Hydraulic tool clamp for shaft seat

Abstract

The utility model provides a shaft seat hydraulic tool clamp which comprises a base body base, a quick-inserting pressure maintaining unit, a hydraulic pressure gauge, an energy accumulator, a sequence valve, a pressure regulating valve, a hydraulic pressing block, a hydraulic liquid expansion mandrel, a pressing rod assembly, a rhombic positioning pin, a clamp body and a cylindrical pin, the base body base is of a cuboid structure, and the energy accumulator, the hydraulic pressure gauge and the quick-inserting pressure maintaining unit are fixed to the surface of the base body base through screws; meanwhile, a counterbore connected with a machine tool is formed; a rectangular groove is formed in the middle of the pressing rod assembly, and a cylindrical pin is arranged on the pressing rod assembly and used for limiting the pressing rod assembly; the clamp body is a box body, the installation height of a shaft seat part is increased, machining is facilitated, a machine tool spindle is prevented from colliding with a tool, and meanwhile the middle cavity can be used for arranging a sequence valve and a pressure regulating valve. A hydraulic liquid expansion mandrel and a rhombic positioning pin are fixed on the upper surface of the clamp body through screws.

Description

Technical Field

[0001] This patent belongs to the category of tooling fixtures, specifically relating to a hydraulic tooling fixture for a shaft seat. Background Technology

[0002] The bearing housing is a crucial component of the helicopter's landing gear. It connects to the shock absorber, anti-torsion arm, and wheel axle, playing a vital role in the landing gear system for connection and load-bearing. It is a complex forged part with numerous assembly relationships and high dimensional accuracy requirements.

[0003] The challenges in machining the bearing seat component: The blank material for this bearing seat component is 2A14-T6(Dm), which is composed of multiple assembly holes and fork lugs. It requires high dimensional accuracy, surface quality, and spatial form and position tolerances. Its hole diameter is Φ53 (+0.03 / 0), and its perpendicularity tolerance is Φ0.02. The bearing seat component is highly susceptible to clamping deformation during machining, resulting in dimensional deviations after machining. Improving clamping efficiency and ensuring the product's quality stability are urgent technical challenges that need to be addressed. Summary of the Invention

[0004] This application provides a hydraulic tooling fixture for shaft seats, which can solve the problem of low clamping efficiency during parts processing.

[0005] Technical solution: A hydraulic tooling fixture for a shaft seat, comprising a base 1, a quick-release pressure holding unit 2, a hydraulic gauge 3, an accumulator 4, a sequence valve 5, a pressure regulating valve 6, a hydraulic pressure block 7, a hydraulic expansion mandrel 8, a pressure rod assembly 9, a diamond-shaped locating pin 10, a fixture body 11, and a cylindrical pin 12, wherein:

[0006] The base 1 adopts a cuboid structure, and the accumulator 4, hydraulic gauge 3, and quick-connect pressure holding unit 2 are fixed on the surface by screws. At the same time, countersunk holes for connection with the machine tool are provided.

[0007] The pressing block 7 is a cylinder with a rectangular groove in the middle through which the pressing rod assembly 9 passes. It has a cylindrical pin 12 on it for limiting the pressing rod assembly 9.

[0008] The fixture body 11 is a box-shaped structure that raises the height of the shaft seat parts for easier processing and prevents collisions between the machine tool spindle and the tooling. The intermediate cavity can also be used to arrange the sequence valve 5 and the pressure regulating valve 6. The upper surface of the fixture body 11 is fixed with screws to the hydraulic expansion mandrel 8 and the diamond-shaped locating pin 10.

[0009] The base 1 is connected to the clamping body 11 by screws. The clamping body 11 is provided with a pressure rod assembly 9. The pressure rod assembly 9 is provided with a hydraulic pressure block 7, a hydraulic expansion mandrel 8 and a diamond-shaped positioning pin 10. The hydraulic pressure block 7 is connected to the pressure rod assembly 9. The hydraulic expansion mandrel 8 passes through the positioning hole of the bearing part, and the diamond-shaped positioning pin 10 is located in the corner hole. After pressurization, the hydraulic expansion mandrel 8 first tightens the bearing part, and then the pressure rod assembly 9 drives the hydraulic pressure block 7 to press the bearing part, thereby realizing the clamping of the bearing part.

[0010] Specifically, in the hydraulic tooling fixture for the shaft seat, hydraulic gauge 3 monitors the system pressure value.

[0011] Specifically, the accumulator 4 in the shaft seat hydraulic tooling fixture compensates for leakage in the hydraulic system to maintain stable system pressure.

[0012] Specifically, in the hydraulic tooling fixture, the sequence valve 5 controls the action sequence of the hydraulic expansion mandrel 8 and the pressure rod assembly 9, ensuring that the hydraulic expansion mandrel expands and tightens the parts first, and then the pressure rod assembly pulls down to fix the hydraulic pressure block 7.

[0013] Specifically, the pressure regulating valve 6 in the shaft seat hydraulic tooling fixture is connected to the external hydraulic pipeline to reduce the inlet pressure to the required outlet pressure.

[0014] Specifically, the hydraulic expansion mandrel 8 in the shaft seat hydraulic tooling fixture realizes the functions of contraction and expansion, thereby fixing the shaft seat parts.

[0015] Specifically, in the hydraulic tooling fixture for the shaft seat, the pressure rod assembly 9, under the action of hydraulic pressure, pulls the rod downward, causing the pressure cover to press down, thereby achieving the function of pressing the hydraulic pressure block 7.

[0016] Specifically, the diamond-shaped locating pin 10 in the hydraulic tooling fixture for the shaft seat is confined within the Φ32 hole of the shaft seat, thereby achieving angular positioning and auxiliary support.

[0017] In summary, the present invention provides a hydraulic tooling fixture for a shaft seat, which adopts a positioning method of two pins on one side. After positioning, the pressure block can automatically clamp, which greatly reduces the operator's operation steps, improves the part clamping efficiency, better controls the clamping force, and reduces the deformation of the part during clamping. Attached Figure Description

[0018] Figure 1 A schematic diagram of a bearing seat part provided in this application;

[0019] Figure 2 A schematic diagram of a hydraulic tooling fixture for a shaft seat provided in this application;

[0020] Figure 3 A schematic diagram of a hydraulic tooling fixture for a shaft seat provided in this application;

[0021] Figure 4 A hydraulic schematic diagram of a shaft seat hydraulic tooling fixture provided in this application;

[0022] The components are: 1-base, 2-quick-connect pressure holding unit, 3-hydraulic gauge, 4-accumulator, 5-sequence valve, 6-pressure regulating valve, 7-hydraulic pressure block, 8-hydraulic expansion mandrel, 9-pressure rod assembly, 10-diamond positioning pin, 11-clamp body, 12-cylindrical pin. Detailed Implementation

[0023] This invention proposes a practical, effective, and fast hydraulic tooling fixture for shaft seats to control the deformation of parts during the clamping process of CNC machining and finishing, ensure the accuracy of dimensions and positional requirements, and improve the clamping efficiency and stability of the parts.

[0024] The technical solution of this invention is as follows: This fixture adopts a hydraulic design, with a maximum hydraulic design pressure of 100 bar and an operating pressure of 50-70 bar. One hole Φ53 and surface of the bearing part are used as a positioning reference, and another hole Φ32 is used for angular positioning. The positioning hole Φ53 and the angular hole Φ32 are positioned using a hydraulic expansion mandrel and a diamond-shaped positioning pin. The bearing part is placed on the fixture, the hydraulic power source is connected, the hydraulic mandrel first tensions the part, pulls down the hydraulic cylinder, and presses the bearing; after the bearing is machined, the hydraulic lines are depressurized, and the bearing part can be removed.

[0025] like Figure 1 As shown, the bearing part is composed of multiple assembly holes and fork lugs. It has high requirements for dimensional accuracy, surface quality and spatial form and position tolerance. Its hole diameter Φ53 is the positioning hole of the hydraulic tooling, and the Φ32 hole at the position of the fork lug is the angular hole for positioning of the hydraulic tooling.

[0026] Example 1

[0027] like Figure 2-4 As shown, this application provides a hydraulic tooling fixture for a shaft seat, including a base 1, a quick-release pressure holding unit 2, a hydraulic gauge 3, an accumulator 4, a sequence valve 5, a pressure regulating valve 6, a hydraulic pressure block 7, a hydraulic expansion mandrel 8, a pressure rod assembly 9, a diamond-shaped locating pin 10, a fixture body 11, and a cylindrical pin 12, wherein:

[0028] The base 1 adopts a cuboid structure, and the accumulator 4, hydraulic gauge 3, and quick-connect pressure holding unit 2 are fixed on the surface by screws. At the same time, countersunk holes for connection with the machine tool are provided.

[0029] The pressure block 7 is a cylinder with a diameter of Φ80. It has a rectangular groove in the middle through which the pressure rod assembly 9 passes. There is a cylindrical pin 12 on it, which is used to limit the pressure rod assembly 9.

[0030] The fixture body 11 is a box with a height of 140mm, which raises the installation height of the shaft seat parts, making it easier to process and preventing the machine tool spindle from colliding with the tooling. At the same time, the intermediate cavity can be used to arrange the sequence valve 5 and the pressure regulating valve 6. The upper surface of the fixture body 11 is fixed with screws to the hydraulic expansion mandrel 8 and the diamond-shaped locating pin 10.

[0031] The base 1 is connected to the clamping body 11 by screws. The clamping body 11 is equipped with a pressure rod assembly 9. The pressure rod assembly 9 is equipped with a hydraulic pressure block 7, a hydraulic expansion mandrel 8 and a diamond-shaped positioning pin 10. The hydraulic pressure block 7 is connected to the pressure rod assembly 9. The hydraulic expansion mandrel 8 passes through the positioning hole Φ53 of the bearing part. The diamond-shaped positioning pin 10 is located in the angular hole Φ32. After pressurization, the hydraulic expansion mandrel 8 first tightens the bearing part, and then the pressure rod assembly 9 drives the hydraulic pressure block 7 to press the bearing part, thereby realizing the clamping of the bearing part.

[0032] Furthermore, the hydraulic gauge 3 in the shaft bearing hydraulic tooling fixture monitors the system pressure value.

[0033] Furthermore, the accumulator 4 in the hydraulic tooling fixture of the shaft seat compensates for leakage in the hydraulic system to maintain stable system pressure.

[0034] Furthermore, in the hydraulic tooling fixture, the sequence valve 5 controls the action sequence of the hydraulic expansion mandrel 8 and the pressure rod assembly 9, ensuring that the hydraulic expansion mandrel expands and tightens the parts first, and then the pressure rod assembly pulls down to fix the hydraulic pressure block 7.

[0035] Furthermore, the pressure regulating valve 6 in the shaft seat hydraulic tooling fixture is connected to the external hydraulic pipeline to reduce the inlet pressure to the required outlet pressure.

[0036] Furthermore, the hydraulic expansion mandrel 8 in the shaft seat hydraulic tooling fixture can realize the functions of contraction and expansion, thereby fixing the shaft seat parts.

[0037] Furthermore, in the hydraulic tooling fixture for the shaft seat, the pressure rod assembly 9, under the action of hydraulic pressure, pulls the rod downward, causing the pressure cover to press down, thereby realizing the function of pressing the hydraulic pressure block 7.

[0038] Furthermore, the diamond-shaped locating pin 10 in the hydraulic tooling fixture for the shaft seat is confined within the Φ32 hole of the shaft seat, thereby achieving angular positioning and also providing auxiliary support.

[0039] In summary, the present invention provides a hydraulic tooling fixture for a shaft seat, the positive effects of which are:

[0040] 1. Reliable clamping: Controlling the clamping force makes the deformation of the parts more stable during clamping, ensuring the behavioral tolerance of the parts after machining.

[0041] 2. After positioning, the clamping block can automatically clamp, greatly reducing the operator's operation steps and improving the efficiency of parts clamping.

[0042] 3. Precise positioning ensures a smooth machining process. Quantified indicators guarantee the stability of part quality.

[0043] Example 2

[0044] like Figure 2-3 As shown, this application provides an operation method for a hydraulic tooling fixture for a shaft seat, including:

[0045] Step 1: Install the hydraulic fixture for the shaft seat on the machining platform of the horizontal five-axis CNC machine tool.

[0046] Step 2: With the hydraulic fixture in a de-hydraulic state, place the shaft seat part on the jig, ensuring that the bottom surface of the shaft seat part is tightly fitted with the fixture mounting surface. The hydraulic expansion mandrel 8 passes through the Φ53 hole. The diamond-shaped locating pin 10 engages with the Φ32 hole in the shaft seat part to achieve angular positioning of the part. Finally, place the hydraulic pressure block 7 on top and rotate it 90°.

[0047] Step 3: Connect the hydraulic power source and observe the hydraulic pressure gauge 3 to reach 55 Bar. Control the clamping force by adjusting the sequence valve 5 and the regulating valve 6. The accumulator 4 maintains stable pressure. The hydraulic expansion mandrel 8 first tightens the shaft seat parts, and the pressure rod assembly 9 drives the hydraulic pressure block 7 to press the shaft seat parts.

[0048] Step 4: Begin machining the bearing seat part. After machining, depressurize the hydraulic lines, and the hydraulic expansion mandrel 8 will loosen the bearing seat part. The pressure rod assembly 9 will then drive the hydraulic pressure block 7 to loosen the bearing seat part. Remove the bearing seat part.

[0049] In summary, the present invention provides a hydraulic tooling fixture for a shaft seat, which adopts a positioning method of two pins on one side. After positioning, the hydraulic pressure block can automatically clamp, which greatly reduces the operator's operation steps, improves the part clamping efficiency, better controls the clamping force, and reduces the deformation of the part during clamping.

Claims

1. A hydraulic tooling fixture for a shaft seat, characterized in that, Includes a base (1), a quick-connect pressure holding unit (2), a hydraulic gauge (3), an accumulator (4), a sequence valve (5), a pressure regulating valve (6), a hydraulic pressure block (7), a hydraulic expansion mandrel (8), a pressure rod assembly (9), a diamond-shaped locating pin (10), a clamping body (11), and a cylindrical pin (12), wherein: The base (1) adopts a cuboid structure, and the surface is fixed with screws to the accumulator (4), hydraulic gauge (3), quick-connect pressure holding unit (2), and countersunk hole for connection with machine tool; The pressure block (7) is a cylinder with a rectangular groove in the middle through the pressure rod assembly (9), and a cylindrical pin (12) on it for limiting the pressure rod assembly (9); The fixture body (11) is a box-shaped structure that raises the height of the shaft seat parts for easy processing and prevents the machine tool spindle from colliding with the tooling. Meanwhile, the intermediate cavity can be used to arrange the sequence valve (5) and the pressure regulating valve (6). The upper surface of the fixture body (11) is fixed with screws to the hydraulic expansion mandrel (8) and the diamond-shaped locating pin (10). The base (1) is connected to the clamping body (11) by screws. The clamping body (11) is equipped with a pressure rod assembly (9). The pressure rod assembly (9) is equipped with a hydraulic pressure block (7), a hydraulic expansion mandrel (8) and a diamond-shaped positioning pin (10). The hydraulic pressure block (7) is connected to the pressure rod assembly (9). The hydraulic expansion mandrel (8) passes through the positioning hole of the bearing part. The diamond-shaped positioning pin (10) is located in the angular hole. After pressurization, the hydraulic expansion mandrel (8) first tightens the bearing part, and then the pressure rod assembly (9) drives the hydraulic pressure block (7) to press the bearing part, thereby realizing the clamping of the bearing part.

2. The hydraulic tooling fixture for the shaft seat according to claim 1, characterized in that, The hydraulic gauge (3) in the shaft seat hydraulic tooling fixture monitors the system pressure value.

3. The hydraulic tooling fixture for the shaft seat according to claim 1, characterized in that, The accumulator (4) in the hydraulic tooling fixture of the shaft seat compensates for leakage in the hydraulic system to maintain stable system pressure.

4. The hydraulic tooling fixture for the bearing seat according to claim 1, characterized in that, In the hydraulic tooling fixture, the sequence valve (5) controls the action sequence of the hydraulic expansion mandrel (8) and the pressure rod assembly (9) actuators. First, the hydraulic expansion mandrel expands and tightens the parts, and then the pressure rod assembly pulls down to fix the hydraulic pressure block (7).

5. The hydraulic tooling fixture for the shaft seat according to claim 1, characterized in that, The pressure regulating valve (6) in the hydraulic tooling fixture is connected to the external hydraulic pipeline to reduce the inlet pressure to the required outlet pressure.

6. The hydraulic tooling fixture for the shaft seat according to claim 1, characterized in that, The hydraulic expansion mandrel (8) in the hydraulic tooling fixture of the bearing seat realizes the functions of contraction and expansion, thereby fixing the bearing seat parts.

7. The hydraulic tooling fixture for the shaft seat according to claim 1, characterized in that, In the hydraulic tooling fixture for the shaft seat, the pressure rod assembly (9) is pressed down by the hydraulic pressure, which in turn presses down the pressure cover, thus achieving the function of pressing the hydraulic pressure block (7).

8. The hydraulic tooling fixture for the shaft seat according to claim 1, characterized in that, The diamond-shaped locating pin (10) in the hydraulic tooling fixture for the shaft seat is confined within the Φ32 hole of the shaft seat, thereby achieving angular positioning and auxiliary support.

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