Electrically-assisted turning finish machining device for side face of piston ring groove

Abstract

The utility model discloses an electric auxiliary turning finish machining device for the side face of a piston ring groove. The electric auxiliary turning finish machining device comprises a left connecting disc, a left rotating mechanism, a left rolling bearing, a left conducting ring, a right rotating mechanism, a right rolling bearing, a right conducting ring, a right connecting disc and a power source. The left conducting ring and the right conducting ring are connected with a power source through wires so that the piston can be powered up when the side face of the piston ring groove is subjected to turning finish machining, and the left conducting ring and the right conducting ring are kept still when the main shaft rotates. Compared with the prior art, the electrically-assisted turning finish machining device for the side face of the piston ring groove adopts electrically-assisted turning finish machining to replace grinding machining, the manufacturability is better, rotation electric conduction is achieved, noise is low, heating is not prone to occurring, the service life is long, and the electrically-assisted turning finish machining device is suitable for large-scale long-time continuous operation.

Description

Technical Field

[0001] The present application relates to the technical field of piston processing, and in particular to an electrically assisted turning finishing device for a piston ring groove side surface. Background Art

[0002] Steel pistons work under conditions of high temperature, high pressure, high speed and poor lubrication. There is constant friction and wear between the piston ring groove and the piston ring moving pair. When the side of the ring groove wears to a certain extent, it causes gas blowby in the piston ring groove. In order to improve the wear resistance of the ring groove, the side of the piston ring groove is partially quenched, and the hardness after quenching is 52-60HRC.

[0003] CN 116083702 A discloses a method for machining a diesel engine steel piston ring groove, comprising the following steps: pre-machining preparation; quenching processing; tempering processing; grinding processing: putting the tempered semi-finished steel piston ring groove into a ring groove grinder for grinding processing to obtain a finished steel piston ring groove.

[0004] CN 214722564 U discloses a set of high-frequency pulse current assisted turning tooling, comprising a spindle end sleeve device, a pulse power supply, and a tapered shank chuck device. The spindle end sleeve device is connected to a three-jaw chuck of a lathe through a large insulating sleeve, the large insulating sleeve is sleeved outside the spindle end sleeve device, the tapered shank chuck device is connected to a tailstock end sleeve through a small insulating sleeve, the small insulating sleeve is sleeved outside the tapered shank chuck device, one end of the workpiece is fixed by the spindle end sleeve device, and the other end is fixed by the tapered shank chuck device, brushes are installed on the spindle sleeve device and the tapered shank chuck device, one end of the pulse power supply is electrically connected to the brush of the spindle sleeve device, and the other end is electrically connected to the brush of the tapered shank chuck device.

[0005] The disadvantages of the solution disclosed in patent application CN 116083702 A are that it uses high-frequency quenching, which has a long process flow, large deformation of the workpiece, and requires tempering and grinding. The hardness of high-frequency induction quenching is uneven, the hardness is low, the grinding efficiency is low, the manufacturing cycle of the forming grinding head is long, and the switching is inconvenient.

[0006] The disadvantage of the solution disclosed in patent CN 214722564 U is that the brushes used are sliding friction, noisy, easy to heat up, short life, etc., and are not suitable for large-scale long-term continuous operation.

[0007] How to achieve electric-assisted turning finishing of the piston ring groove side with low noise and low heat generation is a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0008] In order to solve the above technical problems, the purpose of the utility model is to provide a piston ring groove side electric-assisted turning finishing device with low noise and low heat generation.

[0009] The technical solution provided by the utility model is as follows:

[0010] A piston ring groove side electric-assisted turning finishing device comprises a left connecting plate, a left rotating mechanism, a left rolling bearing, a left conductive ring, a right rotating mechanism, a right rolling bearing, a right conductive ring, a right connecting plate and a power supply; the left connecting plate is used to connect to the main shaft of a machine tool, one end of the left rotating mechanism is connected and fixed to the left connecting plate so that the left rotating mechanism rotates synchronously with the main shaft, and the other end is used to connect and fix to the piston stop end, the inner ring of the left rolling bearing is sleeved and fixed on the left rotating mechanism, and the left conductive ring is sleeved and fixed on the outer ring of the left rolling bearing so that the left conductive ring The ring remains stationary when the spindle rotates; the right connecting disk is used to connect the movable center of the machine tool, one end of the right rotating mechanism is connected and fixed to the right connecting disk so that the right rotating mechanism rotates synchronously with the spindle, and the other end is used to be connected and fixed to the combustion chamber end of the piston, the right rolling bearing inner ring is sleeved and fixed on the right rotating mechanism, and the right conductive ring is sleeved and fixed on the outer ring of the right rolling bearing so that the right conductive ring remains stationary when the spindle rotates; the left conductive ring and the right conductive ring are both connected to the power supply through wires to power the piston when turning and finishing the side of the piston ring groove.

[0011] Preferably, the left rotating mechanism includes a detachable left core shaft and a stop plate, the inner ring of the left rolling bearing is sleeved and fixed on the left core shaft, and the stop plate is used to be connected and fixed to the stop end of the piston; the right rotating mechanism includes a detachable right core shaft and a pressure cover, the inner ring of the right rolling bearing is sleeved and fixed on the right core shaft, and the pressure cover is used to be connected and fixed to the combustion chamber end of the piston.

[0012] Preferably, the left core shaft and the stop plate, as well as the right core shaft and the pressure cover are detachably fixed by screws.

[0013] Preferably, the left-rotating mechanism is insulated from the main shaft, and the right-rotating mechanism is insulated from the top.

[0014] Preferably, a left insulating disk is provided between the left connecting disk and the left core shaft for insulating the left rotating mechanism from the left connecting disk and thereby insulating the left rotating mechanism from the main shaft; a right insulating disk is provided between the right connecting disk and the right core shaft for insulating the right rotating mechanism from the right connecting disk and thereby insulating the right rotating mechanism from the top shaft.

[0015] Preferably, the left insulating disk and the left core shaft, as well as the right insulating disk and the right core shaft, are detachably fixed by screws.

[0016] Preferably, the left insulating disk and the stop disk are connected and fixed to the same screw hole of the left core shaft by screws, and the right insulating disk and the pressure cover are connected and fixed to the same screw hole of the right core shaft by screws.

[0017] Preferably, the left connecting plate is connected to the machine tool spindle by screws passing through the left insulating plate and the left connecting plate is fixed to the spindle, and the right connecting plate is connected to the machine tool movable center by the right connecting plate being sleeved on the movable center, and the right insulating plate and the right connecting plate are fixed by screws.

[0018] Preferably, a left support ring is provided between the inner ring of the left rolling bearing and the left insulating disk, and a right support ring is provided between the inner ring of the right rolling bearing and the right insulating disk.

[0019] Preferably, the power supply is a digital pulse power supply.

[0020] Compared with the prior art, the utility model discloses an electrically assisted turning finishing device for the side of a piston ring groove, by arranging a left connecting plate, a left rotating mechanism, a left rolling bearing, a left conductive ring, a right rotating mechanism, a right rolling bearing, a right conductive ring, a right connecting plate, and a power supply. Both the left conductive ring and the right conductive ring are connected to the power supply through wires to energize the piston when turning and finishing the side of the piston ring groove, and the left conductive ring and the right conductive ring remain stationary when the main shaft rotates, thereby adopting electrically assisted turning finishing to replace grinding, with better processability, and realizing rotational conduction, low noise, low heat generation, and long service life, and is suitable for large-scale continuous operation for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic structural diagram of the electric-assisted turning finishing device for the side of the piston ring groove according to an embodiment of the utility model.

[0023] Figure numerals: 2-spindle, 3-left connecting disk, 4-left insulating disk, 5-left supporting ring, 6-left conductive ring, 7-left rolling bearing, 8-left mandrel, 9-stop disk, 10-piston, 11-ring groove, 12-pressure cover, 13-right mandrel, 14-right rolling bearing, 15-right conductive ring, 16-right supporting ring, 17-right insulating disk, 18-right connecting disk, 19-bolt, 20-movable center, 21-wire, 22-power supply DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0029] like Figure 1 As shown, an embodiment of the utility model provides an electrically assisted turning finishing device for the side of a piston ring groove, comprising a left connecting plate 3, a left rotating mechanism, a left rolling bearing 7, a left conductive ring 6, a right rotating mechanism, a right rolling bearing 14, a right conductive ring 15, a right connecting plate 18, and a power supply 22 (a digital pulse power supply is used in this embodiment).

[0030] In this embodiment, the left-rotating mechanism includes a detachably fixed left spindle 8 and a stop plate 9, the inner ring of the left rolling bearing 7 is sleeved and fixed on the left spindle 8, and the stop plate 9 is used to be connected and fixed with the stop end of the piston 10. The right-rotating mechanism includes a detachably fixed right spindle 13 and a pressure cover 12, the inner ring of the right rolling bearing 14 is sleeved and fixed on the right spindle 13, and the pressure cover 12 is used to be connected and fixed with the combustion chamber end of the piston 10. The left spindle 8 and the stop plate 9, as well as the right spindle 13 and the pressure cover 12 are detachably fixed by screws 19. Of course, in other embodiments, the left-rotating mechanism and the right-rotating mechanism may also adopt other structures, such as the left spindle and the stop plate, and the right spindle and the pressure cover are designed as one piece.

[0031] In this embodiment, a left insulating disk 4 is provided between the left connecting disk 3 and the left mandrel 8 for insulating the left rotating mechanism from the left connecting disk and thus insulating the left rotating mechanism from the main shaft. A right insulating disk 17 is provided between the right connecting disk 18 and the right mandrel 13 for insulating the right rotating mechanism from the right connecting disk and thus insulating the right rotating mechanism from the top. Of course, in other embodiments, the insulation between the left / right rotating mechanism and the left / right connecting disk can also adopt other structures, such as using high-performance engineering plastics for the left connecting disk and the right connecting disk, which can simplify the device. However, the split structure is convenient for processing. The left rotating mechanism and the main shaft and the right rotating mechanism and the top can also be not insulated.

[0032] In this embodiment, the left insulating disk 4 and the left mandrel 8, as well as the right insulating disk 17 and the right mandrel 13, are detachably fixed by screws 19. The left insulating disk 4 and the stopper disk 9 are connected and fixed to the same screw hole of the left mandrel 8 by screws 19, and the right insulating disk 17 and the gland 12 are connected and fixed to the same screw hole of the right mandrel 13 by screws 19. The left connecting disk 3 is connected to the machine tool spindle 2 by screws 19 passing through the left insulating disk 4 and the left connecting disk 3 and fixed to the spindle 2, and the right connecting disk 18 is connected to the machine tool movable center 20 by the right connecting disk 18 being sleeved on the movable center 20, and the right insulating disk 17 and the right connecting disk 18 are fixed by screws 19.

[0033] In this embodiment, a left support ring 5 is provided between the inner ring of the left rolling bearing 7 and the left insulating disk 4 , and a right support ring 16 is provided between the inner ring of the right rolling bearing 14 and the right insulating disk 17 to support the left rolling bearing 7 and the right rolling bearing 14 .

[0034] In this way, the main shaft 2, the left connecting plate 3, the left insulating plate 4, the left supporting ring 5, the left rolling bearing 7, the left mandrel 8, the stop plate 9, the piston 10, the pressure cover 12, the right mandrel 13, the right rolling bearing 14, the right supporting ring 16, the right insulating plate 17, the right connecting plate 18, and the movable top 20 are connected in sequence and rotate synchronously with the main shaft 2; the left conductive ring 6 is sleeved on the outer ring of the left rolling bearing 7 and remains stationary, and the inner ring of the left rolling bearing 7 rotates synchronously with the main shaft 2; the right conductive ring 15 is sleeved on the outer ring of the right rolling bearing 14 and remains stationary, and the right rolling bearing 1 4 The inner ring rotates synchronously with the main shaft 2; the main shaft 2, the left connecting plate 3, the left insulating plate 4, the left core shaft 8, and the stop plate 9 are connected as a whole by screws 19; the pressure cover 12, the right core shaft 13, the right insulating plate 17, and the right connecting plate 18 are connected as a whole by screws 19, and then sleeved on the movable top 20; the stop end of the piston 10 is sleeved on the stop plate 9, and the combustion chamber end of the piston 10 is sleeved on the pressure cover 12, and the main shaft 2 of the machine tool 1 rotates, driving the piston 10 to rotate; the left conductive ring 6 and the right conductive ring 15 are connected to the positive and negative poles of the power supply 22 through the wire 21.

[0035] The machining process of the ring groove 11 of the piston 10 is as follows: rough machining of the ring groove - laser quenching of the ring groove side - electric-assisted finishing of the ring groove side. The allowance for the rough machining of the ring groove side is 0.1-0.2mm; the laser quenching layer depth of the ring groove side is 0.5-1.5mm, and the quenching hardness is 52-60HRC. When the ring groove 11 is trapezoidal, the electric-assisted finishing of the ring groove side adopts the tool to process the upper and lower sides respectively; when the ring groove 11 is rectangular, the electric-assisted finishing of the ring groove side adopts the forming tool to process, and the upper and lower sides are processed at one time.

[0036] Compared with the prior art, the electric-assisted turning finishing device for piston ring groove side of the utility model has the following advantages:

[0037] 1. The electric-assisted turning finishing of the ring groove side replaces the grinding process, which has better processability;

[0038] 2. The conductive ring, rolling bearing and wire structure are used to realize the electric-assisted machining conduction, which has a simple structure and good equipment adaptability. It also realizes the rotation conduction. The conductive ring is sleeved on the outer ring of the rolling bearing and remains stationary, and the inner ring of the rolling bearing rotates synchronously with the main shaft. It has low noise, is not easy to heat up, and has a long service life. It is suitable for large-scale and long-term continuous operation.

[0039] 3. The power-assisted turning is adopted. When the pulse power is loaded, the hardness of the quenching layer is reduced, and the turning performance is improved. When the power is off, the hardness of the quenching side of the ring groove is restored;

[0040] 4. Laser ring groove quenching is adopted, the deformation of the ring groove is small, the quenching layer is deeper, and the quenching hardness is more uniform;

[0041] 5. The stopper plate and the gland are designed as split parts, which allows for quick change of different products and is economical.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston ring groove side electric-assisted turning finishing device, characterized in that: It includes a left connecting disk, a left rotating mechanism, a left rolling bearing, a left conductive ring, a right rotating mechanism, a right rolling bearing, a right conductive ring, a right connecting disk, and a power supply; the left connecting disk is used to connect the main shaft of the machine tool, one end of the left rotating mechanism is connected and fixed with the left connecting disk so that the left rotating mechanism rotates synchronously with the main shaft, and the other end is used to connect and fix with the piston stop end, the inner ring of the left rolling bearing is sleeved and fixed on the left rotating mechanism, and the left conductive ring is sleeved and fixed on the outer ring of the left rolling bearing so that the left conductive ring remains stationary when the main shaft rotates; the right connecting disk is used to connect the movable top of the machine tool, one end of the right rotating mechanism is connected and fixed with the right connecting disk so that the right rotating mechanism rotates synchronously with the main shaft, and the other end is used to connect and fix with the combustion chamber end of the piston, the inner ring of the right rolling bearing is sleeved and fixed on the right rotating mechanism, and the right conductive ring is sleeved and fixed on the outer ring of the right rolling bearing so that the right conductive ring remains stationary when the main shaft rotates; the left conductive ring and the right conductive ring are both connected to the power supply through a wire to power the piston when turning and finishing the side of the piston ring groove.

2. The piston ring groove side electrically assisted turning finishing device according to claim 1, characterized in that: The left rotating mechanism includes a detachable left core shaft and a stop plate, the inner ring of the left rolling bearing is sleeved and fixed on the left core shaft, and the stop plate is used to be connected and fixed to the stop end of the piston; the right rotating mechanism includes a detachable right core shaft and a pressure cover, the inner ring of the right rolling bearing is sleeved and fixed on the right core shaft, and the pressure cover is used to be connected and fixed to the combustion chamber end of the piston.

3. The piston ring groove side electrically assisted turning finishing device according to claim 2, characterized in that: The left core shaft and the stop plate as well as the right core shaft and the pressure cover are detachably fixed by screws.

4. The piston ring groove side electrically assisted turning finishing device according to claim 2, characterized in that: The left-hand rotating mechanism is insulated from the main shaft, and the right-hand rotating mechanism is insulated from the top.

5. The piston ring groove side electrically assisted turning finishing device according to claim 4, characterized in that: A left insulating disk is provided between the left connecting disk and the left core shaft for insulating the left rotating mechanism from the left connecting disk and thereby insulating the left rotating mechanism from the main shaft; a right insulating disk is provided between the right connecting disk and the right core shaft for insulating the right rotating mechanism from the right connecting disk and thereby insulating the right rotating mechanism from the top.

6. The piston ring groove side electrically assisted turning finishing device according to claim 5, characterized in that: The left insulating disk and the left core shaft as well as the right insulating disk and the right core shaft are detachably fixed by screws.

7. The piston ring groove side electrically assisted turning finishing device according to claim 6, characterized in that: The left insulating disk and the stop disk are connected and fixed to the same screw hole of the left core shaft through screws, and the right insulating disk and the pressure cover are connected and fixed to the same screw hole of the right core shaft through screws.

8. The piston ring groove side electrically assisted turning finishing device according to claim 5, characterized in that: The left connecting plate is connected to the main shaft of the machine tool by screws passing through the left insulating plate and the left connecting plate and fixed on the main shaft. The right connecting plate is connected to the movable center of the machine tool by the right connecting plate being sleeved on the movable center, and the right insulating plate and the right connecting plate are fixed by screws.

9. The piston ring groove side electrically assisted turning finishing device according to claim 5, characterized in that: A left supporting ring is arranged between the inner ring of the left rolling bearing and the left insulating disk, and a right supporting ring is arranged between the inner ring of the right rolling bearing and the right insulating disk.

10. The piston ring groove side electrically assisted turning finishing device according to claim 1, characterized in that: The power supply is a digital pulse power supply.

Images