Hydraulic clamp device of turn-milling machining center

Abstract

The utility model discloses a hydraulic clamp device of a turn-milling machining center, which comprises a clamp body and a tailstock tip mounted on a machining center tailstock, a clamp tip coaxial with the tailstock tip is mounted on the clamp body, the bottom of the clamp body is fixed on a base, and a first rotating cylinder and a second rotating cylinder are mounted on the base. The first rotating cylinder and the second rotating cylinder are located on the two sides of the clamp tip, the first rotating cylinder drives the first pressing plate to rotate in the horizontal plane, the second rotating cylinder drives the second pressing plate to rotate in the horizontal plane, an energy accumulator, a supporting cylinder, a V-shaped support and an adjusting support are installed on the base, and the supporting cylinder and the adjusting support are arranged on the two sides of a part respectively. A V-shaped supporting part is installed, a hydraulic source is arranged, and a pressure retaining valve, an energy accumulator, a sequence valve, a supporting cylinder, a first rotating cylinder and a second rotating cylinder are communicated through an oil way, so that the problems that rapid clamping and positioning cannot be conducted and clamping force cannot be kept for a long time during aircraft landing gear part machining are solved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic clamping technology, and more specifically, to a hydraulic clamping device for a turning and milling machining center. Background Technology

[0002] As aircraft landing gear structural components become increasingly complex in shape, the requirements for machining accuracy are also increasing. Turning and milling machining centers combine the functions of vertical and horizontal machining centers, and can complete the machining of parts in one go while ensuring both accuracy and efficiency. They are an ideal choice, especially for machining the shape of long cylindrical landing gear parts. The design challenge of existing landing gear fixtures lies in how to quickly position the parts and maintain clamping force for a long time. Utility Model Content

[0003] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a hydraulic clamping device for milling and turning machining centers, which solves the problem of not being able to quickly clamp and position and maintain clamping force for a long time when machining long cylindrical parts of aircraft landing gear.

[0004] To achieve the above objectives, this utility model provides a hydraulic clamping device for a milling and turning machining center, including a clamping body clamped and positioned by a chuck, and a tailstock tip mounted on the tailstock of the machining center. A clamping tip coaxial with the tailstock tip is mounted on the clamping body. The bottom of the clamping body is fixed to a base, on which a first rotary cylinder and a second rotary cylinder are mounted. The first and second rotary cylinders are located on opposite sides of the clamping tip. The first rotary cylinder drives a first pressure plate to rotate in a horizontal plane, and the second rotary cylinder drives a second pressure plate to rotate in a horizontal plane. An accumulator, a support cylinder, a V-shaped support, an adjusting support, and a pressure-holding valve are mounted on the base. The support cylinder and the adjusting support are respectively located on opposite sides of the workpiece. The support cylinder is located below the second pressure plate, and the adjusting support is located below the first pressure plate. The V-shaped support supports the workpiece during mounting. A hydraulic source is provided and connected to the pressure-holding valve, the support cylinder, the first rotary cylinder, and the second rotary cylinder via an oil circuit.

[0005] The working principle of this fixture device is as follows: the part is hoisted onto the V-shaped support, and the part is pushed to the position of the fixture tip by the tailstock center of the machine tool to complete the axial positioning of the part. Then, the circumferential rotation of the part is restricted by adjusting the support of the fixture. The first rotary cylinder is opened to press one side of the Y-shaped part of the part. Then, the piston rod of the support cylinder contacts the part and locks it. Next, the other side of the Y-shaped part of the part is pressed by the second rotary cylinder to complete the positioning and clamping of the part. The hydraulic power switch is placed in the neutral position and the quick connector is disconnected. Finally, the part is processed.

[0006] Furthermore, a first steel ball bolt support is fixedly provided at the end of the first pressure plate, and a second steel ball bolt support is fixedly provided at the end of the second pressure plate. The part includes an upper inclined surface and a lower inclined surface at the head. The first steel ball bolt support and the second steel ball bolt support press against the upper inclined surface, and the adjusting support and the support cylinder press against the lower inclined surface. Since both the upper and lower surfaces of the Y-shaped part of the part are inclined, by setting steel ball bolt supports on the pressure plate, the support direction can be adjusted to match the inclined surface, thereby achieving a better fastening effect.

[0007] Furthermore, the clamp body has a clamp positioning hole at its center for positioning and installing the clamp body onto the chuck, facilitating quick and easy alignment and installation of the clamp body.

[0008] Furthermore, the fixture positioning hole is a countersunk hole, and a through-hole is provided in the center of the fixture positioning hole. The fixture tip is installed in the tip positioning hole from the front of the fixture body. The fixture tip includes a positioning cylinder, which is inserted into the tip positioning hole for positioning, so that the fixture tip can be quickly installed in place.

[0009] Furthermore, the back of the clamp body is prefabricated with three through slots, which are evenly distributed around the circumference of the clamp positioning hole. The chuck jaws clamp the clamp body through the through slots.

[0010] Furthermore, a compression spring is pre-installed between the bottom of the V-shaped support and the base, so that the V-shaped support can retract under force when the hoisted parts are placed, thus providing a buffer during the parts installation process.

[0011] Furthermore, the V-shaped support surface is pre-fitted with soft material pads to prevent damage to the surface of the parts.

[0012] Furthermore, an accumulator, a hydraulic gauge, and a sequence valve are installed on the base. The hydraulic source is connected to the accumulator and the sequence valve through an oil circuit. The hydraulic gauge monitors the actual pressure of the oil circuit to compensate for or absorb pressure fluctuations in the clamp oil circuit caused by temperature changes after disconnection from the hydraulic source, and to adjust the state of different cylinders.

[0013] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0014] (1) This utility model provides a hydraulic clamping device for a turning and milling machining center. By setting a first rotary cylinder and a second rotary cylinder, the first pressure plate and the second pressure plate are driven respectively. A first steel ball bolt support and a second steel ball bolt support are set at the ends of the two pressure plates respectively, so as to adapt to the upper inclined plane of the head of the long cylindrical part. The support cylinder and the adjustment support are used to clamp and fix it on the corresponding lower inclined plane, thereby realizing the clamping and restriction of the circumferential rotation direction of the long cylindrical part of the aircraft landing gear.

[0015] (2) This utility model provides a hydraulic clamping device for a turning and milling machining center. The clamping force generated by the hydraulic cylinder can be adjusted by controlling the pressure of the hydraulic source to ensure that a suitable clamping force is obtained, so as to reduce the clamping deformation of the parts. Attached Figure Description

[0016] Figure 1 This is an isometric view of the clamping part according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the specific structure of the device in the embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the clamp tip in an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of the part positioning component in an embodiment of this utility model;

[0021] Figure 6 This is a hydraulic schematic diagram of an embodiment of the present invention.

[0022] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Clamp body; 2. First rotary cylinder; 3. Second rotary cylinder; 4. Accumulator; 5. Support cylinder; 6. V-shaped support; 7. Hydraulic gauge; 8. Clamp center; 9. Adjustment support; 10. Sequence valve; 11. Pressure holding valve; 12. Hydraulic source; 13. Counterweight plate; 14. Chuck; 15. Through slot; 16. Clamp positioning hole; 17. Center positioning hole; 18. Tailstock; 181. Tailstock center; 19. Base; 20. Part positioning component; 21. First pressure plate; 22. First steel ball bolt support; 31. Second pressure plate; 32. Second steel ball bolt support; 61. Compression spring; 81. Positioning cylinder; 201. Center hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present 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 only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figures 1-5 As shown, this embodiment provides a hydraulic clamping device for a milling and turning machining center, including a steel clamping body 1. The clamping body 1 is fixed on a base 19. Here, the side of the clamping body 1 facing the chuck 14 is defined as the back, and the side facing away from the chuck 14 is defined as the front. One end near the chuck 14 is the head of the workpiece to be machined, and the other end is the tail. A counterweight plate 13 is fixed to the upper part of the back of the clamping body 1 by bolts. Three through slots 15 are pre-made on the back of the clamping body 1. A clamping positioning hole 16 is provided in the center of the clamping body 1. The clamping positioning hole 16 is a countersunk hole used to position and install the clamping body 1 onto the chuck 14. The three through slots 15 are evenly distributed around the circumference of the clamping positioning hole 16. The jaws of the chuck 14 clamp the clamping body 1 by extending into the through slots 15. Furthermore, a through-hole center positioning hole 17 is provided in the center of the clamping positioning hole 16 for inserting and positioning the clamping tip 8 from the front of the clamping body 1. The front of the clamping body 1 is provided with bolt holes for fixing the clamping tip 8.

[0025] Furthermore, the fixture tip 8 includes a positioning cylinder 81. By inserting the positioning cylinder 81 into the tip positioning hole 17 for rapid positioning, the chuck 14 clamps the fixture body 1, ensuring that the fixture tip 8 is coaxial with the machine tool chuck 14. Furthermore, the fixture device is provided with a tailstock tip 181 on the machining center tailstock 18 corresponding to the tail of the part. The tailstock tip 181 pushes the part to move on the V-shaped support 6 until the fixture body 1 fixes the head of the part.

[0026] Furthermore, such as Figure 1As shown, a first rotating cylinder 2 and a second rotating cylinder 3 are respectively installed on the base 19 on both sides of the clamp tip 8. The rotating shafts of the two cylinders drive the first pressure plate 21 and the second pressure plate 31 to rotate in the horizontal plane toward the axis of the clamp tip 8. A first steel ball bolt support 22 is fixedly provided at the end of the first pressure plate 21, and a second steel ball bolt support 32 is fixedly provided at the end of the second pressure plate 31. Further, the head of the landing gear long cylinder part is Y-shaped, and the tail is a cylindrical part. The Y-shaped part has an upper inclined surface and a lower inclined surface. After the first rotating cylinder 2 and the second rotating cylinder 3 drive the first pressure plate 21 and the second pressure plate 31 to rotate 90° toward the central axis of the tip 181, the angles of the first steel ball bolt support 22 and the second steel ball bolt support 32 are adjusted to adapt to the upper inclined surface and press the Y-shaped part of the part. Furthermore, a cavity is provided on the central axis of the Y-shaped part of the part head, and a part positioning component 20 is installed in the cavity. The part positioning component 20 is cylindrical, and a center hole 201 is provided along the axis at its center. The fixture center 8 is coaxially engaged with the center hole 201, and together with the tailstock center 181, it completes the axial positioning of the part.

[0027] Preferably, the first pressure plate 21 and the second pressure plate 31 are specially designed according to the shape of the part being processed, so as to adapt to the shape characteristics of the part, and can be designed and replaced according to different part shapes.

[0028] Furthermore, a support cylinder 5, a V-shaped support 6, and an adjusting support 9 are also installed on the base 19. The support cylinder 5 and the adjusting support 9 are respectively located on both sides of the part. The support cylinder 5 is located below the second pressure plate 31, and the adjusting support 9 is located below the first pressure plate 21. When the first steel ball bolt support 22 and the second steel ball bolt support 32 press against the upper inclined surface, the adjusting support 9 is located below the first steel ball bolt support 22, and the support cylinder 5 is located below the second steel ball bolt support 32. The adjusting support 9 adopts a steel ball bolt structure, and its support surface can rotate at the center of the steel ball to adapt to the lower inclined surface of the part. The support cylinder 5 is controlled by hydraulic pressure to lock its piston rod after contacting the lower inclined surface. The first steel ball bolt support 22, the second steel ball bolt support 32, the support cylinder 5, and the adjusting support 9 work together to restrict the Y-shaped part of the part after the part is adjusted by circumferential rotation.

[0029] Furthermore, the V-shaped support 6 can slide down the base 19 a certain distance. A compression spring 61 is preset between the bottom of the V-shaped support 6 and the base 19. The V-shaped opening of the V-shaped support 6 restricts the axis of the cylindrical part of the part to be coaxial with the clamp tip 8. The compression spring 61 provides a buffering effect when lifting the part.

[0030] Preferably, a soft material pad is pre-installed on the surface of the V-shaped support 6 to prevent damage to the parts.

[0031] Furthermore, the base 19 is also equipped with an accumulator 4, a hydraulic gauge 7, a sequence valve 10, and a pressure holding valve 11. The hydraulic source 12 is connected to the pressure holding valve 11, the accumulator 4, the hydraulic gauge 7, the sequence valve 10, the support cylinder 5, the first rotating cylinder 2, and the second rotating cylinder 3 via an oil circuit. The sequence valve 10 controls the supporting action of the piston rod of the support cylinder 5. After the piston rod is locked, the sequence valve 10 controls the second pressure plate 31 to press the parts. The accumulator 4 is located between the support cylinder 5 and the adjusting support 9 to compensate for or absorb pressure fluctuations in the clamp's oil circuit caused by temperature changes after disconnection from the hydraulic source 12. The pressure holding valve 11 ensures that the clamp can maintain the clamping force for a long time after disconnection from the hydraulic source. The hydraulic gauge 7 can confirm the actual pressure value.

[0032] Furthermore, a method for clamping parts using a hydraulic fixture device of a milling and turning machining center is provided. First, the part positioning component 20 is fixed in the cavity of the part head. The product part is hoisted onto the pre-installed V-shaped support 6. Then, the part is pushed to the position of the fixture tip 8 by the tailstock tip 181 of the machine tool until the fixture tip 8 is inserted into the tip hole 201, completing the axial positioning of the part. Then, the circumferential rotation of the part is restricted by the fixture adjustment support 9. The first rotary cylinder 2 is opened to press one side of the Y-shaped part of the part. Then, the piston rod of the support cylinder 5 is controlled by the sequence valve 10 to contact the part and lock it. Next, the second rotary cylinder 3 is controlled by the sequence valve 10 to press the other side of the Y-shaped part of the part to complete the part positioning and clamping. The hydraulic power source 12 switch is placed in the neutral position and the quick-connect connector is disconnected. Specifically, when the hydraulic power source 12 switch is placed in the neutral position, the oil pipe connection is disconnected. Since the fixture uses a leak-free quick-connect connector and a pressure holding valve 11, the pressure in the fixture clamping system is still maintained at this time and there will be no leakage. The pressure holding time is sufficient to complete the product processing. The part processing only begins when the switch is placed in the neutral position.

[0033] Furthermore, combined Figure 6 The hydraulic principle of this fixture is explained as follows: Connect the air supply port PA of the hydraulic power source 12 to an external power source. Adjust the control switch on the hydraulic power source (AB pump shown in the diagram) to the A oil port position. Pressure is supplied to the first rotary cylinder 2 through the pressure holding valve 11, accumulator 4, and hydraulic gauge 7. A throttle valve is installed in the oil circuit before the first rotary cylinder 2 to adjust the speed of its movement. The support cylinder 5 is controlled by the sequence valve 10, and the second rotary cylinder 3 is also controlled by the sequence valve 10. The fixture completes the clamping action. At this time, disconnect the quick-connect oil pipe on the pressure holding valve 11. The fixture body 1 is in a closed state, and the first and second rotary cylinders 2 and 3 remain in a clamped state. Therefore, both cylinders are in a long-term clamped state, achieving pressure holding for part processing. Adjusting the control switch on the hydraulic power source 12 to the B oil port position causes the fixture pressure to be lost, and the hydraulic oil returns to the hydraulic power source 12. When disconnecting or inserting the quick-connect connector at the air supply port PA, the hydraulic power source 12 control switch must be set to the neutral position to cut off the oil pressure before continuing operation.

[0034] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic clamping device for a milling and turning machining center, comprising a clamping body (1) clamped and positioned by a chuck (14), and a tailstock center (181) mounted on a tailstock (18) of the machining center, wherein a clamping center (8) coaxial with the tailstock center (181) is mounted on the clamping body (1), characterized in that, The bottom of the clamping body (1) is fixed on the base (19). The base (19) is equipped with a first rotating cylinder (2) and a second rotating cylinder (3). The first rotating cylinder (2) and the second rotating cylinder (3) are located on both sides of the clamping tip (8). The first rotating cylinder (2) drives the first pressure plate (21) to rotate in the horizontal plane, and the second rotating cylinder (3) drives the second pressure plate (31) to rotate in the horizontal plane. The base (19) is equipped with an accumulator (4), a support cylinder (5), a V-shaped support (6), an adjusting support (9), and a pressure holding valve (11). The support cylinder (5) and the adjusting support (9) are respectively located on both sides of the part. The support cylinder (5) is located below the second pressure plate (31), and the adjusting support (9) is located below the first pressure plate (21). The V-shaped support (6) supports the installation of the part. A hydraulic source (12) is provided and connected to the pressure holding valve (11), the support cylinder (5), the first rotating cylinder (2), and the second rotating cylinder (3) through an oil circuit.

2. The hydraulic clamping device for a turning and milling machining center according to claim 1, characterized in that, The first pressure plate (21) is fixedly provided with a first steel ball bolt support (22) at its end, and the second pressure plate (31) is fixedly provided with a second steel ball bolt support (32) at its end.

3. The hydraulic clamping device for a turning and milling machining center according to claim 2, characterized in that, The part includes a head with an upper inclined surface and a lower inclined surface, the first steel ball bolt support (22) and the second steel ball bolt support (32) pressing the upper inclined surface, and the adjusting support (9) and the support cylinder (5) pressing the lower inclined surface.

4. The hydraulic clamping device for a turning and milling machining center according to claim 1, characterized in that, The clamp body (1) is provided with a clamp positioning hole (16) at the center, which is used to position and install the clamp body (1) onto the chuck (14).

5. A hydraulic clamping device for a turning and milling machining center according to claim 4, characterized in that, The fixture positioning hole (16) is a countersunk hole, and the center of the fixture positioning hole (16) is provided with a through-hole center positioning hole (17). The fixture center (8) is installed from the front of the fixture body (1) into the center positioning hole (17).

6. A hydraulic clamping device for a turning and milling machining center according to claim 4, characterized in that, The back of the clamp body (1) has three through grooves (15) pre-made. The three through grooves (15) are evenly distributed around the circumference of the clamp positioning hole (16). The jaws of the chuck (14) clamp the clamp body (1) through the through grooves (15).

7. A hydraulic clamping device for a turning and milling machining center according to claim 5, characterized in that, The clamp tip (8) includes a positioning cylinder (81), which is inserted into the tip positioning hole (17) for positioning.

8. A hydraulic clamping device for a turning and milling machining center according to claim 1, characterized in that, A compression spring (61) is pre-installed between the bottom of the V-shaped support (6) and the base (19).

9. A hydraulic clamping device for a turning and milling machining center according to claim 1, characterized in that, The surface of the V-shaped support (6) is pre-set with soft material pads.

10. A hydraulic clamping device for a turning and milling machining center according to claim 1, characterized in that, An accumulator (4), a hydraulic gauge (7), and a sequence valve (10) are installed on the base (19). The hydraulic source (12) is connected to the accumulator (4) and the sequence valve (10) through an oil circuit. The hydraulic gauge (7) monitors the actual pressure of the oil circuit.

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