A valve stem end face surfacing device

Abstract

The utility model relates to a valve stem end face surfacing device, including a device body, a welding device and a valve bearing device, the device body is provided with a welding table for placing valves, the angle between the central axis of the welding table and the vertical direction is more than 15°, the welding table is provided with a movable top for positioning the valve, the valve bearing device includes a fixed frame, two symmetrically arranged mounting plates and a bearing wheel rotatably mounted on the mounting plate, the fixed frame is fixedly mounted on the device body, the mounting plate is adjustably mounted on the fixed frame, the axis of the bearing wheel is parallel to the central axis of the welding table, and the distance between the bearing wheels on the two mounting plates can be adjusted in the direction of approaching or moving away from each other. The main purpose of the utility model is to provide a valve stem end face surfacing device with reasonable structure, stable operation, reduced manufacturing and use costs, and stable welding effect.

Description

Technical Field

[0001] The utility model relates to a surfacing device, in particular to a valve stem end surface surfacing device. Background Art

[0002] During the operation of the engine, the valve reciprocates at high speed in a high temperature environment. The valve disc cone surface is subjected to high-frequency reciprocating impacts and high-speed airflow scouring in a high temperature environment. Therefore, there are high requirements for the wear resistance and high temperature resistance of the valve disc cone surface. In order to improve this performance, plasma welding technology is generally used during valve processing to build up cobalt-based alloy on the valve disc cone surface to enhance the wear resistance and high temperature resistance of the valve cone surface.

[0003] In the prior art, the patent with publication number CN204183093U discloses a valve stem end face surfacing device, including a cross welding manipulator, a welding gun is provided at one end of the cross arm of the cross welding manipulator, a welding positioning mechanism is provided below the welding gun, and the welding positioning mechanism includes a welding turntable located at the bottom, and a rotating mechanism, an adjusting mechanism and a clamping mechanism are provided above the welding turntable in sequence. Although this technical solution is easy to operate and has stable performance, the uniform and stable rotation of the valve is achieved through the joint action of the friction wheel and the clamping wheel in this technical solution, and the structure is relatively complex. In addition, the clamping wheel is driven and controlled by a cylinder, and the positioning accuracy is insufficient, and the production cost is also high. In addition, the welding turntable in this technical solution is a flat table-like structure, and the dust generated by welding is easily accumulated on the table top of the welding turntable. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide a valve stem end face cladding device with reasonable structure, stable operation, reduced manufacturing and use costs and stable welding effect.

[0005] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] A valve stem end face surfacing device comprises an equipment body, a welding device and a valve bearing device, wherein the equipment body is provided with a welding table for placing the valve, the angle between the central axis of the welding table and the vertical direction is greater than 15°, the welding table is provided with a movable center pin for positioning the valve, the valve bearing device comprises a fixed frame, two symmetrically arranged mounting plates and a bearing wheel rotatably mounted on the mounting plate, the fixed frame is fixedly mounted on the equipment body, the mounting plate is adjustably mounted on the fixed frame, the axis of the bearing wheel is parallel to the central axis of the welding table, and the distance between the bearing wheels on the two mounting plates can be adjusted in a direction of approaching or moving away from each other.

[0007] Furthermore, both ends of the load-bearing wheel are rotatably connected to the telescopic rod, and the telescopic rod includes an inner sleeve rod and an outer sleeve. One end of the inner sleeve rod is fixedly connected to the mounting plate, and the other end is slidably sleeved in the outer sleeve. An elastic member is connected between the inner sleeve rod and the outer sleeve. When the valve stem is pressed against the load-bearing wheel, the outer sleeve overcomes the elastic force of the elastic member and abuts against the mounting plate.

[0008] Furthermore, the mounting plate comprises a mounting portion and a connecting portion, the load-bearing wheel is mounted on the mounting portion, and the connecting portion is mounted on the fixing frame by adjusting a limiting assembly.

[0009] Furthermore, the adjustment limit assembly includes a limit screw rod 1, and carrier plates are symmetrically connected on both sides of the fixed frame. The carrier plates and the fixed frame are distributed in parallel and at intervals. The mounting portion is located between the carrier plates and the fixed frame. The limit screw rod 1 can be rotatably mounted on the carrier plate, and one end of the limit screw rod 1 is threaded through the mounting portion and abuts against the fixed frame.

[0010] Furthermore, protruding columns are symmetrically arranged on both sides of the fixing frame, the axes of the protruding columns are parallel to the axis of the limiting screw rod, and correspondingly, the mounting portion is provided with a clamping hole, and the mounting portion can be freely slidably sleeved on the outer side of the protruding column through the clamping hole.

[0011] Furthermore, the angle between the central axis of the welding table and the vertical direction is 15°-60°.

[0012] Furthermore, a plurality of inclined annular grooves are provided on the upper surface of the welding platform from the inside to the outside, and the bottom surface of the inclined annular grooves is a slope that gradually slopes downward from the inside to the outside.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, the welding table and the load-bearing wheel are arranged at an angle, and the valve stem can rely on its own gravity to achieve stable contact with the load-bearing wheel, thereby simplifying the support structure of the valve stem; at the same time, the load-bearing wheel is installed on an adjustable mounting plate, which can adapt to valve stems of different sizes, expand the scope of application, and improve practicality; a plurality of inclined annular grooves are provided on the welding table to guide excess dust away from the valve to avoid dust accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a valve stem end face cladding device according to the utility model;

[0015] Figure 2 This is a front view of a valve stem end face cladding device of the utility model;

[0016] Figure 3 It is a structural diagram of a limit device in a valve stem end face cladding device of the utility model;

[0017] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure cut along the AA direction;

[0018] Figure 5 for Figure 2 A schematic diagram of the cross-sectional structure of the welding table cut along the BB direction;

[0019] Among them, 1. Equipment body; 2. Welding device; 3. Support column; 4. Fixed frame; 41. Carrier plate; 42. Boss; 5. Mounting plate; 51. Mounting part; 52. Connecting part; 53. Load-bearing wheel; 54. Telescopic rod; 6. Limit screw 1; 7. Limit screw 2; 8. Welding table; 81. Movable center; 82. Inclined ring groove; 9. Valve. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] It should be noted that, in the description of the technical solution of the present invention, some directional words used to clearly describe the technical features of the present invention, such as "front", "back", "up", "down", "top", "bottom", "inside", "outside", etc., are all in accordance with the orientation of the drawings of the present invention.

[0022] Example

[0023] like Figure 1 and Figure 2 As shown, a valve stem end face surfacing device of this embodiment includes a device body 1, a welding device 2 and a valve bearing device. The device body 1 is provided with a welding table 8 for placing a valve 9. The welding table 8 can be rotatably mounted on the device body 1. The angle between the central axis of the welding table 8 and the vertical direction is more than 15°. The welding table 8 is provided with a movable top 81 for positioning the valve 9. The axis of the movable top 81 is perpendicular to the central axis of the welding table 8. Therefore, when the valve 9 is placed on the welding table 8, the axis of the valve 9 stem is perpendicular to the central axis of the welding table 8. The welding device 2 is located above the welding table 8 and is used for surfacing the valve 9. The valve bearing device includes a fixed frame 4, two symmetrically arranged mounting plates 5 and a bearing wheel 53 rotatably mounted on the mounting plate 5, the fixed frame 4 is fixedly mounted on the support column 3, the support column 3 is fixedly connected to the equipment body 1, the mounting plate 5 is adjustably mounted on the fixed frame 4, the axis of the bearing wheel 53 is parallel to the central axis of the welding table 8, and the distance between the bearing wheels 53 on the two mounting plates 5 can be adjusted in the direction of approaching or moving away from each other.

[0024] The two ends of the bearing wheel 53 are rotatably connected to the telescopic rod 54. The telescopic rod 54 includes an inner sleeve rod and an outer sleeve. One end of the inner sleeve rod is fixedly connected to the mounting plate 5, and the other end is slidably sleeved in the outer sleeve. An elastic member is connected between the inner sleeve rod and the outer sleeve. When the stem of the valve 9 is pressed against the bearing wheel 53, the outer sleeve overcomes the elastic force of the elastic member and abuts against the mounting plate 5. The elastic member adopts the structure in the prior art, such as a U-shaped spring or a spring. With this design, when the stem of the valve 9 is pressed against the bearing wheel 53, the elastic member can buffer the mechanical impact force between the stem of the valve 9 and the bearing wheel 53. At the same time, because the elastic force of the elastic member is smaller than the force applied by the stem of the valve 9 on the bearing wheel 53, the outer sleeve can abut against the mounting plate 5, and will not affect the position accuracy of the stem of the valve 9.

[0025] like Figure 3 Figure 4 As shown, the mounting plate 5 includes a mounting portion 51 and a connecting portion 52, the load-bearing wheel 53 is mounted on the mounting portion 51, and the connecting portion 52 is mounted on the fixing frame 4 through an adjustable limiting assembly. The adjustable limiting assembly includes a limiting screw rod 1 6, and the fixing frame 4 is symmetrically connected with a carrier plate 41 on both sides, and the carrier plate 41 is parallel and spaced apart from the fixing frame 4, and the mounting portion 51 is located between the carrier plate 41 and the fixing frame 4, and the limiting screw rod 1 6 is rotatably mounted on the carrier plate 41, and one end of the limiting screw rod 1 6 is threaded through the mounting portion 51 and then abuts against the fixing frame 4. Specifically in this embodiment, the adjustable limiting assembly also includes a limiting screw rod 2 7, and the limiting screw rod 2 7 is threaded through the carrier plate 41 and then abuts against the mounting portion 51, so as to prevent the mounting portion 51 from shifting outward. The fixing frame 4 is symmetrically provided with protruding columns 42 on both sides, and the axis of the protruding columns 42 is parallel to the axis of the limiting screw 6. The mounting portion 51 is correspondingly provided with a clamping hole, and the mounting portion 51 can be freely slidably sleeved on the outer side of the protruding column 42 through the clamping hole.

[0026] The angle between the central axis of the welding table 8 and the vertical direction is 15°-60°. Specifically in this embodiment, the angle between the central axis of the welding table 8 and the vertical direction is preferably 35° or 45°. With this design, when the valve 9 is placed on the welding table 8, the stem of the valve 9 is placed obliquely relative to the vertical direction, and one side of the stem of the valve 9 is pressed against the load-bearing wheel 53, and the outer sleeve is pressed against the mounting plate 5 by its own weight. Under the action of the gravity of the stem of the valve 9, it can be ensured that the stem of the valve 9 is always pressed against the load-bearing wheel 53. And when the welding table 8 rotates, the stem of the valve 9 is driven to rotate synchronously.

[0027] In order to prevent the dust generated during welding from accumulating around the valve 9 on the welding table 8, in this embodiment, a plurality of inclined annular grooves 82 are provided on the upper surface of the welding table 8 from the inside to the outside, and the bottom surface of the inclined annular groove 82 is an inclined surface that gradually inclines downward from the inside to the outside. Taking the plane where the welding table 8 is located as a reference, the highest point of the inclined annular groove 82 located on the outside is lower than the highest point of the inclined annular groove 82 located on the inside, and the inclination angle of the bottom surface of each inclined annular groove 82 is the same. With this structural design, excess dust will gradually move to the edge of the welding table 8 through the inclined annular groove 82. Avoid accumulation around the valve 9. Furthermore, a plurality of through grooves can be provided on the welding table 8 at intervals in the annular direction, and a dust collecting box (not shown in the figure) can be placed below the through grooves, so that excess dust will fall into the dust collecting box through the through grooves for collection.

[0028] The utility model provides a valve stem end face surfacing device, in which the welding table 8 and the load-bearing wheel 53 are arranged at an angle, and can rely on the valve 9 stem's own gravity to achieve stable contact with the load-bearing wheel 53, thereby simplifying the support structure of the valve 9 stem; at the same time, the load-bearing wheel 53 is installed on the adjustable mounting plate 5, which can adapt to valve 9 stems of different sizes, expand the scope of application, and improve practicality; a plurality of inclined annular grooves 82 are provided on the welding table 8 for guiding excess dust away from the valve 9 to avoid dust accumulation.

[0029] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. A valve stem end face surfacing device, characterized in that: The invention comprises an equipment body (1), a welding device (2) and a valve bearing device, wherein a welding table (8) for placing a valve (9) is provided on the equipment body (1), the angle between the central axis of the welding table (8) and the vertical direction is greater than 15°, and a movable top (81) is provided on the welding table (8) for positioning the valve (9). The valve bearing device comprises a fixing frame (4), two symmetrically arranged mounting plates (5) and a bearing wheel (53) rotatably mounted on the mounting plates (5), wherein the fixing frame (4) is fixedly mounted on the equipment body (1), and the mounting plates (5) are adjustably mounted on the fixing frame (4), the axis of the bearing wheel (53) is parallel to the central axis of the welding table (8), and the distance between the bearing wheels (53) on the two mounting plates (5) can be adjusted in a direction of approaching or moving away from each other.

2. The valve stem end face surfacing equipment according to claim 1, characterized in that: The two ends of the load-bearing wheel (53) are rotatably connected to the telescopic rod (54), and the telescopic rod (54) comprises an inner sleeve rod and an outer sleeve. One end of the inner sleeve rod is fixedly connected to the mounting plate (5), and the other end is slidably sleeved in the outer sleeve. An elastic member is connected between the inner sleeve rod and the outer sleeve. When the valve (9) rod is pressed against the load-bearing wheel (53), the outer sleeve overcomes the elastic force of the elastic member and abuts against the mounting plate (5).

3. A valve stem end face surfacing equipment according to claim 1 or 2, characterized in that: The mounting plate (5) comprises a mounting portion (51) and a connecting portion (52), the load-bearing wheel (53) is mounted on the mounting portion (51), and the connecting portion (52) is mounted on the fixing frame (4) by adjusting a limit stop assembly.

4. The valve stem end face cladding equipment according to claim 3, characterized in that: The adjustable limit assembly comprises a limit screw rod (6), a carrier plate (41) symmetrically connected to both sides of the fixing frame (4), the carrier plate (41) and the fixing frame (4) are arranged in parallel and spaced apart, the mounting portion (51) is located between the carrier plate (41) and the fixing frame (4), the limit screw rod (6) is rotatably mounted on the carrier plate (41), and one end of the limit screw rod (6) is threadedly passed through the mounting portion (51) and then abuts against the fixing frame (4).

5. The valve stem end face surfacing equipment according to claim 4, characterized in that: The fixing frame (4) is symmetrically provided with protruding columns (42) on both sides, the axis of the protruding columns (42) is parallel to the axis of the limiting screw rod (6), and the mounting portion (51) is correspondingly provided with a clamping hole, and the mounting portion (51) can be freely slidably sleeved on the outside of the protruding columns (42) through the clamping hole.

6. The valve stem end face cladding equipment according to claim 1, characterized in that: The angle between the central axis of the welding table (8) and the vertical direction is 15°-60°.

7. The valve stem end face cladding equipment according to claim 1, characterized in that: The upper surface of the welding platform (8) is provided with a plurality of inclined annular grooves (82) from the inside to the outside, and the bottom surface of the inclined annular groove (82) is an inclined surface that gradually inclines downward from the inside to the outside.

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