Honing electrolysis device for blind hole

Abstract

The invention relates to a honing electrolysis device for a blind hole. The honing electrolysis device is used for guaranteeing stability and high efficiency of precise honing of the hole wall of the blind hole and reliability of polishing of the bottom of the blind hole. The honing electrolysis device for the blind hole comprises a honing transmission mechanism, an electrolyte input mechanism and a honing electrolysis mechanism, the honing transmission mechanism is connected with the honing machine and used for driving the honing electrolysis mechanism to rotate and adjusting the honing hole diameter of the honing electrolysis mechanism. Electrolyte runners are arranged in the honing transmission mechanism and the honing electrolysis mechanism; after the honing hole diameter of the honing electrolysis mechanism is adjusted in place, the honing transmission mechanism drives the honing electrolysis mechanism to rotate, and the hole wall of the blind hole of the part is honed; and meanwhile, after an electric field is applied between the electrolyte input mechanism and the part, under the action of the electric field, electrolyte provided by the electrolyte input mechanism is conveyed to the bottom of the blind hole of the part through the electrolyte flow channel and flows through a gap between the wall of the blind hole of the part and the honing electrolysis mechanism, and electrolysis on the bottom and the wall of the blind hole of the part is achieved.

Description

Technical Field

[0001] The present application relates to the field of blind hole honing of parts, and in particular to a blind hole honing electrolytic device. Background Art

[0002] In the processing of metal blind hole parts, there are problems such as chip removal and insufficient linear speed. The back cutter groove at the bottom of the blind hole often has poor surface quality or even deep scratches. The use of traditional polishing methods such as sanding belts will generally damage the wall of the blind hole and is difficult to control manually. In the precision honing of the center hole, due to problems such as materials, limited stroke, and poor coolant flow, the honing efficiency is low and the accuracy is difficult to guarantee. Summary of the invention

[0003] The invention provides a blind hole honing electrolytic device, which is used to ensure stable and efficient precision honing of the blind hole wall and reliability of blind hole bottom polishing.

[0004] The technical solution of the present invention is: A blind hole honing electrolysis device comprises: a honing transmission mechanism, an electrolyte input mechanism and a honing electrolysis mechanism; The honing transmission mechanism is connected to the honing machine and is used to drive the honing electrolytic mechanism to rotate and adjust the honing aperture of the honing electrolytic mechanism; The honing transmission mechanism and the honing electrolytic mechanism are provided with electrolyte flow channels; After the honing aperture of the honing electrolytic mechanism is adjusted to the right position, the honing transmission mechanism drives the honing electrolytic mechanism to rotate to hone the blind hole wall of the part; at the same time, after an electric field is applied between the electrolyte input mechanism and the part, under the action of the electric field, the electrolyte provided by the electrolyte input mechanism is transported to the bottom of the blind hole of the part through the electrolyte flow channel, and flows through the gap between the blind hole wall of the part and the honing electrolytic mechanism, thereby realizing electrolysis of the bottom and wall of the blind hole of the part.

[0005] Preferably, the honing transmission mechanism comprises: a transmission body, a push rod and a limit screw; The transmission body is connected to the rotating spindle of the honing machine; The push rod is connected to the propulsion device of the honing machine; One end of the push rod is movably extended into the transmission body and is connected with the honing electrolytic mechanism in the transmission body; The limit screw limits the advancement range of the push rod relative to the transmission body; The transmission body and the push rod are provided with a first electrolyte flow channel which is communicated with the outlet of the electrolyte input mechanism.

[0006] Preferably, a limiting groove is provided on the outer wall of the push rod along its axial direction, and a part of the limiting screw passes through the transmission body and extends into the limiting groove.

[0007] Preferably, the electrolytic honing mechanism comprises: a feed mandrel, a honing sleeve and an oilstone; One end of the feed mandrel is connected to the push rod in the transmission body, and a second electrolyte flow channel connected to the first electrolyte flow channel is provided in the feed mandrel, and the second electrolyte flow channel is connected to the bottom of the blind hole of the part; The honing sleeve is mounted on the feed mandrel; The oilstone is assembled on a part of the outer wall of the honing sleeve along the axial direction of the honing sleeve, and is partially protruded from the outer wall of the honing sleeve; The feed mandrel and the honing sleeve form a tapered fit on the side close to the bottom of the blind hole of the part; When the push rod pushes the feed core shaft to move toward the bottom of the blind hole of the part, the honing sleeve is expanded, increasing the honing hole diameter of the honing electrolytic mechanism.

[0008] Preferably, the honing sleeve is provided with an open groove connecting the inner hole wall and the outer wall thereof.

[0009] Preferably, the electrolyte input mechanism comprises: an electrolyte input device, an electric connecting rod and a connecting nut; The connecting nut connects and fixes the honing sleeve and the transmission body; The electrolyte input device is sleeved on the transmission body and the connecting nut, and the transmission body and the connecting nut can rotate relative to the electrolyte input device; The connecting rod is installed on the electrolyte input device and is used to connect to the negative pole of the power supply; The outlet of the electrolyte input device is connected to the first electrolyte flow channel.

[0010] Preferably, the transmission body and the push rod are made of insulating material.

[0011] Preferably, the feed mandrel and the honing sleeve are made of stainless steel.

[0012] Preferably, the oilstone is made of silicon carbide.

[0013] The beneficial effects of the present invention are: Since the honing transmission mechanism is connected to the honing machine, it can accurately drive the honing electrolytic mechanism to rotate, and flexibly adjust the honing aperture according to the processing requirements, ensuring the accuracy and stability of the honing process, and effectively improving the dimensional accuracy and surface quality of the blind hole. The electric field applied between the electrolyte input mechanism and the parts enables the electrolyte to be accurately transported to the bottom of the blind hole through the electrolyte channel, and flow through the gap between the blind hole wall and the honing electrolytic mechanism. This design not only ensures the full flow of the electrolyte, but also realizes efficient electrolytic processing of the bottom and wall of the blind hole under the action of the electric field, removes impurities and burrs generated during the processing, and further improves the surface finish of the hole wall. Through the organic combination of the honing transmission mechanism, the electrolyte input mechanism and the honing electrolytic mechanism, honing and electrolytic processing are carried out simultaneously. During the honing process, the flow and electrolysis of the electrolyte can remove the grinding chips in real time and reduce the secondary scratches on the machined surface caused by the grinding chips. At the same time, electrolytic machining can further optimize the microstructure of the hole wall and reduce the surface roughness. This collaborative working mode significantly improves the processing efficiency and shortens the processing cycle. The device can adapt to the processing needs of blind holes of different sizes and shapes. By adjusting the parameters of the honing transmission mechanism and the electrolyte channel, it can flexibly cope with the processing tasks of various complex workpieces and has a wide range of applicability. Through the combination of honing and electrolytic machining, the device can effectively improve the processing quality of blind holes, improve the surface hardness and wear resistance of the hole wall, extend the service life of parts, and reduce tool wear during the processing process, thereby reducing processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a blind hole honing electrolysis device in an embodiment of the present application; Figure 2 for Figure 1 AA section view. DETAILED DESCRIPTION

[0015] Reference Figure 1 and Figure 2 The present application provides a blind hole honing electrolysis device, comprising: a honing transmission mechanism connected to a honing machine, an electrolyte input mechanism and a honing electrolysis mechanism; the honing transmission mechanism is connected to the honing electrolysis mechanism, and is used to drive the honing electrolysis mechanism to rotate and adjust the honing aperture of the honing electrolysis mechanism; the honing transmission mechanism and the honing electrolysis mechanism are provided with electrolyte flow channels; after the honing aperture of the honing electrolysis mechanism is adjusted to the right position, the honing The grinding transmission mechanism drives the honing electrolytic mechanism to rotate, and hones the blind hole wall of the part 10; at the same time, after an electric field is applied between the electrolyte input mechanism and the part 10, under the action of the electric field, the electrolyte provided by the electrolyte input mechanism is transported to the bottom of the blind hole of the part 10 through the electrolyte flow channel, and flows through the gap between the blind hole wall of the part 10 and the honing electrolytic mechanism, thereby realizing electrolysis of the blind hole bottom and wall of the part 10.

[0016] Since the honing transmission mechanism is connected to the honing machine, the honing transmission mechanism can accurately drive the honing electrolytic mechanism to rotate under the drive of the honing machine, and flexibly adjust the honing aperture according to processing requirements, thereby ensuring the accuracy and stability of the honing process and effectively improving the dimensional accuracy and surface quality of the blind hole.

[0017] By applying an electric field between the electrolyte input mechanism and the part 10, the electrolyte can be accurately transported to the bottom of the blind hole of the part 10 through the electrolyte channel, and flow through the gap between the blind hole wall and the honing electrolytic mechanism; this design not only ensures the sufficient flow of the electrolyte, but also enables the electrolyte to achieve efficient electrolytic processing of the bottom and wall of the blind hole under the action of the electric field, remove impurities and burrs generated during the processing, and further improve the surface finish of the hole wall.

[0018] Through the organic combination of the honing transmission mechanism, electrolyte input mechanism and honing electrolytic mechanism, honing and electrolytic machining can be carried out simultaneously. During the honing process, the flow of electrolyte and electrolysis can remove the grinding chips in real time and reduce the secondary scratches on the machined surface. At the same time, electrolytic machining can further optimize the microstructure of the hole wall and reduce the surface roughness. This collaborative working mode significantly improves the machining efficiency and shortens the machining cycle.

[0019] The device can adapt to the needs of blind hole processing of different sizes and shapes. By adjusting the parameters of the honing transmission mechanism and the electrolyte channel, it can flexibly cope with the processing tasks of a variety of complex workpieces and has wide applicability.

[0020] By combining honing with electrolytic machining, the device can effectively improve the machining quality of the blind hole, increase the surface hardness and wear resistance of the hole wall, extend the service life of the part 10, and at the same time reduce tool wear during machining and reduce machining costs.

[0021] Reference Figure 1 In the embodiment of the present application, the honing transmission mechanism includes: a transmission body 1, a push rod 2 and a limit screw 3.

[0022] The transmission body 1 is connected to the rotating main shaft of the honing machine and rotates along with the rotating main shaft.

[0023] One end of the push rod 2 is connected to the propulsion device of the honing machine, and the other end of the push rod 2 is movably extended into the transmission body 1 and connected to the honing electrolytic mechanism in the transmission body 1. Under the action of the propulsion device, the push rod 2 moves forward and backward along its axial direction inside the transmission body 1, and the movement of the push rod 2 drives the honing electrolytic mechanism to adjust the honing aperture.

[0024] The limit screw 3 limits the advancement range of the push rod 2 relative to the transmission body 1. Figure 1A limiting groove 21 is provided on the outer wall of the push rod 2 along its axial direction, and a screw hole is provided on the transmission body 1, the screw hole is connected from the outer wall of the transmission body 1 to its inner hole, and the screw hole is arranged opposite to the limiting groove 21. The limiting screw 3 is screwed into the screw hole from the outer side of the transmission body 1, and is partially inserted into the limiting groove 21. Therefore, when the push rod 2 moves forward and backward relative to the transmission body 1, the maximum length of the limiting groove 21 will limit the maximum position of the push rod 2 moving to the left or right, that is, the pushing range of the push rod 2 is limited, thereby realizing the adjustment and limitation of the honing aperture of the honing electrolytic mechanism, avoiding the problem of excessive expansion or insufficient advancement of the honing sleeve 8.

[0025] The transmission body 1 and the push rod 2 are provided with a first electrolyte flow channel connected to the outlet of the electrolyte input mechanism. Specifically, the transmission body 1 is provided with a first flow channel, and the push rod 2 is provided with a second flow channel. The first flow channel and the second flow channel together constitute the first electrolyte flow channel, and the first flow channel is connected to the outlet of the electrolyte input mechanism. According to actual needs, the first electrolyte flow channel can be set into multiple groups, and the multiple groups of first electrolyte flow channels are evenly arranged around the periphery of the transmission body 1 and the push rod 2. Multiple groups of first electrolyte flow channels can increase the electrolyte delivery path, increase the flow rate and flow velocity of the electrolyte, and ensure that the electrolyte can reach the honing electrolytic mechanism quickly and stably.

[0026] In the embodiment of the present application, a gap of 0.03-0.1 mm is provided between the outer circle of the push rod 2 and the center hole of the transmission body 1 to ensure smooth movement of the push rod 2 relative to the transmission body 1 .

[0027] The transmission body 1 is connected to the rotating spindle of the honing machine, and the push rod 2 is connected to the propulsion device of the honing machine. The two together transmit the rotation and axial feed of the honing machine. The above combination can effectively isolate the electrolytic electric energy while well transmitting the basic function of honing.

[0028] In the embodiment of the present application, the material of the transmission body 1 and the push rod 2 is a rigid and corrosion-resistant insulating material such as nylon 1010 and polytetrafluoroethylene; during the electrolytic honing process, the transmission body 1 and the push rod 2 are non-conductive, and the current is prevented from leaking through these components, thereby protecting the safety of the equipment and operators. Avoiding the interference of the electric field in the non-processing area ensures that the current flows only between the electrode (such as the honing sleeve 8) and the part 10, thereby improving the processing efficiency and safety.

[0029] Reference Figure 1 The electrolytic honing mechanism in the embodiment of the present application includes: a feed mandrel 7, a honing sleeve 8 and an oilstone 9.

[0030] Among them, one end of the feed core shaft 7 is connected to the push rod 2 in the transmission body 1 by screw connection, and a second electrolyte flow channel 71 connected to the first electrolyte flow channel is provided in the feed core shaft 7, and the second electrolyte flow channel 71 is connected to the bottom of the blind hole of the part 10.

[0031] The honing sleeve 8 is sleeved on the feed mandrel 7, and a plurality of oilstones 9 are evenly mounted on a portion of the outer wall of the honing sleeve 8 along the axial direction of the honing sleeve 8, and each oilstone is partially protruded from the outer wall of the honing sleeve 8. Figure 2 The thickness of the oilstone 9 protruding from the honing sleeve 8 constitutes an electrolytic gap through which the electrolyte flows between the honing sleeve 8 and the wall of the blind hole.

[0032] In the embodiment of the present application, the feed mandrel 7 and the honing sleeve 8 form a conical fit on the side of the blind hole bottom close to the part 10, so that when the push rod 2 pushes the feed mandrel 7 to move toward the side close to the blind hole bottom of the part 10, the honing sleeve 8 is expanded, and the outer diameter of the multiple oilstones will be increased, thereby increasing the honing aperture of the honing electrolytic mechanism; when the push rod 2 pushes the feed mandrel 7 to move to the other side of the blind hole bottom away from the part 10, the honing sleeve 8 retracts, thereby reducing the honing aperture of the honing electrolytic mechanism.

[0033] The materials of the feed mandrel 7 and the honing sleeve 8 are both stainless steel materials, which have good electrical conductivity and corrosion resistance. In this embodiment, the material of the oilstone 9 is ordinary silicon carbide, which is an insulating abrasive.

[0034] After the electric field is applied between the electrolyte input mechanism and the part 10, the electrolyte input from the electrolyte input mechanism directly impacts the bottom of the blind hole of the part 10 through the feed mandrel 7, electrolytically polishes the bottom of the blind hole, and then electrolyzes the blind hole wall of the part 10 through the electric field formed by the gap between the honing sleeve 8 and the oil stone 9, thereby accelerating the honing efficiency; and, since the oil stone 9 uses ordinary silicon carbide, an insulating abrasive, it not only plays a role in honing the blind hole wall of the part 10, but also plays a role in stabilizing the electrolytic gap. Under the joint action of the rotation of the honing electrolytic mechanism, the reciprocating motion of the part 10, the electrolyte forming a flow field according to the specified flow channel, the part 10 connected to the anode, and the electrolyte input mechanism connected to the cathode, the electrolytic polishing of the bottom of the blind hole and the honing and electrolysis of the blind hole wall are completed.

[0035] Combination Figure 2 The honing sleeve 8 has 6 straight grooves in the circumferential direction for bonding the oilstone 9; the height difference between the oilstone 9 and the honing sleeve 8 is about 1 mm, and the height difference forms the electrolytic gap.

[0036] At the right end of the feed mandrel 7 is a cone with a full angle of 2°-3°, and the inner hole of the honing sleeve 8 is a tapered hole that matches the cone. When the push rod 2 of the honing machine is pushed to the right, it will push the feed mandrel 7 forward, and the cone part will enter the tapered hole of the honing sleeve 8, which will generate an outward radial force on the honing sleeve 8, thereby expanding the honing sleeve 8, making it closely contact with the wall of the blind hole, and realizing the honing process of the wall of the blind hole.

[0037] In addition, refer to Figure 2 Since there is an open groove 81 on the side of the honing sleeve 8 that connects the inner hole wall and the outer wall, the existence of the open groove 81 enables the honing sleeve 8 to expand elastically when subjected to radial force. The open groove 81 provides sufficient space so that the honing sleeve 8 will not be excessively constrained when expanding.

[0038] Since the part 10 is connected to the positive electrode (anode) of the electrolytic machining power source, under the action of the electric field, the metal ions at the bottom of the blind hole and the surface of the middle hole wall of the part 10 will dissolve into the electrolyte, thereby achieving material removal. Through electrolytic honing, the excess material on the inner wall of the blind hole of the part 10 can be removed, the dimensional accuracy and surface roughness of the blind hole can be improved, or tool marks can be removed.

[0039] Reference Figure 1 In the embodiment of the present application, the electrolyte input mechanism includes: an electrolyte input device 4, a connecting rod 5 and a connecting nut 6; the connecting nut 6 connects and fixes the honing sleeve 8 and the transmission body 1; the electrolyte input device 4 is sleeved on the transmission body 1 and the connecting nut 6, and the transmission body 1 and the connecting nut 6 can rotate relative to the electrolyte input device 4; the connecting rod 5 is assembled on the electrolyte input device 4 for connecting to the negative pole of the power supply; the outlet of the electrolyte input device 4 is connected to the first electrolyte flow channel.

[0040] Combination Figure 1 The electrolyte input device 4 is provided with two-stage holes, the first-stage holes with larger apertures are matched with the transmission body 1, and the other-stage holes with smaller apertures are matched with the connecting nut 6, and the two-stage holes form a small gap of 0.01-0.03mm between the transmission body 1 and the connecting nut 6. Due to the gap formed between the electrolyte input device 4 and the transmission body 1, the electrolyte input device 4 will not rotate with the transmission body 1 after being fixed on the honing machine; in addition, the small gap formed in the two-stage holes inside it can ensure that the electrolyte does not leak out while the rotation of the transmission body 1 and the connecting nut 6 is not affected.

[0041] The materials of the electrolyte input device 4, the connecting rod 5 and the connecting nut 6 are all stainless steel, which has good electrical conductivity and corrosion resistance and can achieve smooth flow of the electrolyte.

[0042] The electrolyte input device 4 and the connecting rod 5 have an interference fit of 0.01-0.03mm to ensure smooth current transmission.

[0043] The electrolyte input device 4 is provided with a threaded hole for connecting the electrolyte tube. The connecting nut 6 has a thread in the middle to achieve the connection with the transmission body 1 and the connecting honing sleeve 8.

[0044] In the embodiment of the present application, when the above blind hole honing electrolytic device is used for blind hole processing, the following steps are used: The first step is to connect the transmission body with the rotating spindle of the honing machine, connect the push rod with the propulsion device of the honing machine, fix the electrolyte input device on the honing machine, and install the parts on the honing machine; The second step is to connect the electrolyte tube to the threaded hole of the electrolyte input device 4, connect the power cathode to the power rod 5, and connect the power anode to the part 10; The third step is to introduce NaCl electrolyte, so that the electrolyte flows from the electrolyte input device 4 → the transmission body 1 → the push rod 2 → the feed mandrel 7 → the bottom of the blind hole part, and then flows outward from the gap between the blind hole wall of the part and the outer wall of the honing sleeve 8, and finally sprays out from the left end hole of the honing sleeve 8 to form a flow field; The fourth step is to start the honing machine, so that the feed mandrel 7, the honing sleeve 8 and the oil stone 9 are rotated under the driving action of the transmission body 1, and the part 10 reciprocates to start honing; The fifth step is to set the electrolysis parameters and turn on the power to form an electric field. The charged flow field impacts the bottom of the blind hole of the part to polish the bottom of the hole. At the same time, the charged flow field electrolyzes the blind hole wall when passing through the gap between the honing sleeve 8 and the blind hole wall. The honing time is set according to the size of the residual. Generally, 30 seconds to 1 minute can electrolytically hone the hole wall with a residual of 0.1mm, and polish the knife marks less than 0.1mm at the bottom of the hole.

Claims

1. A blind hole honing electrolysis device, characterized in that: include: A honing transmission mechanism, an electrolyte input mechanism and a honing electrolytic mechanism connected to a honing machine; The honing transmission mechanism is connected to the honing electrolytic mechanism and is used to drive the honing electrolytic mechanism to rotate and adjust the honing aperture of the honing electrolytic mechanism; The honing transmission mechanism and the honing electrolytic mechanism are provided with electrolyte flow channels; After the honing aperture of the honing electrolytic mechanism is adjusted to the right position, the honing transmission mechanism drives the honing electrolytic mechanism to rotate to hone the blind hole wall of the part; at the same time, after an electric field is applied between the electrolyte input mechanism and the part, under the action of the electric field, the electrolyte provided by the electrolyte input mechanism is transported to the bottom of the blind hole of the part through the electrolyte flow channel, and flows through the gap between the blind hole wall of the part and the honing electrolytic mechanism, thereby polishing the bottom and wall of the blind hole of the part.

2. The blind hole honing electrolytic device according to claim 1, characterized in that: The honing transmission mechanism includes: a transmission body, a push rod and a limit screw; The transmission body is connected to the rotating spindle of the honing machine; One end of the push rod is connected to the propulsion device of the honing machine, and the other end of the push rod is movably extended into the transmission body and connected to the honing electrolytic mechanism in the transmission body; The limit screw limits the advancement range of the push rod; The transmission body and the push rod are provided with a first electrolyte flow channel which is communicated with the outlet of the electrolyte input mechanism.

3. The blind hole honing electrolytic device according to claim 2, characterized in that: A limiting groove is arranged on the outer wall of the push rod along its axial direction, and a part of the limiting screw passes through the transmission body and extends into the limiting groove.

4. The blind hole honing electrolytic device according to claim 2, characterized in that: The electrolytic honing mechanism includes: a feed mandrel, a honing sleeve and an oilstone; One end of the feed mandrel is connected to the push rod in the transmission body, and a second electrolyte flow channel connected to the first electrolyte flow channel is provided in the feed mandrel, and the second electrolyte flow channel is connected to the bottom of the blind hole of the part; The honing sleeve is mounted on the feed mandrel; The oilstone is assembled on a part of the outer wall of the honing sleeve along the axial direction of the honing sleeve, and is partially protruded from the outer wall of the honing sleeve; The feed mandrel and the honing sleeve form a tapered fit on the side close to the bottom of the blind hole of the part; When the push rod pushes the feed core shaft to move toward the bottom of the blind hole of the part, the honing sleeve is expanded, increasing the honing hole diameter of the honing electrolytic mechanism.

5. The blind hole honing electrolytic device according to claim 4, characterized in that: An open groove connecting the inner hole wall and the outer wall of the honing sleeve is arranged on the upper side.

6. The electrolytic honing device for blind holes according to claim 4, characterized in that: The electrolyte input mechanism comprises: an electrolyte input device, an electric connecting rod and a connecting nut; The connecting nut connects and fixes the honing sleeve and the transmission body; The electrolyte input device is sleeved on the transmission body and the connecting nut, and the transmission body and the connecting nut can rotate relative to the electrolyte input device; The connecting rod is installed on the electrolyte input device and is used to connect to the negative pole of the power supply; The outlet of the electrolyte input device is connected to the first electrolyte flow channel.

7. The blind hole honing electrolytic device according to claim 2, characterized in that: The transmission body and the push rod are made of insulating materials.

8. The electrolytic honing device for blind holes according to claim 4, characterized in that: The feed mandrel and honing sleeve are made of stainless steel.

9. The blind hole honing electrolytic device according to claim 4, characterized in that: The oilstone is made of silicon carbide.

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