Piston ring internal settlement processing equipment and processing method

Abstract

The invention provides piston ring internal sinking amount machining equipment and a machining method. The piston ring internal sinking amount machining equipment comprises a base. The rotary table is mounted on the base and used for placing and rotating a workpiece to be machined; the moving component is mounted on the base and can move in the horizontal direction and the vertical direction relative to the rotary table; the heating device is installed on the moving component, located above the center of the rotary table and used for heating the inner circle face of the workpiece to be machined. According to the machining equipment and the machining method, machining of the inner sinking amount of the piston ring is achieved by adopting the principle that cooling shrinkage is conducted after heating, accurate machining of the inner sinking amount of the piston ring can be achieved by adjusting relevant parameters, operation is easy, the automation degree is high, the outer circle of the piston ring is not damaged, and machining efficiency is high. And the light tightness of other positions of the piston ring is not unqualified.

Description

Technical Field

[0001] The invention relates to the technical field of piston ring processing, and in particular to a piston ring internal weight processing device and a processing method. Background Art

[0002] The piston ring is a metal ring with an opening. It is circular in the working state and nearly elliptical in the free state. Usually, the piston ring has an internal sinking requirement to compensate for the deformation caused by thermal stress during the working process of the piston ring, so as to reduce or avoid the risk of cylinder pulling near the opening. In particular, in two-stroke engines, due to the presence of scavenging ports on the cylinder liner, the piston ring is generally designed with internal sinking to prevent the piston ring opening from colliding or scratching with the scavenging port under high temperature and high pressure, thereby causing failures such as ring breakage or cylinder pulling.

[0003] At present, the industry generally adopts cold pressing or low-point processing to achieve the required internal sinking control. Although these methods can meet basic needs, they also expose some limitations in practical applications.

[0004] For example, the Chinese invention patent with publication number CN106736877B discloses a half sleeve and a processing control method for the inner sinking amount of the piston ring opening using the same. The process of combining the half sleeve with the fine grinding of the outer circle of the piston ring is adopted. When the ring is installed, the piston ring opening is raised at the position of the half sleeve clamping inner cavity. When the outer circle is ground, the raised part of the opening is ground off, thereby achieving the purpose of the opening sinking. The invention is difficult to control the amount of the opening protruding at the half sleeve clamping inner cavity when the ring is installed, resulting in the difficulty in controlling the inner sinking amount after grinding, which is also very inconvenient in actual operation.

[0005] Another Chinese invention patent with publication number CN108772503B discloses a tool for processing the internal sinkage of a piston ring and a method of using the tool. The tool includes an operating table, on which a clamping cylinder, a work cylinder and a positioning ring gauge are fixed. A top pressure notch is provided on the circumferential surface of the positioning ring gauge, and an inner top block is fixed to the piston extension end of the clamping cylinder. After the workpiece is placed in the positioning ring gauge, the clamping cylinder is operated to press the piston ring, and the work cylinder is operated to cold bend the piston ring opening to complete the internal sinkage processing. The cold bending method used in this invention is prone to stress deformation of the piston ring, resulting in unqualified light sealing. There is rebound after cold bending, which makes it difficult to control the internal sinkage. In addition, this invention is only applicable to the internal sinkage processing of piston rings with small cylinder diameters. For the internal sinkage processing of piston rings with large cylinder diameters, there are problems such as bulky equipment and difficulty in pressing.

[0006] In summary, the internal sinking processing methods and equipment in the prior art have at least problems such as difficult processing operations and inaccurate control of the internal sinking amount. Summary of the invention

[0007] The purpose of the present invention is to overcome the defects of the prior art and provide a piston ring internal sinking processing device and a processing method, which can solve the problems of difficult internal sinking processing operation and inaccurate internal sinking control in the prior art.

[0008] In order to achieve the above purpose and other purposes, the present invention is implemented by including the following technical solutions: As a first aspect, the present invention proposes a piston ring internal weight processing equipment, including a base; a turntable, installed on the base, for placing and rotating the workpiece to be processed; a movable member, installed on the base, which can move horizontally and vertically relative to the turntable; a heating device, installed on the movable member and located above the center of the turntable, for heating the inner cylindrical surface of the workpiece to be processed.

[0009] In one embodiment, the heating device is a laser heating system, including a laser head and a protective plate; the laser head is rotatably mounted on the movable member; and the protective plate is elevatably mounted on the movable member.

[0010] In one embodiment, the moving component includes a transverse moving component and a longitudinal moving component, wherein the transverse moving component is horizontally arranged on the base; and the longitudinal moving component is vertically installed on a slider of the transverse moving component.

[0011] In one embodiment, the heating device is installed on the second slider of the longitudinal moving assembly through a bracket; the bracket includes a crossbeam and a movable frame, and the crossbeam is provided with a horizontally arranged waist-shaped groove; one end of the movable frame is movably installed in the waist-shaped groove; the protective plate is lifted and lowered at the other end of the movable frame.

[0012] In one embodiment, a distance measuring sensor is disposed at the other end of the movable frame, and the distance measuring sensor is used to detect the distance from the end surface of the workpiece to be processed and the tooling disk.

[0013] In one embodiment, the turntable includes a tooling disk and a positioning structure, and the tooling disk can rotate relative to the base; the positioning structure is arranged on the tooling disk and is used to locate the processing position and opening direction of the workpiece to be processed.

[0014] In one embodiment, the tooling disk includes a first tooling disk, a second tooling disk and a third tooling disk; the first tooling disk; the inner diameter of the second tooling disk is smaller than the outer diameter of the first tooling disk; the inner diameter of the third tooling disk is smaller than the outer diameter of the second tooling disk; the second tooling disk is positioned and assembled by cooperating with the positioning pin holes on the outer circumferential edge of the first tooling disk through the positioning pin holes on the inner circumferential edge thereof; the second tooling disk is positioned and assembled by cooperating with the positioning pin holes on the inner circumferential edge of the third tooling disk through the positioning pin holes on the outer circumferential edge thereof.

[0015] In one embodiment, the positioning structure includes a positioning block and a positioning bolt; the positioning block is installed on the tooling disk, and its center line in the length direction passes through the center of the tooling disk; the positioning bolt is symmetrically arranged on both sides of the positioning block and can move radially along the tooling disk.

[0016] In one embodiment, an industrial control screen is provided on the base.

[0017] As a second aspect, the present invention provides a method for processing piston ring internal weight, comprising the steps of:

[0018] S1. Position the workpiece to be processed on the turntable;

[0019] S2, adjusting the distance from the heat source center of the heating device to the inner circular surface of the workpiece to be processed by controlling and adjusting the position of the movable member in the horizontal and vertical directions;

[0020] S3, setting the cylinder diameter, ring height, machining arc lengths on the left and right sides of the opening of the workpiece to be processed, the rotation speed of the turntable, and the operating parameters of the heating device, and starting the heating device and the turntable to heat the inner cylindrical surface of the workpiece to be processed;

[0021] S4, cooling the inner surface of the workpiece to be processed.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention realizes the processing of the piston ring inner sinking by adopting the principle of cooling and shrinking after heating. By adjusting relevant parameters, the piston ring inner sinking can be processed more accurately. The operation is simple and the degree of automation is high. The outer circle of the piston ring is not damaged, and the optical sealing degree of other positions of the piston ring will not be unqualified.

[0024] 2. The present invention adopts a laser heating system, which can achieve precise temperature control and high processing accuracy, and can improve the processing quality of the piston ring internal weight;

[0025] 3. The protective plate is installed on the moving component to ensure that the protective plate can shield part of the laser emitted by the laser head to prevent damage to the end face of the piston ring;

[0026] 4. The crossbeam of the present invention is provided with a waist-shaped groove, in which the movable frame can move, so that the lateral and longitudinal positions of the protective plate can be adjusted, and the use requirements of piston rings with different cylinder diameters and different ring heights can be met;

[0027] 5. The distance measuring sensor of the present invention is installed on the mobile frame, and the opening and closing of the laser heating system can be controlled by detecting and judging the different distances from the distance measuring sensor to the piston ring end face, the tooling plate and the positioning block, which can significantly reduce the influence of the laser on the tooling plate and the positioning block and save energy;

[0028] 6. The present invention is provided with three kinds of tooling discs, which are applicable to the internal weight processing of piston rings with a cylinder diameter of 200mm-1000mm. The applicable piston ring cylinder diameter range is large, and the tooling disc is provided with positioning. Combined with the automatic control of the equipment, the processing efficiency can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Shown is a schematic structural diagram of a piston ring internal weight processing device according to the present invention.

[0030] Figure 2 Shown is a schematic structural diagram of a longitudinal moving component in a piston ring internal weight processing device according to the present invention.

[0031] Figure 3 Shown is a schematic structural diagram of a turntable in a piston ring internal weight processing device according to the present invention.

[0032] Figure 4 Shown is a schematic diagram of the structure of a tooling disk in a piston ring internal weight processing device according to the present invention.

[0033] Figure 5 Shown is a schematic structural diagram of a bracket and a heating device in a piston ring internal weight processing device of the present invention.

[0034] Figure 6 Shown is a rear view of a bracket and a heating device in a piston ring internal weight processing device of the present invention.

[0035] In the figure: 1, base; 2, moving member; 21, transverse moving assembly; 211, first guide rail; 212, first slider; 213, first driving device 213; 22, longitudinal moving assembly; 221, support; 222, second guide rail; 223, second slider; 224, second driving device; 3, turntable; 31, base; 32, tooling tray; 321, first tooling tray; 322, second tooling tray; 323, third tooling tray; 33 1. T-slot; 332. Positioning block; 333. Positioning bolt; 34. Bolt; 35. Positioning pin hole; 36. Fixing screw hole; 4. Heating device; 41. Laser head; 42. Protective plate; 5. Bracket; 51. Crossbeam; 511. Waist-shaped groove; 52. Vertical beam; 521. Arc waist hole; 522. Positioning hole; 53. Flange; 54. Mobile rack; 541. Adjusting bolt; 542. Distance sensor; 6. Industrial control screen; 61. Hanging bolt. DETAILED DESCRIPTION

[0036] See also Figure 1-Figure 6 The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0037] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0038] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meaning as understood by a person having ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the present invention do not indicate a quantitative limitation, but are only used to indicate the existence of at least one. The words "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The serial numbers for the components in this specification, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" mentioned in the present invention, unless otherwise specified, includes direct and indirect connections.

[0039] In order to avoid confusion with the present invention, some technical features known in the art are not described.

[0040] Embodiment 1:

[0041] like Figure 1 As shown, this embodiment provides a piston ring underweight processing device, comprising a base 1, a moving member 2, a turntable 3 and a heating device 4. The moving member 2 and the turntable 3 can be mounted on the base 1 by bolts, and the moving member 2 can move in both horizontal and vertical directions relative to the turntable 3; the heating device 4 is mounted on the moving member 2 and is located above the center of the turntable 3, and can move with the moving member 2, and is used to heat the inner cylindrical surface of the workpiece to be processed placed on the turntable 3.

[0042] Please combine Figure 2The moving member 2 includes a transverse moving component 21 and a longitudinal moving component 22. The transverse moving component 21 may be a linear module horizontally arranged on the base 1; the longitudinal moving component 22 may be a linear module vertically installed on the transverse moving component 21. Specifically, the transverse moving component 21 includes a first guide rail 211, a first slider 212 and a first driving device 213. The first slider 212 is slidably installed on the first guide rail 211. The first driving device 213, such as a motor, is used to drive the first slider 212 to slide on the first guide rail 211. The longitudinal moving component 22 includes a support 221, a second guide rail 222, a second slider 223 and a second driving device 224. The support 221 is fixedly connected to the first slider 212 by bolts; the second guide rail 222 is installed on the support 221 by bolts; the second slider 223 is slidably installed on the second guide rail 222; the second driving device 224, such as a motor, is used to drive the second slider 223 to slide on the second guide rail 222. The longitudinal moving component 22 as a whole can move horizontally together with the first slider 212 of the transverse moving component 21 , and the longitudinal moving component 22 can be adjusted to a suitable position in the horizontal direction according to actual needs.

[0043] It should be noted that, in this embodiment, the movable component 2 uses two linear modules to achieve position adjustment in both horizontal and vertical directions; in other embodiments, the movable component 2 may also use a component such as a robotic arm that can simultaneously perform position adjustment in both horizontal and vertical directions.

[0044] like Figure 3 As shown, the turntable 3 includes a base 31, a tooling disc 32 and a positioning structure. The base 31 is mounted on the base 1; the tooling disc 32 is rotatably mounted on the base 31; the positioning structure is arranged on the tooling disc 32 to locate the processing position and opening direction of the workpiece to be processed. The tooling disc 32 includes 3 specifications, with outer diameters of 350mm, 700mm and 1000mm respectively, which can adapt to the processing of piston rings of various sizes on the market.

[0045] Specifically, the positioning structure includes two T-slots 331, a positioning block 332 and a positioning bolt 333. The two T-slots 331 are radially opened on the tooling disk 32. The positioning block 332 is in the shape of an elongated strip, mounted on the tooling disk 32 by bolts 34, and located on the symmetry axis of the two T-slots, and is used to locate the opening direction of the workpiece to be processed. The positioning block 332 is arranged parallel to the first guide rail 211, and its center line in the length direction passes through the center of the tooling disk 32. The positioning bolt 333 is slidably installed in the T-slot 331, and is used for rapid positioning of the workpiece to be processed. The position of the positioning bolt 333 can be adjusted along the radial direction of the tooling disk 32 according to the size of the piston ring cylinder diameter, so as to ensure that the center of the workpiece is basically coincident with the center of the tooling disk 32, which is convenient for the processing of the internal sinking amount and can greatly improve the processing quality and processing efficiency.

[0046] like Figure 4 Please combine Figure 3 In order to reduce the difficulty of replacing and installing the tooling plate 32, the tooling plate 32 can be designed as an assembleable structure. Specifically, the tooling plate 32 includes a first tooling plate 321, a second tooling plate 322 and a third tooling plate 323. The outer diameter of the first tooling plate 321 is 350 mm. In addition to the positioning structure, positioning pin holes 35 are also provided on the first tooling plate 321. At least two positioning pin holes 35 are provided on the outer circumferential edge of the first tooling plate 321. In order to facilitate the assembly of the second tooling plate 322, fixing screw holes 36 can also be provided on its outer circumferential edge. The inner diameter of the second tooling disk 322 is slightly smaller than 350 mm and the outer diameter is 700 mm. In addition to the positioning structure, at least two positioning pin holes 35 are respectively provided on the inner circumferential edge and the outer circumferential edge thereof; through the positioning pin holes 35 on the inner circumferential edges of the first tooling disk 321 and the second tooling disk 322, it can be ensured that the positioning structure of the second tooling disk 322 and the positioning structure of the first tooling disk 321 are on the same axis; in order to facilitate assembly with the first tooling disk 321 and the third tooling disk 323 respectively, fixing screw holes 36 can also be respectively provided on the inner circumferential edge and the outer circumferential edge thereof. The inner diameter of the third tooling disk 323 is slightly smaller than 700 mm, and the outer diameter is 1000 mm. In addition to the positioning structure, at least two positioning pin holes 35 are provided on the inner circumferential edge for cooperating with the positioning pin holes 35 on the outer circumferential edge of the second tooling disk 322 for positioning, so as to ensure that the positioning structure of the third tooling disk 323 and the positioning structure of the second tooling disk 322 are on the same axis; in order to facilitate assembly with the second tooling disk 322, fixing screw holes 36 can also be provided on its inner circumferential edge.

[0047] like Figure 5As shown, the heating device 4 can be a laser heating system, an electromagnetic induction heating system, an electric heating system, etc. In this embodiment, the heating device 4 adopts a laser heating system. It includes a laser head 41 and a protective plate 42. The heating device 4 is installed on the second slider 223 through a bracket 5.

[0048] The bracket 5 includes a crossbeam 51, a vertical beam 52, a flange 53 and a movable frame 54. One end of the crossbeam 51 is fixedly mounted on the second slider 223; the upper end of the vertical beam 52 is fixedly mounted on the other end of the crossbeam 51; one end of the flange 53 is rotatably mounted on the lower end of the vertical beam 52; the other end of the flange 53 is used to connect the laser head 41. By rotating the flange 53, the angle of the laser head 41 can be adjusted to ensure that the laser is in the required processing area. A horizontally arranged waist-shaped groove 511 is provided on the crossbeam 51; one end of the movable frame 54 is movably mounted in the waist-shaped groove 511 by bolts, and the movable frame 54 can be moved in the waist-shaped groove 511 by adjusting the bolts, so as to adjust the lateral position of the movable frame 54 to a suitable position to meet the processing requirements. The other end of the mobile frame 54 is provided with an adjusting bolt 541 and a distance sensor 542. By adjusting the tightness of the adjusting bolt 541, the protective plate 42 can be lifted and lowered in the longitudinal direction to a suitable position and then locked to ensure that the protective plate 42 can shield part of the laser emitted by the laser head 41 to prevent damage to the piston ring end face. The distance sensor 542 is used to detect the distance from the end face of the piston ring, the tooling plate 32 and the positioning block 332, and the position of the laser processing is determined according to the different distances detected, so as to ensure that when the laser is in the processing position, the laser heating system is controlled to be in the on state, and when the laser is in the non-processing position, the laser heating system is controlled to be in the off state, which can significantly reduce the impact of the laser on the tooling plate 32 and the positioning block 332 and save energy.

[0049] Please combine Figure 5 and Figure 6 The vertical beam 52 is provided with an arc-shaped waist hole 521 and a positioning hole 522; the arc-shaped waist hole 521 is arranged outside the positioning hole 522. The flange 53 is provided with a positioning step, which cooperates with the positioning hole 522 of the vertical beam 52; the flange 53 is connected to the arc-shaped waist hole 521 of the vertical beam 52 by bolts, and can rotate around the positioning hole of the vertical beam 52 to adjust the angle of the laser head.

[0050] Please review Figure 1 In order to facilitate the setting and adjustment of the piston ring cylinder diameter, ring height, free opening, turntable speed, processing arc length on the left and right sides of the opening and related parameters of the heating device 4, an industrial control panel 6 can be set on the base 1, and the industrial control panel 6 can be hung on the base 1 by two hanging bolts 61.

[0051] Embodiment 2:

[0052] This embodiment provides a method for processing the inner sinking of a piston ring. Taking the inner sinking processing of a piston ring with a cylinder diameter of 200 mm-340 mm as an example, the processing equipment of the above-mentioned embodiment 1 is used to perform the inner sinking processing. The processing method includes the following steps:

[0053] S1, placing the workpiece to be processed on the tooling plate 32, and making the outer circle of the workpiece to be processed close to the two positioning bolts 33, and the opening close to the positioning block 32;

[0054] S2, by controlling and adjusting the lateral moving assembly 21 and the longitudinal moving assembly 22, the heating device 4 is placed in a suitable position; that is, the distance between the laser head 41 and the inner surface of the workpiece to be processed is adjusted, so as to achieve laser focusing for heating;

[0055] S3. Set the piston ring cylinder diameter, ring height, free opening, turntable rotation speed, processing arc length on the left and right sides of the opening, and laser heating system related parameters on the industrial control screen 6; specifically, the processing parameters can be: spot 30mm, focal length 330mm, linear speed 2-10mm / s, power 1000W-3500W; start the laser head 41 and turntable 3 to heat the inner cylindrical surface of the workpiece to be processed;

[0056] S4. Then, air cooling is used to complete the processing of the piston ring internal sinking.

[0057] By adjusting the relevant parameters of the laser heating system, the rotation speed of the turntable, and the processing arc length on the left and right sides of the opening, the required piston ring sinking value can be adjusted.

[0058] Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value. The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A piston ring internal weight processing equipment, characterized in that: include: Pedestal; A turntable, mounted on the base, for placing and rotating the workpiece to be processed; A moving member, mounted on the base, capable of moving in both horizontal and vertical directions relative to the turntable; A heating device is installed on the moving member and is located above the center of the turntable, and is used for heating the inner circular surface of the workpiece to be processed.

2. The piston ring internal weight processing equipment according to claim 1, characterized in that: The heating device is a laser heating system, comprising a laser head and a protective plate; the laser head is rotatably mounted on the moving component; the protective plate is lifted and lowered on the moving component.

3. The piston ring internal weight processing equipment according to claim 2, characterized in that: The moving component comprises a transverse moving component and a longitudinal moving component. The transverse moving component is horizontally arranged on the base; and the longitudinal moving component is vertically installed on a slider of the transverse moving component.

4. The piston ring internal weight processing equipment according to claim 3, characterized in that: The heating device is installed on the second slider of the longitudinal moving assembly through a bracket; the bracket includes a crossbeam and a moving frame, and the crossbeam is provided with a horizontal waist-shaped groove; one end of the moving frame is movably installed in the waist-shaped groove; the protective plate is lifted and lowered at the other end of the moving frame.

5. The piston ring underweight processing equipment according to claim 4, characterized in that: A distance measuring sensor is arranged at the other end of the moving frame, and the distance measuring sensor is used to detect the distance from the end face of the workpiece to be processed and the tooling plate.

6. The piston ring internal weight processing equipment according to claim 1, characterized in that: The turntable comprises a tooling disk and a positioning structure. The tooling disk can rotate relative to the base. The positioning structure is arranged on the tooling disk and is used to locate the processing position and opening direction of the workpiece to be processed.

7. The piston ring underweight processing equipment according to claim 6, characterized in that: The tooling disk includes a first tooling disk, a second tooling disk and a third tooling disk; the first tooling disk; the inner diameter of the second tooling disk is smaller than the outer diameter of the first tooling disk; the inner diameter of the third tooling disk is smaller than the outer diameter of the second tooling disk; the second tooling disk is positioned and assembled by cooperating with the positioning pin holes on the outer circumferential edge of the first tooling disk through the positioning pin holes on its inner circumferential edge; the second tooling disk is positioned and assembled by cooperating with the positioning pin holes on the inner circumferential edge of the third tooling disk through the positioning pin holes on its outer circumferential edge.

8. The piston ring internal weight processing equipment according to claim 6 or 7, characterized in that: The positioning structure includes a positioning block and a positioning bolt; the positioning block is installed on the tooling disk, and its center line in the length direction passes through the center of the tooling disk; the positioning bolts are symmetrically arranged on both sides of the positioning block and can move radially along the tooling disk.

9. The piston ring internal weight processing equipment according to claim 1, characterized in that: An industrial control screen is arranged on the base.

10. A method for processing piston ring internal weight, characterized in that: Includes steps: S1. Position the workpiece to be processed on the turntable; S2, adjusting the distance from the heat source center of the heating device to the inner circular surface of the workpiece to be processed by controlling and adjusting the position of the movable member in the horizontal and vertical directions; S3, setting the cylinder diameter, ring height, machining arc lengths on the left and right sides of the opening of the workpiece to be processed, the rotation speed of the turntable, and the operating parameters of the heating device, and starting the heating device and the turntable to heat the inner cylindrical surface of the workpiece to be processed; S4, cooling the inner surface of the workpiece to be processed.

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