Hydraulic clamp for hydraulic housing vertical machining center

Abstract

The utility model provides a hydraulic clamp for hydraulic shell vertical machining center, include: bottom plate and set up on the inclined plate of bottom plate, set up the centering mandrel in the middle part of inclined plate, four thick limit rods are arranged on the inclined plate and the centering mandrel circumference, lever clamping cylinder is arranged on the four corners of the inclined plate respectively, face positioning column is arranged on the inner side of lever clamping cylinder of the inclined plate, the utility model discloses can carry out processing to integer angle and decimal angle simultaneously, and is more general, has saved the cost.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a hydraulic fixture for a vertical machining center with a hydraulic housing. Background Technology

[0002] The market demand for hydraulic components is growing, and they are constantly being updated and replaced, with large production volumes. One type of hydraulic housing product has a positioning hole in the inner cavity of its concave end. The angle between the axis of this positioning hole and the central axis of the housing product is usually an integer angle. However, with the increasing demand for high performance or special applications of hydraulic housing products, this angle is increasingly being designed as a decimal. Decimal angles increase the difficulty of machining the positioning hole.

[0003] This patent specifically corresponds to a hydraulic housing product (such as...). Figure 6-7 As shown), there is an inner cavity positioning hole 26 in the concave side cavity. The angle between the axis of this inner cavity positioning hole and the central axis of the shell product is 17.5°. This inner cavity positioning hole has 3 diameter dimensions and chamfer dimensions. In addition, a center drill is needed to drill the center hole. This requires multiple tools to complete the processing. The most suitable equipment is to process it on a vertical machining center, which can not only achieve high production efficiency, but also ensure the accuracy of angular dimensions.

[0004] When machining holes with angular requirements on a vertical machining center, one method is to create an angled slant fixture and then directly mount it onto the worktable. However, this type of fixture is relatively simple and cannot be used on a four-axis bridge plate. This method is rarely used because it requires a lot of auxiliary time when changing fixtures. The most common method is to use a four-axis fixture, which can meet different machining angle requirements and improve the efficiency of fixture changes. The four-axis fixture is mounted on the worktable of the vertical machining center, and then a flat fixture without angle is mounted onto the bridge plate of the four-axis fixture. The four-axis fixture generally does not need to be changed. The quick-change positioning sleeve on the flat fixture and the quick-change positioning pin on the bridge plate provide quick-change positioning, eliminating the auxiliary time previously required for fixture changes. This makes fixture changes not only fast but also very precise, resulting in very high efficiency. Different angles can be achieved through the rotation of the four axes. Four-axis machines have integer angles and decimal angles. Four-axis machines with integer angles cannot rotate to produce decimal angles, so it is impossible to machine positioning holes with decimal angles using a flat fixture. Furthermore, while four-axis machining centers capable of producing positioning holes with decimal angles can do so, they are expensive, thus increasing product manufacturing costs. These issues have long plagued machining manufacturers, and the industry has been searching for effective solutions. Utility Model Content

[0005] This utility model mainly solves the technical problems of existing technology, such as the inability to process positioning holes with integer and decimal angles at the same time and the high cost. It proposes a hydraulic fixture for a vertical machining center with a hydraulic housing, which can process both integer and decimal angles at the same time, and is more versatile and saves costs.

[0006] This utility model provides a hydraulic fixture for a vertical machining center with a hydraulic housing. It is a slant plate fixture, where the angle between the bottom and top positioning surfaces of the slant plate and the angle between the axis of the positioning hole and the central axis of the housing product are the same. Even at decimal angles, the axis of the positioning hole can be parallel to the spindle axis of the vertical machining center, thus enabling the machining of the positioning hole. Furthermore, a quick-change positioning sleeve is provided under the fixture's base plate for rapid installation onto a four-axis fixture. Through these designs, this fixture possesses versatility, allowing direct installation onto a standard vertical machining center worktable or onto a four-axis fixture, offering exceptional flexibility. In addition, clamping and releasing are hydraulically controlled, and it also features air detection and air-blowing cleaning functions, making this fixture more effective for mass production.

[0007] This utility model provides a hydraulic fixture for a vertical machining center with a hydraulic housing, comprising: a base plate and an inclined plate disposed on the base plate;

[0008] A centering spindle is provided in the middle of the inclined plate; four coarse limiting rods are provided on the inclined plate and the centering spindle in the circumferential direction.

[0009] Lever clamping cylinders are respectively installed at the four corners of the inclined plate; surface positioning posts are installed on the inclined plate and inside the lever clamping cylinders.

[0010] Furthermore, air nozzles are provided on the sides of the inclined plate and the surface positioning column, with the air outlet of the air nozzles facing the top surface of the surface positioning column;

[0011] Furthermore, the centering mandrel is positioned in the middle of the inclined plate via a positioning seat; a diamond pin is provided on the positioning seat and the side of the centering mandrel; a diamond pin guide head is provided on the top of the diamond pin.

[0012] Furthermore, a centering guide head is provided at the top of the centering mandrel; the centering mandrel is provided with multiple chamfered surfaces evenly distributed around its circumference.

[0013] Furthermore, an air vent is provided at the center of the top surface of the positioning post.

[0014] Furthermore, the angle range of the inclined plate is 15-35 degrees;

[0015] Furthermore, two lifting bolts are respectively installed on the front and rear sides of the base plate.

[0016] Furthermore, quick-change positioning sleeves are symmetrically arranged on the left and right sides of the bottom surface of the base plate;

[0017] Two base plate positioning pins can be detachably installed on the rear side of the bottom surface of the base plate.

[0018] Furthermore, the upper surface of the base plate is provided with central mounting holes on the left and right sides respectively;

[0019] Coarse guide holes are provided on the upper surface of the base plate and the side of the middle mounting hole; the two coarse guide holes are arranged diagonally.

[0020] Furthermore, both the centering guide head and the diamond-shaped guide head are made of copper.

[0021] The hydraulic fixture for a vertical machining center with a hydraulic housing provided by this utility model has the following advantages compared with the prior art:

[0022] 1. This utility model discloses a hydraulic fixture for a vertical machining center with a hydraulic housing. It is an inclined plate fixture. The angle between the bottom positioning surface and the top positioning surface of the inclined plate and the angle between the axis of the positioning hole to be processed and the central axis of the housing product are the same. Even when the angle is a decimal, the axis of the positioning hole can be made parallel to the spindle axis of the vertical machining center, thereby realizing the processing of the positioning hole.

[0023] 2. This utility model features a quick-change positioning sleeve under the base plate of the fixture, allowing for rapid installation onto a four-axis fixture. Through this design, the fixture achieves versatility, allowing it to be directly installed on a standard vertical machining center table or on a four-axis fixture, demonstrating exceptional flexibility. Attached Figure Description

[0024] Figure 1 This is an overall schematic diagram of the present invention installed in a four-axis fixture.

[0025] Figure 2 This is a schematic diagram of the structure of the four-axis clamp of this utility model.

[0026] Figure 3 This is a schematic diagram of the front structure of the fixture of this utility model.

[0027] Figure 4 This is a schematic diagram of the structure behind the fixture of this utility model.

[0028] Figure 5 This is a schematic diagram of the bottom surface of the fixture of this utility model.

[0029] Figure 6 This is a top view of the hydraulic housing product of this utility model.

[0030] Figure 7 This is a bottom view of the hydraulic housing product of this utility model.

[0031] Figure 8This is an overall schematic diagram of the present invention installed on the workbench.

[0032] Reference numerals: 1. Four-axis clamp; 2. Base plate positioning pin; 3. Lifting bolt; 4. Bridge plate; 5. Base plate; 6. Coarse guide hole; 7. Coarse guide pin; 8. Quick-change positioning sleeve; 9. Quick-change positioning pin; 10. Central mounting hole; 11. Corner mounting hole; 12. Air nozzle; 13. Surface positioning post; 14. Small positioning hole; 15. U-shaped groove; 16. Coarse limit rod; 17. Large inner hole; 18. Centering mandrel guide head; 19. Diamond pin guide head; 20. Centering mandrel; 21. Diamond pin; 22. Flange face; 23. Top surface; 24. Lever clamping cylinder; 25. Pressure plate; 26. Inner cavity positioning hole; 27. T-slot. Detailed Implementation

[0033] 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.

[0034] like Figure 3-5 As shown in the figure, a hydraulic fixture for a vertical machining center with a hydraulic housing provided by this utility model includes: a base plate 5 and an inclined plate disposed on the base plate 5;

[0035] The planar side of the inclined plate contacts the upper plane of the base plate and is positioned by two internally threaded cylindrical pins. A semi-circular recess is provided on the upper part of the cylindrical pins on the inclined plate to facilitate the installation and removal of the pins. The inclined plate is also secured to the base plate by four hexagonal socket head cap screws. A centering mandrel 20, diamond pin 21, surface positioning post 13, coarse guide rod, lever clamping cylinder 24, and other components are mounted on the inclined surface of the inclined plate. The inclined plate needs to be machined in a single setup on a vertical machining center's four-axis configuration or a horizontal machining center. This significantly reduces machining deviations caused by multiple setups, resulting in high machining accuracy for the inclined plate.

[0036] A centering mandrel 20 is provided in the middle of the inclined plate; four coarse limiting rods 16 are arranged circumferentially on the inclined plate and the centering mandrel 20; the four U-shaped grooves of the hydraulic housing product correspond to the four coarse limiting rods 16 respectively, and the gaps between them are relatively large, which serves as a coarse limiting function. When the housing product is installed, under the action of coarse limiting, the product is restricted to a very small range, and then positioned with the centering mandrel 20 and the diamond pin 21, so that the housing product can be installed easily and accurately.

[0037] Lever clamping cylinders 24 are respectively installed at the four corners of the inclined plate. The flange dimensions on the convex side of this hydraulic housing product are almost the same as the outer contour dimensions of the housing. Although a side recess is made on the inner side of the flange to increase the area of ​​the inner plane of the flange, the space is still relatively small. If the pressure plate 25 of the lever clamping cylinder 24 extends into the side recess for clamping, there is still a risk of interference with the housing product. Therefore, the clamping position is selected at the four corners of the flange, and the four lever clamping cylinders 24 are symmetrically arranged on the left and right sides near the four corners. The space here is relatively large, and there will be no interference with the housing product during the flipping process when the pressure plate clamps or releases, which is safer and more reliable. A surface positioning post 13 is provided on the inclined plate and inside the lever clamping cylinder 24.

[0038] Air nozzles 12 are provided on the sides of the inclined plate and the surface positioning post 13, with the air outlet of the air nozzles 12 facing the top surface of the surface positioning post 13; the air nozzles are connected to the air passage. Before the housing product is installed, compressed air for blowing comes from the air blowing pipe, the four-axis clamp, the automatic connector, the air blowing passage of the clamp, and finally blows out from the air nozzles, which will quickly blow away the waste debris, waste liquid, waste oil and other impurities remaining on the surface positioning post, ensuring accurate and effective surface positioning.

[0039] Furthermore, the centering spindle 20 is positioned in the middle of the inclined plate via a positioning seat; a diamond pin 21 is provided on the positioning seat and the side of the centering spindle 20; a diamond pin guide head is provided on the top of the diamond pin 21.

[0040] The centering mandrel 20 is topped with a centering guide head; both the centering guide head and the diamond pin guide head 19 are made of copper. The centering mandrel 20 and the diamond pin 21 serve to center and orient the product, ensuring precise positioning after the hydraulic housing is installed in the fixture. The centering mandrel 20 has four chamfered edges around its circumference, with four chamfered surfaces evenly distributed around its circumference. Only four smaller cylindrical surfaces are left for centering, allowing the housing product to be easily installed into the centering mandrel 20 without sacrificing centering accuracy. These four chamfered surfaces are symmetrical in pairs, facilitating the measurement of the cylindrical surface of the centering mandrel after machining. The centering mandrel 20 is topped with a copper guide head, and the diamond pin 21 is topped with a diamond pin guide head 19. The diamond pin guide head 19 is made of copper and first contacts the centering guide head and diamond pin guide head 19 of the centering mandrel 20 when the housing product is installed, thus providing excellent protection for the housing product.

[0041] A vertical through-hole is provided in the center of the face positioning post 13, and the bottom of the through-hole is connected to the air detection air passage of the fixture. After the hydraulic housing product is installed, the flange face on the convex side of the hydraulic housing contacts and positions itself against the top surface 23 of the four face positioning posts 13. At this time, compressed air for air detection flows from the air detection air pipe, the four-axis fixture, the automatic connector, the air detection air passage of the fixture, and finally reaches the bottom of the face positioning post, and then reaches the air port on the top surface through the through-hole. If the flange face on the convex side contacts the top surface of the face positioning post perfectly without gaps, no air leakage will occur, and the control system of the machining center will determine that the air detection is qualified and continue to execute the subsequent actions. Conversely, if there is no perfect contact and there are gaps, air leakage will occur, and the control system of the machining center will determine that the air detection is unqualified, stop immediately, and provide alarm information to inform the operator to handle the situation. This effectively avoids the occurrence of scrap due to incorrect face positioning and continued execution of subsequent actions, demonstrating excellent intelligence.

[0042] The angle of the inclined plate ranges from 15 to 35 degrees, and is preferably 17.5 degrees in this embodiment. The angle of the inclined plate is mainly limited by the size of the tool holder of the tool used to machine the positioning hole in the inner cavity and the size of the inner cavity opening of the housing. If it exceeds this range, the tool holder will interfere with the inner cavity opening of the housing and cannot be machined.

[0043] Two lifting bolts 3 are respectively provided on the front and rear sides of the base plate 5 to facilitate the lifting of this fixture and provide convenience for loading and unloading. Quick-change positioning sleeves (8) are symmetrically arranged on the left and right sides of the bottom surface of the base plate 5; two base plate positioning pins are detachably arranged on the rear side of the bottom surface of the base plate 5. The two quick-change positioning sleeves 8 and the quick-change positioning pins 9 on the four-axis fixture bridge plate are quickly positioned. Since the top positioning surface of the quick-change positioning pins 9 is a conical surface, the positioning accuracy is very high. In addition, the four-axis fixture is not removed, and the machining center already has its center coordinates. After this fixture is installed, quick change is realized.

[0044] The upper surface of the base plate 5 is provided with intermediate mounting holes 10 on the left and right sides respectively; coarse guide holes 6 are provided on the upper surface of the base plate 5 and the sides of the intermediate mounting holes 10 respectively; the two coarse guide holes 6 are arranged diagonally. The two coarse guide holes 6 provide coarse guidance with the coarse guide pins 7 on the bridge plate, which not only plays a role in pre-positioning, but also provides good protection for the quick-change positioning sleeve and quick-change positioning pin.

[0045] In addition, four automatic connectors are set on the lower surface of the base plate 5. The oil inlet pipe, oil outlet pipe, air detection pipe, and air blowing pipe of the vertical machining center are connected to the four automatic connectors of the four-axis fixture. The oil and air finally enter the clamping oil circuit, releasing oil circuit, air detection air circuit, and air blowing air circuit in the fixture through the four automatic connectors, respectively, to provide power for the movement of the fixture.

[0046] The working process of this utility model is as follows: Figure 1-2As shown, first, install the four-axis fixture 1 onto the worktable of the vertical machining center. Since the four-axis fixture 1 is not frequently disassembled, this step can generally be omitted. Remove the two base plate locating pins 2 from the fixture and store them for future use. Then, use the lifting bolts 3 to hoist the fixture above the four-axis fixture bridge plate 4, aligning the two coarse guide holes 6 on the base plate 5 with the two coarse guide pins 7 on the bridge plate 4, and slowly lower the fixture for pre-positioning. Continue lowering until the two quick-change locating sleeves 8 under the base plate 5 and the two quick-change locating pins 9 on the bridge plate 4 are engaged, and the base plate 5 and bridge plate 4 are fully fitted. Next, pass multiple hexagon socket screws through the two mounting holes 10 in the middle of the base plate, the quick-change locating sleeves 8, and the quick-change locating pins 9, and screw them into the bridge plate. After tightening, the locating cone surfaces of the quick-change locating sleeves 8 and quick-change locating pins 9 are fully engaged for precise positioning. Finally, pass the four hex socket screws through the four corner mounting holes 11 on the base plate and screw them into the bridge plate. This completes the positioning and clamping of this fixture on the four-axis fixture.

[0047] First, manually clean the fixture, then activate the air blowing button on the control panel of the vertical machining center. The four air blowing nozzles 12 will spray compressed air to thoroughly clean the top surface 23 of the four face positioning columns 13 in order to perform subsequent air inspection.

[0048] With the convex end of the hydraulic housing facing downwards and the small positioning hole 14 on the convex end face facing outwards, the product is lifted onto the top of the fixture using a lifting device and slowly lowered. The four U-shaped grooves 15 are aligned with the four coarse limiting rods 16. Once the U-shaped grooves 15 are fitted into the coarse limiting rods 16, the housing product is confined to a very small area. The large inner hole 17 on the convex end of the housing product aligns with the centering mandrel guide head 18, and the small positioning hole 14 on the convex end face aligns with the diamond pin guide head 19. As the housing product continues to descend, the large inner hole 17 first contacts and coarsely positions itself with the centering mandrel guide head 18, and then contacts and finely positions itself with the centering mandrel 20. Next, the small positioning hole 14 contacts and coarsely positions itself with the diamond pin guide head 19, and then contacts and finely positions itself with the diamond pin 21. The product continues to descend until the flange face 22 on the convex side contacts and positions itself with the top surface 23 of the four positioning pins.

[0049] Activate the hydraulic clamping button on the control panel of the vertical machining center. The four lever clamping cylinders 24 rotate the pressure plate 25 to clamp the housing product. Then, activate the air test button on the control panel. If air leakage occurs on the top surface 23 of the positioning column, the control system will determine that the air test is unqualified, immediately stop, and provide an alarm message to notify the operator. If no air leakage occurs, the control system will determine that the air test is qualified, and machining of the positioning holes 26, etc., in the concave end side inner cavity can begin.

[0050] After the housing product is processed, activate the hydraulic release button on the control panel. The four lever clamping cylinders 24 rotate the pressure plate 25 and return to the initial position, completing the release of the housing product. Repeat the above steps to process the next housing product.

[0051] Alternatively, when using this fixture directly on the worktable of a vertical machining center, hoist the fixture onto the worktable using the lifting bolts 3, align the two base plate positioning pins 2 with the T-slots 27 of the worktable, and slowly insert it. At this point, the base plate positioning pins 2 and the T-slots 27 are precisely positioned, and the four corner mounting holes 11 are also directly above the T-slots 27 of the worktable. Then, place the four T-blocks below the corner mounting holes 11, and finally screw the T-blocks through the corner mounting holes 11 with hex socket screws to secure the fixture to the worktable. Then, you can perform centering and other adjustment work. The specific operation for loading and unloading hydraulic housing products is the same as described above and will not be repeated.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 the present invention.

Claims

1. A hydraulic fixture for a vertical machining center with a hydraulic housing, characterized in that, include: The base plate (5) and the inclined plate set on the base plate (5); A centering mandrel (20) is provided in the middle of the inclined plate; four coarse limiting rods (16) are provided circumferentially on the inclined plate and the centering mandrel (20). Lever clamping cylinders (24) are respectively installed at the four corners of the inclined plate; a surface positioning post (13) is installed on the inside of the lever clamping cylinders (24) on the inclined plate.

2. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 1, characterized in that, An air nozzle (12) is provided on the side of the upper and lower positioning posts (13) of the inclined plate, and the air outlet of the air nozzle (12) faces the top surface (23) of the positioning posts (13).

3. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 1, characterized in that, The centering spindle (20) is set in the middle of the inclined plate by a positioning seat; a diamond pin (21) is provided on the positioning seat and the side of the centering spindle (20); a diamond pin guide head (19) is provided on the top of the diamond pin (21).

4. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 3, characterized in that, The centering mandrel (20) is provided with a centering guide head at the top; the centering mandrel (20) is provided with multiple chamfered surfaces evenly distributed around its circumference.

5. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 4, characterized in that, An air vent is provided at the center of the top surface (23) of the surface positioning column (13).

6. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 5, characterized in that, The angle range of the inclined plate is 15-35 degrees.

7. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 4, characterized in that, Two lifting bolts (3) are respectively installed on the front and rear sides of the base plate (5).

8. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 7, characterized in that, The bottom surface of the base plate (5) is symmetrically provided with quick-change positioning sleeves (8) on the left and right sides. Two base plate positioning pins (2) can be detachably installed on the rear side of the bottom surface of the base plate (5).

9. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 8, characterized in that, The upper surface of the base plate (5) is provided with middle mounting holes (10) on the left and right sides respectively; The base plate (5) has coarse guide holes (6) on its upper surface and the side of the middle mounting hole (10); the two coarse guide holes (6) are set diagonally.

10. The hydraulic fixture for a vertical machining center with a hydraulic housing according to claim 4, characterized in that, Both the centering guide head and the diamond-shaped guide head (19) are made of copper.

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