Automatic tapping machine for valve seat inner thread

Abstract

The utility model discloses a valve seat internal thread automatic tapping machine, it includes frame table, set up the column board on frame table, workpiece positioning device, clamping mechanism and pressure mechanism, the tapping power head is installed through feeding mechanism on the column board, feeding mechanism can control tapping power head up and down lift movement, workpiece positioning device is used for positioning the placement to valve seat workpiece, clamping mechanism includes two electric push rods of symmetrical setting in workpiece positioning device both sides and the V type positioning block of setting on every electric push rod output, electric push rod can drive V type positioning block and carry out clamping to the lateral wall of valve seat workpiece, pressure mechanism is used for the pressure to valve seat workpiece. The utility model discloses simple structure, and clamping is stable convenient, and the higher machining precision can be applicable to disc -shaped valve seat and so on workpiece processing.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing equipment technology, and in particular to an automatic tapping machine for valve seat internal threads. Background Technology

[0002] Currently, in the valve manufacturing industry, the machining of internal threads on valve seats is a critical process. Traditional internal thread machining often employs manual or semi-automatic tapping equipment, which suffers from low efficiency, high labor intensity, and poor accuracy consistency. Especially for mass production, traditional methods struggle to guarantee both machining quality and production efficiency. While some automatic tapping equipment exists, most are complex in structure, lack adaptability, and are not specifically designed for valve seat workpieces. Their clamping and positioning are inconvenient, easily leading to deviations in the accuracy of the threaded hole position. Furthermore, due to the diverse styles of valve seats, positioning and clamping disc-shaped valve seat workpieces is not convenient, resulting in instability during thread machining, larger errors, and low yield. Therefore, there is an urgent need for a highly efficient, precise, and stable tapping device specifically designed for machining internal threads on valve seats. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an automatic tapping machine for valve seat internal threads. It has a simple structure, stable and convenient clamping, higher processing accuracy, and can be applied to the processing of workpieces such as disc-shaped valve seats.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] An automatic tapping machine for valve seat internal threads includes a frame, a column plate mounted on the frame, a workpiece positioning device, a clamping mechanism, and a pressing mechanism.

[0006] A tapping head is mounted on the column plate via a feeding mechanism, which can control the tapping head to move up and down.

[0007] The workpiece positioning device is used to position and place the valve seat workpiece.

[0008] The clamping mechanism includes two electric push rods symmetrically arranged on both sides of the workpiece positioning device, and a V-shaped positioning block arranged on the output end of each electric push rod;

[0009] The electric push rod can drive the V-shaped positioning block to clamp the side wall of the valve seat workpiece, and the clamping mechanism is used to clamp the valve seat workpiece.

[0010] Furthermore, the workpiece positioning device includes a slide table mounted on the machine frame and a positioning base that is detachably and slidably mounted in the middle of the slide table.

[0011] Furthermore, the clamping mechanism includes two rotary cylinders symmetrically arranged on both sides of the workpiece positioning device, an extension rod disposed on the output end of each rotary cylinder, and a pressure block rotatably disposed at the end of the extension rod.

[0012] Furthermore, an extension frame is also provided on the machine frame, and the rotary cylinder and electric push rod are both mounted on the extension frame.

[0013] Furthermore, the feeding mechanism includes a linear guide rail mounted on the column plate, a servo electric cylinder for driving the linear guide rail slider to move up and down, and an adapter plate connected to the linear guide rail slider.

[0014] Furthermore, the tapping power head includes a servo motor mounted on the adapter plate, a reducer connected to the output end of the servo motor, and a tap chuck mounted on the lower end of the reducer.

[0015] Furthermore, the machine stand is also equipped with a cooling and lubrication system suitable for cooling and lubricating the valve seat workpiece during processing.

[0016] Furthermore, the cooling and lubrication system includes a coolant tank mounted on the machine frame, a water pump mounted inside the coolant tank, and a nozzle connected to the output end of the water pump.

[0017] Furthermore, a safety light curtain is also installed on the outside of the frame platform.

[0018] By adopting the above technical solution, this utility model has the following beneficial effects:

[0019] 1. This utility model, through the design of electric push rods and V-shaped positioning blocks for clamping mechanisms on both sides, can clamp valve seat workpieces, especially disc-shaped valve seats. It has a wide range of applications and can handle the processing of valve seats of various shapes.

[0020] 2. This utility model uses a workpiece positioning device to position and place the valve seat workpiece, and uses clamping and pressing mechanisms on both sides to clamp and fix the workpiece, which makes the positioning stability of the workpiece during processing higher, the accuracy of internal thread processing higher, and the error smaller, thereby improving the production yield.

[0021] 3. This utility model uses a servo motor and an electric cylinder to precisely control the speed and feed, ensuring the consistency of thread machining accuracy.

[0022] 4. The workpiece positioning device of this utility model, through the design of a sliding table and a detachable sliding assembly positioning base, allows for adjustment and replacement of the positioning base according to different models of valve seat workpieces, thereby adapting to the processing requirements of valve seat workpieces of different sizes.

[0023] 5. This utility model has a high degree of automation. It can automatically clamp, tap, retract the tool, and cool and lubricate through PLC control, which greatly reduces the intensity of manual operation and improves production efficiency.

[0024] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the front structure of an embodiment of the present utility model;

[0027] Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0028] The components include: 1. Frame; 10. Column plate; 2. Workpiece positioning device; 20. Slide table; 21. Positioning base; 3. Clamping mechanism; 30. Electric push rod; 31. V-shaped positioning block; 4. Pressing mechanism; 40. Rotary cylinder; 41. Extension rod; 42. Pressure block; 5. Tapping power head; 50. Servo motor; 51. Reducer; 52. Tap chuck; 6. Feeding mechanism; 60. Servo electric cylinder; 61. Linear guide rail; 62. Adapter plate; 7. Cooling and lubrication system; 71. Coolant tank; 72. Nozzle; 8. Elevator. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0031] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0035] like Figure 1-3 As shown in this embodiment, an automatic tapping machine for valve seat internal threads is provided. It mainly consists of a frame 1, a column plate 10, a workpiece positioning device 2, a clamping mechanism 3, a pressing mechanism 4, a tapping power head 5, a feeding mechanism 6, and a cooling and lubrication system 7. The column plate 10 is fixed to the rear top of the frame 1. The workpiece positioning device 2 is located at the center of the top of the frame 1, and the clamping mechanism 3 and pressing mechanism 4 are located on either side of the workpiece positioning device 2. The tapping power head 5 is mounted on the column plate 10 via the feeding mechanism 6, which controls the up-and-down movement of the tapping power head 5. The workpiece positioning device 2 is used to position and place the valve seat workpiece, the clamping mechanism 3 is used to clamp the valve seat workpiece, and the pressing mechanism 4 is used to press the valve seat workpiece.

[0036] Specifically, the clamping mechanism 3 in this embodiment includes two electric push rods 30 and V-shaped positioning blocks 31. To accommodate the workpiece height, two extension frames 8 are also provided on the machine frame 1. The two extension frames 8 are symmetrically arranged on both sides of the workpiece positioning device 2. The two electric push rods 30 are respectively mounted on the two extension frames 8, and the two V-shaped positioning blocks 31 are respectively set on the output ends of the two electric push rods 30. During clamping, the electric push rods 30 can drive the V-shaped positioning blocks 31 to clamp the side wall of the valve seat workpiece. At the same time, the pressing mechanism 4 includes two rotary cylinders 40 symmetrically arranged on both sides of the workpiece positioning device 2. The two rotary cylinders 40 are also respectively mounted on the two extension frames 8. Each rotary cylinder 40 has an extension rod 41 at its output end, and a pressure block 42 is rotatably mounted at the end of each extension rod 41. That is, the two pressure blocks 42 are close to the middle workpiece positioning device 2. During pressing, the two rotary cylinders 40 can drive the extension rods 41 to swing and then drive the end pressure blocks 42 to press the top of the valve seat workpiece. The valve seat workpiece is positioned using the workpiece positioning device 2, and then clamped and fixed by the clamping mechanisms 3 and pressing mechanism 4 on both sides. This results in higher positioning stability during workpiece processing, higher precision in machining internal threads, and smaller errors, thereby improving production yield. Furthermore, the clamping mechanism 3, with its electric push rod 30 and V-shaped positioning block 31, can clamp the valve seat workpiece, especially disc-shaped valve seats, making it widely applicable and capable of processing valve seats of various shapes.

[0037] To accommodate valve seat workpieces of various sizes, the workpiece positioning device 2 in this embodiment includes a slide table 20 mounted on the machine frame 1 and a positioning base 21 detachably and slidably mounted in the middle of the slide table 20. When different sizes of workpieces need to be processed, the positioning base 21 can be slid out and in for model replacement, and the workpieces can be locked in place by bolts and the two sides of the slide table 20. In this way, the positioning base 21 can be adjusted and replaced according to different models of valve seat workpieces, thereby adapting to the processing requirements of valve seat workpieces of different sizes.

[0038] Specifically, the feeding mechanism 6 in this embodiment includes a linear guide rail 61 mounted on the column plate 10, a servo electric cylinder 60 for driving the slider of the linear guide rail 61 to move up and down, and an adapter plate 62 connected to the slider of the linear guide rail 61. The tapping power head 5 specifically includes a servo motor 50 mounted on the adapter plate 62, a reducer 51 connected to the output end of the servo motor 50, and a tap chuck 52 mounted at the lower end of the reducer 51. After the valve seat workpiece is clamped, positioned, and fixed, the slider on the linear guide rail 61 can be slowly moved down by the servo electric cylinder 60, which then drives the tap chuck 52 to move down. At the same time, the servo motor 50 drives the tap chuck 52 to rotate through the reducer 51. The slow downward movement can perform internal thread machining on the valve seat workpiece.

[0039] In the specific operation, the operator places the valve seat workpiece on the positioning base 21, presses the start button, and the fixture automatically clamps and presses the workpiece. The PLC controller, according to a preset program, controls the servo electric cylinder 60 to move the tapping power head 3 downwards, while the servo motor 31 starts tapping. After reaching the set depth, the power head automatically reverses and retracts the tool, while coolant is continuously sprayed. After retraction, the fixture releases, the workpiece is removed, and one machining cycle is completed. The use of servo motors and electric cylinders allows for precise control of speed and feed, ensuring consistent thread machining accuracy. PLC control enables automatic clamping, tapping, tool retraction, and cooling / lubrication, resulting in a high degree of automation, significantly reducing manual labor intensity and improving production efficiency.

[0040] To facilitate cooling and lubrication during thread machining, a cooling and lubrication system 7 is also provided on the machine frame 1 in this embodiment. The cooling and lubrication system 7 specifically includes a coolant tank 71 mounted on the machine frame 1, a water pump housed within the coolant tank 71, and a nozzle 72 connected to the output end of the water pump. The nozzle 72 is aimed at the machining area of ​​the valve seat workpiece, and the water pump is activated to spray the fluid during machining.

[0041] To ensure safety during processing, a safety light curtain or protective cover is also provided on the outside of the machine frame 1 in this embodiment.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic tapping machine for valve seat internal threads, characterized in that: It includes a machine frame (1), a column plate (10) set on the machine frame (1), a workpiece positioning device (2), a clamping mechanism (3) and a pressing mechanism (4); A tapping power head (5) is installed on the column plate (10) via a feeding mechanism (6), and the feeding mechanism (6) can control the tapping power head (5) to move up and down. The workpiece positioning device (2) is used to position and place the valve seat workpiece; The clamping mechanism (3) includes two electric push rods (30) symmetrically arranged on both sides of the workpiece positioning device (2), and a V-shaped positioning block (31) arranged on the output end of each electric push rod (30); The electric push rod (30) can drive the V-shaped positioning block (31) to clamp the side wall of the valve seat workpiece, and the clamping mechanism (4) is used to clamp the valve seat workpiece.

2. The automatic tapping machine for valve seat internal threads according to claim 1, characterized in that: The workpiece positioning device (2) includes a slide (20) mounted on the machine frame (1) and a positioning base (21) detachably and slidably mounted in the middle of the slide (20).

3. The automatic tapping machine for valve seat internal threads according to claim 1, characterized in that: The clamping mechanism (4) includes two rotary cylinders (40) symmetrically arranged on both sides of the workpiece positioning device (2), an extension rod (41) arranged on the output end of each rotary cylinder (40), and a pressure block (42) rotatably arranged at the end of the extension rod (41).

4. The automatic tapping machine for valve seat internal threads according to claim 3, characterized in that: The machine frame (1) is also equipped with a height-increasing frame (8), and the rotary cylinder (40) and electric push rod (30) are both installed on the height-increasing frame (8).

5. The automatic tapping machine for valve seat internal threads according to claim 1, characterized in that: The feeding mechanism (6) includes a linear guide rail (61) mounted on the column plate (10), a servo electric cylinder (60) for driving the slider of the linear guide rail (61) to move up and down, and an adapter plate (62) connected to the slider of the linear guide rail (61).

6. The automatic tapping machine for valve seat internal threads according to claim 5, characterized in that: The tapping power head (5) includes a servo motor (50) mounted on the adapter plate (62), a reducer (51) connected to the output end of the servo motor (50), and a tap chuck (52) mounted on the lower end of the reducer (51).

7. The automatic tapping machine for valve seat internal threads according to claim 1, characterized in that: The machine frame (1) is also equipped with a cooling and lubrication system (7) suitable for cooling and lubricating the valve seat workpiece during processing.

8. The automatic tapping machine for valve seat internal threads according to claim 7, characterized in that: The cooling and lubrication system (7) includes a coolant tank (71) mounted on the frame (1), a water pump mounted in the coolant tank (71), and a nozzle (72) connected to the output end of the water pump.

9. The automatic tapping machine for valve seat internal threads according to claim 1, characterized in that: A safety light curtain is also installed on the outside of the machine frame (1).

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