Method for cutting off baffle ring forge piece from nickel-copper alloy thin-wall annular continuous forging part blank
Through the method of precise cutting of CNC horizontal lathe, the problem of long and low efficiency of nickel-copper alloy thin-wall annular parts is solved, and the processing effect of complete processing and high efficiency is achieved.
Patent Information
- Application Number
- CN202510261514.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-05-09
AI Technical Summary
The existing nickel-copper alloy thin-wall annular parts processing technology takes a long time, requires repeated flips, and is prone to cause defective products and low efficiency.
The CNC horizontal lathe method is adopted, and a series of precise cutting steps are achieved through a series of precise cutting steps, including flattening the outer end face of the gear ring, cutting the outer circle, cutting the outer circle groove processing, cutting the outer circle, cutting the width of the inner hole, and cutting the inner hole, so as to achieve one-time processing.
It effectively reduces deformation caused by clamping, cutting heat and internal stress, improves processing efficiency, reduces repeated flip processing, and ensures that the width accuracy of the finished product of the retaining ring is within 3 wires.
Smart Images
Figure CN119952421A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of thin-walled annular parts processing, and in particular relates to a method for cutting off a retaining ring forging from a nickel-copper alloy thin-walled annular continuously forged part blank. Background Art
[0002] In the marine shaft transmission system, the emergency sealing device is mainly used to prevent the seawater outside the pressure hull from entering the pressure compartment from the stern shaft and the stern shaft hub hole when the shaft compensation sealing device is damaged and fails, thus playing an emergency sealing role. The main material of the emergency sealing device is nickel-copper alloy, which has large processing deformation, and the temperature difference affects the measurement and processing accuracy. The commonly used processing method is to cut off the retaining ring on the vertical lathe, and then repeatedly turn it over on a special tooling. It is time-consuming and requires repeated turning over. It has higher requirements for product protection to avoid elastic deformation caused by bumps and collisions, which is very easy to cause defective products and is a bottleneck for improving the efficiency of mass processing. Summary of the invention
[0003] The purpose of the present invention is to address the defects of existing processing technology and improve efficiency, and to provide a method for cutting off retaining ring forgings from nickel-copper alloy thin-walled annular continuously forged parts blanks that is easy to operate and efficient, which can effectively reduce deformation caused by clamping, cutting heat and internal stress, while ensuring that processing is completed in one go.
[0004] To achieve the above object, the present invention provides a method for cutting off a retaining ring forging from a nickel-copper alloy thin-walled annular continuous forging part blank. The continuous forging part blank includes a body and a retaining ring forging. The method for cutting off the retaining ring forging has the following specific steps:
[0005] 1) Clamp and align the continuous forging parts on the CNC horizontal lathe
[0006] 2) The outer end surface of the retaining ring is flat
[0007] 3) Reduction amount of outer circle turning of retaining ring forging
[0008] 4) Processing the outer circle cutting groove of the retaining ring forging
[0009] 5) The outer diameter of the retaining ring forging is polished to size
[0010] 6) The width of the retaining ring forging is polished to size
[0011] 7) Reduction amount of inner hole of retaining ring forging
[0012] 8) Cut the inner hole of the retaining ring forging to size
[0013] 9) Remove the finished retaining ring.
[0014] Furthermore, in the step 2), the outer end surface A of the retaining ring forging is flat and used as a width measurement reference; the blade arc angle is ≤R0.8mm, the rotation speed is 10-12r / min, and the cutting speed is 0.2-0.3mm / r.
[0015] Furthermore, in the step 3), the arc angle of the blade used for the outer circle turning of the retaining ring forging is ≤R0.8mm, the outer circle diameter of the retaining ring forging after the outer circle turning of the retaining ring forging is D2, and the outer circle processing length of the retaining ring forging is L1; the speed during turning is 10-12r / min, the cutting speed is 0.3-0.5mm / r, and the cutting depth is 0.6-0.8mm;
[0016] Wherein, D2-D1=0.5-0.8 mm, D1 is the outer diameter of the finished retaining ring 3; and L1 includes the width of the measuring tool foot.
[0017] Furthermore, in the step 4), a right-angle cutter with a radius R ≤ 0.2 mm and a blade width of 3 to 4 mm is used to process the outer circle cutting groove 4 of the retaining ring forging; the width of the cutting groove is L2 and the diameter of the cutting groove is D3; the rotation speed during turning is 8 to 10 r / min and the cutting speed is 0.06 to 0.1 mm / r to avoid the processed outer circle from tilting in the direction of the cutting groove during the grooving process;
[0018] And D0-D3=0.8~1mm, D0 is the inner diameter of the finished retaining ring;
[0019] L3=L1-L2, and L3-L0=1-1.5 mm, L0 is the length of the finished retaining ring.
[0020] Furthermore, in the step 5), a dial indicator is used to check the runout of the outer diameter D2 of the processed retaining ring forging in step 3), and the outer diameter of the retaining ring forging is polished to the outer diameter D1 of the finished retaining ring; the rotation speed during turning is 10 to 12 r / min and the cutting speed is 0.15 to 0.2 mm / r.
[0021] Furthermore, in the step 6), the inner end face of the cutting groove of the retaining ring forging is first polished, and the excess width of the outer end face is turned to ensure that the width of the retaining ring forging is the length L0 of the finished retaining ring; the rotation speed during turning is 10-12r / min and the cutting speed is 0.06-0.08mm / r.
[0022] Furthermore, in the step 7), after the inner hole of the retaining ring forging is reduced by turning, the inner hole diameter of the retaining ring forging is D4, the inner hole length is L4, the turning speed is 10-12 r / min, and the cutting speed is 0.2-0.3 mm / r;
[0023] And D3-D4=4~4.5mm, L4-L0=1~2mm.
[0024] Furthermore, in the step 8), the inner hole of the retaining ring forging is cut to the inner diameter D0 of the retaining ring finished product size, and the rotation speed during turning is 8 to 10 r / min and the cutting speed is 0.06 to 0.08 mm / r;
[0025] And L5 / [(D0-D4) / 2]=3 / 4 is satisfied, L5 is the thickness of the cutting groove, and the thickness of the cutting groove occupies 3 / 4 of the blade width.
[0026] Furthermore, in the step 8), the cutting depth of the last cut is observed, and when the cutting depth is about to be reached, the outer end surface of the finished retaining ring is gently pushed toward the inner end surface to hang the finished retaining ring on the step of the cutting groove.
[0027] Furthermore, in the method for cutting off the retaining ring forging, cutting fluid is used to eliminate cutting heat during the processing.
[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is easy to process, reliable and efficient, can effectively reduce deformation caused by clamping, cutting heat and internal stress, and at the same time ensure one-time processing, reducing the process of repeated flipping processing; the method of the present invention can cut and process nickel-copper alloy thin-walled annular forging retaining rings with a diameter exceeding 1000mm, a wall thickness exceeding 10mm, and a width within 10mm, and the width accuracy of the retaining ring finished product is guaranteed to be within 3 wires; at the same time, it can be processed in one step on a CNC horizontal lathe, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of a blank of a nickel-copper alloy thin-walled annular continuously forged part of the present invention;
[0030] Figure 2 This is a schematic diagram of a finished retaining ring of the present invention;
[0031] Figure 3 This is a schematic diagram of step 1) of the processing method of the present invention;
[0032] Figure 4 It is a schematic diagram of steps 2) and 3) of the processing method of the present invention;
[0033] Figure 5 This is a schematic diagram of step 4) of the processing method of the present invention;
[0034] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;
[0035] Figure 7 This is a schematic diagram of step 5) of the processing method of the present invention;
[0036] Figure 8 This is a schematic diagram of step 6) of the processing method of the present invention;
[0037] Fig. 9 It is a schematic diagram of step 7) of the processing method of the present invention;
[0038] Fig.10 It is a schematic diagram of step 8) of the processing method of the present invention;
[0039] Fig.11 for Fig.10 The enlarged schematic diagram at C in the middle;
[0040] Fig.12 It is a schematic diagram of step 9) of the processing method of the present invention;
[0041] Fig.13 for Fig.12 Enlarged schematic diagram at point D in the middle. DETAILED DESCRIPTION
[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0043] like Figure 1 The figure shows a nickel-copper alloy thin-walled annular continuous forging part blank, which includes a body 1 and a retaining ring forging 2. The present invention adopts a method for cutting the retaining ring forging using a CNC horizontal lathe, and the specific steps are as follows:
[0044] 1) Clamp and align the continuous forging parts on the CNC horizontal lathe
[0045] like Figure 3 The continuously forged part blank is shown in the figure. The clamping force is observed by a dial indicator, with the needle pressed on the outer circle of the continuously forged part blank next to the lathe jaws. The dial indicator is observed when the jaws are adjusted to clamp. A slight movement of the pointer of less than 10 threads is sufficient to avoid clamping deformation of the continuously forged part blank caused by excessive clamping force.
[0046] 2) The outer end surface of the retaining ring is flat
[0047] The outer end surface A of the retaining ring forging is flat and serves as the width measurement reference; the arc angle of the blade used is ≤R0.8mm, the rotation speed is 10~12r / min, and the cutting speed is 0.2~0.3mm / r.
[0048] 3) Reduction amount of outer circle turning of retaining ring forging
[0049] The arc angle of the blade used for the outer circle turning of the retaining ring forging is ≤R0.8mm to avoid excessive arc angle causing large cutting resistance and increased cutting heat causing workpiece deformation; Figure 4 After the outer circle of the retaining ring forging is reduced, the outer circle diameter of the retaining ring forging is D2, and a 0.5-0.8mm polishing knife amount is left. The outer circle processing length of the retaining ring forging (i.e. Figure 4 The direction of the left and right sides of the middle edge) is L1; the speed during turning is 10-12r / min, the cutting speed is 0.3-0.5mm / r, and the cutting depth is 0.6-0.8mm;
[0050] Wherein, D2-D1=0.5-0.8 mm, D1 is the outer diameter of the finished retaining ring 3; and L1 includes the width of the measuring tool foot.
[0051] 4) Processing the outer circle cutting groove of the retaining ring forging
[0052] When machining the outer cutting groove 4 of the retaining ring forging, a right-angle cutter with a radius R ≤ 0.2 mm and a blade width of 3 to 4 mm is used; Figure 5 , 6 The width of the cutting groove shown (i.e. Figure 5 The diameter of the cutting groove is D3; the speed of turning is 8-10r / min, and the cutting speed is 0.06-0.1mm / r, so as to avoid the machined outer circle tilting in the direction of the cutting groove during the grooving process;
[0053] And D0-D3=0.8~1mm, D0 is the inner diameter of the finished retaining ring;
[0054] L3=L1-L2, and L3-L0=1-1.5 mm, L0 is the length of the finished retaining ring 3.
[0055] 5) The outer diameter of the retaining ring forging is polished to size
[0056] Use a dial indicator to check the runout of the outer diameter D2 of the processed retaining ring forging in step 3), and the size of the outer diameter D1 of the finished retaining ring from the outer diameter of the polished retaining ring forging, such as Figure 7 As shown; the rotation speed during turning is 10~12r / min and the cutting speed is 0.15~0.2mm / r.
[0057] 6) The width of the retaining ring forging is polished to size
[0058] First, the inner end face of the cutting groove of the retaining ring forging is polished, and the excess width of the outer end face is turned to ensure that the width of the retaining ring forging is the length L0 of the retaining ring finished product. Figure 8 As shown; the rotation speed during turning is 10-12r / min and the cutting speed is 0.06-0.08mm / r.
[0059] 7) Reduction amount of inner hole of retaining ring forging
[0060] like Fig. 9 , 10 , 11 shows that after the inner hole of the retaining ring forging is reduced by turning, the inner hole diameter of the retaining ring forging is D4, and the inner hole length (i.e. Fig. 9 The left and right directions of the center are L4, the rotation speed during turning is 10-12r / min, and the cutting speed is 0.2-0.3mm / r;
[0061] And D3-D4=4~4.5mm, L4-L0=1~2mm.
[0062] 8) Cut the inner hole of the retaining ring forging to size
[0063] The inner hole of the retaining ring forging is cut to the inner diameter D0 of the retaining ring finished product size, and the speed during turning is 8-10r / min and the cutting speed is 0.06-0.08mm / r;
[0064] And it satisfies L5 / [(D0-D4) / 2]=3 / 4, L5 is the thickness of the cutting groove, and the thickness of the cutting groove accounts for 3 / 4 of the blade width, avoiding the influence of increased cutting force on deformation and the situation of tool giving up due to small cutting surface, resulting in unqualified size.
[0065] 9) Remove the finished retaining ring
[0066] like Fig.12 , 13 Observe the cutting depth of the last cut as shown in the figure. When the cutting depth is about to be reached, Figure 2 The outer end surface (as shown) is gently pushed toward the inner end surface to hang the finished retaining ring on the step of the cutting groove to prevent the finished retaining ring from tipping outwards and falling to the digging knife.
[0067] During the above processing, a small flow rate of cutting fluid is used to eliminate the cutting heat and avoid excessive cooling that causes a large temperature difference between the parts and the measuring tool, affecting the measurement accuracy.
[0068] The difficulties in cutting off the retaining ring forging from the blank of the nickel-copper alloy thin-walled annular continuous forging part are: the influence of machining the cutting groove on the tilting of the outer circle of the machined retaining ring forging to the inner end face, the guarantee of the width precision requirement of the finished retaining ring of 3 wires, the influence of turning the inner hole on the flatness of the outer end face of the machined retaining ring forging, how to remove the finished retaining ring after turning and cutting the inner hole, the control of cutting deformation during machining, and the control of the temperature difference between the cooling part and the measuring tool. During the machining process of the present invention, a small flow cutting fluid is used to eliminate the cutting heat, avoid excessive cooling causing a large temperature difference between the part and the measuring tool, and affect the measurement efficiency; during the machining process, a blade with a small arc angle and a right-angle cutter are used to improve the cutting sharpness of the blade and ensure smooth cutting, and each process step matches the cutting rotation speed and speed to ensure the roughness and size requirements of each machined surface.
[0069] The method of the invention can be used for cutting and processing nickel-copper alloy thin-walled annular forging retaining rings with a diameter exceeding 1000 mm, a wall thickness exceeding 10 mm and a width within 10 mm, and the width accuracy of the retaining ring finished product is guaranteed to be within 3 wires; at the same time, the processing is completed in one step on a CNC horizontal lathe, thereby improving efficiency.
Claims
1. A method for cutting off a retaining ring forging from a nickel-copper alloy thin-walled annular continuous forging part blank, wherein the continuous forging part blank comprises a body and a retaining ring forging, characterized in that: The specific steps of the method for cutting off the retaining ring forging are as follows: 1) Clamp and align the continuous forging parts on the CNC horizontal lathe 2) The outer end surface of the retaining ring is flat 3) Reduction amount of outer circle turning of retaining ring forging 4) Processing the outer circle cutting groove of the retaining ring forging 5) The outer diameter of the retaining ring forging is polished to size 6) The width of the retaining ring forging is polished to size 7) Reduction amount of inner hole of retaining ring forging 8) Cut the inner hole of the retaining ring forging to size 9) Remove the finished retaining ring.
2. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 1, characterized in that: In the step 2), the outer end surface A of the retaining ring forging is flat and used as a width measurement reference; the blade arc angle is ≤R0.8mm, the rotation speed is 10-12r / min, and the cutting speed is 0.2-0.3mm / r.
3. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 1, characterized in that: In the step 3), the arc angle of the blade used for the outer circle turning reduction of the retaining ring forging is ≤R0.8mm, the outer circle diameter of the retaining ring forging after the outer circle turning reduction is D2, and the outer circle processing length of the retaining ring forging is L1; the speed during turning is 10-12r / min, the cutting speed is 0.3-0.5mm / r, and the cutting depth is 0.6-0.8mm; Wherein, D2-D1=0.5-0.8 mm, D1 is the outer diameter of the finished retaining ring 3; and L1 includes the width of the measuring tool foot.
4. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 3 is characterized in that: In the step 4), a right-angle cutter with a radius R ≤ 0.2 mm and a blade width of 3 to 4 mm is used to process the outer circle cutting groove 4 of the retaining ring forging; the width of the cutting groove is L2 and the diameter of the cutting groove is D3; the rotation speed during turning is 8 to 10 r / min and the cutting speed is 0.06 to 0.1 mm / r to avoid the processed outer circle from tilting in the direction of the cutting groove during the cutting process; And D0-D3=0.8~1mm, D0 is the inner diameter of the finished retaining ring; L3=L1-L2, and L3-L0=1-1.5 mm, L0 is the length of the finished retaining ring.
5. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 3, characterized in that: In the step 5), a dial indicator is used to check the runout of the outer diameter D2 of the processed retaining ring forging in step 3), and the outer diameter of the polished retaining ring forging is the size of the outer diameter D1 of the finished retaining ring; the rotation speed during turning is 10-12 r / min and the cutting speed is 0.15-0.2 mm / r.
6. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 3, characterized in that: In the step 6), the inner end face of the cutting groove of the retaining ring forging is first polished, and the excess width of the outer end face is turned to ensure that the width of the retaining ring forging is the length L0 of the finished retaining ring; the rotation speed during turning is 10-12r / min and the cutting speed is 0.06-0.08mm / r.
7. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 4, characterized in that: In the step 7), after the inner hole of the retaining ring forging is reduced by turning, the inner hole diameter of the retaining ring forging is D4, the inner hole length is L4, the turning speed is 10-12r / min, and the cutting speed is 0.2-0.3mm / r; And D3-D4=4~4.5mm, L4-L0=1~2mm.
8. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 7, characterized in that: In the step 8), the inner hole of the retaining ring forging is cut to the inner diameter D0 of the retaining ring finished product size, and the rotation speed during turning is 8 to 10 r / min and the cutting speed is 0.06 to 0.08 mm / r; And L5 / [(D0-D4) / 2]=3 / 4 is satisfied, L5 is the thickness of the cutting groove, and the thickness of the cutting groove occupies 3 / 4 of the blade width.
9. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 8, characterized in that: In step 8), observe the cutting depth of the last cut, and when the cutting depth is about to be reached, gently push the outer end surface of the finished retaining ring toward the inner end surface to hang the finished retaining ring on the step of the cutting groove.
10. The method for cutting off the retaining ring forging from the nickel-copper alloy thin-walled annular continuous forging part blank according to claim 1, characterized in that: The method for cutting off the retaining ring forging adopts cutting fluid to eliminate cutting heat during the processing.