CN118321800A - Assembling tool for welding oil cylinder liquid inlet pipe joint and using method - Google Patents

Abstract

The invention relates to the technical field of welding assembly tools, in particular to an assembly tool for welding an oil cylinder liquid inlet pipe joint and a use method. The invention comprises a joint for welding with a liquid inlet pipe, a rotating device and a positioning and clamping device; the rotating device comprises a turntable and a driving piece for driving the turntable to rotate; the positioning clamping device comprises a first positioning clamping assembly, a second positioning clamping assembly and a supporting assembly, wherein the supporting assembly is fixedly arranged at the top of the turntable and is positioned at the outer edge of the turntable, the first positioning clamping assembly is fixedly arranged on the outer wall of the supporting assembly, and the second positioning clamping assembly is fixedly arranged at the top of the turntable. According to the invention, through the positioning and clamping device, the positioning and clamping of the liquid inlet pipe and the joint can be realized respectively; through rotary device, can drive feed liquor pipe and joint rotation to realize feed liquor pipe and joint not receive the restriction of welding position, improve welding efficiency and welding quality.

Description

An assembly tool for welding a fluid inlet pipe joint of an oil cylinder and a method of using the same

Technical Field

The invention relates to the technical field of welding assembly tooling, and in particular to an assembly tooling for welding a fluid inlet pipe joint of an oil cylinder and a use method thereof.

Background technique

The columns and jacks in the hydraulic support mainly play a bearing role. The overall movement of the support is controlled by the stroke. The reliability, safety and fatigue life of each component of the hydraulic support will directly affect the overall performance of the product. The welding of the oil cylinder in the column jack is particularly critical, especially the welding of the oil cylinder liquid inlet pipe joint assembly, which is the main oil cylinder liquid passing structure.

The welding of the cylinder joint inlet pipe is a key step to ensure the normal operation of the hydraulic system. Its importance is mainly reflected in the following aspects:

(1) Ensure sealing: The quality of welding is directly related to the sealing performance of the hydraulic system. If the welding is not firm, it may cause hydraulic oil leakage, thus affecting the working efficiency and stability of the system.

(2) Withstand pressure: The hydraulic system will generate high pressure when working. The strength of the welding parts needs to be sufficient to withstand this pressure, otherwise it may break or fall off, causing a safety accident.

(3) Prevent pollution: Good welding can prevent pollutants from entering the hydraulic system, keep the hydraulic oil clean, and extend the service life of the system.

However, in the traditional assembly welding process of the liquid inlet pipe joint, the welding operation usually requires the welder to manually mark the assembly on the oil cylinder, fix the liquid inlet pipe joint on the outer circle of the oil cylinder, and change the angle for welding many times. This process is time-consuming and labor-intensive, and due to the interference of the welding position, there are position limitations, which may lead to unstable welding quality. Moreover, when the welder welds the liquid inlet pipe joint assembly, the manual marking and assembly welding may cause a certain amount of movement between the liquid inlet pipe and the joint, which in turn leads to unstable welding of the liquid inlet pipe joint assembly, reduced welding quality, reduced work efficiency and product qualification rate.

Summary of the invention

1. Technical issues to be resolved

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an assembly tool and a method of use for welding the liquid inlet pipe joint of the oil cylinder, which solves the problem that the current traditional assembly welding of the liquid inlet pipe joint requires the welder to manually mark and align the liquid inlet pipe joint on the oil cylinder, which has position limitations during welding and leads to reduced welding quality. In addition, when the welder welds the liquid inlet pipe joint assembly, manual marking and aligning may cause a certain amount of movement between the liquid inlet pipe and the joint, thereby causing unstable welding of the liquid inlet pipe joint assembly, reduced welding quality, and reduced work efficiency and product qualification rate.

(II) Technical solution

In order to achieve the above object, the main technical solutions adopted by the present invention include:

In the first aspect, the present invention provides an assembly tool and a method of use for welding a cylinder liquid inlet pipe joint, comprising a joint for welding to a liquid inlet pipe, and also comprising a rotating device and a positioning clamping device; the rotating device comprises a turntable and a driving member for driving the turntable to rotate; the positioning clamping device comprises a first positioning clamping component, a second positioning clamping component and a supporting component, the supporting component is fixedly mounted on the top of the turntable and is located at the outer edge of the turntable, the first positioning clamping component is fixedly mounted on the outer wall of the supporting component, the second positioning clamping component is fixedly mounted on the top of the turntable, the second positioning clamping component can clamp the joint, the first positioning clamping component makes the liquid inlet pipe cooperate with the joint, and the first positioning clamping component, the second positioning clamping component, the liquid inlet pipe, the stop of the joint and the axis of the turntable coincide.

Preferably, the support assembly includes a hydraulic cylinder and a mounting plate, and the mounting plate is fixedly mounted on the top of the extended end of the hydraulic cylinder; the first positioning clamping assembly includes a positioning part and a telescopic part; one end of the telescopic part is fixedly connected to the side wall of the mounting plate, and the other end is detachably connected to the positioning part, and the positioning part can be moved laterally along the telescopic part through the telescopic part; the hydraulic cylinder can drive the positioning part and the telescopic part to rise and fall to adapt to the liquid inlet pipes of different lengths.

Preferably, the positioning portion includes a positioning ring and a first T-shaped block; the positioning ring can be sleeved on the outer wall of the liquid inlet pipe and the first T-shaped block is fixedly installed on the outer wall of the positioning ring, and the end of the telescopic portion away from the mounting plate is provided with a first T-shaped groove matching with the first T-shaped block, the first T-shaped block and the first T-shaped groove are both vertically arranged and the top of the first T-shaped groove passes through the top of the telescopic portion, and the positioning ring can be inserted into the end of the telescopic portion away from the mounting plate through the cooperation of the first T-shaped block and the first T-shaped groove.

Preferably, the positioning portion comprises a positioning clamp; the positioning clamp is sleeved on the outer wall of the liquid inlet pipe and one end of the telescopic portion away from the mounting plate is detachably connected to the clamp by a bolt.

Preferably, the telescopic portion includes a sleeve and a movable plate; the movable plate is inserted into the sleeve, a second T-shaped groove is provided on the inner wall of the sleeve, a second T-shaped block corresponding to the second T-shaped groove is provided on the side wall of the movable plate, and the movable plate can move laterally along the sleeve in the sleeve through the cooperation of the second T-shaped block and the second T-shaped groove; the first T-shaped groove is opened at the end of the movable plate away from the sleeve.

Preferably, the first positioning clamping assembly also includes a first clamping portion and a mounting rod; the first clamping portion is fixedly mounted on the top of the fixed cylinder of the hydraulic cylinder through the mounting rod and the first clamping portion is located below the positioning portion, the liquid inlet pipe passes through the first clamping portion and the first clamping portion can clamp the liquid inlet pipe.

Preferably, the first clamping portion includes a first chuck and a plurality of first claws; the plurality of first claws are circumferentially arrayed on the top of the first chuck and the plurality of first claws can simultaneously move toward the axial direction of the first chuck to centrally clamp the liquid inlet tube; the ends of the plurality of first claws facing the liquid inlet tube are all arranged in an arc shape and the arcs of the plurality of first claws are all provided with a first buffer pad.

Preferably, the second positioning clamping assembly includes a second clamping portion; the second clamping portion is located below the first clamping portion, the bottom of the second clamping portion is fixedly connected to the top of the turntable, the joint is located inside the second clamping portion, and the second clamping portion can clamp and center the joint.

Preferably, the second clamping portion includes a second chuck and a plurality of second claws; the plurality of second claws are circumferentially arrayed on the top of the second chuck and the plurality of second claws can simultaneously move toward the axial direction of the second chuck, and a second buffer pad is provided at one end of the second claw facing the joint.

On the other hand, the present invention provides a method for using an assembly tool for welding a fluid inlet pipe joint of an oil cylinder, comprising the following steps:

S1: Firstly, the rotating device, the first positioning and clamping assembly, the second positioning and clamping assembly and the supporting assembly are installed;

S2: After the installation is completed, the joint is placed in the second positioning and clamping assembly, with the stopper of the joint facing upward, and the second positioning and clamping assembly positions, centers and clamps the joint;

S3: vertically passing the liquid inlet pipe through the first positioning and clamping assembly from above the first positioning and clamping assembly and corresponding to the stopper of the joint, and the first positioning and clamping assembly simultaneously positions and centers the liquid inlet pipe;

S4: After the liquid inlet pipe and the joint are aligned and clamped, a welding gun performs annular welding on the stopper of the liquid inlet pipe and the joint;

S5: After welding is completed, the welded joint and the liquid inlet pipe are taken out;

S6: looping steps S1 to S5 to complete welding of the plurality of liquid inlet pipes and the plurality of joints.

(III) Beneficial effects

The beneficial effects of the present invention are:

The present invention can realize the positioning and clamping of the liquid inlet pipe by setting the first positioning and clamping assembly, and can realize the positioning and clamping of the joint by setting the second positioning and clamping assembly. When the liquid inlet pipe and the joint are assembled, the joint is placed in the second positioning and clamping assembly, and the second positioning and clamping assembly positions and clamps the joint. The liquid inlet pipe is passed through the first positioning and clamping assembly to position the liquid inlet pipe, so that the axis of the liquid inlet pipe is consistent with the axis of the stop of the joint, which is convenient for matching with the stop of the joint. The liquid inlet pipe is positioned by the first positioning clamping assembly, so that when the liquid inlet pipe and the joint are welded, there is no need to manually mark the welding point between the liquid inlet pipe and the joint, making welding more convenient and improving welding work efficiency; at the same time, the liquid inlet pipe is clamped by the first positioning clamping assembly, which can prevent the liquid inlet pipe from moving, thereby preventing the unstable welding between the liquid inlet pipe and the joint from resulting in low welding quality and poor welding effect, thereby improving the qualified rate of the product; and, the driving member drives the turntable to rotate, thereby driving the first positioning clamping assembly and the second positioning clamping assembly to rotate, which can drive the liquid inlet pipe and the joint to rotate, thereby realizing annular welding of the liquid inlet pipe and the joint, so as not to be limited by the welding position, thereby improving welding efficiency and welding quality.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall three-dimensional structure of an assembly tool for welding a fluid inlet pipe joint of an oil cylinder and a method of using the assembly tool;

FIG2 is a schematic diagram of the overall three-dimensional structure of a rotating device of an assembly tool for welding a fluid inlet pipe joint of a cylinder and a method of using the present invention;

FIG3 is a schematic diagram of the overall three-dimensional disassembly structure of the positioning part and the telescopic part of an assembly tool for welding a cylinder liquid inlet pipe joint and a method of using the present invention;

4 is a schematic diagram of the overall three-dimensional disassembled structure of the positioning part and the telescopic part of another embodiment of an assembly tool for welding a cylinder liquid inlet pipe joint and a method of using the present invention.

[Description of Reference Numerals]

1: liquid inlet pipe; 2: joint; 3: rotating device; 31: turntable; 32: driving member; 4: positioning and clamping device; 41: first positioning and clamping assembly; 411: positioning part; 4111: positioning ring; 4112: first T-block; 4113: positioning clamp; 412: telescopic part; 4121: first T-slot; 4122: sleeve; 4123: moving plate; 4124: second T-slot; 4125: second T-block; 413: first clamping part; 4131: first chuck; 4132: first claw; 414: mounting rod; 42: second positioning and clamping assembly; 421: second clamping part; 4211: second chuck; 4212: second claw; 43: supporting assembly; 431: hydraulic cylinder; 432: mounting plate.

Detailed ways

In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

Embodiment 1

As shown in FIGS. 1-3 , an assembly tool for welding a cylinder liquid inlet pipe joint in this embodiment includes a joint 2 for welding to a liquid inlet pipe 1 , and also includes a rotating device 3 and a positioning clamping device 4 .

Specifically, the rotating device 3 includes a turntable 31 and a driving member 32 for driving the turntable 31 to rotate; the positioning and clamping device 4 includes a first positioning and clamping assembly 41, a second positioning and clamping assembly 42 and a supporting assembly 43, the supporting assembly 43 is fixedly mounted on the top of the turntable 31 and is located at the outer edge of the turntable 31, the first positioning and clamping assembly 41 is fixedly mounted on the outer wall of the supporting assembly 43, the second positioning and clamping assembly 42 is fixedly mounted on the top of the turntable 31, the second positioning and clamping assembly 42 can clamp the joint 2, the first positioning and clamping assembly 41 makes the liquid inlet pipe 1 cooperate with the joint 2, and the first positioning and clamping assembly 41, the second positioning and clamping assembly 42, the liquid inlet pipe 1, the stopper of the joint 2 and the axis of the turntable 31 coincide. By setting the first positioning and clamping assembly 41, the liquid inlet pipe 1 can be positioned and clamped, and by setting the second positioning and clamping assembly 42, the joint 2 can be positioned and clamped. When the liquid inlet pipe 1 and the connector 2 are assembled, the connector 2 is placed in the second positioning clamping assembly 42, the second positioning clamping assembly 42 positions and clamps the connector 2, and the liquid inlet pipe 1 is passed through the first positioning clamping assembly 41 to position the liquid inlet pipe 1 so that the axis of the liquid inlet pipe 1 is consistent with the axis of the stop of the connector 2, which is convenient for matching with the stop of the connector 2. The liquid inlet pipe 1 is positioned by the first positioning clamping assembly 41, so that when the liquid inlet pipe 1 and the joint 2 are welded, there is no need to manually mark the welding point between the liquid inlet pipe 1 and the joint 2, which makes welding more convenient and improves the welding work efficiency; at the same time, the liquid inlet pipe 1 is clamped by the first positioning clamping assembly 41, which can prevent the liquid inlet pipe 1 from moving, thereby preventing the unstable welding between the liquid inlet pipe 1 and the joint 2 resulting in low welding quality and poor welding effect, thereby improving the qualified rate of the product; and, the turntable 31 is driven to rotate by the driving member 32, thereby driving the first positioning clamping assembly 41 and the second positioning clamping assembly 42 to rotate, which can drive the liquid inlet pipe 1 and the joint 2 to rotate, thereby realizing the annular welding of the liquid inlet pipe 1 and the joint 2, so as not to be limited by the welding position, thereby improving the welding efficiency and welding quality.

Furthermore, the support assembly 43 includes a hydraulic cylinder 431 and a mounting plate 432, and the mounting plate 432 is fixedly mounted on the top of the protruding end of the hydraulic cylinder 431; the first positioning clamping assembly 41 includes a positioning portion 411 and a telescopic portion 412; one end of the telescopic portion 412 is fixedly connected to the side wall of the mounting plate 432, and the other end is detachably connected to the positioning portion 411, and the positioning portion 411 can be moved laterally along the telescopic portion 412 through the telescopic portion 412. By setting the positioning part 411 and the telescopic part 412, it is possible to realize the positioning of the liquid inlet pipe 1, and by the telescopic part 412 being detachably connected to the positioning part 411, it is possible to realize the replacement of the positioning part 411 for liquid inlet pipes 1 of different specifications. Since the outer diameters of liquid inlet pipes 1 of different specifications are different, when replacing different positioning parts 411, in order to make the axis of the liquid inlet pipe 1 always coincide with the axis of the turntable 31, the telescopic part 412 is set to be able to extend or retract different lengths for liquid inlet pipes 1 of different specifications, so as to adapt to the positioning of liquid inlet pipes 1 of different specifications. The hydraulic cylinder 431 can drive the positioning part 411 and the telescopic part 412 to rise and fall to adapt to liquid inlet pipes 1 of different lengths. Since the lengths of the liquid inlet pipes 1 are different, the hydraulic cylinder 431 is set to realize the vertical lifting of the positioning part 411 and the telescopic part 412, so as to realize the welding of liquid inlet pipes 1 of different lengths and the joint 2.

Specifically, as shown in FIG3 , the positioning portion 411 includes a positioning clamp 4113; the positioning clamp 4113 is sleeved on the outer wall of the liquid inlet pipe 1 and one end of the telescopic portion 412 away from the mounting plate 432 is detachably connected to the clamp by a bolt. When replacing the positioning clamp 4113, it is only necessary to remove the positioning clamp 4113 and install a positioning clamp 4113 of the same specification as the liquid inlet pipe 1 at the end of the telescopic portion 412 to complete the replacement of the positioning clamp 4113, which is more convenient and easier to operate.

More specifically, the telescopic portion 412 includes a sleeve 4122 and a movable plate 4123; the movable plate 4123 is inserted into the sleeve 4122, a second T-shaped groove 4124 is provided on the inner wall of the sleeve 4122, and a second T-shaped block 4125 corresponding to the second T-shaped groove 4124 is provided on the side wall of the movable plate 4123. The movable plate 4123 can be moved along the sleeve in the sleeve 4122 through the cooperation of the second T-shaped block 4125 and the second T-shaped groove 4124. The first T-shaped groove 4121 is provided at one end of the movable plate 4123 away from the sleeve 4122, which can limit the moving direction of the movable plate 4123 in the sleeve 4122. In addition, it is explained here that relatively adaptive grooves and protrusions are provided on the sleeve 4122 and the movable plate 4123, so as to limit the moving distance of the movable plate 4123 and prevent the movable plate 4123 from escaping from the sleeve 4122. By providing the sleeve 4122 and the movable plate 4123, the movable plate 4123 can be moved in the sleeve 4122, so that when the positioning rings 4111 of different specifications are replaced, the outer diameters of the positioning rings 4111 of different specifications can be adapted, thereby changing the length of the telescopic portion 412.

Furthermore, the first positioning and clamping assembly 41 also includes a first clamping portion 413 and a mounting rod 414; the first clamping portion 413 is fixedly mounted on the top of the fixed cylinder of the hydraulic cylinder 431 through the mounting rod 414 and the first clamping portion 413 is located below the positioning portion 411, the liquid inlet pipe 1 passes through the first clamping portion 413 and the first clamping portion 413 can clamp the liquid inlet pipe 1, thereby clamping the liquid inlet pipe 1 to prevent the liquid inlet pipe 1 from moving when being welded to the joint 2, thereby preventing the quality of the welding between the liquid inlet pipe 1 and the joint 2 from being poor.

Specifically, the first clamping portion 413 includes a first chuck 4131 and a plurality of first claws 4132; the plurality of first claws 4132 are circumferentially arrayed on the top of the first chuck 4131 and the plurality of first claws 4132 can simultaneously move toward the axial direction of the first chuck 4131 to center and clamp the liquid inlet pipe 1. The liquid inlet pipe 1 can be clamped by providing a chuck and a plurality of claws, and the plurality of first claws 4132 can make it more stable and more secure when clamping the liquid inlet pipe 1, and can also assist in centering. Preferably, the ends of the plurality of first claws 4132 facing the liquid inlet pipe 1 are all set to be arc-shaped and the arcs of the plurality of first claws 4132 are all provided with first buffer pads. By setting the end of the first claw 4132 facing the liquid inlet tube 1 into an arc shape, it can adapt to the outer wall shape of the liquid inlet tube 1, making it more stable when clamping the liquid inlet tube 1. By setting a buffer pad at the arc of the first claw 4132, the first claw 4132 can provide a buffering force to the liquid inlet tube 1 when clamping the liquid inlet tube 1, and at the same time protect the liquid inlet tube 1, avoid the strong rigidity between the liquid inlet tube 1 and the first claw 4132, and avoid damage to the outer wall of the liquid inlet tube 1.

Furthermore, the second positioning clamping assembly 42 includes a second clamping portion 421; the second clamping portion 421 is located below the first clamping portion 413, the bottom of the second clamping portion 421 is fixedly connected to the top of the turntable 31, the connector 2 is located inside the second clamping portion 421, and the second clamping portion 421 can clamp the connector 2 to achieve centering of the position of the connector 2, and when the liquid inlet pipe 1 and the connector 2 are welded, the second clamping portion 421 can clamp more stably to keep the connector 2 stationary.

Specifically, the second clamping portion 421 includes a second chuck 4211 and a plurality of second claws 4212; the plurality of second claws 4212 are circumferentially arrayed on the top of the second chuck 4211 and the plurality of second claws can simultaneously move toward the axial direction of the second chuck 4211, and a second buffer pad is provided at one end of the second claw 4212 facing the joint 2. By providing the second chuck 4211 and the second claw 4212, stable clamping and centering of the joint 2 can be achieved, the second claw 4212 can move simultaneously to center and clamp the joint 2, so that the axis of the stop of the joint 2 coincides with the axis of the turntable 31, and by providing the second buffer pad, the second claw 4212 can also provide a buffer force to the joint 2 when centering and clamping the joint 2, and protect the outer wall of the joint 2 from damage.

A method for using an assembly tool for welding a fluid inlet pipe joint of a cylinder according to this embodiment includes the following steps:

S1: First, assemble the device, and then install the positioning ring 4111 of the same specification as the liquid inlet pipe 1 to be welded on the moving plate 4123;

S2: After all installations are completed, the connector 2 is placed in the second chuck 4211, with the stopper of the connector 2 facing upward, and the second clamping claws 4212 are driven to position, center and clamp the connector 2;

S3: Then the liquid inlet pipe 1 is vertically passed through the positioning ring 4111 and the first chuck 4131 in sequence until it contacts the stopper of the connector 2, and the plurality of first clamping claws 4132 are driven to center and clamp the liquid inlet pipe 1, so that the axes of the liquid inlet pipe 1 and the stopper of the connector 2 coincide with each other;

S4: After the positions of the liquid inlet pipe 1 and the joint 2 are stabilized, a hand-held welding gun or an automatic welding gun can be used to perform circular welding on the liquid inlet pipe 1 and the joint 2 to complete the assembly of the liquid inlet pipe 1 and the joint 2;

S5: After welding is completed, the plurality of first clamping claws 4132 and the plurality of second clamping claws 4212 are driven to move in a direction away from the liquid inlet pipe 1 and the joint 2, so that the liquid inlet pipe 1 and the joint 2 can be separated therefrom, so as to take out the welded joint 2 and the liquid inlet pipe 1;

S6: When welding the liquid inlet pipe 1 and the joint 2 of different specifications, it is only necessary to replace the positioning ring 4111, and then cycle through the steps S1 to S5;

S7: looping steps S1 to S6 to complete welding of the plurality of liquid inlet pipes 1 and the plurality of joints 2.

Embodiment 2

As shown in Figure 4, different from the first embodiment, the positioning portion 411 in this embodiment includes a positioning ring 4111 and a first T-shaped block 4112; the positioning ring 4111 can be sleeved on the outer wall of the liquid inlet pipe 1 and the first T-shaped block 4112 is fixedly installed on the outer wall of the positioning ring 4111, and the end of the telescopic portion 412 away from the mounting plate 432 is provided with a first T-shaped groove 4121 that cooperates with the first T-shaped block 4112, the first T-shaped block 4112 and the first T-shaped groove 4121 are both vertically arranged and the top of the first T-shaped groove 4121 passes through the top of the telescopic portion 412, and the positioning ring 4111 can be inserted into the end of the telescopic portion 412 away from the mounting plate 432 through the cooperation of the first T-shaped block 4112 and the first T-shaped groove 4121. By setting the positioning ring 4111 and the first T-shaped block 4112, the telescopic part 412 can be detachably installed, the structure is simple, the installation operation is convenient, and the positioning ring 4111 of different specifications can be replaced more quickly, thereby improving the work efficiency. It should be noted that it is not limited to setting the first T-shaped block 4112 on the positioning ring 4111, and the telescopic part 412 is provided with a first T-shaped groove 4121 matched with the first T-shaped block 4112. The first T-shaped groove 4121 can also be set on the positioning ring 4111, and the first T-shaped block 4112 matched with the first T-shaped groove 4121 can be set on the telescopic part 412, or other clamping structures can be provided.

In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims (10)

1. The assembly fixture for welding the oil cylinder liquid inlet pipe joint comprises a joint (2) for welding with a liquid inlet pipe (1), and is characterized by further comprising a rotating device (3) and a positioning and clamping device (4);

the rotating device (3) comprises a turntable (31) and a driving piece (32) for driving the turntable (31) to rotate;

The positioning and clamping device (4) comprises a first positioning and clamping assembly (41), a second positioning and clamping assembly (42) and a supporting assembly (43), wherein the supporting assembly (43) is fixedly installed at the top of the rotary table (31) and located at the outer edge of the rotary table (31), the first positioning and clamping assembly (41) is fixedly installed on the outer wall of the supporting assembly (43), the second positioning and clamping assembly (42) is fixedly installed at the top of the rotary table (31), the second positioning and clamping assembly (42) can clamp the joint (2), the first positioning and clamping assembly (41) enables the liquid inlet pipe (1) to be matched with the joint (2), and the first positioning and clamping assembly (41), the second positioning and clamping assembly (42) and the spigot of the joint (2) are overlapped with the axis of the rotary table (31).

2. The assembly fixture for welding a hydro-cylinder liquid inlet pipe joint as defined in claim 1, wherein:

The support assembly (43) comprises a hydraulic cylinder (431) and a mounting plate (432), wherein the mounting plate (432) is fixedly arranged at the top of the extending end of the hydraulic cylinder (431);

The first positioning and clamping assembly (41) comprises a positioning part (411) and a telescopic part (412);

One end of the telescopic part (412) is fixedly connected with the side wall of the mounting plate (432), the other end of the telescopic part is detachably connected with the positioning part (411), and the positioning part (411) can move along the telescopic part (412) transversely through the telescopic part (412);

The hydraulic cylinder (431) can drive the positioning part (411) and the telescopic part (412) to lift so as to adapt to the liquid inlet pipes (1) with different lengths.

3. The assembly fixture for welding the oil cylinder liquid inlet pipe joint as claimed in claim 2, wherein:

the positioning part (411) comprises a positioning ring (4111) and a first T-shaped block (4112);

The utility model discloses a liquid inlet pipe, including installation board (432) and locating ring (4111), locating ring (4111) can be located on the outer wall of feed liquor pipe (1) just first T shape piece (4112) fixed mounting in on the outer wall of locating ring (4111), the one end that keeps away from of telescopic portion (412) be equipped with first T shape piece (4112) matched with first T shape groove (4121), first T shape piece (4112) with first T shape groove (4121) all vertically set up just the top of first T shape groove (4121) runs through the top of telescopic portion (412), locating ring (4111) can pass through first T shape piece (4112) with the cooperation of first T shape groove (4121) is inserted and is located one end that is kept away from of telescopic portion (412) mounting panel (432).

4. The assembly fixture for welding the oil cylinder liquid inlet pipe joint as claimed in claim 2, wherein:

the positioning part (411) comprises a positioning clamp (4113);

the positioning clamp (4113) is sleeved on the outer wall of the liquid inlet pipe (1), and one end, far away from the mounting plate (432), of the telescopic part (412) is detachably connected with the clamp through a bolt.

5. An assembly fixture for welding a hydro-cylinder inlet pipe joint as defined in claim 3, wherein:

the telescopic part (412) comprises a sleeve (4122) and a moving plate (4123);

The moving plate (4123) is inserted into the sleeve (4122), a second T-shaped groove (4124) is formed in the inner wall of the sleeve (4122), a second T-shaped block (4125) corresponding to the second T-shaped groove (4124) is formed in the side wall of the moving plate (4123), and the moving plate (4123) can move in the sleeve (4122) along the transverse direction of the sleeve (4122) through the cooperation of the second T-shaped block (4125) and the second T-shaped groove (4124);

the first T-shaped groove (4121) is arranged at one end of the moving plate (4123) far away from the sleeve (4122).

6. The assembly fixture for welding the oil cylinder liquid inlet pipe joint as claimed in claim 2, wherein:

The first positioning clamping assembly (41) further comprises a first clamping part (413) and a mounting rod (414);

The first clamping part (413) is fixedly installed on the top of the fixed cylinder of the hydraulic cylinder (431) through the installation rod (414), the first clamping part (413) is located below the positioning part (411), and the liquid inlet pipe (1) passes through the first clamping part (413) and the first clamping part (413) can clamp the liquid inlet pipe (1).

7. The assembly fixture for welding the oil cylinder liquid inlet pipe joint as claimed in claim 6, wherein:

The first clamping part (413) comprises a first chuck (4131) and a plurality of first clamping jaws (4132);

The first clamping jaws (4132) are circumferentially arrayed on the top of the first chuck (4131) and the first clamping jaws (4132) can move towards the axial direction of the first chuck (4131) at the same time so as to clamp the liquid inlet pipe (1) in a centering manner;

One ends of the first clamping claws (4132) facing the liquid inlet pipe (1) are arc-shaped, and first buffer cushions are arranged at the arc-shaped positions of the first clamping claws (4132).

8. The assembly fixture for welding the oil cylinder liquid inlet pipe joint as claimed in claim 7, wherein:

the second positioning clamping assembly (42) comprises a second clamping part (421);

the second clamping part (421) is located below the first clamping part (413), the bottom of the second clamping part (421) is fixedly connected with the top of the turntable (31), the joint (2) is located inside the second clamping part (421), and the second clamping part (421) can clamp and center the joint (2).

9. The assembly fixture for welding the oil cylinder liquid inlet pipe joint as claimed in claim 8, wherein:

The second clamping part (421) comprises a second chuck (4211) and a plurality of second claws (4212);

the second clamping jaws (4212) are circumferentially arranged at the top of the second chuck (4211) and can move towards the axis direction of the second chuck (4211) at the same time, and one end of each second clamping jaw (4212) towards the joint (2) is provided with a second buffer pad.

10. A method of using an assembly fixture for welding a cylinder inlet pipe joint according to any one of claims 1 to 9, comprising the steps of:

S1: firstly, mounting the rotating device (3), the first positioning and clamping assembly (41), the second positioning and clamping assembly (42) and the supporting assembly (43);

s2: after the installation is finished, the joint (2) is placed in the second positioning and clamping assembly (42), the spigot of the joint (2) faces upwards, and the second positioning and clamping assembly (42) performs positioning and centering clamping on the joint (2);

S3: vertically penetrating the liquid inlet pipe (1) from the upper part of the first positioning clamping assembly (41) through the first positioning clamping assembly (41) and corresponding to the spigot of the joint (2), and positioning and centering the liquid inlet pipe (1) by the first positioning clamping assembly (41);

s4: after the centering and clamping of the liquid inlet pipe (1) and the joint (2) are completed, the welding gun performs annular welding on the liquid inlet pipe (1) and the seam allowance of the joint (2);

s5: after the welding is finished, the welded joint (2) and the welded liquid inlet pipe (1) are taken out;

s6: and (3) circulating the steps S1 to S5 to finish the welding of the liquid inlet pipes (1) and the joints (2).