Laser cladding tool for automatically correcting ball body of ball valve

Abstract

The utility model relates to the field of ball valve laser cladding, in particular to a laser cladding tool for automatically correcting a ball body of a ball valve. Comprising a lengthened shaft, a base, a middle transition shaft, a three-jaw chuck, a top disc, a pressing plate, a thrust washer, a pressing screw rod, an elastic piece and a ball valve workpiece, the three-jaw chuck is arranged on the base, the lengthened shaft is clamped on the three-jaw chuck, the right side of the lengthened shaft is in threaded connection with the middle transition shaft, the ball valve workpiece is sleeved on the middle transition shaft, a shaft hole is formed in the ball valve workpiece, and the middle transition shaft is in threaded connection with the top disc. The right side of the middle transition shaft is in threaded connection with a pressing screw, the pressing screw is connected with a top disc in a sliding mode, the right end of the top disc and the left end of a nut of the pressing screw are each provided with a pressing plate, the ends, close to each other, of the two pressing plates are each provided with a thrust washer, and an elastic piece is connected between the two pressing plates. According to the utility model, the pressing screw rod is connected with the top tray in a sliding manner, and in the cladding process, when the ball valve workpiece absorbs a large amount of heat and the aperture of the shaft hole is enlarged, the elastic piece pushes the top tray to automatically clamp the ball valve workpiece.

Description

Technical Field

[0001] The utility model relates to the field of laser cladding of ball valves, in particular to a laser cladding tool for automatically correcting the ball body of a ball valve. Background Art

[0002] With the continuous advancement of industry and the expansion of pump and valve applications, the demand for pump and valve materials and their performance standards are increasing. Ball valves, operating in harsh environments, in particular, require high wear and corrosion resistance on their surfaces and both sides of the shaft opening. To meet these stringent requirements, laser cladding is required on the surface and both sides of the shaft opening. Given the complex curves of the ball valve surface, a multi-axis robot is required for the cladding process.

[0003] The most common method for securing ball valves in existing technology is to use a three-jaw chuck to internally support the ball valve's shaft bore. However, during the laser cladding process, heat input causes the ball valve material to expand, increasing the size of the shaft bore and weakening the clamping force between the ball valve and the chuck. This creates a risk of the ball valve falling off during the cladding process, compromising process quality and posing a serious safety hazard to operators and equipment. Utility Model Content

[0004] In order to overcome the disadvantage of the prior art fixed ball valve that the ball valve has the risk of falling off during the cladding process, the purpose of the utility model is to provide a laser cladding tool for automatically correcting the ball of the ball valve.

[0005] The technical implementation scheme of the utility model is: a laser cladding tool for automatic correction of the ball of a ball valve, including an extended shaft, a base, a middle transition shaft, a three-jaw chuck, a top plate, a pressure plate, a thrust washer, a clamping screw, an elastic member and a ball valve workpiece. The base is provided with a three-jaw chuck, and the three-jaw chuck is clamped with an extended shaft. The right side of the extended shaft is threadedly connected to the middle transition shaft, and the ball valve workpiece is sleeved on the middle transition shaft. The ball valve workpiece is provided with an axial hole. The right side of the middle transition shaft is threadedly connected to the clamping screw, and the top plate is slidably connected to the clamping screw. The right end of the top plate and the left end of the clamping screw nut are both provided with pressure plates, and the ends of the two pressure plates close to each other are each provided with a thrust washer, and an elastic member is connected between the two pressure plates.

[0006] As a further preferred solution, a screw hole is provided between the right ends of the extension shaft, and a thread is provided on the left portion of the middle transition shaft, and the thread on the middle transition shaft is adapted to the screw hole on the extension shaft.

[0007] As a further preferred solution, circular protrusions are provided on the middle transition shaft and the top plate, and the circular protrusions are provided with inclined surfaces. The inclined surface on the left side gradually decreases from the right end to the left end of the circular protrusion, and the inclined surface on the right side gradually decreases from the left end to the right end of the circular protrusion. The diameter of the end where the two circular protrusions are close to each other is slightly larger than the diameter of the shaft hole of the ball valve workpiece.

[0008] As a further preferred solution, both left and right ends of the shaft hole of the ball valve workpiece are provided with chamfers.

[0009] As a further preferred solution, the left part of the tightening screw is provided with a thread, the right part of the tightening screw is a smooth curved surface, and the right end of the middle transition shaft is provided with a screw hole, and the thread is adapted to the screw hole at the right end of the middle transition shaft.

[0010] As a further preferred solution, it also includes a laser probe and a robotic arm. The robotic arm is provided on the rear side of the top end of the base, and the end of the robotic arm is connected to the laser probe.

[0011] The beneficial effects are: 1. A top plate is slidably connected to the tightening screw. During the cladding process, when the ball valve workpiece absorbs a large amount of heat and causes the aperture of the shaft hole to become larger, the elastic part pushes the top plate to automatically clamp the ball valve workpiece, preventing the ball valve workpiece from detaching and improving the qualified rate of the ball valve workpiece.

[0012] 2. There are many types of ball valve workpieces, and the inner diameters of the shaft holes vary. Different middle transition shafts can be selected according to the different specifications of the ball valve workpieces and installed on the extension shaft (the middle transition shaft is threadedly connected to the extension shaft and can be disassembled). Therefore, this tooling can be applied to ball valve workpieces with various diameter shaft holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 It is a three-dimensional structural diagram of the components such as the extended shaft and the laser probe of the utility model.

[0015] Figure 3 It is a three-dimensional structural diagram of the components such as the compression screw and the thrust washer of the utility model.

[0016] Figure 4 It is a schematic diagram of the local structure of the utility model.

[0017] Marked in the figure: 1_Extension shaft, 101_Base, 103_Three-jaw chuck, 2_Middle transition shaft, 201_Circular bump, 3_Top plate, 4_Pressure plate, 5_Thrust washer, 6_Compression screw, 7_Elastic part, 8_Ball valve workpiece, 9_Laser probe, 901_Robot arm. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] A laser cladding tool for automatic correction of ball valve spheres, such as Figures 1-4 As shown, it includes an extended shaft 1, a base 101, a middle transition shaft 2, a three-jaw chuck 103, a top plate 3, a pressure plate 4, a thrust washer 5, a tightening screw 6, an elastic member 7 and a ball valve workpiece 8. A three-jaw chuck 103 is provided on the base 101, and the three-jaw chuck 103 is clamped with an extended shaft 1. The right side of the extended shaft 1 is threadedly connected to the middle transition shaft 2. A screw hole is provided between the right ends of the extended shaft 1, and a thread is provided on the left side of the middle transition shaft 2. The thread on the middle transition shaft 2 is adapted to the screw hole on the extended shaft 1. The middle transition shaft 2 is detachable, and different middle transition shafts 2 can be selected according to the different specifications of the ball valve workpiece 8. The middle transition shaft 2 is sleeved with the ball valve workpiece 8, and an axis hole is provided in the ball valve workpiece 8. The left and right ends of the axis hole of the ball valve workpiece 8 are chamfered. The right side of 2 is threadedly connected with a clamping screw 6, which is used in conjunction with the middle transition shaft 2 to fix the ball valve workpiece 8. The left part of the clamping screw 6 is provided with a thread, and the right part of the clamping screw 6 is a smooth curved surface. The right end of the middle transition shaft 2 is provided with a screw hole, which is adapted to the screw hole at the right end of the middle transition shaft 2. A top plate 3 is slidably connected to the clamping screw 6, and the top plate 3 can slide on the smooth curved surface on the right side of the clamping screw 6. A pressure plate 4 is provided at the right end of the top plate 3 and the left end of the nut of the clamping screw 6. A thrust washer 5 is provided at the end where the two clamping plates 4 are close to each other. The thrust washer 5 is to prevent the loosening of the clamping screw 6 caused by vibration of the equipment during operation. An elastic member 7 is connected between the two clamping plates 4. The pressure plate 4 mainly serves to fix the elastic member 7, and to concentrate and buffer the force of the elastic member 7.

[0020] like Figure 3 and Figure 4 As shown, circular protrusions 201 are provided on the middle transition shaft 2 and the top plate 3, and the circular protrusions 201 are provided with inclined surfaces. The inclined surface on the left side gradually decreases from the right end to the left end of the circular protrusion 201, and the inclined surface on the right side gradually decreases from the left end to the right end of the circular protrusion 201. The diameter of the end where the two circular protrusions 201 are close to each other is slightly larger than the diameter of the axial hole of the ball valve workpiece 8. When the inclined surfaces on the circular protrusions 201 on the middle transition shaft 2 and the top plate 3 are both located in contact with the tool holder on the axial hole of the ball valve workpiece 8, the ball valve workpiece 8 is fastened between the middle transition shaft 2 and the top plate 3.

[0021] like Figure 1 and Figure 2As shown, it also includes a laser probe 9 and a robotic arm 901. The robotic arm 901 is provided on the rear side of the top of the base 101. The end of the robotic arm 901 is connected to the laser probe 9. The robotic arm 901 can drive the laser probe 9 to perform laser cladding on the ball valve workpiece 8.

[0022] The shaft hole of the ball valve workpiece 8 is sleeved on the right side of the middle transition shaft 2, so that the inclined surface of the circular protrusion 201 on the right side of the middle transition shaft 2 contacts the chamfer on the shaft hole of the ball valve workpiece 8. The existence of the chamfer is more conducive to the circular protrusion 201 to fix the ball valve workpiece 8. The left threaded part of the clamping screw 6 is aligned with the screw hole at the right end of the middle transition shaft 2, and the clamping screw 6 is screwed into the middle transition shaft 2. During this process, the top plate 3 moves into the shaft hole, and the inclined surface of the circular protrusion 201 on the top plate 3 presses the chamfer on the right side of the shaft hole. The elastic member 7 changes from the initial state to the compressed state, and the robotic arm 901 is started. The robotic arm 901 brings The laser probe 9 is moved to the left side opening of the shaft hole, and the left side opening of the shaft hole is laser clad. During the cladding process, the ball valve workpiece 8 absorbs a large amount of heat and expands, and the shaft hole becomes larger accordingly. In the process of the shaft hole gradually becoming larger due to heat, the elastic member 7 releases the compression force, pushing the left pressure plate 4 to move to the left, and the pressure plate 4 drives the top plate 3 to move to the left. The inclined surface of the circular protrusion 201 on the top plate 3 automatically presses the inner wall of the shaft hole. The ball valve workpiece 8 will not be separated from the middle transition shaft 2 and the top plate 3 due to thermal expansion. The thrust washer 5 is used to prevent the loosening of the fastening bolts caused by the vibration of the running multi-axis robot.

[0023] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications may be made to the present invention without departing from the principles and spirit of the present invention as defined in the claims. Therefore, the detailed description of the disclosed embodiments is intended to illustrate rather than limit the present invention, which shall be defined by the claims.

Claims

1. A laser cladding tool for automatic correction of a ball valve ball, comprising a base (101), characterized in that: The invention also includes an extension shaft (1), a middle transition shaft (2), a three-jaw chuck (103), a top plate (3), a pressure plate (4), a thrust washer (5), a pressing screw (6), an elastic member (7) and a ball valve workpiece (8). The base (101) is provided with a three-jaw chuck (103), the extension shaft (1) is clamped on the three-jaw chuck (103), the right side of the extension shaft (1) is threadedly connected to the middle transition shaft (2), and the middle transition shaft ( 2) is sleeved with a ball valve workpiece (8), an axial hole is provided in the ball valve workpiece (8), the right side of the middle transition shaft (2) is threadedly connected to a clamping screw (6), a top plate (3) is slidably connected to the clamping screw (6), a pressure plate (4) is provided at the right end of the top plate (3) and the left end of the nut of the clamping screw (6), a thrust washer (5) is provided at the end close to the two pressure plates (4), and an elastic member (7) is connected between the two pressure plates (4).

2. A laser cladding tool for automatic correction of a ball valve ball according to claim 1, characterized in that: The right end of the extended shaft (1) is provided with a screw hole, the left part of the middle transition shaft (2) is provided with a thread, and the thread on the middle transition shaft (2) is matched with the screw hole on the extended shaft (1).

3. The laser cladding tool for automatic correction of ball valve body according to claim 2, characterized in that: Circular protrusions (201) are provided on the middle transition shaft (2) and the top plate (3). The circular protrusions (201) are both provided with inclined surfaces. The inclined surface on the left side gradually decreases from the right end to the left end of the circular protrusion (201), and the inclined surface on the right side gradually decreases from the left end to the right end of the circular protrusion (201). The diameter of the ends of the two circular protrusions (201) that are close to each other is slightly larger than the diameter of the shaft hole of the ball valve workpiece (8).

4. The laser cladding tool for automatic correction of ball valve balls according to claim 3, characterized in that: Both left and right ends of the shaft hole of the ball valve workpiece (8) are provided with chamfers.

5. The laser cladding tool for automatic correction of ball valve body according to claim 4, characterized in that: The left part of the pressing screw (6) is provided with a thread, the right part of the pressing screw (6) is a smooth curved surface, and the right end of the middle transition shaft (2) is provided with a screw hole, and the thread is adapted to the screw hole at the right end of the middle transition shaft (2).

6. The laser cladding tool for automatic correction of ball valve body according to claim 5, characterized in that: It also includes a laser probe (9) and a mechanical arm (901). The mechanical arm (901) is provided at the rear side of the top end of the base (101), and the end of the mechanical arm (901) is connected to the laser probe (9).

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