Clamping device for large-opening thin-wall nickel-copper alloy complete product

Abstract

The utility model relates to the field of mechanical product processing, in particular to a clamping device for a large-opening thin-wall nickel-copper alloy complete set product, which comprises a base and a clamping component, a plurality of arch-shaped bosses are uniformly distributed on the outer circle of the base, central screw holes are formed in the arch-shaped bosses, an annular first boss is arranged on the end face of one side of the base, and a second boss is arranged on the end face of the other side of the base. A plurality of middle screw holes are annularly and uniformly distributed in the top surface of the first boss; the clamping assembly comprises a screw rod and a pressing plate, and the front end of the screw rod sequentially penetrates through the arch-shaped boss and the pressing plate arranged on the end face of the product in a pressing mode and then is fastened through a nut. The clamp is suitable for clamping of the horizontal numerical control lathe, is extremely simple in structure and convenient to clamp, effectively improves machining precision, and can be suitable for machining large-opening thin-wall nickel-copper alloy complete products at the same time.

Description

Technical Field

[0001] The utility model discloses a clamping device for machining mechanical products, in particular to a clamping device for a complete set of large-mouth thin-wall nickel-copper alloy products. Background Art

[0002] The large-diameter, thin-walled nickel-copper alloy product set consists of a housing and three forged parts (pneumatic piston, piston ring, and retaining ring). It has large inner and outer diameters of approximately 1200-1600 mm, thin walls of 20-30 mm, runout ≤ 0.05, roundness ≤ 0.065, and a minimum dimensional tolerance of 0-0.036 mm. Due to the large diameter and thin walls, high precision is required. Furthermore, the material used is nickel-copper alloy, which is difficult to machine. Specifically:

[0003] Nickel-copper alloy material is an alloy with nickel as the main element and a certain amount of copper, iron, manganese and other elements. Its difficult processing performance is mainly reflected in the following aspects:

[0004] Work hardening: During machining, the material is prone to deformation and hardening, increasing the difficulty of machining. High viscosity: The chips produced during cutting have high viscosity and easily adhere to the tool, affecting machining quality and tool life. Poor thermal conductivity: The heat generated during machining is difficult to dissipate, which can easily cause the tool to overheat, affecting tool life and machining accuracy. High hardness requires the use of more wear-resistant tools and higher cutting parameters to ensure effective machining. Deformability: Deformation is prone to occur during machining, requiring appropriate machining processes and fixtures to ensure accuracy.

[0005] Large-diameter, thin-walled parts are typically processed on vertical lathes, as their vertical layout better withstands gravity and cutting forces, reduces deformation during machining, and helps ensure precision. However, our company primarily operates horizontal CNC lathes, with only one vertical lathe, which falls far short of our production schedule. To address this issue, we have designed and manufactured a complete set of large-diameter, thin-walled nickel-copper alloy clamping devices specifically for horizontal CNC lathes. Summary of the Invention

[0006] The purpose of the utility model is to solve the above technical problems and provide a clamping device suitable for horizontal CNC lathes, which has an extremely simple structure, is convenient for clamping, effectively improves the processing accuracy, and can be used for processing large-mouth thin-walled nickel-copper alloy complete products of shells and triple forgings.

[0007] The utility model includes a base and a clamping assembly, wherein the outer circle of the base is evenly distributed with a plurality of arch-shaped bosses, the arch-shaped bosses are provided with a central screw hole, one side end face of the base is provided with a first annular boss, and the top surface of the first boss is evenly distributed with a plurality of intermediate screw holes in an annular shape; the clamping assembly includes a screw and a pressure plate, the front end of the screw passes through the arch-shaped boss and the pressure plate pressed on the end face of the product in sequence and is fastened by a nut.

[0008] A second boss is further provided on the inner side of the first boss on one end face of the base, and a plurality of inner screw holes are evenly distributed in a circular pattern on the top face of the second boss, and a plurality of outer screw holes are evenly distributed in a circular pattern on the end face of the base outside the first boss.

[0009] The pressing plate is provided with a waist-shaped hole for the screw to pass through.

[0010] The clamping assembly further comprises a support block, which is located between the arch-shaped boss and the pressure plate.

[0011] The support block is located outside the screw rod between the arch-shaped boss and the pressing plate.

[0012] Beneficial effects:

[0013] The clamping device of this utility model is suitable for CNC horizontal lathe processing. The horizontal layout is conducive to the natural falling of chips. It is also suitable for clamping shells and triple forgings. It can directly clamp tooling, has low clamping difficulty, reduces workpiece deformation, improves workpiece processing accuracy, shortens processing time compared to vertical lathes, and significantly improves processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The front view of the base of the utility model.

[0015] Figure 2 It is a side view of the base of the utility model.

[0016] Figure 3 Schematic diagram of the shell structure.

[0017] Figure 4 This is a schematic diagram of the clamping shell of the utility model.

[0018] Figure 5 Schematic diagram of the structure of triple forgings.

[0019] Figure 6 This is the main view of the clamping triple forging of the utility model.

[0020] Figure 7 It is a side view of the clamping triple forging of the utility model.

[0021] Among them, 1-base, 1.1-arch-type boss, 1.1.1-center screw hole, 1.2-first boss, 1.3-second boss, 1.4-outer screw hole, 1.5-middle screw hole, 1.6-inner screw hole, 2-housing, 2.1-flange end inner hole, 2.2-flange inner end face, 2.3-inner hole boss end face, 3-support block, 4-screw, 5-pressure plate, 5.1-waist round hole, 6-nut, 7-triple forging, 7.1-piston ring, 7.2-pneumatic piston, 7.3-gear ring DETAILED DESCRIPTION

[0022] The present invention will be further explained below with reference to the accompanying drawings:

[0023] The utility model comprises a base 1 and a clamping assembly.

[0024] Among them, see Figure 1 and Figure 2 The outer circle of the base 1 is evenly distributed with multiple arch-shaped bosses 1.1, and the arch-shaped bosses 1.1 are opened with a central screw hole 1.1.1. One side end face of the base 1 has a first annular boss 1.2, and the top surface of the first boss 1.2 is evenly distributed with multiple intermediate screw holes 1.5; the inner side of the first boss 1.2 is also provided with a second boss 1.3, and the top surface of the second boss 1.3 is evenly distributed with multiple inner screw holes 1.6, and the end surface of the base 1 outside the first boss 1.2 is evenly distributed with multiple outer screw holes 1.4.

[0025] The clamping assembly comprises a screw 4, a pressure plate 5, and a support block 3. The front end of the screw 4 passes through the arch-shaped boss 1.1.1 and the pressure plate 5, which is press-fitted onto the end face of the product, and is then fastened with a nut 6. The pressure plate 5 has a waist-shaped hole 5.1 for the screw to pass through. The support block 3 is located outside the screw 4 between the arch-shaped boss 1.1 and the pressure plate 5.

[0026] Figure 3 is a schematic diagram of the shell structure, refer to Figure 4 When the inner hole of the shell 2 needs to be processed: the inner hole 2.1 of the flange end is embedded in the first boss 1.2 of the base 1, the screw 4 passes through the center screw hole 1.1.1 of the arch-shaped boss 1.1, passes through the waist hole 5.1 of the pressure plate 5, and the support block 3 is parallel to the screw 4. One end of the support block 3 supports the end face of the arch-shaped boss 1.1, and the other end of the support block 3 supports one side of the pressure plate 5. The other side of the pressure plate 5 is pressed on the inner end face 2.2 of the flange of the shell 2, and the nut 6 is passed through the screw 4 and tightened. This operation is performed on the remaining arch-shaped bosses 1.1 on the base 1. In this way, the shell 2 is fixed on the base 1 through the arch-shaped boss 1.1, support block 3, screw 4, pressure plate 5, and nut 6 on the base 1. Then, the horizontal lathe clamps the outer circle of the base 1 and semi-finishes and finishes the inner hole of the shell 2 to the process requirements.

[0027] When the outer circle of the shell 2 needs to be processed: the inner hole 2.1 of the flange end is embedded in the first boss 1.2 of the base 1, one end of the screw 4 is fixed on one of the middle screw holes 1.5, and the other end passes through the waist round hole 5.1 of the pressure plate 5. The support block 3 is parallel to the screw 4. One end of the support block 3 supports the end face of the arch-shaped boss 1.1, and the other end of the support block 3 supports one side of the pressure plate 5. The other side of the pressure plate 5 is pressed on the end face 2.3 of the inner hole boss of the shell 2. The nut 6 is passed through the screw 4 and tightened. This operation is performed on the remaining middle screw holes 1.5 of the base 1. In this way, the shell 2 is fixed on the base 1. Then, the horizontal lathe clamps the outer circle of the base 1 and semi-finishes and finishes the outer circle of the shell 2 to the process requirements.

[0028] Figure 5 This is a schematic diagram of the structure of the triple forging 7, which consists of a piston ring 7.1, a pneumatic piston 7.2, and a gear ring 7.3. Figure 6 and Figure 7 When it is necessary to process the inner circle, small end outer circle, and groove of the triple forging 7: the inner hole of one end of the piston ring 7.1 is embedded in the second boss 1.3, one end of the screw 4 is fixed on the outer screw hole 1.4, and the other end passes through the waist hole 5.1 of the pressure plate 5. The support block 3 is parallel to the screw 4. One end of the support block 3 supports the end face of the arch-shaped boss 1.1, and the other end of the support block 3 supports one side of the pressure plate 5. The other side of the pressure plate 5 presses on the flange end face 7.2.1 of the pneumatic piston 7.2. The nut 6 is passed through the screw 4 and tightened. This operation is performed on the remaining outer screw holes 1.4 of the base 1. The horizontal lathe clamps the outer circle of the base 1. First, the inner and outer circles of the retaining ring 7.3 are semi-finished and finished to the process requirements, and then the retaining ring 7.3 is cut off. Next, the inner circle, small end outer circle, and groove of the pneumatic piston 7.2 are semi-finished and finished to the process requirements.

[0029] When machining the outer diameter of the pneumatic piston 7.2, the base 1, along with the piston ring 7.1 and pneumatic piston 7.2, is unloaded from the CNC horizontal lathe. First, the eight screws 4, eight support blocks 3, pressure plate 5, and nut 6 fixed to the outer threaded holes 1.4 are removed from the base. One end of the screw 4 is then fixed to the inner threaded hole 1.6, and the other end passes through the waist hole 5.1 of the pressure plate 5. The support block 3 is parallel to the screw 4. One end of the support block 3 supports the end face of the base 1, and the other end of the support block 3 supports one side of the pressure plate 5. The other side of the pressure plate 5 presses on the inner hole end of the pneumatic piston 7.2, at 7.2.2. The nut 6 is passed through the screw 4 and tightened. This operation is repeated on the remaining inner threaded holes 1.6 of the base 1. After machining, the horizontal lathe is used to clamp the outer diameter of the base again and machine the outer diameter of the pneumatic piston 7.2 to the required size.

[0030] Remove base 1 along with piston ring 7.1 and pneumatic piston 7.2. Using a flat lathe, cut pneumatic piston 7.2 from base 1, leaving a 1mm margin on the end face. At this point, only piston ring 7.1 remains on base 1. Screw 4, pressure plate 5, and support block 3 press the inner end face of pneumatic piston 7.2 from the outside, then semi-finish and finish turn the inner bore of pneumatic piston 7.2 to process specifications. Screw 4, pressure plate 5, and support block 3 press the inner end face of pneumatic piston 7.2 from the inside, then semi-finish and finish turn the outer diameter of pneumatic piston 7.2 to process specifications. Finally, knock piston ring 7.1 off base 1, and finish turn the end face to process specifications.

[0031] At this point, a set of tooling has completed the processing of the complete set of products including the housing 2, the gear ring 7.3, the pneumatic piston 7.2, and the piston ring 7.1.

Claims

1. A clamping device for a large-mouth thin-walled nickel-copper alloy complete set of products, characterized in that: It includes a base and a clamping assembly, the outer circle of the base is evenly distributed with multiple arch-shaped bosses, the arch-shaped bosses are provided with central screw holes, one side end face of the base is provided with a first annular boss, the top surface of the first boss is evenly distributed with multiple intermediate screw holes; the clamping assembly includes a screw and a pressure plate, the front end of the screw passes through the arch-shaped boss and the pressure plate pressed on the end face of the product in turn and is fastened by a nut.

2. The clamping device for a large-mouth thin-walled nickel-copper alloy complete product according to claim 1, characterized in that: A second boss is further provided on the inner side of the first boss on one end face of the base, and a plurality of inner screw holes are evenly distributed in a circular pattern on the top face of the second boss, and a plurality of outer screw holes are evenly distributed in a circular pattern on the end face of the base outside the first boss.

3. The clamping device for a large-mouth thin-walled nickel-copper alloy complete product according to claim 1, characterized in that: The pressing plate is provided with a waist-shaped hole for the screw to pass through.

4. The clamping device for a large-mouth thin-walled nickel-copper alloy complete product according to any one of claims 1 to 3, characterized in that: The clamping assembly further comprises a support block, which is located between the arch-shaped boss and the pressure plate.

5. The clamping device for a large-mouth, thin-walled nickel-copper alloy complete product as claimed in claim 4, characterized in that: The support block is located outside the screw rod between the arch-shaped boss and the pressing plate.

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