Method for processing porous series disc workpiece in sealed oil circuit

Abstract

The processing method of the porous sealing oil passage disc workpiece discloses that one oil hole is regarded as two sections of holes, which are oil storage groove section oil hole and interface section oil hole. The segmented processing method of processing the oil storage groove section oil hole before welding and processing the interface section oil hole after welding effectively avoids the problems of uneven distance between the sealing groove and the oil hole and interference caused by welding deformation when the sealing ring is welded. The repeated positioning calculation of the same position and two perpendicular references and the center reference can effectively detect the deformation and correct the data. Finally, the effective tool setting reference and size control of the processed oil hole after turning over can be formed, which effectively ensures the coaxiality of the two sections of holes. The asbestos rope and the chip preventing pin assembled in the oil hole can effectively avoid the problem of iron chips entering the oil passage, ensure the smoothness of the oil passage, and use the rotating winding mechanism of the asbestos rope to stretch out the workpiece with the tool after processing the oil hole, and then take out the chip preventing pin from the workpiece, which is convenient for operation.

Description

Technical Field

[0001] This invention belongs to the field of mechanical processing and manufacturing technology, specifically relating to a processing method for porous disc-type workpieces in sealing oil circuits. Background Technology

[0002] With the acceleration of the localization process of marine oil equipment in my country, the variety of independently developed marine oil equipment products is increasing. Multi-hole disc structures within sealed oil circuits are widely used in key components of marine equipment oil circuit control systems. Compared to conventional land-based equipment, underwater products have higher sealing requirements and more integrated oil circuit interfaces. These oil circuit components generally contain an oil reservoir with intersecting oil holes. The ends of the oil holes have interface sealing grooves, and a sealing ring is welded to the oil reservoir, forming a closed oil storage structure between the sealing ring and the oil reservoir. If the sealing ring is welded after the oil holes and sealing grooves are machined, the welding deformation caused during welding cannot guarantee the shape and position requirements of the entire hole system. If the oil holes are machined first, then the sealing ring is welded, and then the sealing groove at the interface is machined, the deformation of the oil holes caused by welding will lead to uneven distances between the sealing groove and the oil holes, interference, and other problems, resulting in loss of sealing performance. How to ensure the distance between the holes at the interface end and the shape and position accuracy requirements of the sealing groove while welding the sealing ring has become an urgent technical problem to be solved. After the sealing ring is welded, an oil storage cavity is formed inside the oil storage tank. If iron filings enter the cavity during the machining of the oil hole, it will cause the oil passage to be blocked, thus losing the function of the control system. How to prevent iron filings from entering the oil storage cavity and blocking the oil passage is also a technical problem. Summary of the Invention

[0003] The purpose of this invention is to provide a processing method for multi-hole disc-shaped workpieces in sealing oil circuits, which solves the problem of ensuring the distance between holes at the interface end and the shape and position accuracy of the sealing groove while welding the sealing ring.

[0004] The technical solution adopted in this invention is a processing method for a porous disc-shaped workpiece in a sealed oil circuit, and the specific operation steps are as follows:

[0005] Step 1: Regularize the shape of the disc-shaped workpiece blank, process the outer diameter and inner hole of the workpiece, and consider the welding deformation problem. Leave a margin MA for both the outer diameter and inner hole of the workpiece. The margin MA adopts the E and / or F grade standard.

[0006] Step 2: Mill two vertical reference surfaces A and B on the outer side of the workpiece. The depth of the reference surfaces to the original outer circle of the workpiece is 2 / 3MA. The two reference surfaces A and B and the center C of the workpiece together form the overall reference of the workpiece. At the same time, record the distance between the three references as the reference dimensions for the subsequent deformation.

[0007] Step 3: Machining each oil storage tank and the oil holes inside the tank. The drilling depth of the oil holes inside the tank shall be ≥ the workpiece thickness / 2, but not through. At the same time, the distance between each hole and the reference surfaces A and B and the workpiece center reference C shall be recorded as a reference for the flipping process.

[0008] Step 4: Insert the anti-chip pin and asbestos rope into the oil hole. The asbestos rope is threaded onto the anti-chip pin to facilitate its removal at the end.

[0009] Step 5: Weld the sealing ring, re-verify the distance between the reference surfaces A and B and the reference surface C at the center of the hole, record the deformation, and correct it to within 0.1-0.15mm;

[0010] Step 6: Using the center of hole C as the reference, machine the outer diameter and inner hole of the workpiece to the final size of the workpiece. Remill the two perpendicular reference surfaces A1 and B1 at the reference surfaces A and B, and record the distance between the reference surfaces A1 and B1 and the center of the workpiece C. Based on the difference between the distances between the reference surfaces A1 and B1 and the center of the workpiece, recalculate the distance between each oil hole and the reference surfaces A1 and B1.

[0011] Step 7: Turn the workpiece over and machine the interface end face flat. Align the tool with reference surfaces A1 and B1. Based on the distance from the oil hole to reference surfaces A1 and B1 recalculated in Step 6, machine the sealing ring groove, machine the oil hole, connect it with the machined oil hole, and remove the asbestos rope and anti-chip pin to prevent iron filings from entering the oil storage cavity.

[0012] The invention is further characterized in that,

[0013] The disc-shaped workpiece has an oil reservoir with intersecting oil holes inside. The oil hole ends have interface sealing grooves. A sealing ring is welded to the oil reservoir, and a closed oil storage structure is formed between the sealing ring and the oil reservoir. The distance between the sealing groove and the oil hole is less than 1 mm.

[0014] Preferably, the present invention treats an oil hole as two segments, namely an oil storage tank segment oil hole and an interface segment oil hole. By adopting a segmented processing method of processing the oil storage tank segment oil hole before welding and processing the interface segment oil hole after welding, the problem of uneven distance and interference between the sealing groove and the oil hole caused by welding deformation during welding of the sealing ring is effectively avoided.

[0015] By using the vertical and circular references processed before welding, the deformation after welding is checked and corrected to within 0.1-0.15mm. After welding, mutually perpendicular references are processed in the same position. Based on the difference in distance between the references before and after welding, the distance from each oil hole to the reference after welding is recalculated, which effectively ensures the concentricity requirement of the oil holes processed at both ends, thereby forming the overall precision control of the oil holes, while ensuring the form and position requirements between the sealing groove and the oil hole processed after welding.

[0016] After welding the sealing ring, a closed oil storage cavity is formed at the oil storage tank. When turning over the interface section to process the oil hole, in order to prevent iron filings from entering the oil storage cavity and causing oil circuit blockage, an asbestos rope and anti-chip pin are inserted. The anti-chip pin placed in the oil hole is clearance-fitted with the oil hole, with a clearance size of 0.25-0.3mm.

[0017] The anti-chip pin is designed with a through hole, and a 1mm notch is milled at both ends of the through hole to serve as a clearance space between the anti-chip pin and the oil hole. When inserting the asbestos rope and the anti-chip pin, the asbestos rope is passed through the through hole of the anti-chip pin and placed at the lower end of the anti-chip pin. After the oil hole of the interface section is processed, the asbestos rope is wound around the tool using the principle of rotating rigid body winding, and leaves the workpiece together with the tool, thereby taking the anti-chip pin out of the workpiece.

[0018] The beneficial effects of this invention are:

[0019] This invention treats an oil hole as two segments: an oil reservoir segment and an interface segment. By employing a segmented machining method—machining the oil reservoir segment before welding and the interface segment after welding—it effectively avoids problems such as uneven distance and interference between the sealing groove and the oil hole caused by welding deformation during the welding of the sealing ring. Repeated positioning calculations using two mutually perpendicular references and a circular center reference at the same location effectively detect deformation and correct data, ultimately forming an effective tool setting reference and dimensional control for the oil hole after flipping. This effectively ensures the coaxiality of the two oil hole segments, thereby achieving overall precision control of the oil hole and guaranteeing the form and position requirements between the sealing groove and the oil hole after welding. Installing asbestos rope and anti-chip pins inside the oil hole effectively prevents iron filings from entering the oil passage, ensuring unobstructed oil flow. Furthermore, utilizing the rotational winding mechanism of the asbestos rope, the workpiece is pulled out along with the tool after machining the oil hole, thus removing the anti-chip pin from the workpiece for easier operation. Attached image description:

[0020] Figure 1 This is a schematic diagram of the overall structure of the sunken sealing ring oil circuit of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the raised sealing ring oil circuit of the present invention;

[0022] Figure 3 This is a simplified diagram of a porous disc-shaped workpiece processed by the method of this invention;

[0023] Figure 4 This is a schematic diagram of the pre-welding alignment reference for the method of the present invention;

[0024] Figure 5 This is a schematic diagram of the post-weld alignment reference of the method of the present invention;

[0025] Figure 6 This is a simplified diagram of the anti-dumping pin used in the method of this invention;

[0026] Figure 7 This is a schematic diagram of the structure of inserting asbestos rope and anti-chip pin before drilling the oil hole in the method of the present invention;

[0027] Figure 8 This is a schematic diagram of the oil hole processing method of the present invention.

[0028] In the figure, 1. disc-shaped workpiece, 2. sealing ring, 3. oil reservoir, 4. oil hole, 5. sealing groove, 6. anti-chip pin, 7. asbestos rope. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. All other embodiments obtained by those skilled in the art based on the described embodiments are within the scope of protection of the present invention.

[0030] This invention discloses a machining method for porous disc-type workpieces within a sealing oil circuit, applicable to both sunken sealing ring oil circuit structures (see...). Figure 1 It is also applicable to raised-ring sealing oil circuit structures (see...). Figure 2 The specific operating steps are as follows:

[0031] Step 1: Regularize the shape of the disc-shaped workpiece blank, process the outer diameter and inner hole of the workpiece, and consider the welding deformation problem. Leave a margin MA for both the outer diameter and inner hole of the workpiece. The margin MA adopts the E and / or F grade standard.

[0032] Step 2: Mill two vertical reference surfaces A and B on the outer side of the workpiece. The depth of the reference surfaces to the original outer circle of the workpiece is 2 / 3MA. The two reference surfaces A and B and the center C of the workpiece together form the overall reference of the workpiece. At the same time, record the distance between the three references as the reference dimensions for the subsequent deformation.

[0033] Step 3: Machining each oil storage tank and the oil holes inside the tank. The drilling depth of the oil holes inside the tank shall be ≥ the workpiece thickness / 2, but not through. At the same time, the distance between each hole and the reference surfaces A and B and the workpiece center reference C shall be recorded as a reference for the flipping process.

[0034] Step 4: Insert the anti-chip pin and asbestos rope into the oil hole. The asbestos rope is threaded onto the anti-chip pin to facilitate its removal at the end.

[0035] Step 5: Weld the sealing ring, re-verify the distance between the reference surfaces A and B and the reference surface C at the center of the hole, record the deformation, and correct it to within 0.1-0.15mm;

[0036] Step 6: Using the center of hole C as the reference, machine the outer diameter and inner hole of the workpiece to the final size of the workpiece. Remill the two perpendicular reference surfaces A1 and B1 at the reference surfaces A and B, and record the distance between the reference surfaces A1 and B1 and the center of the workpiece C. Based on the difference between the distances between the reference surfaces A1 and B1 and the center of the workpiece, recalculate the distance between each oil hole and the reference surfaces A1 and B1.

[0037] Step 7: Turn the workpiece over and machine the interface end face flat. Align the tool with reference surfaces A1 and B1. Based on the distance from the oil hole to reference surfaces A1 and B1 recalculated in Step 6, machine the sealing ring groove, machine the oil hole, connect it with the machined oil hole, and remove the asbestos rope and anti-chip pin to prevent iron filings from entering the oil storage cavity.

[0038] By using the vertical and circular references processed before welding, the deformation after welding is checked and corrected to within 0.1-0.15mm. After welding, mutually perpendicular references are processed in the same position. Based on the difference in distance between the references before and after welding, the distance from each oil hole to the reference after welding is recalculated, which effectively ensures the concentricity requirement of the oil holes processed at both ends, thereby forming the overall precision control of the oil holes, while ensuring the form and position requirements between the sealing groove and the oil hole processed after welding.

[0039] After welding the sealing ring, a closed oil storage cavity is formed at the oil storage tank. When turning over the interface section to process the oil hole, in order to prevent iron filings from entering the oil storage cavity and causing oil circuit blockage, an asbestos rope and anti-chip pin are inserted. The anti-chip pin placed in the oil hole is clearance-fitted with the oil hole, with a clearance size of 0.25-0.3mm.

[0040] The anti-chip pin is designed with a through hole, and a 1mm notch is milled at both ends of the through hole to serve as a clearance space between the anti-chip pin and the oil hole. When inserting the asbestos rope and the anti-chip pin, the asbestos rope is passed through the through hole of the anti-chip pin and placed at the lower end of the anti-chip pin. After the oil hole of the interface section is processed, the asbestos rope is wound around the tool using the principle of rotating rigid body winding, and leaves the workpiece together with the tool, thereby taking the anti-chip pin out of the workpiece.

[0041] Reference Figure 1 and Figure 2 The structure of the porous disc-type workpiece in the sealing oil circuit of the present invention is as follows:

[0042] The disc-shaped workpiece 1 has an oil storage tank 3 (see...) Figure 3 The oil storage tank 3 has intersecting oil holes 4, and the ends of the oil holes have interface sealing grooves 5. The oil storage tank 3 is welded with a sealing ring 2 (see...). Figure 1 and Figure 2 The sealing ring 2 and the oil storage tank 3 form a closed oil storage structure. Usually, the sealing groove 5 is less than 1 mm away from the oil hole 4.

[0043] This invention discloses a machining method for a multi-hole disc-shaped workpiece within a sealed oil passage. One oil hole 4 is considered as two segments: an oil reservoir segment and an interface segment (see...). Figure 8 The segmented machining method, which involves machining the oil holes in the oil storage tank section before welding and machining the oil holes in the interface section after welding, effectively avoids problems such as uneven distance and interference between the sealing groove 5 and the oil hole 4 caused by welding deformation during the welding of the sealing ring 2.

[0044] Through two mutually perpendicular datums A1 and B1 and the central datum C (see...) processed before welding... Figure 5 After welding, the deformation was checked and corrected to within (0.1-0.15) mm. After welding, the machining amounts at the same position were perpendicular to each other. Based on the difference between the pre-weld and post-weld reference distances, the distance from each oil hole 4 to the post-weld reference was recalculated, which effectively ensured the concentricity requirement of the oil holes 4 machined at both ends, thereby forming the overall precision control of the oil holes 4, and at the same time ensuring the form and position requirements between the sealing groove 5 machined after welding and the oil holes 4.

[0045] After welding the sealing ring 2, a closed oil storage cavity is formed at the oil storage tank 3. When turning over the interface section for machining the oil hole, in order to prevent iron filings from entering the oil storage cavity and causing oil passage blockage, an asbestos rope 7 and an anti-chip pin 6 are inserted (see...). Figure 7 ). Thread the asbestos rope 7 onto the chip-proof pin 6 (see Figure 6 Place it on the bottom of the anti-chip pin 6 and insert it into the oil hole of the pre-machined oil storage tank section. The length L of the anti-chip pin 6 must be less than the depth of the oil hole 4.

[0046] The asbestos rope 7 prevents large iron filings from entering and also prevents the drill bit from directly contacting the anti-chip pin 7, protecting the cutting tool. The outer diameter D1 of the anti-chip pin 6 and the inner diameter d2 of the oil hole 4 are in clearance fit, with a clearance size of (0.25-0.3) mm, preventing the asbestos rope and small iron filings from entering the oil reservoir. The asbestos rope 7 connects to the anti-chip pin 6 through the hole with diameter d1 at its end. Each end of the hole with diameter d1 at its end is machined with a notch of length L1 and a maximum width of (D1-B1) / 2. When the asbestos rope 7 is inserted into the oil hole 4, it creates a clearance space within the oil hole 4 after passing through the anti-chip pin 6. After the oil hole 4 is fully machined, using the principle of rotating rigid body winding, the asbestos rope 7 will wrap around the cutting tool and leave the workpiece along with it, thus carrying the anti-chip pin 6 out of the workpiece.

[0047] This invention provides excellent guidance for the manufacturing process of multi-hole disc-shaped workpieces within sealing oil circuits, offering a reference for the future process design and manufacturing of such products. It provides a new method for machining complex hole systems and sealing oil circuits; employs a segmented machining method for the oil holes within the oil reservoir, utilizing repeated positioning calculations of two mutually perpendicular references and a circular center reference at the same position before and after welding to ensure the distance between holes at the interface end and the dimensional accuracy of the sealing groove; and provides a new method to prevent iron filings from entering the oil circuit channels.

Claims

1. A method for machining a perforated disc-shaped workpiece within a sealed oil passage, characterized in that, Follow these steps: Step 1: Regularize the shape of the disc-shaped workpiece blank, process the outer diameter and inner hole of the workpiece, and consider the welding deformation problem. Leave a margin MA for both the outer diameter and inner hole of the workpiece. The margin MA adopts the E and / or F grade standard. Step 2: Mill two vertical reference surfaces A and B on the outer side of the workpiece. The depth of the reference surfaces to the original outer circle of the workpiece is 2 / 3MA. The two reference surfaces A and B and the center C of the workpiece together form the overall reference of the workpiece. At the same time, record the distance between the three references as the reference dimensions for the subsequent deformation. Step 3: Machining each oil storage tank and the oil holes inside the tank. The drilling depth of the oil holes inside the tank shall be ≥ the workpiece thickness / 2, but not through. At the same time, the distance between each hole and the reference surfaces A and B and the workpiece center reference C shall be recorded as a reference for the flipping process. Step 4: Insert the anti-chip pin and asbestos rope into the oil hole. The asbestos rope is threaded onto the anti-chip pin to facilitate its removal at the end. Step 5: Weld the sealing ring, re-verify the distance between the reference surfaces A and B and the reference surface C at the center of the hole, record the deformation, and correct it to within 0.1-0.15mm; Step 6: Using the center of hole C as the reference, machine the outer diameter and inner hole of the workpiece to the final size of the workpiece. Remill the two perpendicular reference surfaces A1 and B1 at the reference surfaces A and B, and record the distance between the reference surfaces A1 and B1 and the center of the workpiece C. Based on the difference between the distances between the reference surfaces A1 and B1 and the center of the workpiece, recalculate the distance between each oil hole and the reference surfaces A1 and B1. Step 7: Turn the workpiece over and machine the interface end face flat. Align the tool with reference surfaces A1 and B1. Based on the distance from the oil hole to reference surfaces A1 and B1 recalculated in Step 6, machine the sealing ring groove, machine the oil hole, connect it with the machined oil hole, and remove the asbestos rope and anti-chip pin to prevent iron filings from entering the oil storage cavity.

2. The processing method for a porous disc-shaped workpiece within a sealed oil passage according to claim 1, characterized in that, The disc-shaped workpiece (1) has an oil storage tank (3), an intersecting oil hole (4) in the oil storage tank (3), an interface sealing groove (5) at the end of the oil hole, a sealing ring (2) welded to the oil storage tank (3), and a closed oil storage structure is formed between the sealing ring (2) and the oil storage tank (3). The distance between the sealing groove (5) and the oil hole (4) is less than 1 mm.

3. The processing method for a porous disc-shaped workpiece within a sealed oil passage according to claim 1, characterized in that, One oil hole is regarded as two sections, namely the oil storage tank section and the interface section. The segmented processing method is adopted, which is to process the oil storage tank section before welding and the interface section after welding.

4. The processing method for a porous disc-shaped workpiece within a sealed oil passage according to claim 2, characterized in that, By using the vertical and circular references processed before welding, the deformation after welding is checked and corrected to within 0.1-0.15mm. After welding, mutually perpendicular references are processed in the same position. Based on the difference in distance between the references before and after welding, the distance from each oil hole to the reference after welding is recalculated, which effectively ensures the concentricity requirement of the oil holes processed at both ends, thereby forming the overall precision control of the oil holes, while ensuring the form and position requirements between the sealing groove and the oil hole processed after welding.

5. The processing method for a porous disc-shaped workpiece within a sealed oil passage according to claim 2, characterized in that, The anti-chip pin placed in the oil hole is clearance-fitted with the oil hole, with a clearance dimension of 0.25-0.3mm.

6. The machining method for a porous disc-shaped workpiece within a sealed oil passage according to claim 1, characterized in that, The anti-chip pin is designed with a through hole, and a 1mm notch is milled at both ends of the through hole to serve as a clearance space between the anti-chip pin and the oil hole. When inserting the asbestos rope and the anti-chip pin, the asbestos rope is passed through the through hole of the anti-chip pin and placed at the lower end of the anti-chip pin. After the oil hole of the interface section is processed, the asbestos rope is wound around the tool using the principle of rotating rigid body winding, and leaves the workpiece together with the tool, thereby bringing the anti-chip pin out of the workpiece.

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