CN111894894A

CN111894894A - Impeller and welding forming device

Info

Publication number: CN111894894A
Application number: CN202010829231.9A
Authority: CN
Inventors: 汪卫平; 唐子一; 王子骏; 平伟伟; 李建新; 吴海洋; 占洋洋; 汪渌
Original assignee: Anhui Kaite Pump Co ltd
Current assignee: Anhui Kaite Pump Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2020-11-06

Abstract

The invention provides an impeller and a welding forming device, which comprises a bottom plate, blades and a cover plate, wherein the bottom plate and the blades are integrally injection-molded, the front side surfaces of the blades are smooth surfaces, and the cover plate is welded on the front side surfaces of the blades; the impeller comprises a bottom plate, blades and a cover plate, the cover plate and the blades are integrally injection-molded, the rear side surfaces of the blades are smooth surfaces, and the bottom plate is welded on the rear side surfaces of the blades; the impeller forming units of the two schemes are welded into an impeller assembly through a welding device.

Description

Impeller and welding forming device

Technical Field

The invention relates to an impeller and a welding forming device thereof, in particular to a forming structure and a welding forming device of the impeller of a pump.

Background

Centrifugal pump transport media are extremely common in industrial and agricultural production. Considering the characteristics of the conveyed medium, the plastic pump is selected to meet the requirement of conveying corrosive medium, and the impeller is also made of plastic. Injection molding is an extremely conceivable scheme in the impeller forming scheme, but how to machine the impeller is still a long-standing problem in the industry due to structural limitations of the impeller and considerations of forming efficiency.

In the prior art, the name of Chinese patent document is 'combination welding type water pump impeller and forming method thereof' (the publication number is CN102996502A), and in order to solve the technical problem called by the background technology, the technical scheme adopted is that the combination welding type water pump impeller is formed by welding a hub 7, a reinforcing plate 6 and a plurality of impeller lobes 8; each impeller clack 8 consists of a rear cover plate clack 3, a blade 2 and a front cover plate clack 1, and the rear cover plate clack 3, the blade 2 and the front cover plate clack 1 are punched into a three-dimensional impeller clack 8 by a plate in a special die; the edge line of each back cover plate petal 3 is butted with the intersection line of the blade of the other back cover plate petal and the back cover plate petal to form a back welding seam 4, the edge line of each front cover plate petal is butted with the intersection line of the blade of the other front cover plate petal and the front cover plate petal to form a front welding seam 5, each impeller petal 8 is welded into a whole by welding rods outside the welding seams, and then the hub 7 and the reinforcing plate 6 are welded, thus obtaining the welded impeller of the invention. The core of the scheme is that the impeller petals 8 are firstly manufactured by stamping, and then a plurality of impeller petals 8 are welded in the circumferential direction to form a complete impeller.

Another patent document entitled "intermittent ultrasonic welding impeller" (publication number CN207485730U) includes an impeller body 2 and a cover plate 1, wherein blades 4 are distributed on the inner side surface of the impeller body 2, and the blades 4 are arc-shaped structures and are distributed around the circumference of the central hole of the impeller body 2; the cover plate 1 covers the impeller body 2 and clamps the blades 4 between the impeller body and the impeller body; specifically, referring to an enlarged part of fig. 1, welding ribs 6 are arranged on the surface of the blade 4, the welding ribs 6 are distributed on the surface of the blade 4 at intervals, and the width of the welding ribs 6 is narrower than that of the blade 4 and forms a stepped structure with the blade 4; referring to fig. 2 specifically, the inner side surface of the cover plate 1 is distributed with welding grooves 3 matched with the profiles of the blades 4; as can be seen from fig. 3, the welding ribs 6 are inserted into the welding grooves 3, and the height of the welding ribs 6 is higher than the depth of the welding grooves 3, so that a certain interference magnitude is formed, and cold joint is avoided; the blade 4 is blocked at the notch part of the welding groove 3 to play a role in positioning, and the welding rib and the welding groove are fixed together through ultrasonic welding.

In the two schemes, the former has a plurality of unit pieces and large welding workload, the unit pieces, namely the impeller lobes 8, need to be positioned and welded independently, the positioning time is serious, and positioning errors are easily caused, and the impeller lobes 8 are formed by punching, so that the impeller is suitable for the impeller made of metal plates, the impeller made of plastic materials cannot be suitable, and the impeller lobes 8 are required to comprise the rear cover plate lobe 3, the blades 2 and the front cover plate lobe 1, so the impeller lobes 8 are formed by injection molding, and the mold is already complicated; the scheme provided by the latter can be used for welding and processing the plastic impeller, however, firstly, welding ribs 6 are arranged on the surface of the formed blade 4, and welding grooves 3 matched with the profile of the blade 4 are distributed on the inner side surface of the cover plate 1, so that not only is the structure of a forming die of a part complicated, but also the document does not disclose a corresponding welding fixture, and how to ensure uniform welding seams in the length direction of the blade is unknown, so that the welding quality is questionable.

Disclosure of Invention

The invention aims to provide an impeller, which ensures the welding quality of a connecting part so as to ensure the integral quality of the impeller.

The impeller comprises a bottom plate, blades and a cover plate, wherein the bottom plate and the blades are integrally injection-molded, the front side surfaces of the blades are smooth surfaces, and the cover plate is welded on the front side surfaces of the blades; the impeller comprises a bottom plate, blades and a cover plate, the cover plate and the blades are integrally molded through injection, the rear side surfaces of the blades are smooth, and the bottom plate is welded on the rear side surfaces of the blades.

It is a further object of the present invention to provide a welding apparatus for welding the above-described impeller members to form a high quality impeller.

The technical scheme is that the impeller welding device is characterized in that a bottom plate clamp and a cover plate clamp which are used for restraining and fixing a bottom plate and a cover plate are arranged on a rack, at least one of the bottom plate clamp and the cover plate clamp is arranged on a guide rail of the rack, a moving driving mechanism drives the bottom plate clamp and the cover plate clamp to move towards or away from each other, a heating plate is further arranged on the rack, one side of the heating plate is a plate-type heating plate, the other side of the heating plate is a blade-type heating plate, the arrangement mode of the heating plate is consistent with the arrangement mode of blades on an impeller, and the heating plate is respectively positioned in an area where the bottom plate clamp and the cover plate clamp are opposite to each.

The impeller provided by the invention is composed of two unit parts, namely the impeller is formed by welding the blade and the bottom plate through injection molding into a whole or welding the blade and the cover plate through injection molding into a whole and the bottom plate. In addition, the welding device has the advantages of simple structure, accurate and reliable positioning, and simple separation operation of the impeller welding finished product and the welding device.

Drawings

FIGS. 1a, 1b and FIGS. 1c, 1d are schematic structural views of two exploded forms of impeller members according to the present invention, respectively;

FIG. 2 is a block diagram of a machine-formed impeller;

FIG. 3 is a schematic view of the welding apparatus of the present invention;

FIG. 4 is a right side view of the heating plate of FIG. 3;

FIG. 5 is a left side view of FIG. 4;

fig. 6 and 7 are partially enlarged views of fig. 3.

Detailed Description

Example 1

As shown in fig. 3, the shape and structure of the impeller molded product are not substantially different from those of the prior art, and the present invention is to first process the unit parts and then weld them to obtain the impeller product. The unit parts are formed in two ways, namely, the blade 2 is firstly integrally injection-molded with the bottom plate 1 or the blade 2 and the cover plate 3, and then is welded with the other unit part.

As shown in fig. 1a and 1b, the impeller comprises a bottom plate 1, a blade 2 and a cover plate 3, wherein the bottom plate 1 and the blade 2 are integrally injection molded, a front side surface 2a of the blade 2 is a smooth surface, and the cover plate 3 is welded on the front side surface 2a of the blade 2.

As shown in fig. 1c and 1d, the cover plate 3 and the blade 2 are integrally injection molded, and the base plate 1 is welded to the rear side surface 2b of the blade 2, and the rear side surface 2b is a smooth surface.

The smooth surface refers to a substantially smooth plane or curved surface, and does not need to be additionally provided with a remarkable convex and concave structure, and even the smooth surface is regarded as a smooth surface when the smooth surface is generally smooth or has proper roughness.

In both of the two schemes, the impeller is decomposed into two unit parts and then welded into a product, the welded part is either the rear side surface 2b of the blade 2 or the front side surface 2a of the blade 2, the part needing hot melting is the convenient heating part, and the quality can be ensured by implementing hot melting welding. In particular, the decomposition schemes of the two unit parts are very beneficial to the injection molding of each unit part, one molding die is simple, and the other molding die is easy to demould.

Example 2

As shown in fig. 3, in the impeller welding apparatus, a base plate clamp 20 and a cover plate clamp 30 for restraining a fixed base plate 1 and a cover plate 3 are provided on a frame 10, at least one of the base plate clamp 20 and the cover plate clamp 30 is provided on a guide rail 11 of the frame 10, a movement driving mechanism drives the base plate clamp 20 and the cover plate clamp 30 to move toward or away from each other, the frame 10 is further provided with a heating plate 40, one side of the heating plate 40 is a plate-type heating plate 41, the other side is a blade-type heating plate 42, the arrangement of the heating plate 42 is consistent with the arrangement of the blades 2 on the impeller, and the heating plate 40 is respectively located in an area where the base plate clamp 20 and the cover plate clamp 30 are opposite to each other or deviated outside the area where the base.

The welding mode adopted by the invention is that the blade 2 and the cover plate 3 are respectively heated in a static mode by the heating plate 40, then the heating plate 40 is removed, the blade 2 and the cover plate 3 are driven to be close to and contacted with each other, and then the melting areas of the blade 2 and the cover plate 3 are fused and cooled into a whole to realize welding.

In the present invention, the heating plate 40 includes two heating surfaces, one of which is a plate-type heating plate 41, the plate-type heating plate 41 may be a complete continuous plane or curved surface, or may be a plane or curved surface distributed in a split manner, as long as the heating surface thereon can heat the side portion of the blade 2 on the bottom plate 1 correspondingly, and of course, the heating surface has a curved surface consistent with the spatial posture of the side portion of the blade 2, and here, it can also be understood that the contour of the plate-type heating plate 41 conforms to the contour of the region where the side edge of the blade is located; the other side of the heating plate 40 is a blade-type heating plate 42, and the heating surface of the blade-type heating plate 42 is the side surface of the upper blade 421, which completely coincides with the connection area of the blade 2 on the product impeller and the cover plate 3, that is, the melting area of the blade-type heating plate 42 applied on the cover plate 3 is the area that will contact with the melting area of the front side of the blade 2, and the rest part on the cover plate 3 still maintains the initial molding state.

Preferably, the heating plate 40 is connected with a bracket 43, and the lower end of the bracket 43 is provided with a semicircular, V-shaped or U-shaped claw 431 with downward opening, and the claws 431 are respectively clamped on the guide rails 11 which are horizontally arranged in parallel. As shown in fig. 3, the jaws 431 are formed in an open shape, so that the jaws can be conveniently matched with the guide rail 11 for positioning, and the heating plate 40 can be conveniently and directly removed from the guide rail 11.

Another scheme is to select the heating plate 40 to perform dislocation in a swinging manner to realize avoidance, namely the heating plate 40 is connected with a support 43, one end of the lower part of the support 43 is provided with a semicircular, V-shaped or U-shaped claw 431 with a downward opening, the claws 431 are respectively clamped on one guide rail 11 which is horizontally arranged in parallel and has a circular cross section, and the other end of the claw 431 is provided with a connecting hole to be in cross-penetrating rotary fit with the other guide rail 11. This solution can be seen in fig. 3 and 4, but one of the jaws 431 is provided as a sleeve.

As shown in fig. 6, the bottom plate clamp 20 includes a positioning shaft 21, the positioning shaft 21 is connected to a connecting hole on the bottom plate 1 through a key 212, a threaded hole 211 is formed at a shaft end of the positioning shaft 21, a bolt 213 is connected to the threaded hole 211, and a head of the bolt 213 is pressed against a step surface of the connecting hole on the bottom plate 1. The above solution provides a secure fixation of the base plate 1, i.e. the key 212 defines the freedom of circumferential rotation of the base plate 1 and the bolt 213 defines the possibility of axial displacement of the base plate 1.

As shown in fig. 4, the cover plate 3 also needs to be fixed in position and posture when being heated and welded with the blade 2, the middle part of the cover plate clamp 30 is a tube body 31, the protruding section of the tube body 31 is provided with an external thread 311, and the external thread 311 is connected with a threaded hole 3a in the middle part of the cover plate 3.

The cover 3 is first attached to the tubular body 31 of the cover holder 30, and the position of the cover 3 on the cover holder 30 remains stable, since there is only an axial force and no circumferential torque during heating.

After the heating plate 40 finishes the melting of the welding parts of the cover plate 3 and the blade 2, the heating plate 40, the cover plate 3 and the bottom plate 1 are axially displaced to realize the separation, so the circumferential positions of the cover plate 3 and the bottom plate 1 are still determined, after the heating plate 40 is offset and avoided, the cover plate 3 and the bottom plate 1 are axially moved to be close to each other until contacting and keeping the contact pressure, and the melting areas are cooled and fused to be connected into a whole.

In order to ensure good positioning and facilitate displacement, as shown in the figure, two guide rails 11 arranged horizontally in parallel are arranged between the two end supports of the frame 10, and the lower parts of the bottom plate clamp 20 and the cover plate clamp 30 are respectively provided with two

guide sleeves

22 and 32 which are in cross-insertion type movable fit with the two guide rails 11.

The two guide rails 11 are arranged at the same height, the lower side surface of one guide rail 11 is provided with a rack 111, the lower part of the cover plate clamp 30 is provided with a hand wheel 32, and the inner end of a wheel shaft 321 connected with the hand wheel 32 is provided with a gear meshed with the rack 111 to form a movement driving mechanism.

After the cover plate 3 and the blades 2 are welded and connected into a whole and cooled, a long-rod inner hexagonal sleeve is inserted from one side of the outer end of the pipe body 31 and reaches the bolt 213, the bolt 213 is unscrewed, the axial constraint between the base plate 1 and the positioning shaft 21 is removed, the hand wheel 32 is rotated to drive the cover plate clamp 30 to move rightwards, as shown in fig. 3, the base plate 1, the blades 2 and the cover plate 3 move rightwards along with the cover plate clamp 30 as a whole, the key groove on the connecting hole on the base plate 1 is separated from the key 212, then the impeller formed by the base plate 1, the blades 2 and the cover plate 3 is rotated, the threaded hole 3a in the middle of the cover plate 3 on the impeller is separated from the convex extending section of the pipe body 31 through the.

The above embodiment is described by the solution that the blade 2 is injection molded on the floor panel 1, and if the blade 2 is injection molded on the cover panel 3, the above solution is still possible, but it is necessary to appropriately modify the shape of the heating surface of the panel-type heating pan 41 on the heating plate 40 and the blade side profile of the panel-type heating pan 42, and the heating object of the panel-type heating pan 41 is the floor panel 1, and the heating object of the panel-type heating pan 41 is the blade side attached to the cover panel 3.

Claims

1. The utility model provides an impeller, includes bottom plate (1), blade (2) and apron (3), its characterized in that: the base plate (1) and the blades (2) are integrally formed in an injection molding mode, the front side faces (2a) of the blades (2) are smooth faces, and the cover plate (3) is welded to the front side faces (2a) of the blades (2).

2. The utility model provides an impeller, includes bottom plate (1), blade (2) and apron (3), its characterized in that: the cover plate (3) and the blade (2) are integrally molded through injection, the rear side face (2b) of the blade (2) is a smooth face, and the bottom plate (1) is welded on the rear side face (2b) of the blade (2).

3. The utility model provides an impeller welding set which characterized in that: a bottom plate clamp (20) and a cover plate clamp (30) for restraining a fixed bottom plate (1) and a cover plate (3) are arranged on a rack (10), at least one of the bottom plate clamp (20) and the cover plate clamp (30) is arranged on a guide rail (11) of the rack (10), a mobile driving mechanism drives the bottom plate clamp (20) and the cover plate clamp (30) to move close to or away from each other, a heating plate (40) is also arranged on the rack (10), a plate-type heating plate (41) is arranged on one side of the heating plate (40), a blade-type heating plate (42) is arranged on the other side of the heating plate (40), and the arrangement mode of the heating plate (42) is consistent with the arrangement mode of, the heating plate (40) is located in the region where the base plate jig (20) and the cover plate jig (30) are opposed to each other or is deviated to the outside of the region where the base plate jig (20) and the cover plate jig (30) are opposed to each other, respectively.

4. The impeller welding device according to claim 4, characterized in that: the heating plate (40) is connected with a support (43), two ends of the lower part of the support (43) are provided with semicircular, V-shaped or U-shaped claws (431) with downward openings, and the claws (431) are respectively clamped on guide rails (11) which are horizontally arranged in parallel.

5. The impeller welding device according to claim 4, characterized in that: the heating plate (40) is connected with a support (43), one end of the lower part of the support (43) is provided with a semicircular, V-shaped or U-shaped claw (431) with a downward opening, the claws (431) are respectively clamped on a guide rail (11) which is horizontally arranged in parallel and has a circular cross section, and the other end of the claw is provided with a connecting hole which is in cross-penetrating rotary fit with the guide rail (11).

6. The impeller welding device according to claim 4, characterized in that: the bottom plate clamp (20) comprises a positioning shaft (21), the positioning shaft (21) is connected with a connecting hole in the bottom plate (1) through a key (212), a threaded hole (211) is formed in the shaft end of the positioning shaft (21), a bolt (213) is connected to the threaded hole (211), and the head of the bolt (213) is pressed against the step surface of the connecting hole in the bottom plate (1).

7. The impeller welding device according to claim 4, characterized in that: the middle part of the cover plate clamp (30) is provided with a pipe body (31), the protruding extension section of the pipe body (31) is provided with an external thread (311), and the external thread (311) is connected with a threaded hole (3a) in the middle part of the cover plate (3).

8. The impeller welding device according to claim 4, characterized in that: two guide rails (11) which are horizontally arranged in parallel are arranged between supports at two ends of the rack (10), and two guide sleeves (22, 32) which are in cross-insertion type movable fit with the two guide rails (11) are respectively arranged at the lower parts of the bottom plate clamp (20) and the cover plate clamp (30).

9. The impeller welding apparatus according to claim 8, wherein: the two guide rails (11) are arranged at the same height, the lower side surface of one guide rail (11) is provided with a rack (111), the lower part of the cover plate clamp (30) is provided with a hand wheel (32), and the inner end of a wheel shaft (321) connected with the hand wheel (32) is provided with a gear which is meshed with the rack (111) to form a movement driving mechanism.