Horizontal machining hydraulic clamp

Abstract

The utility model relates to a horizontal machining hydraulic clamp which comprises a bottom plate. A base is arranged on the bottom plate; two ends of the upper surface of the base are respectively provided with a left column and a right column; a transverse plate is arranged at the tops of the left upright and the right upright; a lifting plate is arranged in the middle of the base; a supporting plate is slidably arranged on the lifting plate; a left thick limiting block and a right thick limiting block are arranged at the two ends of the supporting plate respectively; two thick limiting plates are arranged on the inner side of the supporting plate; a coarse positioning block is arranged on the supporting plate and between the two coarse limiting plates; a handle is arranged outside the supporting plate; a plurality of sliding rods are uniformly arranged in the middle of the supporting plate; a single-point positioning seat and a double-point positioning seat are respectively arranged on two sides of the base; a surface positioning block is arranged at the top of the single-point positioning seat; rear positioning blocks are arranged at the two ends of the top of the double-point positioning seat; side positioning columns are arranged on the inner side surfaces of the right upright columns; and an energy accumulator and a pressure gauge are respectively arranged on the transverse plate. The clamping device is convenient to assemble and disassemble, capable of automatically adjusting clamping and high in product precision, and has high universality and universality.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a horizontal hydraulic fixture. Background Technology

[0002] As is well known, the precision requirements for hydraulic component machining are increasingly stringent, especially for critical dimensions, which are often achieved by completing all machining operations in a single clamping operation. Hydraulic housings are a prime example. Their open and locating hole sides contain critical machining elements such as mounting surfaces, locating holes, and locating pin holes, all requiring very high precision. Therefore, the hydraulic housing needs to be placed vertically, allowing for machining of all elements on both ends of the housing in a single clamping operation on a horizontal machining center. However, due to the complex shape of hydraulic housings, vertical positioning is difficult, necessitating the use of fixtures for fixation. While existing fixtures can barely clamp the components, they often experience vibrations and unstable clamping during machining, leading to inconsistent dimensional accuracy and low machining efficiency. Furthermore, existing fixtures require machining only one part before re-clamping and fixing the remaining parts for machining. Given the weight of hydraulic housings, manually or using a lifting device to place them into the frame-type fixture is difficult, further reducing machining efficiency. These problems have long plagued machining manufacturers and require solutions. Utility Model Content

[0003] This utility model primarily addresses the technical problems of inconvenient loading and unloading and low work efficiency in existing technologies. To solve these problems, a horizontal hydraulic clamping fixture is designed. Three points are selected on the lower side of the hydraulic housing as surface positioning points. Clamping at one of these surface positioning points near the opening side is difficult. If clamping is placed outside the hydraulic housing, interference from the clamping mechanism will inevitably affect the machining of the opening side end face. Therefore, clamping must be placed inside the hydraulic housing. However, due to the limited internal space, manual clamping is very difficult. Hydraulic clamping simplifies everything. Furthermore, two auxiliary support points are added on both sides of this surface positioning point, and two auxiliary clamps are correspondingly placed on the upper side of the hydraulic housing. This effectively solves the problem of unstable machining dimensions. In addition, this fixture features a very convenient loading and unloading mechanism. The upper part is a support plate with a coarse limiting mechanism, ensuring a consistent position of the hydraulic housing product after each placement on the support plate. The lower part of the support plate is a lifting plate with a medium-sized push-pull cylinder at its bottom. Additionally, a slider is installed at the bottom of the pallet, and a slide rail is installed at the top of the lifting plate. This allows the pallet to slide easily and freely inwards or outwards. The pallet initially lies outside the clamp. The loading and unloading process is as follows: First, the hydraulic housing product is placed into the pallet. Then, the pallet is manually pushed inwards. Once in position, the lifting plate descends under the action of a medium-sized push-pull cylinder. After the hydraulic housing product is positioned, the lifting plate continues to move down a safe distance to avoid repeated positioning. After processing, the unloading process is the reverse of the loading process.

[0004] Furthermore, this fixture employs a hydraulic clamp; aside from manually pushing in and pulling out the hydraulic housing product, all other actions are performed automatically by hydraulics, resulting in very high production efficiency. In summary, this fixture solution can be applied to most horizontal machining centers, has wide applicability, and fundamentally solves the aforementioned problems.

[0005] This utility model discloses a horizontal machining center hydraulic fixture for convenient loading and unloading of hydraulic housings. The fixture mainly includes a base plate, frame, single-point positioning seat and surface positioning block, double-point positioning seat and surface positioning column, left floating support seat, right floating support seat, automatically adjustable clamping mechanism, convenient loading and unloading mechanism, high-quality hydraulic components, etc. It can be directly installed on a horizontal machining center for use, and can complete the machining of all key elements of the hydraulic housing such as mounting and positioning surfaces, positioning holes, and positioning pin holes in one operation. The multi-point comprehensive clamping makes the machining process more stable and reliable. Using this hydraulic fixture is not only convenient for loading and unloading, but more importantly, it can produce high-precision hydraulic housing products, making it a highly preferred solution.

[0006] This utility model provides a horizontal hydraulic clamp, including a base plate; a base is provided on the base plate; a left column and a right column are respectively provided at both ends of the upper surface of the base; and a horizontal plate is provided on the top of the left column and the right column.

[0007] A lifting plate is provided in the middle of the base; a support plate is slidably provided on the lifting plate; a left coarse limiting block and a right coarse limiting block are respectively provided at both ends of the support plate; two coarse limiting plates are provided on the inner side of the support plate; a coarse positioning block is provided on the support plate and between the two coarse limiting plates; a handle is provided on the outer side of the support plate; and multiple sliding rods are evenly provided in the middle of the support plate.

[0008] A single-point positioning seat and a double-point positioning seat are respectively provided on both sides of the base; a surface positioning block is provided on the top of the single-point positioning seat; and a rear positioning block is provided at both ends of the top of the double-point positioning seat.

[0009] A side positioning post is provided on the inner side of the right column;

[0010] An accumulator and a pressure gauge are respectively installed on the horizontal plate.

[0011] Furthermore, the base is mounted on the bottom plate via multiple upright plates.

[0012] Furthermore, a medium-sized push-pull cylinder is provided in the middle of the lower surface of the base; the push cylinder of the medium-sized push-pull cylinder passes upward through the base and connects to the lifting plate; guide rods are provided at the four lower corners of the lifting plate; guide sleeves are provided at the four upper corners of the base; the guide rods can move up and down within the guide sleeves.

[0013] Furthermore, slide rails are provided at both ends of the lifting plate; sliders are provided at both ends of the bottom of the tray; and the sliders are slidably disposed within the slide rails.

[0014] Furthermore, support plate limiting blocks are respectively provided at both ends of the upper and lower slide rails of the lifting plate.

[0015] Furthermore, surface positioning posts are provided on the top of the dual-point positioning seat and the side of the rear positioning block.

[0016] Furthermore, a lever clamping cylinder is provided in the middle of the single-point positioning seat; two hydraulic single-acting support cylinders are provided on the outer side of the base; and an extended support rod is provided at the telescopic end of the hydraulic single-acting support cylinder.

[0017] Furthermore, a large-sized push-pull cylinder is provided on the rear side of the horizontal plate; a double-point main clamping plate is rotatably mounted on the push rod end of the large-sized push-pull cylinder; pressure feet are provided at both ends of the double-point main clamping plate; the pressure feet on the double-point main clamping plate correspond vertically to the positions of the surface positioning posts; a small-sized push-pull cylinder is provided on the front side of the horizontal plate; a double-point auxiliary clamping plate is rotatably mounted on the push rod end of the small-sized push-pull cylinder; pressure feet are provided at both ends of the double-point auxiliary clamping plate, and the pressure feet on the double-point auxiliary clamping plate correspond vertically to the positions of the extended support rods.

[0018] Furthermore, a hydraulic single-acting long-stroke push cylinder is provided on the inner side of the left column; the push rod of the hydraulic single-acting long-stroke push cylinder is located on the same horizontal line as the side positioning column.

[0019] The horizontal hydraulic clamp of this utility model is implemented as follows: the front, back, left and right views of this utility model are based on the front view;

[0020] The base plate and frame constitute the main body of this fixture. The base plate has mounting holes for fixing to the worktable of the horizontal machining center using hexagonal screws. The frame mainly consists of upright plates, a base, a left column, a right column, and a horizontal plate. The four upright plates are connected to the base plate at the bottom and to the base at the top. The left side of the upper end of the base connects to the left column, and the right side connects to the right column. The tops of the left and right columns connect to the horizontal plate. The horizontal plate, columns, and base form the accommodating space of the hydraulic housing. Two first hydraulic manifold blocks are installed on the front upright plate, each with a first flow valve. A second hydraulic manifold block is installed on the front side of the base, with a second flow valve. The main frame of this horizontal machining center hydraulic fixture is made of alloy steel and has undergone effective heat treatment, providing sufficient rigidity and excellent shock resistance, ensuring stable machining.

[0021] Due to the complex shape and difficulty in positioning of the hydraulic housing, this fixture adopts a six-point positioning system. The two face positioning posts on the double-point positioning seat and the face positioning block on the single-point positioning seat contact and position the lower side of the housing. The two rear positioning blocks on the double-point positioning seat contact and position the rear side of the housing. The side positioning post on the right column contacts and positions the right side of the housing. The above positioning settings fully meet the blank reference requirements of the hydraulic housing and enable accurate machining.

[0022] The hydraulic components mainly include lever clamping cylinders, large-sized push-pull cylinders, medium-sized push-pull cylinders, small-sized push-pull cylinders, hydraulic single-acting support cylinders, left-side switching valves, right-side switching valves, first sequence valves, second sequence valves, third sequence valves, fourth sequence valves, first flow valves, second flow valves, pressure reducing valves, accumulators, and pressure gauges. The left-side switching valves, right-side switching valves, and the first, second, third, and fourth sequence valves are all mounted on the base plate. Two first flow valves are mounted on the first oil passage block of the front upright plate of the frame, one second flow valve is mounted on the second oil passage block of the frame base, one third flow valve is mounted on the large-sized push-pull cylinder, one lever clamping cylinder is mounted in the middle of the single-point positioning seat, one medium-sized push-pull cylinder and two hydraulic single-acting support cylinders are mounted on the frame base, and the large-sized push-pull cylinder, small-sized push-pull cylinder, pressure reducing valve, accumulator, and pressure gauges are mounted on the horizontal plate of the frame. The third flow valve is located on the side of the large-sized push-pull cylinder. Each pressure gauge is equipped with a protective cover to prevent damage.

[0023] Because the hydraulic housing is placed vertically within this fixture and has a complex shape, to address these unique characteristics, this fixture is equipped with three main clamping points and two auxiliary clamping points. Both the two main clamping points and the two auxiliary clamping points, located on the frame's horizontal plate, have automatic adjustment functions. One of the main clamping points is located inside the hydraulic housing, passing through a large casting hole on the lower side of the hydraulic housing. A lever clamping cylinder is installed on the single-point positioning seat. Its clamping point, after its pressure plate passes through the large casting hole on the lower side of the hydraulic housing, is directly aligned with the face positioning block on the single-point positioning seat. Additionally, a second hydraulic circuit block and a second flow valve are installed in the clamping hydraulic circuit of the lever clamping cylinder. The second hydraulic circuit block is installed on the front side of the base, and the second flow valve is installed on the second hydraulic circuit block. This design allows for adjustment of the clamping speed of the lever clamping cylinder's pressure plate, facilitating control of the overall action sequence.

[0024] The other two automatically adjustable main clamping devices are located at the rear of the hydraulic housing. Two guide blocks are respectively installed on the upper inner side of the left column and the rear column. The ends of the guide blocks are provided with vertical guide grooves. Both ends of the double-point main clamping plate and the double-point auxiliary clamping plate can slide up and down in the guide grooves. A large-sized push-pull cylinder is installed on the rear side of the horizontal plate. A third flow valve is installed on the side of the large-sized push-pull cylinder to adjust the speed of the action. Its push rod is threaded to a large connector. The other end of the large connector is connected to the double-point main clamping plate through a coarse connecting pin and a snap ring. Both ends of the double-point main clamping plate are threaded to pressure feet. The two pressure feet are respectively facing the face positioning pins on the double-point positioning seat. This clamping can prevent the hydraulic housing from deforming. The upper and lower sides of the hydraulic housing are both rough surfaces. Due to the significant dimensional variation of these rough surfaces, the contact points between the two pressure feet and the upper side cannot be at the same height, resulting in a slight deviation. If all clamping components were rigidly connected without gaps, one pressure foot would inevitably be in contact while the other remains suspended, failing to effectively clamp the hydraulic housing. To address this, a small gap of 0.03mm to 0.05mm is provided between the two sides of the double-point main clamping plate and the guide groove side of the guide block, providing guidance in the front-to-back direction. A gap of 2.5mm to 3.5mm is provided between the two ends of the double-point main clamping plate and the bottom surface of the guide groove of the guide block. Furthermore, the double-point main clamping plate is connected to the large connector via a coarse connecting pin and a snap ring, allowing it to rotate around the coarse connecting pin and providing automatic adjustment. In summary, when one pressure foot is suspended, the double-point main clamping plate rotates. With the continued pushing of the large-size push-pull cylinder, both pressure feet can contact the upper side of the hydraulic housing, ultimately achieving effective main clamping.

[0025] To ensure a more stable and reliable clamping of the hydraulic housing, two automatically adjustable auxiliary clamping points are also installed. Two hydraulic single-acting support cylinders are installed at both ends of the opening side of the lower side of the hydraulic housing. Their extended support rods pass through the support plate and contact and support the lower side of the hydraulic housing. The hydraulic single-acting support cylinders are respectively installed on the left floating support seat and the right floating support seat, and the two support seats are fixed to the base.

[0026] Two auxiliary clamping points are located on the front side of the front horizontal plate of the hydraulic housing. A small push-pull cylinder is installed on the front side, and its push rod is threaded to a small connector. The other end of the small connector is connected to a double-point auxiliary clamping plate via a connecting pin and a snap ring. Both ends of the double-point auxiliary clamping plate are threaded to pressure feet, and the two pressure feet are respectively aligned with the extended support rods of the two hydraulic single-acting support cylinders. This clamping method can prevent deformation of the hydraulic housing. As mentioned above, due to the large dimensional variation of the hydraulic housing blank surface, one of the pressure feet may become suspended and unable to effectively assist in clamping the hydraulic housing. To address this, a small gap of 0.03mm to 0.05mm is set between the two sides of the double-point auxiliary clamping plate and the side of the guide groove; a gap of 2.5mm to 3.5mm is set between the two ends of the double-point auxiliary clamping plate and the bottom surface of the guide groove, ultimately enabling it to rotate around the connecting pin and providing an automatic adjustment function. In summary, when one of the pressure feet becomes suspended, the dual-point auxiliary clamping plate will rotate. As the small push-pull cylinder continues to push, both pressure feet can contact the upper side of the hydraulic housing, thus achieving effective auxiliary clamping.

[0027] Excessive clamping force should not be applied to the opening side of the hydraulic housing, otherwise it will cause the housing to deform under clamping force, thus affecting the machining accuracy. In order to adjust the magnitude of the auxiliary clamping force, a pressure reducing valve and a pressure gauge are installed in the oil circuit of the small-sized push-pull cylinder. The pressure reducing valve can reduce the pressure of the hydraulic oil, thereby adjusting the magnitude of the auxiliary clamping force. In addition, the pressure gauge can monitor the pressure of the oil circuit at any time.

[0028] A hydraulic single-acting long-stroke push cylinder is installed on the left column. Its push rod is directly opposite the side positioning post on the right column. The push cylinder clamps the hydraulic housing, making the side positioning more accurate and reliable.

[0029] The loading and unloading mechanism consists of a pallet, a left coarse limiting block, a right coarse limiting block, a sliding rod, a coarse limiting plate, a coarse positioning block, a slider, a lifting plate, a slide rail, a pallet limiting stop, a guide column, a guide sleeve, a lifting rod, a medium-sized push-pull cylinder, a first oil circuit block, and a first flow valve. The pallet has a left coarse limiting block and a right coarse limiting block at its left and right ends, respectively. Two coarse limiting plates are located at its rear, with a coarse positioning block between them. Four sliding rods are evenly distributed in the middle of the pallet, with the upper part of each rod being cylindrical to significantly reduce friction. A slider is located on the lower surface of the pallet, and a slide rail is located on the upper surface of the lifting plate. The slider is slidably positioned within the slide rail.

[0030] Hold the handle on the outside of the pallet and pull it outwards. The outer edge of the pallet contacts the pallet limit block installed on the outside of the lifting plate. At this point, the pallet is in its initial position. When the hydraulic housing is placed into the pallet, the left and right sides of the hydraulic housing correspond to the left and right coarse limit blocks, respectively. The coarse positioning gap is generally between 0.5mm and 1.5mm. In addition, the mounting holes of the left and right coarse limit blocks are designed as elongated holes. If they are not suitable, their positions can be adjusted as needed. At this point, the lower side of the hydraulic housing contacts the four sliding rods. After placement, push the hydraulic housing inwards. Due to the small friction with the four sliding rods, the housing will easily slide inwards until the inner edge of the pallet contacts the pallet limit block installed on the inner side of the lifting plate. At this point, the pallet is in the pushed-in position. Finally, the rear side of the housing contacts the two coarse limit plates and is coarsely positioned, and the lower side finally contacts the coarse positioning block and is coarsely positioned. The push-in and pull-out strokes are generally between 128mm and 132mm.

[0031] Four guide rods are evenly arranged below the lifting plate, with sliding fit between the guide rods and guide sleeves. The four guide sleeves are mounted on the base. A lifting rod is located in the middle of the lower surface of the lifting plate, with its other end threadedly connected to the push rod of a medium-sized push-pull cylinder, which is fixed to the bottom of the base. When the medium-sized push-pull cylinder performs a pull-back action, the hydraulic housing, support plate, lifting plate, guide rods, etc., will descend along the guide sleeves until the lower side of the hydraulic housing contacts and positions itself against the surface positioning pins on the two double-point positioning seats and the surface positioning block on the single-point positioning seat. Except for the housing, other components will continue to descend a safe distance, generally between 8mm and 12mm, to ensure that the components on the support plate are completely separated from the hydraulic housing, avoiding repeated contact that could affect the correct positioning of the hydraulic housing. The descending or rising stroke is between 68mm and 72mm. In addition, a first oil circuit block and a first flow valve are installed in both the lowering oil circuit and the raising oil circuit of the medium-sized push-pull cylinder. The two first oil circuit blocks are installed on the front upright plate of the frame, and the first flow valve is installed on the first oil circuit block. Through the above design, the speed of lifting and lowering can be adjusted, which is convenient for control.

[0032] This fixture controls the various hydraulic actuators in the following way:

[0033] Connect the hydraulic power unit to the fixture. Hydraulic oil enters the fixture's oil circuit, flowing into the accumulator and pressure gauge. The accumulator then helps maintain stable oil pressure throughout the circuit. First, the hydraulic oil drives the medium-sized push-pull cylinder, lowering the hydraulic housing until it contacts and positions itself against the face positioning block and face positioning post. Then, manually push the hydraulic housing so that its rear side contacts and positions itself against the rear positioning blocks on the two double-point positioning seats. This pushing displacement is very small, merely to eliminate gaps. Next, the first sequence valve activates, driving the hydraulic single-acting push cylinder on the left column to hold the housing in place, completing the positioning. Then, the lever clamping cylinder and the large push-pull cylinder on the horizontal plate activate, completing the main clamping. Next, the second sequence valve activates, driving the two hydraulic single-acting support cylinders to provide auxiliary support for the hydraulic housing. Finally, the third sequence valve activates, driving the small push-pull cylinder on the horizontal plate to complete the auxiliary clamping. This completes the positioning and clamping of the hydraulic housing, allowing for debugging and machining.

[0034] After processing is complete, reconnect the hydraulic station to the fixture. Hydraulic oil will enter the fixture's oil circuit, driving the lever clamping cylinder to release, rotating the pressure plate back to its initial position. Simultaneously, the large and small push-pull cylinders will pull back, retracting the dual-point main clamping plate and dual-point auxiliary clamping plate to their initial positions. Then, the fourth sequence valve activates, driving the medium-sized push-pull cylinder to push out, raising the hydraulic housing product to the push-in position. Hold the handle on the outside of the support plate and pull the hydraulic housing product out to its initial position for easy removal.

[0035] Compared with the prior art, the horizontal hydraulic clamp provided by this utility model:

[0036] 1. This utility model device uses a pallet and a lifting plate in combination, which facilitates the loading and unloading of products. At the same time, this utility model device is equipped with side positioning posts and left and right coarse limiting blocks for limiting, which increases the convenience of clamping and positioning when the product is placed vertically.

[0037] 2. Most of the clamping actions of this utility model device are automatically executed by hydraulics, resulting in very high production efficiency and high product precision. It is suitable for processing the vast majority of hydraulic housing products. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the horizontal hydraulic clamp of this utility model initially installed in the hydraulic housing.

[0039] Figure 2 This is a front view of the horizontal hydraulic clamp of this utility model before the hydraulic housing is installed.

[0040] Figure 3This is a rear view of the horizontal hydraulic clamp of this utility model before the hydraulic housing is installed.

[0041] Figure 4 This is a schematic diagram of the internal structure of the horizontal hydraulic clamp loading and unloading mechanism of this utility model.

[0042] Figure 5 This is a front view of the hydraulic housing product of the horizontal hydraulic clamp of this utility model.

[0043] Figure 6 This is a rear view of the hydraulic housing of the horizontal hydraulic clamping fixture of this utility model.

[0044] Figure 7 This is a schematic diagram of the hydraulic housing product installed at the push-in position of the horizontal hydraulic clamp of this utility model.

[0045] Figure 8 This is a schematic diagram of the horizontal hydraulic clamping fixture of this utility model without the hydraulic housing installed at the push-in position.

[0046] Figure 9 This is a structural schematic diagram of the hydraulic housing product installed at the drop position of the horizontal hydraulic clamp of this utility model.

[0047] Figure 10 This is a structural schematic diagram of the horizontal hydraulic clamping fixture for clamping hydraulic housing products according to this utility model.

[0048] Figure 11 This is a structural schematic diagram of the horizontal hydraulic clamping fixture of this utility model without the hydraulic housing being clamped.

[0049] Figure 12 This is a schematic diagram of the double-point positioning seat and its upper component of the horizontal hydraulic clamp of this utility model.

[0050] Reference numerals: 1. Workbench; 2. Base plate; 3. Positioning plate; 4. Base; 5. Support plate; 6. Handle; 7. Left coarse limit block; 8. Right coarse limit block; 9. Lower side; 10. Slide rod; 11. Rear side; 12. Coarse limit plate; 13. Coarse positioning block; 14. Right side switch valve; 15. First connector; 16. Left side switch valve; 17. Second connector; 18. Medium-sized push-pull cylinder; 19. Guide rod; 20. Guide sleeve; 21. Lifting plate; 22. Double-point positioning seat; 23. Surface positioning column; 24. Single-point positioning seat; 25. Surface positioning block; 26. Vertical plate; 27. First oil circuit block; 28. 1. Flow valve; 29. ​​Rear positioning block; 30. First sequence valve; 31. Left column; 32. Hydraulic single-acting long-stroke push cylinder; 34. Left side; 35. Right side; 36. Right column; 37. Side positioning column; 38. Lever clamping cylinder; 39. Large-size push-pull cylinder; 40. Second flow valve; 41. Double-point main clamping plate; 43. Upper side; 44. Second sequence valve; 45. Hydraulic single-acting support cylinder; 46. Extended support rod; 47. Third sequence valve; 48. Pressure reducing valve; 49. Horizontal plate; 50. Small-size push-pull cylinder; 51. Double-point auxiliary clamping plate; 53. Accumulator; 55. Fourth sequence valve. Detailed Implementation

[0051] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0052] like Figure 1 As shown in the figure, a horizontal hydraulic clamp provided by this utility model includes a base plate 2; a base 4 is provided on the base plate 2; a left column 31 and a right column 36 are respectively provided at both ends of the upper surface of the base 4; and a horizontal plate 49 is provided on the top of the left column 31 and the right column 36.

[0053] A lifting plate 21 is provided in the middle of the base 4; a support plate 5 is slidably provided on the lifting plate 21; a left coarse limiting block 7 and a right coarse limiting block 8 are respectively provided at both ends of the support plate 5; two coarse limiting plates 12 are provided on the inner side of the support plate 5; a coarse positioning block 13 is provided on the support plate 5 and between the two coarse limiting plates 12; a handle 6 is provided on the outer side of the support plate 5; and multiple sliding rods 10 are evenly provided in the middle of the support plate 5.

[0054] A single-point positioning seat 24 and a double-point positioning seat 22 are respectively provided on both sides of the base 4; a surface positioning block 25 is provided at one top end of the single-point positioning seat 24; and a rear positioning block 29 is provided at both ends of the top of the double-point positioning seat 22.

[0055] The inner side of the right column 36 is provided with a side positioning column 37; the inner side of the left column 31 is provided with a hydraulic single-acting long-stroke push cylinder 32; the push rod of the hydraulic single-acting long-stroke push cylinder 32 and the side positioning column 37 are located on the same horizontal line.

[0056] An accumulator 53 and two pressure gauges are respectively installed on the horizontal plate. Each pressure gauge is covered with a protective cover to prevent damage to the pressure gauges.

[0057] The base 4 is mounted on the bottom plate 2 by four upright plates 26, which form a rectangle at the bottom of the base 4.

[0058] A medium-sized push-pull cylinder 18 is provided in the middle of the lower surface of the base 4; the push cylinder of the medium-sized push-pull cylinder 18 passes upward through the base 4 and connects to the lifting plate 21; guide rods 19 are provided at the four lower corners of the lifting plate 21; guide sleeves 20 are provided at the four upper corners of the base 4; the guide rods 19 can move up and down within the guide sleeves 20. Slide rails are provided at both ends of the lifting plate 21; sliders are provided at both ends of the bottom of the support plate 5; the sliders are slidably disposed within the slide rails. Support plate limiting blocks are provided at both ends of the lifting plate and the slide rails to restrict the movement trajectory of the support plate.

[0059] The top of the dual-point positioning seat 22 and the side of the rear positioning block 29 are provided with surface positioning posts 23. The upper middle part of the single-point positioning seat 24 is provided with a lever clamping cylinder 38; the outer side of the base 4 is provided with two hydraulic single-acting support cylinders 45; the telescopic end of the hydraulic single-acting support cylinder 45 is provided with an extended support rod 46, and the extended support rod 46 does not interfere with the lifting plate 21.

[0060] A large-sized push-pull cylinder 39 is provided on the rear side of the horizontal plate 49; a double-point main clamping plate 41 is rotatably mounted on the push rod end of the large-sized push-pull cylinder 39; pressure feet are provided at both ends of the double-point main clamping plate 41; the pressure feet on the double-point main clamping plate 41 correspond vertically to the positions of the surface positioning posts 23; a small-sized push-pull cylinder 50 is provided on the front side of the horizontal plate 49; a double-point auxiliary clamping plate 51 is rotatably mounted on the push rod end of the small-sized push-pull cylinder 50; pressure feet are provided at both ends of the double-point auxiliary clamping plate 51, and the pressure feet on the double-point auxiliary clamping plate 51 correspond vertically to the positions of the extended support rod 46.

[0061] The working process of this utility model:

[0062] First, hoist the hydraulic fixture onto the worktable 1 of the horizontal machining center. Place the two reference edges of the base plate 2 against the two positioning plates 3 on the worktable 1 and tighten the hex socket screws. Then, pass the hex socket screws through the mounting holes of the base plate 2 and screw them into the corresponding threaded holes on the worktable 1. This completes the positioning and clamping of the hydraulic fixture on the horizontal machining center.

[0063] Hold the handle 6 on the outside of the tray 5 and pull the tray outward to the initial position. Place the hydraulic housing product into the tray 5, positioning it between the left coarse limiting block 7 and the right coarse limiting block 8, with the lower side 9 in contact with the four sliding rods 10. Be careful to place it as far inward as possible to prevent it from falling. Then, hold the handle 6 on the outside of the tray and push the housing product inward until its rear side 11 contacts and is roughly positioned with the two coarse limiting plates 12, and its lower side 9 contacts and is roughly positioned with the coarse positioning block 13, reaching the pushed-in position.

[0064] Connect the hydraulic station's outlet pipe to the first connector 15 of the right-side switch valve 14, and connect the hydraulic station's return pipe to the second connector 17 of the left-side switch valve 16. Turn off both knobs, and the hydraulic oil in the outlet pipe enters the clamp's oil circuit. The hydraulic oil drives the medium-sized push-pull cylinder 18 to perform a pull-back action. The guide rod 19 slides downwards within the guide sleeve 20, causing the hydraulic housing product, along with the support plate 5, lifting plate 21, etc., to descend until the lower side 9 of the hydraulic housing contacts and positions itself against the two surface positioning posts 23 on the double-point positioning seat 22 and the surface positioning block 25 on the single-point positioning seat 24. Afterward, the support plate 5, lifting plate 21, etc., continue to descend a safe distance to ensure that the components on the support plate 5 are completely separated from the hydraulic housing. If the descent speed is not appropriate, adjust the first flow valve 28 on the left oil circuit block 27 on the front upright plate 26. The oil in the oil chamber pushed up by the medium-sized push-pull cylinder 18 will flow back to the hydraulic station along the clamp's oil circuit and return pipe.

[0065] At this point, the pressure of the hydraulic oil in the hydraulic station's outlet pipe is not increased. The first, second, third, and fourth sequence valves will not open, and other hydraulic single-acting long-stroke push cylinders, lever clamping cylinders, large push-pull cylinders, hydraulic single-acting support cylinders, and small push-pull cylinders will not operate, thus ensuring safety. Next, the hydraulic housing is manually pushed so that the rear side 11 contacts and positions itself against the two rear positioning blocks 29 on the double-point positioning seat 22. This pushing displacement is very small, merely to eliminate any gap that may occur between the hydraulic housing and the rear positioning blocks 29 during descent, and is completed instantaneously.

[0066] Afterwards, the pressure of the hydraulic oil in the hydraulic station's outlet pipe is increased, and the first sequence valve 30 automatically opens. The hydraulic oil drives the hydraulic single-acting long-stroke push cylinder 32 on the left column 31 to perform an outward action. The push rod of the hydraulic single-acting long-stroke push cylinder 32 contacts and pushes the clamping mechanism against the left side 34 of the hydraulic housing, causing the right side 35 of the housing to contact and position itself against the side positioning post 37 on the right column 36. Simultaneously, the lever clamping cylinder 38 and the large-size push-pull cylinder 39 also begin to operate. Because their oil circuits are respectively equipped with a second flow valve 40 and a third flow valve, the adjustment and control of the second flow valve 40 and the third flow valve ensure that the hydraulic single-acting long-stroke push cylinder 32 completes the push-tightening first, while the lever clamping cylinder 38 and the large-size push-pull cylinder 39 complete the clamping and push-tightening simultaneously afterwards. Rotating the pressure plate of the lever clamping cylinder 38 completes the main clamping inside the hydraulic housing. When the lever clamping cylinder 38 releases, the oil in the oil chamber flows back to the hydraulic station along the clamp oil circuit and the return oil pipe. The large-size push-pull cylinder 39 pushes the double-point main clamping plate 41 downward, featuring a clever automatic adjustment design that ensures both pressure feet on the double-point main clamping plate 41 can contact and clamp with the upper side 43 of the hydraulic housing. When the large-size push-pull cylinder 39 pulls back, the oil in the oil chamber flows back to the hydraulic station along the clamp oil circuit and return oil pipe.

[0067] The pressure of the hydraulic oil in the hydraulic station's outlet pipe is further increased, and the second sequence valve 44 automatically opens. The hydraulic oil drives the two hydraulic single-acting support cylinders 45 to move, pushing out two extended support rods 46 that pass through the support plate 5 and contact the lower side 9 of the hydraulic housing to complete auxiliary support. The pressure of the hydraulic oil in the hydraulic station's outlet pipe is further increased, and the third sequence valve 47 automatically opens. The hydraulic oil flows through the pressure reducing valve 48, reducing the hydraulic oil pressure. Excessive clamping force should not be applied to the open side of the hydraulic housing, otherwise it will cause the housing to deform under clamping force, thus affecting machining accuracy. Then, the small push-pull cylinder 50 on the drive plate 49 pushes the double-point auxiliary clamping plate 51 downwards. Due to the ingenious automatic adjustment design, both pressure feet 52 on the double-point auxiliary clamping plate 51 can contact the upper side 43 of the hydraulic housing to complete auxiliary clamping. The oil in the oil chamber pulled back by the small push-pull cylinder 50 flows back to the hydraulic station along the clamp oil circuit and return oil pipe.

[0068] Remove the oil outlet and return pipes of the hydraulic station, and close the knobs of the left switch valve 16 and the right switch valve 14. This completes the positioning and clamping of the hydraulic housing, and it is ready for debugging and processing.

[0069] After machining, remove waste chips and cutting fluid from the fixture and hydraulic housing. Then connect the left switch valve 16 and the right switch valve 14, connect the oil outlet pipe of the hydraulic station to the second connector 17 of the left switch valve 16, and connect the oil return pipe of the hydraulic station to the first connector 15 of the right switch valve 14. Turn off the two knobs, and the oil in the oil chambers of the two hydraulic single-acting support cylinders 45, the hydraulic single-acting long-stroke push cylinder 32, and the accumulator 53 will flow back to the hydraulic station along the fixture oil circuit and the oil return pipe. The extended support rod 46 of the hydraulic single-acting support cylinder and the push rod of the hydraulic single-acting long-stroke push cylinder will retract to their initial positions. Hydraulic oil from the outlet pipe enters the oil circuit of the clamp, driving the lever clamping cylinder 38 to perform a releasing action. The pressure plate of the rotating lever clamping cylinder 38 retracts to its initial position, simultaneously driving the large push-pull cylinder 39 and the small push-pull cylinder 50 to perform a pulling action, pulling the dual-point main clamping plate 41 and the dual-point auxiliary clamping plate 51 back to their initial positions. This completes the release of the hydraulic housing product.

[0070] Then, increase the pressure of the hydraulic oil in the hydraulic station outlet pipe. The fourth sequence valve 55 automatically opens, and the hydraulic oil drives the push-pull cylinder 18 to perform the push-out action, raising the hydraulic housing product to the push-in position. Hold the handle 6 on the outside of the support plate 5 and pull the hydraulic housing product out to the initial position.

[0071] Finally, remove the hydraulic housing product. Repeat the above steps when reinstalling the product.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A horizontal hydraulic clamp, characterized in that, Includes a base plate (2); a base (4) is provided on the base plate (2); a left column (31) and a right column (36) are respectively provided at both ends of the upper surface of the base (4); a horizontal plate (49) is provided on the top of the left column (31) and the right column (36); A lifting plate (21) is provided in the middle of the base (4); a support plate (5) is slidably provided on the lifting plate (21); a left coarse limiting block (7) and a right coarse limiting block (8) are respectively provided at both ends of the support plate (5); two coarse limiting plates (12) are provided on the inner side of the support plate (5); a coarse positioning block (13) is provided on the support plate (5) and between the two coarse limiting plates (12); a handle (6) is provided on the outer side of the support plate (5); and multiple sliding rods (10) are evenly provided in the middle of the support plate (5). A single-point positioning seat (24) and a double-point positioning seat (22) are respectively provided on both sides of the base (4); a surface positioning block (25) is provided on the top of the single-point positioning seat (24); and a rear positioning block (29) is provided at both ends of the top of the double-point positioning seat (22). A side positioning post (37) is provided on the inner side of the right column (36); An accumulator (53) and a pressure gauge are respectively installed on the horizontal plate.

2. The horizontal hydraulic clamping fixture according to claim 1, characterized in that, The base (4) is mounted on the bottom plate (2) via multiple upright plates (26).

3. The horizontal hydraulic clamp according to claim 2, characterized in that, A medium-sized push-pull cylinder (18) is provided in the middle of the lower surface of the base (4); the push cylinder of the medium-sized push-pull cylinder (18) passes upward through the base (4) and connects to the lifting plate (21); guide rods (19) are provided at the four lower corners of the lifting plate (21); guide sleeves (20) are provided at the four upper corners of the base (4); the guide rods (19) can move up and down in the guide sleeves (20).

4. The horizontal hydraulic clamp according to claim 3, characterized in that, The lifting plate (21) is provided with slide rails at both ends; the bottom of the support plate (5) is provided with sliders at both ends; the sliders are slidably disposed within the slide rails.

5. The horizontal hydraulic clamp according to claim 4, characterized in that, The lifting plate and the upper slide rail are respectively equipped with plate limiting blocks at both ends.

6. The horizontal hydraulic clamp according to claim 1, characterized in that, The top of the dual-point positioning seat (22) and the side of the rear positioning block (29) are provided with surface positioning posts (23).

7. The horizontal hydraulic clamping fixture according to claim 6, characterized in that, A lever clamping cylinder (38) is provided in the middle of the single-point positioning seat (24); two hydraulic single-acting support cylinders (45) are provided on the outer side of the base (4); and an extended support rod (46) is provided at the telescopic end of the hydraulic single-acting support cylinder (45).

8. The horizontal hydraulic clamp according to claim 7, characterized in that, A large-sized push-pull cylinder (39) is provided on the rear side of the horizontal plate (49); a double-point main clamping plate (41) is rotatably provided at the push rod end of the large-sized push-pull cylinder (39); pressure feet are provided at both ends of the double-point main clamping plate (41); the pressure feet on the double-point main clamping plate (41) correspond vertically to the position of the surface positioning column (23); a small-sized push-pull cylinder (50) is provided on the front side of the horizontal plate (49); a double-point auxiliary clamping plate (51) is rotatably provided at the push rod end of the small-sized push-pull cylinder (50); pressure feet are provided at both ends of the double-point auxiliary clamping plate (51), and the pressure feet on the double-point auxiliary clamping plate (51) correspond vertically to the position of the extended support rod (46).

9. The horizontal hydraulic clamp according to claim 1, characterized in that, The inner side of the left column (31) is provided with a hydraulic single-acting long-stroke push cylinder (32); the push rod of the hydraulic single-acting long-stroke push cylinder (32) and the side positioning column (37) are located on the same horizontal line.

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