Screw pump multi-station automatic assembly production line and assembly method

Abstract

The invention relates to a screw pump multi-station automatic assembly production line and an assembly method. The automatic production line is characterized by comprising an on-line station, an assembly station, a turnover press-fitting station, a turnover assembly station, an engraving assembly station, a turnover off-line station and a conveying line body, and the on-line station, the assembly station, the turnover press-fitting station, the turnover assembly station, the engraving assembly station and the turnover off-line station are sequentially arranged along the conveying line body; a plurality of accompanying tool plates are arranged on the conveying line body, a traveling crane used for hoisting a vacuum pump shell is arranged on the on-line station, a cantilever crane is arranged on the assembly station, and turnover mechanisms are arranged on the turnover press-fitting station, the turnover assembly station and the turnover off-line station. The overturning press-fitting station and the overturning assembly station are each provided with a jacking rotating mechanism and a guardrail, the overturning press-fitting station is further provided with a press-fitting machine, and the overturning off-line station is further provided with a jacking translation mechanism. The overturning and press-fitting device is reasonable in structural design, integrates overturning and press-fitting functions, and can improve the assembly efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid machinery assembly, and specifically to a multi-station automated assembly production line and assembly method for screw pumps, which is particularly suitable for the automated assembly production of rotary positive displacement pumps such as screw pumps that require multi-station flipping, press-fitting and precision assembly. Background Art

[0002] In the screw pump manufacturing industry, traditional assembly methods primarily rely on manual labor and fixed workstations, resulting in the following technical challenges: low assembly efficiency and insufficient automation. Traditional methods utilize single-station or segmented assembly, requiring multiple handling of components such as the screw pump body, rotor, and bearings, leading to long production cycles and low efficiency. Key processes (such as bearing press-fitting and rear cover plate alignment) suffer from poor assembly consistency, making them prone to misassembly and missing components. The complex flipping process compromises assembly accuracy. Screw pumps require multiple flips (such as 180° and 90°) during assembly to complete assembly on different sides. Traditional methods utilize a crane combined with manual flipping, resulting in low positioning accuracy and safety hazards. Furthermore, flipped components (such as bearings and sealing rings) may shift, impacting the quality of subsequent press-fitting. Material flow is poorly integrated, resulting in low production line balance. Reliance on manual handling or forklift transfers between processes creates numerous material flow interruptions, leading to uneven production line cycles and limited production capacity.

[0003] Therefore, there is a great need for an integrated multifunctional assembly line that can flip, press, and mark to improve assembly efficiency and quality. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a multi-station automated assembly production line and assembly method for screw pumps with a reasonable structural design, integrated flipping and pressing functions, and the ability to improve assembly efficiency and quality.

[0005] The technical solution adopted by the present invention to solve the above problems is: the structural feature of the multi-station automatic assembly production line of the screw pump is that it includes an online station, an assembly station, a flipping and pressing station, a flipping assembly station, an engraving assembly station, a flipping and offline station and a conveyor line body, and the online station, assembly station, flipping and pressing station, flipping assembly station, engraving assembly station and flipping and offline station are arranged in this order along the conveyor line body, and the conveyor line body is provided with a number of accompanying tooling plates, the online station is provided with a crane for lifting the vacuum pump casing, the assembly station is provided with a cantilever crane, the flipping and pressing station, flipping assembly station and flipping and offline station are all provided with a flipping mechanism, the flipping and pressing station and flipping assembly station are both provided with a jacking and rotating mechanism and a guardrail, the flipping and pressing station is also provided with a press, and the flipping and offline station is also provided with a jacking and translation mechanism.

[0006] Preferably, the accompanying tooling plate of the present invention includes: a middle plate; a plurality of support rods vertically arranged on the middle plate; a mold fixed to the top of the support rods; a mold upper support fixed to the top of the mold, the mold upper support and the mold together constitute a contoured support surface for matching the shape of the vacuum pump to limit the translation and rotational freedom of the vacuum pump in the X-axis and Y-axis and the rotational freedom in the Z-axis; guide wheels installed on the four corners of the middle plate, and the guide wheels are fixed by guide wheel nuts.

[0007] Preferably, the on-line station, assembly station, flip pressing station, flip assembly station, engraving assembly station and flip off-line station of the present invention are all provided with a tool plate, and the tool plate is fixed to the ground on one side of the conveyor line body by bolts.

[0008] Preferably, the flipping mechanisms in the flipping press-fitting station, the flipping assembly station and the flipping offline station of the present invention are all mounted on the conveyor line body through columns.

[0009] Preferably, the engraving assembly station of the present invention is provided with a nameplate engraving machine.

[0010] An assembly method for a multi-station automated assembly production line for a screw pump is characterized in that the steps are as follows: the on-line station uses a crane to lift the vacuum pump housing to an accompanying tooling plate and completes the stud installation of the vacuum pump housing; the assembly station uses a cantilever crane to sequentially install the rotor, gearbox and cover plate; the flipping and pressing station is equipped with a press machine and a jacking and rotating mechanism, first assembling the coupling and oil-slinging plate, and then flipping it 180 degrees to press-install key components such as bearings and sleeves; the flipping assembly station completes the assembly of the cover plate and motor, and the engraving assembly station uses a nameplate engraving machine to laser engrave the nameplate, affix a logo and install a water joint; the flipping and offline station adjusts the posture of the vacuum pump housing by a flipping mechanism, transfers it to the offline area via a jacking and translation mechanism, and finally hoisted it to a pallet by a crane.

[0011] Preferably, in the present invention, after the accompanying tooling plate is moved to the assembly station, the rotor portion of the vacuum pump housing is first installed with cylindrical pins and O-rings, then the rotor portion is installed, then the gear box cylindrical pins and O-rings are installed, and finally the gear box cover is installed.

[0012] Preferably, in the present invention, when the accompanying tooling plate moves to the flipping mechanism of the flipping and pressing station, the coupling and the oil-slinging plate are first installed, and then the vacuum pump housing is flipped 180° by the flipping mechanism. Then, when the accompanying tooling plate moves to the press at the flipping and pressing station, the shaft sleeve, piston ring and bearing seat are installed in sequence; then the bearing is placed in the bearing hole at the exhaust end, and then the press is used to press the bearing to the bottom; then the wave spring and the bearing pressure plate are installed; finally, the axial stopper and the oil-slinging ring are installed.

[0013] Preferably, in the present invention, when the accompanying tooling plate moves to the flipping assembly station, the vacuum pump housing is flipped 180° by the flipping mechanism and then the rear cover plate and the motor are assembled; when the accompanying tooling plate moves to the nameplate engraving machine at the engraving assembly station, the nameplate engraving machine is used to number and engrave the nameplate, and the nameplate is assembled, the sticker is posted, and the water joint is installed.

[0014] Preferably, in the present invention, when the accompanying tooling plate moves to the flipping offline station, the vacuum pump housing has been assembled into a pump body. First, the pump body is rotated 90° by the line body rotation mechanism, and then the pump body is flipped 90° by the flipping mechanism. The accompanying tooling plate returns to the online station through the automatic rotation station; the pump body is placed on the jacking and translation mechanism, and then translated to the middle offline position by the jacking and translation mechanism, and finally the screw pump is hoisted onto the pallet using a crane to complete the offline process.

[0015] Compared with the existing technology, the present invention has the following advantages and effects: the assembly efficiency of the screw pump is improved, the assembly accuracy is effectively guaranteed through workstation coordination and automatic flipping, and the pressing force is controllable; the accompanying tooling plate is reasonably designed and the changeover time is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention and / or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments and / or the description of the prior art. 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 paying any creative work.

[0017] Figure 1 It is a three-dimensional structural diagram of a multi-station automated assembly production line for screw pumps in an embodiment of the present invention.

[0018] Figure 2 It is a schematic top view of the structure of a multi-station automated assembly production line for screw pumps in an embodiment of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the on-line station in an embodiment of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the assembly station in an embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the flip pressing station in an embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the flip assembly station in an embodiment of the present invention.

[0023] Figure 7It is a schematic diagram of the three-dimensional structure of the flipping off-line station in an embodiment of the present invention.

[0024] Figure 8 It is a schematic diagram of the main structure of the accompanying tooling plate in an embodiment of the present invention.

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the accompanying tooling plate in an embodiment of the present invention.

[0026] Figure 10 It is a structural schematic diagram of an embodiment of the present invention in which a vacuum pump is placed on a portable tooling plate.

[0027] In the figure: 1-online station; 2-assembly station; 3-flipping and pressing station; 4-flipping assembly station; 5-engraving assembly station; 6-flipping and offline station; 7-conveyor line body; 71-vacuum pump housing; 13-travelling tooling plate; 11-crane; 12-tool plate; 21-cantilever crane; 31-pressing machine; 32-column; 33-lifting and rotating mechanism; 34-guardrail; 35-flipping mechanism; 61-lifting and translation mechanism; 71-vacuum pump; 721-mold support; 722-support rod; 723-guide wheel; 724-mold; 725-middle plate; 726-contoured support surface. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0029] Example

[0030] See also Figures 1 to 10 The multi-station automated assembly production line for screw pumps in this embodiment includes an on-line station 1, an assembly station 2, a flipping and pressing station 3, a flipping assembly station 4, a marking assembly station 5, a flipping off-line station 6 and a conveyor line 7, wherein the marking assembly station 5 is provided with a nameplate marking machine.

[0031] In this embodiment, the online station 1, assembly station 2, flip and press-fitting station 3, flip assembly station 4, engraving assembly station 5 and flip offline station 6 are arranged in this order along the conveyor line 7. Several accompanying tooling plates 13 are provided on the conveyor line 7. The online station 1 is provided with a crane 11 for hoisting the vacuum pump housing 71. The assembly station 2 is provided with a cantilever crane 21. The flip and press-fitting station 3, flip assembly station 4 and flip offline station 6 are all provided with a flipping mechanism 35. The flip and press-fitting station 3 and the flip assembly station 4 are all provided with a lifting and rotating mechanism 33 and a guardrail 34. The flip and press-fitting station 3 is also provided with a press machine 31. The flip offline station 6 is also provided with a lifting and translation mechanism 61.

[0032] The accompanying tooling plate 13 in this embodiment includes a mold upper support 721, support rods 722, guide wheels 723, a mold 724 and a middle plate 725, wherein the number of the support rods 722 is usually 4 to 12.

[0033] The support rods 722 in this embodiment are vertically mounted on the middle plate 725. Typically, the support rods 722 are evenly distributed around the middle plate 725. The mold 724 is fixed to the top of the support rods 722. The mold 724 is a detachable structure, such as being fixed to the top of the support rods 722 by snapping or screws. The detachable structure facilitates replacement of the mold 724, and the support rods 722 provide stable support for the mold 724.

[0034] In this embodiment, mold support 721 is typically made of a wear-resistant composite material and is fixed to the top of mold 724. Together, they form a contoured support surface 726 that matches the outer shape of vacuum pump housing 71, limiting the vacuum pump housing's 71's translational and rotational freedom along the X-axis, Y-axis, and Z-axis. Mold 724 is connected to mold support 721 above, and support rods 722 below, forming a complete positioning support system.

[0035] In this embodiment, the guide wheels 723 are mounted on the four corners of the middle plate 725 via guide wheel nuts. The guide wheel nuts are adjustable in height and provide a clearance fit with the stainless steel guide strips of the conveyor line. The guide wheels 723 cooperate with the guide strips of the conveyor line to achieve directional movement of the pallet 13, ensuring smooth movement along the predetermined trajectory. The pallet 13 is synchronously conveyed by the roller conveyor line.

[0036] In this embodiment, the loading station 1, assembly station 2, flip press-fitting station 3, flip assembly station 4, marking assembly station 5, and flip down-line station 6 are all provided with a tool plate 12, which is bolted to the ground on one side of the conveyor line 7. The flipping mechanisms 35 in the flip press-fitting station 3, flip assembly station 4, and flip down-line station 6 are generally mounted on the conveyor line 7 via columns 32.

[0037] The steps of the assembly method of the multi-station automated assembly production line for the screw pump in this embodiment are as follows: the on-line station 1 uses the crane 11 to hoist the vacuum pump housing 71 to the accompanying tooling plate 13, and completes the stud installation of the vacuum pump housing 71; the assembly station 2 uses the cantilever crane 21 to sequentially install the rotor, gear box and cover plate; the flipping and pressing station 3 is equipped with a pressing machine 31 and a jacking and rotating mechanism 33, first assembles the coupling and oil-slinging plate, flips 180° and then presses the bearings, sleeves and other key components; the flipping assembly station 4 completes the assembly of the cover plate and the motor, and the engraving assembly station 5 uses a nameplate engraving machine to laser engrave the nameplate, paste the logo and install the water joint; the flipping and offline station 6 adjusts the posture of the vacuum pump housing 71 through the flipping mechanism 35, transfers it to the offline area through the jacking and translation mechanism 61, and finally hoisted to the pallet by the crane 11.

[0038] In this embodiment, after the accompanying tooling plate 13 moves to the assembly station 2, the rotor part cylindrical pins and O-rings of the vacuum pump housing 71 are installed first, then the rotor part is installed, and then the gear box cylindrical pins and O-rings are installed, and finally the gear box cover is installed.

[0039] In this embodiment, when the accompanying tooling plate 13 moves to the flipping mechanism 35 of the flipping and pressing station 3, the coupling and the oil-slinging plate are installed first, and then the vacuum pump housing 71 is flipped 180° by the flipping mechanism 35. Then, the accompanying tooling plate 13 is moved to the press 31 of the flipping and pressing station 3, and the shaft sleeve, piston ring and bearing seat are installed in sequence; then the bearing is placed in the bearing hole at the exhaust end, and then the press 31 is used to press the bearing to the bottom; then the wave spring and the bearing pressure plate are installed; finally, the axial stopper and the oil-slinging ring are installed.

[0040] In this embodiment, when the accompanying tooling plate moves to the flipping assembly station 4, the vacuum pump housing 71 is flipped 180° by the flipping mechanism and the rear cover and motor are assembled; when the accompanying tooling plate moves to the nameplate engraving machine at the engraving assembly station 5, the nameplate engraving machine is used to engrave the nameplate with numbers, and the nameplate is assembled, the sticker is posted, and the water joint is installed.

[0041] In this embodiment, when the accompanying tooling plate moves to the flipping offline station 6, the vacuum pump housing 71 has been assembled into a pump body. First, the pump body is rotated 90° by the line body rotation mechanism, and then the pump body is flipped 90° by the flipping mechanism 35. The accompanying tooling plate 13 returns to the online station 1 through the automatic rotation station; the pump body is placed on the jacking and translation mechanism 61, and then the jacking and translation mechanism 61 translates it to the middle offline position, and finally the crane 11 is used to lift the screw pump onto the pallet to complete the offline process.

[0042] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. Any equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art of the technology to which the present invention belongs can make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A multi-station automatic assembly production line for screw pumps, characterized in that: The utility model comprises an on-line station (1), an assembly station (2), a flip press-fitting station (3), a flip assembly station (4), a marking assembly station (5), a flip off-line station (6) and a conveyor line body (7), wherein the on-line station (1), the assembly station (2), the flip press-fitting station (3), the flip assembly station (4), the marking assembly station (5) and the flip off-line station (6) are arranged in this manner along the conveyor line body (7), and the conveyor line body (7) is provided with a plurality of accompanying tooling plates (13). The on-line station (1) is provided with a useful The crane (11) is used to lift the vacuum pump housing (71), the assembly station (2) is provided with a cantilever crane (21), the flip pressing station (3), the flip assembly station (4) and the flip offline station (6) are all provided with a flip mechanism (35), the flip pressing station (3) and the flip assembly station (4) are both provided with a jacking rotation mechanism (33) and a guardrail (34), the flip pressing station (3) is also provided with a press (31), and the flip offline station (6) is also provided with a jacking translation mechanism (61).

2. A multi-station automatic assembly production line for screw pumps according to claim 1, characterized in that: The accompanying tooling plate (13) includes: a middle plate (725); a plurality of support rods (722) vertically arranged on the middle plate (725); a mold (724) fixed to the top of the support rods (722); a mold upper support (721) fixed to the top of the mold (724), wherein the mold upper support (721) and the mold (724) together constitute a contoured support surface (726) for matching the outer shape of the vacuum pump housing (71) to limit the translation and rotational freedom of the vacuum pump housing (71) in the X-axis and Y-axis and the rotational freedom in the Z-axis; and guide wheels (723) installed on the four corners of the middle plate (725), wherein the guide wheels (723) are fixed by guide wheel nuts.

3. The multi-station automatic assembly production line for screw pumps according to claim 1, characterized in that: The on-line station (1), assembly station (2), flip pressing station (3), flip assembly station (4), marking assembly station (5) and flip off-line station (6) are all provided with a tool plate (12), and the tool plate (12) is fixed to the ground on one side of the conveyor line body (7) by bolts.

4. The multi-station automatic assembly production line for screw pumps according to claim 1, characterized in that: The turning mechanisms (35) in the turning press-fitting station (3), the turning assembly station (4) and the turning down-line station (6) are all mounted on the conveyor line body (7) via columns (32).

5. The multi-station automatic assembly production line for screw pumps according to claim 1, characterized in that: The engraving assembly station (5) is provided with a nameplate engraving machine.

6. An assembly method for a screw pump multi-station automated assembly line according to any one of claims 1 to 5, characterized in that: The steps are as follows: the on-line station (1) uses a crane (11) to lift the vacuum pump housing (71) to the accompanying tooling plate (13) and completes the stud installation of the vacuum pump housing (71); the assembly station (2) uses a cantilever crane (21) to sequentially install the rotor, gearbox and cover plate; the flip press station (3) is equipped with a press machine (31) and a jacking and rotating mechanism (33), first assembles the coupling and the oil-slinging plate, flips 180 degrees and then presses the bearing and sleeve; the flip assembly station (4) completes the assembly of the cover plate and the motor, and the engraving assembly station (5) uses a nameplate engraving machine to laser engrave the nameplate, paste the logo and install the water joint; the flip offline station (6) adjusts the posture of the vacuum pump housing (71) through the flip mechanism (35), transfers it to the offline area through the jacking and translation mechanism (61), and finally hoisted to the pallet by the crane (11).

7. The assembly method of a multi-station automatic assembly line for a screw pump according to claim 6, characterized in that: When the accompanying tooling plate (13) moves to the assembly station (2), the rotor portion of the vacuum pump housing (71) is first installed with cylindrical pins and O-rings, then the rotor portion is installed, and then the gear box cylindrical pins and O-rings are installed, and finally the gear box cover is installed.

8. The assembly method of a multi-station automatic assembly line for a screw pump according to claim 6, characterized in that: When the accompanying tooling plate (13) moves to the turning mechanism (35) of the turning press station (3), first install the coupling and the oil-slinging plate, then turn the vacuum pump housing (71) 180 degrees through the turning mechanism (35), and then install the shaft sleeve, piston ring and bearing seat in sequence when the accompanying tooling plate (13) moves to the press (31) of the turning press station (3); then put the bearing into the bearing hole at the exhaust end, and then use the press (31) to press the bearing to the bottom; then install the wave spring and the bearing pressure plate; finally install the axial stopper and the oil-slinging ring.

9. The assembly method of a multi-station automatic assembly line for a screw pump according to claim 6, characterized in that: When the accompanying tooling plate moves to the flip assembly station (4), the vacuum pump housing (71) is flipped 180 degrees by the flip mechanism and then the rear cover and the motor are assembled; when the accompanying tooling plate moves to the nameplate engraving machine at the engraving assembly station (5), the nameplate is numbered and engraved using the nameplate engraving machine, and the nameplate is assembled, the sticker is posted, and the water joint is installed.

10. The assembly method of a multi-station automatic assembly line for a screw pump according to claim 6, characterized in that: When the accompanying tooling plate moves to the flipping downline station (6), the vacuum pump housing (71) has been assembled into a pump body. First, the pump body is rotated 90° by the line body rotation mechanism, and then the pump body is flipped 90° by the flipping mechanism (35). The accompanying tooling plate (13) returns to the upline station (1) through the automatic rotation station; the pump body is placed on the jacking and translation mechanism (61), and then the jacking and translation mechanism (61) translates it to the middle downline position. Finally, the crane (11) is used to lift the screw pump onto the pallet to complete the downline.

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