting posts 27 located at the rear end of the frame 1. When the slide table 22 is in the second working position, its front end abuts against the two limiting posts 27 located at the front end of the frame 1, thus limiting the range of movement of the slide table 22. Specifically, the first position is the position where the rear end of the mold 3 abuts against the limiting bracket 17.

[0034] like Figure 1 As shown, the lateral mold-changing device further includes protective covers 15 and limiting rods 16. Four protective covers 15 are fixed to the frame 1, symmetrically arranged on both sides of the slide rail 21, and symmetrically arranged relative to the central axis parallel to the width direction of the frame 1. The upper end of the protective cover 15 is lower than the upper end of the support roller 11 to prevent the forklift from damaging the lateral mold-changing device when it picks up the mold 3 and places it onto the lateral mold-changing mechanism. Specifically, the protective covers 15 are installed on the frame 1 and the longitudinal rod 102. Two limiting rods 16 are installed on one side of the frame 1, located behind the rear protective cover 15 and in front of the front protective cover 15, respectively, restricting the entry position of the forklift forks and preventing collisions that could cause positioning failure or damage to the lateral mold-changing device.

[0035] like Figure 1 As shown, furthermore, several feet 13 are provided on both sides of the frame 1, and the feet 13 are bolted to the ground to make the frame 1 firmly connected to the ground. Specifically, expansion bolts 14 are buried in the ground, and the part of the expansion bolts 14 exposed in the ground passes through the feet 13 and is threadedly connected to the nuts.

[0036] In this embodiment, by engaging the hook 23 on the slide 22 with the upper middle part of the mold 3, the conveying mechanism 2 drives the slide 22 to move back and forth at the upper end of the conveying mechanism 2. The slide 22 drives the hook 23 and the mold 3 to move back and forth. The mold 3 moves on the support roller 11 and moves from the side mold changing device into the worktable 42 of the hydraulic press 4 or from the worktable 42 of the hydraulic press 4 into the side mold changing device. Since the upper end of the support roller 11 is higher than the upper surface of the frame 1, the forklift forks can lift the mold 3 from the bottom of the mold 3 and pick up and put down the mold 3, realizing the quick replacement and quick removal and movement of the mold 3 into and out of the mold changing device.

[0037] Second embodiment: This embodiment discloses a hydraulic press 4.

[0038] like Figure 3 and Figure 4 As shown, the hydraulic press 4 includes a frame 41, a worktable 42, a mold clamp 5, a mold lifting guide rail 6, and a lateral mold changing device according to the first embodiment.

[0039] The frame 41 is a hollow structure mounted on the ground. The worktable 42 is also mounted on the ground and located within the frame 41. The mold clamp 5 is mounted on the worktable 42, with a retractable clamp 52 at its upper end. The mold release guide rail 6 is vertically and vertically mounted on the worktable 42, extending along its length, and has several rotatable rollers 61 at its upper end. A lateral mold changing device is located at the rear end of the frame 41, coaxially with the worktable 42. When the mold release guide rail 6 is lowered, the upper ends of the rollers 61 are below the surface of the worktable 42; when the mold release guide rail 6 is raised, the upper ends of the rollers 61 are above the surface of the worktable 42 and flush with the upper end of the support roller 11. The rollers 61 support the lower end of the mold 3 and roll in contact with the mold 3. When the mold 3 is in the second position, the mold clamp 5 drives the clamp 52 to rise and fall, pressing or releasing the mold 3. Specifically, the second position is the working position of the mold 3 during stamping and forging. Figures 5-7 As shown, for example, two grooves 423 are formed on the worktable 42 along its length direction. The mold lifting guide rail 6 is set in the groove 423. The mold lifting guide rail 6 adopts a commercially available mold lifting device. A lifting cylinder is set at the lower end of the mold lifting guide rail 6. The lifting cylinder is supplied with oil pressure by the oil supply port and lifts the mold lifting guide rail 6. When the oil pressure supply is cut off, the spring between the mold lifting guide rail 6 and the lifting cylinder provides elastic force to pull the mold lifting guide rail 6 down.

[0040] like Figure 3 As shown, the hydraulic press 4 further includes a second guide wheel 421, which is disposed on the worktable 42 and rolls in contact with both sides of the mold 3.

[0041] like Figure 4 As shown, furthermore, a limiting groove 32 is formed at the front end of the mold 3, and the hydraulic press 4 includes a limiting block 422, which is set on the worktable 42. When the mold 3 is in the second position, the limiting block 422 is engaged in the limiting groove 32 to restrict the position of the mold 3.

[0042] like Figure 4 and Figure 8As shown, the hydraulic press 4 further includes a raising block 51 and a hydraulic pump station 7. The raising block 51 is positioned between the upper end of the worktable 42 and the lower end of the mold clamp 5, raising the position of the high-pressure clamp 52 to avoid interference with the mold 3. The hydraulic pump station 7 is mounted on the frame 41 and is connected to the oil port of the mold clamp 5 via an oil pipe to supply or return oil to the rod-side or rodless side of the mold clamp 5, thereby driving the clamp 52 to rise and fall.

[0043] In this embodiment, after the mold 3 moves to the second position on the roller 61 of the mold-lifting guide 6, the mold-lifting guide 6 is lowered, and then the clamp 52 is lowered. The clamp 52 presses the mold 3 onto the worktable 42 to achieve rapid fixation of the mold 3. When it is necessary to change the mold 3, the clamp 52 is raised first, and then the mold-lifting guide 6 is raised. The roller 61 of the mold-lifting guide 6 lifts the mold 3, and the grab hook 23 engages with the upper middle part of the mold 3. The conveying mechanism 2 drives the slide table 22 to move back and forth at the upper end of the conveying mechanism 2. The slide table 22 drives the grab hook 23 and the mold 3 to move back and forth. The mold 3 moves on the roller 61 and moves from the side mold-changing device into the worktable 42 of the hydraulic press 4 or from the worktable 42 of the hydraulic press 4 into the side mold-changing device, realizing rapid unlocking and fixation of the mold 3. The mold 3 is directly pressed onto the worktable 42 by the clamp 52, and the mold 3 is firmly fixed, so that the hydraulic press 4 closes the mold accurately and ensures product quality.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A lateral mold changing device, characterized in that, The lateral mold changing device includes: The frame is set on the ground; Several support rollers are mounted on the frame. The mold is horizontally supported on the support rollers, and the support rollers are in rolling contact with the mold. A conveying mechanism is located in the middle of the frame and is arranged along the length of the frame. A slide is provided at the upper end of the conveying mechanism, and a gripper is rotatably provided on the slide. The front end of the gripper engages with the middle of the upper end of the mold. The conveying mechanism is configured to drive the slide to move back and forth at the upper end of the conveying mechanism.

2. The lateral mold changing device according to claim 1, characterized in that, The lateral mold changing device includes: The guide wheels, which are of several sizes, are horizontally arranged on both sides of the upper end of the frame and roll in contact with both sides of the mold.

3. The lateral mold changing device according to claim 1, characterized in that: The conveying mechanism includes: A slide rail is provided in the middle of the frame and is parallel to the length direction of the frame. The slide table is engaged with the upper end of the slide rail and can slide along the slide rail. There are two sprockets, which are rotatably disposed at the front and rear ends of the inner side of the slide rail; A chain is fitted around the outside of the two sprockets, and the two ends of the chain are respectively connected to the front and rear ends of the slide. The speed reducer is fixed to the rear end of the side of the slide rail, and its output end is connected to the sprocket. The proximity switches are arranged in two sets, one at the front end and the other at the rear end of the slide rail. Each set has two switches, with one of the proximity switches located at the rear end of the other.

4. The lateral mold changing device according to claim 3, characterized in that, The lateral mold changing device includes: A plurality of limiting brackets are provided on the frame and spaced apart around the rear end and sides of the mold when it is in the first position. The limiting bracket has a connected inclined surface and a vertical surface on the side near the mold. The inclined surface is located at the upper end of the vertical surface, and the upper end of the inclined surface is located on the side away from the mold from the lower end of the inclined surface. There are four limiting posts, two of which are located on the front side of the upper end of the slide rail and the other two are located on the rear side of the upper end of the slide rail. When the slide is in the first working position, the rear end of the slide abuts against the two limiting posts. When the slide is in the second working position, the front end of the slide abuts against the two limiting posts.

5. The lateral mold changing device according to claim 3, characterized in that, The lateral mold changing device includes: The protective cover has four parts, which are fixed to the frame and symmetrically arranged on both sides of the slide rail. They are also symmetrically arranged with respect to the central axis of the frame. The upper end of the protective cover is lower than the upper end of the support roller. There are two limiting rods, which are set on one side of the frame and located on the rear side of the rear protective cover and the front side of the front protective cover, respectively.

6. The lateral mold changing device according to claim 1, characterized in that: Several feet are provided on both sides of the frame, and the feet are bolted to the ground.

7. A hydraulic press, characterized in that, The hydraulic press includes: The frame, set on the ground, is a hollow structure; The workbench is set on the ground and located inside the frame; A clamping device is set on the worktable, and has a retractable clamp at the upper end; The mold-lifting guide rail is vertically mounted on the worktable and is arranged along the length of the worktable. Several rotating wheels are rotatably mounted on the upper end. The lateral mold changing device as described in any one of claims 1 to 6 is disposed at the rear end of the frame and coaxially arranged with the worktable; Specifically, when the mold-lifting guide rail is lowered, the upper end of the rotating wheel is lower than the surface of the worktable; when the mold-lifting guide rail is raised, the upper end of the rotating wheel is higher than the surface of the worktable and flush with the upper end of the support roller; when the mold is in the second position, the mold clamp drives the clamp to rise and fall to press or release the mold.

8. The hydraulic press according to claim 7, characterized in that, The hydraulic press includes: The second guide wheel is set on the worktable and makes rolling contact with both sides of the mold.

9. The hydraulic press according to claim 7, characterized in that, The mold has a limiting groove at its front end, and the hydraulic press includes: A limiting block is provided on the worktable; When the mold is in the second position, the limiting block is engaged in the limiting groove.

10. The hydraulic press according to claim 7, characterized in that, The hydraulic press includes: A shim block is positioned between the upper end of the worktable and the lower end of the mold clamp. A hydraulic pump station is installed on the frame and connected to the oil port of the mold clamp via an oil pipe.

Images