CN116810288A - An automatically rotating round pipe welding fixture - Google Patents

Abstract

The application belongs to the technical field of welding equipment, and particularly relates to a circular tube welding fixture capable of automatically rotating; the movable table is provided with a sliding rail, a chuck capable of moving along the sliding rail and fixing weldments and a center frame are arranged on the sliding rail, the center frame comprises a base and a back plate, a U-shaped groove is formed in the back plate, a piston arm fixing plate is arranged on the base through a first fastening screw, a lower piston arm is arranged on the piston arm fixing plate, a lower piston is arranged in the lower piston arm, a supporting frame is arranged at the top of the lower piston, upper piston arms are transversely arranged on two side walls of the U-shaped groove, an upper piston is arranged in the upper piston arm, a clamp is connected to the tail end of the upper piston, a bearing is arranged on the clamp, and the lower piston arm and the upper piston arm are communicated with a gas circuit; not only can the functions of the traditional center rest in the processing process be realized, but also the defects caused by the traditional center rest in the processing process can be overcome.

Description

An automatically rotating round pipe welding fixture

Technical field

The invention belongs to the technical field of welding equipment, and specifically relates to an automatically rotating round pipe welding fixture.

Background technique

In the machining industry, especially in welding processing, center frames are often used. The center frame is an auxiliary device that radially supports rotating workpieces during processing. When welding slender parts, in order to prevent the workpiece from bending and deforming due to gravity, the center frame is one of the main accessories to ensure the processing accuracy of these workpieces. At present, as the welding requirements for heavy-duty, large-diameter, and slender round pipes increase, the existing casting center frame cannot meet the welding requirements for heavy-duty, large-diameter, and slender round pipes in terms of adjustable processing diameter, range, quality, etc. Yes, using the original center frame cannot guarantee the processing accuracy of the workpiece, so a new type of center frame is needed to better solve the problem of heavy-load, large-diameter, and slender round tube processing.

The center frame currently on the market is mainly used in lathes, grinders, CNC machine tools, etc. It consists of a pressure plate, a support seat, a clamping block and a center frame. The center frame is divided into two parts: the upper body of the center frame and the lower body of the center frame. The lower body is welded on On the support ribs on the support base, the upper and lower bodies are connected with pins through the pin holes on the ear plates, and with slip-knot bolts and pins through the pins on the seats of the upper body and the ear plates of the lower body, the support base It is fixed on the track of the lathe through T-bolts, nuts and pressure plates, and the clamping block is welded on the center frame; it is mainly used for processing slender shafts. It is installed at the place where the slender shaft has the largest deflection, and the auxiliary support is adjusted to process with it. The datum coincides; the transmission mode of the center frame is mainly hydraulic transmission and manual. The hydraulic transmission center frame is expensive and inconvenient to operate. The manual center frame cannot be quickly centered, installed and disassembled. It is too heavy and requires extremely high requirements on operators.

Therefore, this application proposes an automatically rotating round pipe welding fixture.

Contents of the invention

The purpose of the present invention is to propose an automatically rotating round tube welding tooling fixture that can not only realize the functions of the traditional center frame in the processing process, but also solve the disadvantages caused by the traditional center frame during processing.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

An automatically rotating round tube welding tooling fixture includes a movable table. The movable table is provided with a slide rail. The slide rail is provided with a chuck and a center frame that can move along the slide rail and fix welding parts.

The center frame includes a base and a back plate, with a U-shaped groove on the back plate.

And a piston arm fixed plate is provided on the base through a first fastening screw, a lower piston arm is provided on the piston arm fixed plate, a lower piston is provided in the lower piston arm, and a support frame is provided on the top of the lower piston.

Upper piston arms are disposed transversely on both sides of the U-shaped groove. An upper piston is disposed in the upper piston arm. A clamp is connected to the end of the upper piston, and a bearing is disposed on the clamp.

Both the lower piston arm and the upper piston arm are connected to the air path, and the air path is connected to the air pipe on the pneumatic transmission system. The pneumatic transmission system mainly includes energy device execution components, pneumatic control components, and auxiliary component working media. The pneumatic transmission system is the existing market Purchased above, its internal structure, working principle and connection relationship are all well known in the art.

The clamp and the support frame move separately, and the lower support frame is used for adjustment. When the processing dimensions are different and the geometric center is uncertain, the support frame is needed for adjustment.

When the gear is in contact with the workpiece, the air pressure is designed according to the size of the workpiece to determine the clamping strength of the fixture. When welding the workpiece, the workpiece can rotate freely and will not be limited by the clamping force of the fixture. The use of bearings can also ensure that the surface quality of the workpiece will not be damaged, and can be used to process workpieces that do not require high surface accuracy.

The clamp and the upper piston are used to fix the bearing and transmission. The upper piston arm and the clamp are connected through slide grooves and slide rails to achieve positioning.

Further, the upper piston and the clamp are connected through a piston clamp connecting plate, and a second fastening screw is provided on the piston clamp connecting plate, and the two move together.

Further, the bearings are arranged along the radially outward extending direction of the clamp, and two bearings are symmetrically arranged at the end of each clamp.

Furthermore, the air passages of the upper piston arm are distributed horizontally and vertically on both sides of the piston arm fixed plate.

Further, a plurality of first fastening screws are provided.

Further, the lower piston arm and the support frame are connected through slide grooves and slide rails.

Further, the upper piston arm and the clamp are connected through slide grooves and slide rails.

Compared with the prior art, the present invention has at least one of the following beneficial effects:

In the present invention, the main body of the clamp is driven by air pressure to drive the movement of the clamp, thereby achieving the clamping effect; among them, the lower support frame and the left and right clamps move separately, and the lower support frame is used to adjust when the processing dimensions are different. When the geometric center is uncertain, a support frame is needed for adjustment.

When the gear is in contact with the workpiece, the air pressure will be designed according to the size of the workpiece to determine the clamping strength of the clamp; when the workpiece is welded, the workpiece can rotate freely and will not be restricted by the clamping force of the clamp. The use of bearings can also ensure that the surface quality of the workpiece will not be damaged, and can be used to process workpieces that do not require high surface accuracy.

In addition, the present invention uses pneumatic transmission, which has the following advantages: the working medium is air, which is convenient in source, inexhaustible and inexhaustible. After use, it is directly discharged into the atmosphere without pollution, and there is no need to set up a special recovery device; The viscosity of air is very small, so the pressure loss during flow is small. It is energy-saving and efficient. It is suitable for centralized air supply and long-distance transportation. It acts quickly, responds quickly, is easy to adjust, and is simple to maintain. When there is a system failure, it is easy to eliminate it by using air pressure. The signal realizes automatic control, without any sense of mystery; it has good adaptability to the working environment. It is especially suitable for working under harsh conditions such as flammable, explosive, moist, dusty, strong magnetism, vibration, radiation, etc. The exhaust does not pollute the environment. It is more suitable for applications in food, light industry, textile, printing, precision testing and other occasions. Advantages: low cost, with overload protection function.

Working principle of the invention:

The pneumatic transmission system of the lower support frame is driven independently. The pneumatic transmission system is connected to the lower piston arm through the air pipe, which is equivalent to a cylinder and moves independently;

The lower support frame rises: When the lower piston starts to move from the lower piston arm cover, the working volume in the lower piston arm gradually increases. At this time, the gas flows along the intake pipe until the working volume reaches the maximum, and the intake valve When the lower air path is closed, the pneumatic transmission presses the piston upward, and then the air pressure flows out from the upper pipe mouth, increasing the air pressure in the cylinder, thereby achieving the function of raising the support frame.

The lower support frame descends: When the piston moves in reverse, the working volume in the lower piston arm decreases, the exhaust valve opens, and the gas is discharged from the lower piston arm until the piston moves to the extreme position, and the exhaust valve closes, thus achieving the function of lowering the support frame. .

The left and right upper piston air pressure transmission systems are driven together. When the piston of the piston compressor starts to move from the upper piston arm cover, the working volume in the upper piston arm gradually increases. At this time, the gas is pushed along the intake pipe. The intake valve enters the upper piston arm until the working volume reaches the maximum, and the intake valve closes; when the piston of the piston compressor moves reversely, the working volume in the upper piston arm decreases and the gas pressure increases. When the upper piston When the pressure in the arm reaches and is slightly higher than the exhaust pressure, the exhaust valve opens and the gas is discharged from the upper piston arm until the piston moves to the extreme position and the exhaust valve closes. This process repeats itself when the piston of the piston compressor moves in the opposite direction again. In short, the crankshaft of the piston compressor rotates once, the piston reciprocates once, and the processes of air intake, compression, and exhaust are successively realized in the upper piston arm, that is, a working cycle is completed. To put it simply, the stepper motor rotates to drive the amplifier to work, and the air pressure servo valve starts to work, transmitting the air pressure to the cylinder, and then the cylinder drives the piston to move. This enables the movement of the fixture.

Description of the drawings

Figure 1 is a general perspective view of the round pipe welding clamping device.

Figure 2 is a perspective view of the round pipe welding tool clamp.

Figure 3 is a perspective view of the fixture.

Figure 4 is an assembly perspective view of the piston and clamp.

In the picture, 1-base; 2-first fastening screw; 3-piston arm fixed plate; 4-lower piston arm; 5-support bracket; 6-air path; 7-bearing; 8-clamp; 9-upper piston Arm; 10-upper piston; 11-second fastening screw; 12-piston clamp connecting plate; 13-lower piston.

Detailed ways

As shown in Figures 1-4, in order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

Example 1

An automatically rotating round tube welding tooling fixture includes a movable table. The movable table is provided with a slide rail. The slide rail is provided with a chuck and a center frame that can move along the slide rail and fix the weldment. It is characterized by: The center frame includes a base 1 and a back plate, and a U-shaped groove is provided on the back plate.

And a piston arm fixed plate 3 is provided on the base 1 through a first fastening screw 2. A lower piston arm 4 is provided on the piston arm fixed plate 3. A lower piston 13 is provided in the lower piston arm 4. The top of the lower piston 13 is provided with a Support frame 5,

An upper piston arm 9 is disposed transversely on both sides of the U-shaped groove. An upper piston 10 is disposed in the upper piston arm 9. A clamp 8 is connected to the end of the upper piston 10. A bearing 7 is disposed on the clamp 8.

Both the lower piston arm 4 and the upper piston arm 9 are connected to the air path.

The purpose of this design is that in the present invention, the main body of the clamp is driven by air pressure to drive the movement of the clamp, thereby achieving the clamping effect; among them, the lower support frame and the left and right clamps move separately, and the lower support frame is used to adjust the processing time. When the sizes are different and the geometric center is uncertain, a support frame is needed to adjust. When the gear is in contact with the workpiece, the air pressure will be designed according to the size of the workpiece to determine the clamping strength of the clamp; when the workpiece is welded, the workpiece can rotate freely and will not be restricted by the clamping force of the clamp. The use of bearings can also ensure that the surface quality of the workpiece will not be damaged, and can be used to process workpieces that do not require high surface accuracy.

Example 2

On the basis of Embodiment 1, the upper piston 10 and the clamp 8 are connected through the piston clamp connecting plate 12, and the piston clamp connecting plate 12 is provided with a second fastening screw 11; the purpose of this design is to facilitate disassembly and installation.

Example 3

On the basis of Embodiment 1, the bearings 7 are arranged along the radially outward extending direction of the clamp 8, and two bearings 7 are symmetrically arranged at the end of each clamp 8. The purpose of this design is to be able to clamp the workpiece while also It ensures that the surface quality of the workpiece will not be damaged and can be used to process workpieces that do not require high surface accuracy.

Example 4

On the basis of Embodiment 1, the air passages of the upper piston arm 9 are distributed horizontally and vertically on both sides of the piston arm fixing plate 3. The purpose of this design is to reduce the entanglement of the lines.

Example 5

On the basis of Embodiment 1, multiple first fastening screws 2 are provided, and the purpose of this design is to increase connection stability.

Example 6

On the basis of Embodiment 1, the lower piston arm 4 and the support frame 5 are connected through the slide groove and the slide rail, and the upper piston arm 9 and the clamp 8 are connected through the slide groove and the slide rail to facilitate the support frame 5 and the clamp 8 Slide in it.

Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that those skilled in the art can devise numerous other modifications and embodiments which will fall within the scope of this disclosure. within the scope and spirit of the principles. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, drawings and claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (7)

1. But autogiration's pipe welding frock clamp, including the movable table, be provided with the slide rail on the movable table, be provided with chuck and the center rest that can follow the slide rail and remove and can fixed weldment on the slide rail, its characterized in that: the center frame comprises a base (1) and a back plate, a U-shaped groove is arranged on the back plate,

and a piston arm fixing plate (3) is arranged on the base (1) through a first fastening screw (2), a lower piston arm (4) is arranged on the piston arm fixing plate (3), a lower piston (13) is arranged in the lower piston arm (4), a supporting frame (5) is arranged at the top of the lower piston (13),

upper piston arms (9) are transversely arranged on two side walls of the U-shaped groove, an upper piston (10) is arranged in the upper piston arms (9), the tail end of the upper piston (10) is connected with a clamp (8), a bearing (7) is arranged on the clamp (8),

the lower piston arm (4) and the upper piston arm (9) are both communicated with an air passage, the air passage is connected with an air pipe on the air pressure transmission system, the bearings (7) are arranged along the radial outward extending direction of the clamps (8), and the tail end of each clamp (8) is symmetrically provided with two bearings (7).

2. The automatically rotatable tubular welding fixture of claim 1, wherein: the upper piston (10) and the clamp (8) are connected through a piston clamp connecting plate (12), and a second fastening screw (11) is arranged on the piston clamp connecting plate (12).

3. The automatically rotatable tubular welding fixture of claim 1 or 2, wherein: the air channels of the upper piston arm (9) are transversely and vertically staggered on two sides of the piston arm fixing plate (3).

4. The automatically rotatable tubular welding fixture of claim 1, wherein: the first fastening screw (2) is provided with a plurality of.

5. The automatically rotatable tubular welding fixture of claim 1, wherein: the lower piston arm (4) is connected with the supporting frame (5) through a sliding groove and a sliding rail.

6. The automatically rotatable tubular welding fixture of claim 1, wherein: the upper piston arm (9) is connected with the clamp (8) through a sliding groove and a sliding rail.

7. The automatically rotatable tubular welding fixture of claim 1, wherein:

the lower piston arm (4) and the upper piston arm (9) are both communicated with an air passage, the air passage is connected with an air pipe on an air pressure transmission system, the air pressure transmission system of the lower support frame is independently transmitted, and the air pressure transmission system is independently connected with the lower piston arm through the air pipe and corresponds to an air cylinder to independently move; the left and right upper piston pneumatic transmission systems are driven together.