Assembly equipment and assembly method for sealing ring on workpiece

Abstract

The present invention discloses an assembly device and an assembly method for a sealing ring on a workpiece. The assembly device includes a base, a rotating swing arm, a first driving mechanism, a second driving mechanism, a third driving mechanism and a fourth driving mechanism. The rotating swing arm includes a rotating part and a supporting part. The rotating part includes a material collector and a placing part. The material collector includes a barrel, a push plate, a sealing ring and a moving part. Under the drive of the third driving mechanism, the moving part rotates to drive the push plate to move, and then drives the sealing ring to move until a sealing ring is sleeved on the outside of the first piston rod; under the drive of the fourth driving mechanism, the first driving mechanism and the sealing ring move until they move to above the preset position of the workpiece; under the drive of the first hydraulic cylinder, the first piston rod moves toward the preset position close to the workpiece, so that the sealing ring moves to the preset position. The assembly device provided by the present invention realizes the precise installation of the sealing ring on the workpiece, improves the yield rate, reduces waste, and improves the safety of operation.

Description

Technical Field

[0001] The invention relates to the field of mechanical manufacturing, and in particular to an assembly device and an assembly method for a sealing ring on a workpiece. Background Art

[0002] In the gate valve category of pipeline valves, the sealing ring and the valve body are two different parts. After rough machining, welding is required to make the two parts become a whole. The traditional process (commonly used at this stage) is to manually put the sealing ring into the valve seat after rough machining of the two parts, and connect them by manual welding. This method is not only inefficient and poor in precision, but also has certain harm to the operator's body. Summary of the invention

[0003] In order to solve the problems of the prior art, the present invention provides an assembly device and an assembly method for a sealing ring on a workpiece, which realizes automatic processing, improves installation accuracy, and improves production efficiency. The technical solution is as follows:

[0004] On the one hand, the present invention provides an assembly device for a sealing ring on a workpiece, which is used to assemble the sealing ring into the workpiece, and includes a base, a rotating swing arm, a first driving mechanism, a second driving mechanism, a third driving mechanism and a fourth driving mechanism, and the workpiece has a preset position for placing the sealing ring;

[0005] The first driving mechanism comprises a first hydraulic cylinder and a first piston rod assembly disposed in the first hydraulic cylinder, wherein the first piston rod assembly comprises a first piston and a first piston rod disposed under the first piston;

[0006] The rotating swing arm includes a rotating part and a supporting part, and the rotating part is rotatably connected to the supporting part; the rotating part includes a material collector and a placing part, and the placing part is provided with a workpiece to be processed, and the material collector includes a barrel, a push plate sleeved outside the barrel, a plurality of sealing rings arranged on the push plate, and a moving part connected to the third driving mechanism, and under the drive of the second driving mechanism, the material collector moves along the axial direction of the barrel to approach or move away from the first driving mechanism;

[0007] The push plate is connected to the moving member, the sealing ring, the barrel and the first hydraulic cylinder are all coaxially arranged, and under the drive of the third driving mechanism, the moving member rotates to drive the push plate to move toward the first driving mechanism, thereby driving the sealing ring to move until a sealing ring is sleeved on the outside of the first piston rod of the first driving mechanism;

[0008] The support portion is arranged on the base, the fourth driving mechanism is arranged on the support portion, the first driving mechanism is arranged on one side of the length direction of the fourth driving mechanism, and under the drive of the fourth driving mechanism, the first driving mechanism and the sealing ring sleeved on the outer side of the first piston rod both move toward the workpiece until the first driving mechanism and the sealing ring move to a first position above a preset position of the workpiece;

[0009] The first piston rod moves toward a preset position close to the workpiece, so that the sealing ring sleeved on the outer side of the first piston rod moves to the preset position on the workpiece.

[0010] Furthermore, a preset angle is maintained between the axis of the barrel and the vertical line.

[0011] Furthermore, the moving member is threadedly connected to the push plate, and the moving member is coaxially arranged with the barrel.

[0012] Furthermore, the first piston rod includes an upper rod and a lower rod arranged opposite to each other, the diameter of the upper rod is larger than the diameter of the lower rod, the lower rod is a structure narrowing from top to bottom, and the outer diameter of the upper end of the lower rod is slightly larger than the inner diameter of the sealing ring.

[0013] Furthermore, a protrusion is provided at the end of the barrel close to the first driving mechanism, and a guide hole for matching with the protrusion is provided in the first hydraulic cylinder of the first driving mechanism, and the guide hole is coaxially arranged with the moving part and the protrusion.

[0014] Furthermore, the second driving mechanism comprises a second hydraulic cylinder body, a second piston rod assembly is arranged in the inner cavity of the second hydraulic cylinder body, and the second piston rod assembly comprises a second piston and a second piston rod;

[0015] The third driving mechanism is a servo motor, and the third driving mechanism is arranged in the cylinder body of the second hydraulic cylinder. The third driving mechanism is connected to the second piston rod through a motor seat.

[0016] Furthermore, the fourth driving mechanism includes a fourth hydraulic cylinder body, a fourth piston rod assembly is arranged in the inner cavity of the fourth hydraulic cylinder body, the fourth piston rod assembly includes a fourth piston and a fourth piston rod, the fourth piston rod is connected to the first driving mechanism, and under the drive of the fourth driving mechanism, the first driving mechanism moves along the length direction of the fourth piston rod.

[0017] Furthermore, the assembly equipment also includes a transmission mechanism, under the transmission action of which the rotating part rotates relative to the supporting part; the transmission mechanism includes a worm gear, a worm matched with the worm gear, and a rotating shaft connected to the worm gear.

[0018] On the other hand, the present invention also provides an assembly method in which the assembly equipment conveys the sealing ring to a workpiece, wherein the workpiece has a preset position for placing the sealing ring, and the method comprises the following steps:

[0019] S1. In the initial state, the protrusion of the barrel is spaced from the first driving mechanism, and the second driving mechanism is used to provide an upward driving force, so that the material collector moves upward until the protrusion of the barrel is disposed in the guide hole of the first driving mechanism;

[0020] S2, using the third driving mechanism to provide an upward driving force to drive the push plate to move upward, thereby driving the sealing ring to move upward, until a sealing ring located at the upper end of the barrel is sleeved on the outer side of the first piston rod of the first driving mechanism, and then the collector returns to its original position;

[0021] S3, first using the fourth driving mechanism to provide a driving force to move toward the workpiece, driving the first driving mechanism and the sealing ring to move as a whole, until the sealing ring moves to a first position above the preset position of the workpiece, and then using the first hydraulic cylinder of the first driving mechanism to provide a downward driving force to press the sealing ring down to the preset position of the workpiece, thereby completing the assembly of the sealing ring;

[0022] S4. Utilize the fourth driving mechanism to provide a driving force to move away from the workpiece, so as to return the first driving mechanism.

[0023] Furthermore, after step S4, the following steps are also included:

[0024] S5. After the first driving mechanism returns to its original position, the rotating part rotates relative to the supporting part under the transmission action of the transmission mechanism, so that the workpiece rotates.

[0025] The beneficial effects brought by the technical solution provided by the present invention are as follows:

[0026] a. The assembly equipment for the sealing ring on the workpiece provided by the present invention can realize the accurate installation of the sealing ring on the workpiece, improve the yield, reduce waste, and improve the operation safety;

[0027] b. The assembly equipment for the sealing ring on the workpiece provided by the present invention realizes full digital control, realizes automatic processing, and is simple and convenient to operate, does not require manual operation nearby, reduces the labor intensity of workers, and improves work efficiency;

[0028] c. The assembly equipment for the sealing ring on the workpiece provided by the present invention can be applied to gate valves of different structures and has universality;

[0029] d. The assembly method of the sealing ring assembly equipment on the workpiece provided by the present invention is fast and the processing time is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a three-dimensional diagram of an assembly device for a sealing ring on a workpiece provided by an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of an initial state of an assembly device for a sealing ring on a workpiece provided by an embodiment of the present invention;

[0033] Figure 3 The present invention provides an assembly device for a sealing ring on a workpiece. Figure 2 An enlarged view of the first driving mechanism;

[0034] Figure 4 is an enlarged view of a sealing ring of an assembly device for a sealing ring on a workpiece provided by an embodiment of the present invention, in which the sealing ring is in conflict with a first piston rod of a first driving mechanism;

[0035] Figure 5 is a cross-sectional view of a sealing ring and a first driving mechanism of an assembly device for a sealing ring on a workpiece provided by an embodiment of the present invention moving to a first position above a preset position of the workpiece;

[0036] Figure 6 The present invention provides an assembly device for a sealing ring on a workpiece. Figure 5 A magnified image of;

[0037] Figure 7 is an enlarged view of a sealing ring of an assembly device for a sealing ring on a workpiece provided by an embodiment of the present invention moving to a preset position of the workpiece;

[0038] Figure 8 The present invention provides an assembly device for a sealing ring on a workpiece. Figure 7 A magnified image of;

[0039] Fig. 9 is a cross-sectional view of a gate valve provided by an embodiment of the present invention;

[0040] Fig.10 It is a half-section stereoscopic view of a gate valve provided by an embodiment of the present invention.

[0041] Among them, the figure marks include: 2-first driving mechanism, 21-first hydraulic cylinder, 22-first piston, 23-first piston rod, 24-guide hole, 3-second driving mechanism, 31-second hydraulic cylinder body, 32-second piston rod, 4-third driving mechanism, 51-fourth hydraulic cylinder body, 52-fourth piston rod, 6-barrel, 61-protrusion, 7-sealing ring, 8-push plate, 9-moving part, 10-workpiece, 11-rotating shaft, 12-worm gear, 13-worm, 14-connecting rod, 16-first housing, 17-placing part, 18-second housing, 19-valve seat. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0044] The assembly object (workpiece) of the assembly device provided by the present invention is a gate valve, and the assembly device is used to transfer the sealing ring to a preset position in the gate valve (see Fig. 9 The position indicated by A is Fig.10 The valve seat 19 is provided with a sealing ring, and the valve seat has two adjacent side surfaces, one of which is a circular surface and the other is a torus surface. During the processing, the workpiece (such as a gate valve) is fixedly arranged on the machine tool. The structure of the workpiece is shown in FIG. Fig. 9 .

[0045] In one embodiment of the present invention, a sealing ring assembly device for a workpiece is provided, which is used to assemble the sealing ring into the workpiece, such as Figure 1 and Figure 2As shown, the assembly equipment includes a base 1, a rotating swing arm, a first drive mechanism 2, a second drive mechanism 3, a third drive mechanism 4 and a fourth drive mechanism 5. The workpiece has a preset position for placing a sealing ring, and the preset position is a groove for placing the sealing ring on the workpiece.

[0046] The specific structure of the first driving mechanism 2 is as follows: Figure 2 , Figure 3 , Figure 4 The first driving mechanism 2 includes a first hydraulic cylinder 21, a first piston rod assembly is arranged in the inner cavity of the first hydraulic cylinder 21, the first piston rod assembly includes a first piston 22 and a first piston rod 23 arranged under the first piston 22, and the outer diameter of the first piston rod 23 is slightly smaller than or equal to the inner diameter of the sealing ring 7.

[0047] The rotating swing arm comprises a rotating part and a supporting part, and the rotating part is rotatably connected with the supporting part.

[0048] The specific structure of the rotating part is as follows: Figure 2 The rotating part includes a collector and a placement part 17 connected to the collector, and the placement part 17 is used to place the workpiece to be processed. The collector includes a barrel 6, a push plate 8 sleeved on the outside of the barrel 6, a plurality of sealing rings 7 arranged on the push plate 8 and a moving part 9 (a screw rod) connected to the third driving mechanism 4. The barrel is a hollow or solid cylindrical structure. Under the drive of the second driving mechanism 3, the collector moves axially along the barrel 6 to approach or move away from the first driving mechanism 2, and the third driving mechanism moves accordingly. When the sealing ring is assembled, the collector moves axially along the barrel 6 to approach the first driving mechanism 2 until a small distance is maintained between the collector and the first driving mechanism 2.

[0049] The barrel 6 is provided with a plurality of sealing rings 7 on its outer sleeve. The sealing rings 7, the barrel 6 and the first hydraulic cylinder 21 are all coaxially arranged. A push plate 8 is arranged under the sealing ring 7. The sealing ring and the barrel are both circular structures. The portion of the push plate 8 in contact with the barrel 6 can be an arc-shaped structure or a circular structure. The cross section of the push plate 8 is preferably an L-shaped structure. The push plate 8 is used to contact the sealing ring at the bottom and push the sealing ring to move upward. The push plate 8 is connected to a moving member 9. The push plate 8 is threadedly connected to the moving member 9. The moving member is a screw (such as a ball screw, which can convert rotary motion into linear motion). The screw has threads on the outside. The push plate 8 is connected to the moving member 9 through a nut. The rotation of the moving member drives the nut to move, and the movement of the nut drives the push plate to move upward (toward the first driving mechanism).

[0050] Driven by the third driving mechanism 4, the moving member 9 rotates (at this time, the moving member 9 will not move up and down, and the barrel is fixed) to drive the push plate 8 to move toward the first driving mechanism 2, thereby driving the sealing ring 7 to move until a sealing ring 7 is sleeved on the outside of the first piston rod 23 of the first driving mechanism 2 (only one sealing ring is moved each time). The outer cross-section of the first piston rod 23 is preferably an inverted L-shaped structure, that is, the first piston rod 23 is a structure that narrows from top to bottom. The first piston rod 23 includes an upper rod and a lower rod that are relatively arranged up and down. The diameter of the upper rod is larger than the diameter of the lower rod. The lower rod is a structure that narrows from top to bottom, that is, the diameter of the upper end of the lower rod is larger than the diameter of its lower end. Because the outer diameter of the upper end of the lower rod is slightly larger than the inner diameter of the sealing ring 7, when a sealing ring 7 is on the outside of the first piston rod 23, the upper end of the sealing ring 7 will contact the lower bottom surface of the upper rod and the outer wall of the lower rod, so that the sealing ring 7 will not fall off. See Figure 4 The lower rod plays a guiding role and facilitates the sealing ring to be sleeved outside the first piston rod 23, and also makes it convenient for the sealing ring to be separated from the first piston rod 23 when it reaches the preset position;

[0051] The material barrel 6 is detachably arranged in the material collector to facilitate taking it out to place the sealing ring.

[0052] When the second driving mechanism 3 drives the barrel 6 to move along its axial direction close to the first driving mechanism 2, the third driving mechanism 4 drives the moving member 9 to rotate around its own axis until the sealing ring 7 is sleeved on the outside of the first piston rod 23 of the first driving mechanism 2.

[0053] The support part is arranged on the base 1, and the base 1 is on the ground, and a distance is maintained between the support part and the ground to facilitate the rotation of the rotating part. The fourth driving mechanism 5 is arranged on the support part, and the fourth driving mechanism 5 is connected to the first driving mechanism 2 and arranged along the length direction of the fourth piston rod of the fourth driving mechanism 5. Under the drive of the fourth driving mechanism 5, the first driving mechanism 2 and the sealing ring 7 are both moved toward the direction close to the workpiece, so that the sealing ring 7 moves to the first position above the preset position (the first position is above the preset position and opposite to the preset position), and then under the drive of the first driving mechanism 2, the sealing ring 7 sleeved on the outside of the first piston rod 23 is separated from the first piston rod 23 of the first driving mechanism 2, and the sealing ring 7 moves to the preset position on the workpiece.

[0054] The material collector further comprises a second shell 18 for accommodating the barrel 6 and the second driving mechanism 3 . The third driving mechanism 4 is partially disposed in the second shell 18 . The cross section of the second shell 18 is preferably an L-shaped structure. The placement portion 17 is disposed on the second shell 18 .

[0055] The support portion includes a first housing 16 for accommodating the first drive mechanism 2 and the fourth drive mechanism 5. An outlet is provided at one end of the first housing 16 close to the second housing 18, so that the fourth drive mechanism 5 is connected to the first drive mechanism 2 through the connecting rod 14. An outlet is provided at one end of the second housing 18 away from the fourth drive mechanism 5. When the sealing ring 7 is sleeved on the outer side of the first piston rod 23 of the first drive mechanism 2, the first drive mechanism 2 moves toward the workpiece through the outlet of the second housing 18 under the drive of the fourth drive mechanism 5.

[0056] Due to the special structure of the gate valve, the groove of the valve seat on which the sealing ring is placed is set at an angle, and the groove needs to be set coaxially with the sealing ring. Therefore, a preset angle is maintained between the axis of the barrel 6 and the vertical line (Y-axis, vertical plane). The angle has no range limit and is set according to the groove angle of the valve seat on the gate valve.

[0057] In one embodiment provided by the present invention, the end of the barrel 6 close to the first driving mechanism 2 is provided with a protrusion 61, and the protrusion 61 is preferably a tapered structure narrowing from bottom to top. A guide hole 24 for matching with the protrusion 61 is provided in the first hydraulic cylinder 21 of the first driving mechanism 2. The guide hole 24 is coaxially arranged with the moving member 9 and the protrusion 61, and the guide hole 24 is preferably a tapered structure narrowing from bottom to top. The upper end of the moving member 9 is preferably a tapered structure narrowing from bottom to top. When the barrel moves upward, the protrusion 61 enters the guide hole 24. The guide hole is provided to play a guiding role on the one hand and a limiting role on the other hand to prevent the barrel from further conflicting with the first driving mechanism and causing damage.

[0058] The specific structure of the second driving mechanism 3 is as follows: Figure 2 The second driving mechanism 3 is preferably a hydraulic cylinder, which includes a second hydraulic cylinder body 31. A second piston rod assembly is arranged in the inner cavity of the second hydraulic cylinder body 31. The second piston rod assembly includes a second piston and a second piston rod 32. Driven by the second driving mechanism 3, the collector moves along its axial direction toward or away from the first driving mechanism 2.

[0059] The specific structure of the third driving mechanism 4 is as follows: the third driving mechanism 4 is a servo motor, the third driving mechanism 4 is arranged in the second hydraulic cylinder body 31, and the third driving mechanism 4 is connected to the push plate through the motor seat. When the second driving mechanism 3 drives the barrel to move, the third driving mechanism 4 can be driven to move.

[0060] The specific structure of the fourth driving mechanism 5 is as follows: the fourth driving mechanism includes a fourth hydraulic cylinder body 51, and a fourth piston rod assembly is arranged in the inner cavity of the fourth hydraulic cylinder body 51. The fourth piston rod assembly includes a fourth piston and a fourth piston rod. The fourth piston rod is connected to the first driving mechanism 2 through a connecting rod 14, so that the fourth driving mechanism 5 drives the first driving mechanism 2 to move along the length direction of the fourth piston rod 52 (towards the workpiece or away from the workpiece) until the sealing ring 7 moves to a first position above the preset position, and then under the drive of the first driving mechanism 2, the first piston rod 23 moves in the direction of the preset position close to the workpiece, and presses the sealing ring 7 sleeved on the outer side of the first piston rod 23 down to the preset position. Because the interference between the valve seat and the sealing ring at the preset position in the gate valve is relatively large (the friction between the outer ring of the sealing ring and the inner wall of the valve seat is greater than the friction between the inner ring of the sealing ring and the outer wall of the first piston rod 23), the sealing ring is fastened to the valve seat. When the first driving mechanism 2 returns to a position away, the sealing ring will not be taken away, the operation is simple, and the placement position accuracy is high, the degree of automation is high, and the production efficiency is high.

[0061] Furthermore, the connecting rod 14 is arranged along the length direction of the fourth hydraulic cylinder body 51 as a guide for the fourth drive mechanism, so that the fourth piston rod 52 moves along the length direction of the fourth hydraulic cylinder body 51 without deviation, thereby enabling the first drive mechanism 2 to move along the length direction of the fourth drive mechanism 5 without deviation.

[0062] The assembly equipment also includes a transmission mechanism, see Figure 2 Under the transmission action of the transmission mechanism, the rotating part rotates relative to the supporting part. During the rotation process, the first driving mechanism and the fourth driving mechanism do not rotate, and the rotating part (which includes the second shell 18, the collector, the placement part, the second driving mechanism, and the third driving mechanism) rotates relative to the first shell 16, and the first shell 16 is fixed. The purpose of the rotation is that there are multiple positions on a workpiece where a sealing ring needs to be placed. When one position (such as Fig. 9 After placing the sealing ring (indicated by A in the figure), the rotating part is rotated so that another position on the workpiece (such as Fig. 9 The transmission mechanism is preferably a worm wheel 12, a worm 13 matched with the worm wheel 12, and a rotating shaft 11 connected with the worm wheel 12. The worm wheel 12 and the worm 13 cooperate to drive the rotating shaft to rotate, thereby driving the rotating part to rotate. The rotation angle is determined by the rotation angle of the worm wheel.

[0063] On the other hand, the present invention also provides an assembly method for conveying a sealing ring to a workpiece using the assembly device, wherein the workpiece has a preset position (such as Fig. 9 A and B), which comprises the following steps:

[0064] S1. In the initial state, the protrusion of the barrel 6 maintains a large distance from the first drive mechanism 2 (see Figure 2 and Figure 3 ), using the second driving mechanism 3 to provide an upward driving force, the collector moves upward until the protrusion 61 of the barrel 6 is disposed in the guide hole 24 of the first driving mechanism 2, at which time a small distance is maintained between the barrel and the first piston rod of the first driving mechanism 2;

[0065] S2, the material collector is stationary, and the third driving mechanism is used to provide an upward driving force. The moving member rotates to drive the push plate to move upward, and then drives the sealing ring to move upward, until a sealing ring 7 located at the upper end of the barrel 6 is sleeved on the outer side of the first piston rod 23 of the first driving mechanism 2, see Figure 4 , and then the collector returns to its position;

[0066] S3, first use the fourth driving mechanism 5 to provide a driving force to move toward the workpiece, driving the first driving mechanism 2 and the sealing ring 7 to move as a whole, until the sealing ring 7 moves to the first position above the preset position of the workpiece, see Figure 5 and Figure 6 , and then use the hydraulic oil (hydraulic water or compressed air) in the first hydraulic cylinder of the first driving mechanism 2 to provide a downward driving force to drive the first piston rod 23 to move downward (the first hydraulic cylinder is provided with an oil filling port, and the first hydraulic cylinder is connected with the hydraulic mechanism through the oil filling port. Under the drive of the hydraulic mechanism, the hydraulic oil enters the first hydraulic cylinder through the oil filling port to push the first piston rod 23 to move downward), press the sealing ring 7 down to the preset position of the workpiece, and complete the assembly of the sealing ring 7, see Figure 7 and Figure 8 ;

[0067] S4, using the fourth driving mechanism 5 to provide a driving force to move away from the workpiece, so that the first driving mechanism 2 returns to its original position;

[0068] S5, after the first driving mechanism 2 returns to its original position, the rotating part rotates relative to the supporting part under the transmission action of the transmission mechanism, so that the workpiece rotates, for example, by 180°, and another position on the workpiece where the sealing ring is to be placed (such as Fig. 9 B) Move to this position (such as Fig. 9 Below A).

[0069] The assembly equipment for sealing rings on workpieces provided by the present invention can realize accurate installation of sealing rings on workpieces, improve the yield rate, reduce waste, and improve operational safety; the assembly equipment for sealing rings on workpieces provided by the present invention realizes full digital control, realizes automatic processing, and is simple and convenient to operate, does not require manual operation nearby, reduces the labor intensity of workers, and improves work efficiency; the assembly equipment for sealing rings on workpieces provided by the present invention can be applied to gate valves of different structures and has universality; the assembly method for the assembly equipment for sealing rings on workpieces provided by the present invention is fast and the processing time is short.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembly device for a sealing ring on a workpiece, used for assembling the sealing ring into the workpiece, characterized in that: It comprises a base, a rotating swing arm, a first drive mechanism (2), a second drive mechanism (3), a third drive mechanism (4) and a fourth drive mechanism, and a workpiece (10) has a preset position for placing a sealing ring; The first driving mechanism (2) comprises a first hydraulic cylinder (21) and a first piston rod assembly, wherein the first piston rod assembly comprises a first piston (22) and a first piston rod (23) arranged under the first piston (22); The rotating swing arm comprises a rotating part and a supporting part, wherein the rotating part is rotatably connected to the supporting part; the rotating part comprises a material collector and a placing part (17), wherein the placing part (17) is provided with a workpiece to be processed, the material collector comprises a barrel (6), a moving part (9), a pushing plate (8) arranged outside the barrel (6), and a plurality of sealing rings (7) arranged on the pushing plate (8), and under the drive of the second driving mechanism (3), the material collector moves along the axial direction of the barrel (6) to approach or move away from the first driving mechanism (2); The push plate (8) is connected to the moving member (9). Under the drive of the third driving mechanism (4), the moving member (9) rotates to drive the push plate (8) to move, thereby driving the sealing ring (7) to move, until a sealing ring (7) is sleeved on the outer side of the first piston rod (23) of the first driving mechanism (2); The support portion is arranged on the base, the fourth drive mechanism is arranged on the support portion, the first drive mechanism (2) is arranged on one side of the length direction of the fourth drive mechanism, and under the drive of the fourth drive mechanism, the first drive mechanism (2) and the sealing ring (7) sleeved on the outside of the first piston rod (23) are both moved to a first position above a preset position of the workpiece; The first piston rod (23) can move toward a preset position close to the workpiece until the sealing ring (7) sleeved on the outside of the first piston rod (23) moves to a preset position on the workpiece (10); A preset angle is maintained between the axis of the barrel (6) and the vertical line; The moving member (9) is threadedly connected to the push plate (8), and the moving member (9), the sealing ring (7), the barrel (6) and the first hydraulic cylinder (21) are all coaxially arranged; The barrel (6) is provided with a protrusion (61) at the end close to the first driving mechanism (2), and a guide hole (24) for matching with the protrusion (61) is provided in the first hydraulic cylinder (21) of the first driving mechanism (2), and the guide hole (24) is coaxially arranged with the moving part (9) and the protrusion (61).

2. The assembly device for sealing rings on workpieces according to claim 1, characterized in that: The first piston rod (23) comprises an upper rod and a lower rod which are arranged opposite to each other in upper and lower directions. The diameter of the upper rod is larger than the diameter of the lower rod. The lower rod is a structure which narrows from top to bottom. The outer diameter of the upper end of the lower rod is slightly larger than the inner diameter of the sealing ring (7).

3. The assembly equipment for sealing rings on workpieces according to claim 1, characterized in that: The second driving mechanism (3) comprises a second hydraulic cylinder body (31), a second piston rod assembly is arranged in the inner cavity of the second hydraulic cylinder body (31), and the second piston rod assembly comprises a second piston and a second piston rod (32); The third drive mechanism (4) is a servo motor, the third drive mechanism (4) is arranged in the second hydraulic cylinder body (31), and the third drive mechanism (4) is connected to the second piston rod (32) via a motor seat.

4. The assembly device for sealing rings on workpieces according to claim 1, characterized in that: The fourth driving mechanism comprises a fourth hydraulic cylinder body (51), a fourth piston rod assembly is arranged in the inner cavity of the fourth hydraulic cylinder body (51), the fourth piston rod assembly comprises a fourth piston and a fourth piston rod (52), the fourth piston rod (52) is connected to the first driving mechanism (2), and under the drive of the fourth driving mechanism, the first driving mechanism (2) moves along the length direction of the fourth piston rod (52).

5. The assembly equipment for sealing rings on workpieces according to claim 1, characterized in that: The assembly equipment also includes a transmission mechanism, under the transmission action of which the rotating part rotates relative to the supporting part; the transmission mechanism includes a worm wheel (12), a worm (13) matched with the worm wheel (12), and a rotating shaft (11) connected to the worm wheel (12).

6. An assembly method for conveying a sealing ring to a workpiece using the assembly equipment according to any one of claims 1 to 5, wherein the workpiece has a preset position for placing the sealing ring, characterized in that: The following steps are involved: S1. In the initial state, the protrusion of the barrel is spaced from the first driving mechanism, and the second driving mechanism is used to provide an upward driving force, so that the material collector moves upward until the protrusion of the barrel is disposed in the guide hole of the first driving mechanism; S2, using the third driving mechanism to provide an upward driving force to drive the push plate to move upward, thereby driving the sealing ring to move upward, until a sealing ring located at the upper end of the barrel is sleeved on the outer side of the first piston rod of the first driving mechanism, and then the collector returns to its original position; S3, first using the fourth driving mechanism to provide a driving force to move toward the workpiece, driving the first driving mechanism and the sealing ring to move as a whole, until the sealing ring moves to a first position above a preset position of the workpiece, and then using the first hydraulic cylinder of the first driving mechanism to provide a downward driving force to press the sealing ring down to the preset position on the workpiece, thereby completing the assembly of the sealing ring; S4. Utilize the fourth driving mechanism to provide a driving force to move away from the workpiece, so as to return the first driving mechanism.

7. The assembly method of the sealing ring assembly equipment for the workpiece according to claim 6, characterized in that: After step S4, the method further includes the following steps: S5. After the first driving mechanism returns to its original position, the rotating part rotates relative to the supporting part under the transmission action of the transmission mechanism, so that the workpiece rotates.

Images