PFA impeller welding equipment

Abstract

The utility model relates to the technical field of hot melting welding, and discloses a PFA impeller welding device which comprises a rack, a first base body clamping tool, a second base body clamping tool, a bottom plate clamping tool, a cover plate clamping tool and a hot plate assembly, and the first base body clamping tool is used for clamping and driving a base body to rotate and axially translate; the second base body clamping tool is used for clamping and driving the base body to rotate and axially translate; the bottom plate clamping tool is used for clamping a bottom plate to be welded and driving the bottom plate to be close to or away from the second end of the base body. The cover plate clamping tool is used for clamping a cover plate to be welded and driving the cover plate to be close to or away from the first end of the base body. The hot plate assembly is used for heating the bottom plate and the second end of the base body and heating the cover plate and the first end of the base body at the same time, and the hot plate assembly can go in and out of the space between the base body and the bottom plate and go in and out of the space between the base body and the cover plate. According to the PFA impeller welding equipment, the cleanliness requirement of the welding environment is met, and the welding precision is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot melting welding technical field especially relates to a PFA impeller welding equipment. BACKGROUND

[0002] PFA impeller is made of high purity PFA base plate, base body and upper cover plate through high temperature hot melting technology welding. Magnetic suspension pump is a special centrifugal pump, and its working principle is based on magnetic suspension technology and magnetic transmission technology, wherein the impeller is the core component of the magnetic suspension pump, so that the high temperature hot melting welding technology used for welding is particularly important.

[0003] The conventional hot melting welding equipment on the market at present all realize hot melting welding in a contact heating mode, but PFA impeller is currently considered as the best choice for transporting super-clean, sensitive and high-purity fluid in the fields of biopharmaceuticals and semiconductors, and the cleanliness of the weld joint is very high, so that the welding operation must be carried out in a dust-free workshop, and in order to ensure the precision and sealing property of the impeller, high-precision welding control must be possessed. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a PFA impeller welding equipment to solve the problems in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A PFA impeller welding equipment is used for welding the base body of the impeller with the base plate and the cover plate respectively, and the PFA impeller welding equipment comprises a rack and a first base body clamping tool, a second base body clamping tool, a base plate clamping tool, a cover plate clamping tool and a hot plate assembly arranged on the rack, wherein:

[0007] The first base body clamping tool is used for clamping the first end of the base body to be welded and driving the base body to rotate and axially translate;

[0008] The second base body clamping tool is used for clamping the second end of the base body to be welded and driving the base body to rotate and axially translate;

[0009] The base plate clamping tool is coaxially arranged with the first base body clamping tool, and the base plate clamping tool is used for clamping the base plate to be welded and driving the base plate to rotate and approach or move away from the second end of the base body;

[0010] The cover plate clamping tool is coaxially arranged with the second base body clamping tool, and the cover plate clamping tool is used for clamping the cover plate to be welded and driving the cover plate to rotate and approach or move away from the first end of the base body;

[0011] The heat plate assembly is arranged between the bottom plate clamping tool and the first base body clamping tool and between the cover plate clamping tool and the second base body clamping tool, and is used for simultaneously heating the second end of the base body and the bottom plate and simultaneously heating the first end of the base body and the cover plate, and the heat plate assembly can enter and exit between the base body and the bottom plate and between the base body and the cover plate.

[0012] As an optional solution, the base body is in an axial horizontal state after being clamped by the first base body clamping tool and the second base body clamping tool, the first base body clamping tool, the second base body clamping tool, the bottom plate clamping tool and the cover plate clamping tool are located on the same axis, and the heat plate assembly translates along a direction perpendicular to the axis.

[0013] As an optional solution, the first base body clamping tool and the second base body clamping tool are arranged on the rack in opposite directions and form two welding stations on the rack, and the rack is provided with a cover in which the first base body clamping tool, the second base body clamping tool, the bottom plate clamping tool, the cover plate clamping tool and the heat plate assembly are covered, and the cover is provided with a feeding and discharging window corresponding to the two welding stations.

[0014] As an optional solution, the feeding and discharging window is provided with a lifting window, and the lifting window is provided with a viewing glass.

[0015] As an optional solution, the first base body clamping tool and the second base body clamping tool each include a first moving seat, a first clamping piece and a first driving piece, wherein:

[0016] The rack is provided with a first guide rail extending to the bottom plate clamping tool and a second guide rail extending to the cover plate clamping tool, and the two first moving seats are arranged on the first guide rail and the second guide rail;

[0017] The first clamping piece is rotatably mounted on the first moving seat, and the first clamping piece is used for fixing or releasing the base body;

[0018] The first driving piece is used for driving the first moving seat to move along the first guide rail or the second guide rail, so that the base body can approach or move away from the heat plate assembly.

[0019] As an optional solution, the bottom plate clamping tool includes a second moving seat, a second clamping piece and a second driving piece, wherein:

[0020] The rack is provided with a third guide rail extending to the first base body clamping tool, and the second moving seat is arranged on the third guide rail;

[0021] The second clamping piece is rotatably mounted on the second moving seat, and the second clamping piece is used for fixing or releasing the bottom plate;

[0022] The second driving piece is used for driving the second moving seat to move along the third guide rail, so that the bottom plate can approach or move away from the heat plate assembly and the second end of the base body.

[0023] As an alternative, the clamping tool for the cover plate comprises a third moving seat, a third clamping piece and a third driving piece, wherein:

[0024] The fourth guide rail extending to the second base body clamping tool is arranged on the rack, and the third moving seat is arranged on the fourth guide rail;

[0025] The third clamping piece is rotatably mounted on the third moving seat, and the third clamping piece is used for fixing or releasing the cover plate;

[0026] The third driving piece is used for driving the third moving seat to move along the fourth guide rail, so that the cover plate can be close to or away from the hot plate assembly and the first end of the base body.

[0027] As an alternative, the hot plate assembly comprises a fourth moving seat and a fourth driving piece, wherein:

[0028] Two heating plates are arranged on the fourth moving seat, one heating plate performs non-contact far infrared heat radiation on the first end or the second end of the base body, and the other heating plate performs non-contact far infrared heat radiation on the bottom plate or the cover plate;

[0029] The fourth driving piece is used for driving the fourth moving seat to move, so that the hot plate assembly can move out of the base body and the bottom plate or the base body and the cover plate after heating is completed.

[0030] The beneficial effects of the utility model are as follows:

[0031] The PFA impeller welding equipment has high automation degree, high control and operation precision and stable structure, meets the cleanliness requirement of the welding environment, ensures welding precision, and in cooperation with the movable hot plate assembly, can be quickly moved away after heating is completed, does not affect the welding and fixing of the base body and the bottom plate and the cover plate, meets the welding forming requirement, and the double welding stations can perform welding operation on the two ends of the base body respectively, and the efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structure schematic view of the PFA impeller welding equipment provided by the utility model embodiment.

[0033] In the drawings:

[0034] 1, rack; 11, cover; 12, feeding and discharging window; 13, lifting window; 14, visual glass;

[0035] 2, first base body clamping tool; 21, first moving seat; 22, first clamping piece;

[0036] 3, second base body clamping tool;

[0037] 4, bottom plate clamping tool; 41, second moving seat; 42, second clamping piece;

[0038] 5. Cover plate clamping fixture; 51. Third movable seat; 52. Third clamping piece;

[0039] 6. Hot plate assembly; 61. Heating plate. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0041] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0044] In addition, the terms "first", "second", etc. are only used to distinguish in description and have no special meaning.

[0045] See also Figure 1As shown, the embodiment provides a PFA impeller welding device for welding the base body of the impeller with the bottom plate and the cover plate respectively, which comprises a rack 1, a first base body clamping tool 2, a second base body clamping tool 3, a bottom plate clamping tool 4, a cover plate clamping tool 5 and a hot plate assembly 6 arranged on the rack 1, wherein:

[0046] The first base body clamping tool 2 is used to clamp the first end of the base body to be welded and drive the base body to rotate and axially translate;

[0047] The second base body clamping tool 3 is used to clamp the second end of the base body to be welded and drive the base body to rotate and axially translate;

[0048] The bottom plate clamping tool 4 is coaxially arranged with the first base body clamping tool 2, and is used to clamp the bottom plate to be welded and drive the bottom plate to rotate and approach or move away from the second end of the base body;

[0049] The cover plate clamping tool 5 is coaxially arranged with the second base body clamping tool 3, and is used to clamp the cover plate to be welded and drive the cover plate to rotate and approach or move away from the first end of the base body;

[0050] The hot plate assembly 6 is arranged between the bottom plate clamping tool 4 and the first base body clamping tool 2 and between the cover plate clamping tool 5 and the second base body clamping tool 3, and is used to simultaneously heat the bottom plate and the second end of the base body and simultaneously heat the cover plate and the first end of the base body, and the hot plate assembly 6 can enter and exit between the base body and the bottom plate and between the base body and the cover plate.

[0051] Therefore, the PFA impeller welding device has high automation degree, high control and operation precision and stable structure, meets the cleanliness requirement of the welding environment, guarantees the welding precision, and can quickly move away after heating by cooperating with the movable hot plate assembly 6, does not affect the welding and fixing of the base body with the bottom plate and the cover plate, meets the welding forming requirement, and has double welding stations to perform welding operation on the two ends of the base body, and is more efficient.

[0052] From the perspective of optimizing the structure layout, the base body is in an axial horizontal state after being clamped by the first base body clamping tool 2 and the second base body clamping tool 3, the first base body clamping tool 2, the second base body clamping tool 3, the bottom plate clamping tool 4 and the cover plate clamping tool 5 are located on the same axis, and the hot plate assembly 6 translates along a direction perpendicular to the axis.

[0053] Therefore, the layout of the first base body clamping tool 2, the second base body clamping tool 3, the bottom plate clamping tool 4, the cover plate clamping tool 5 and the hot plate assembly 6 is reasonably designed, the whole device structure is compact, accurate movement of each component is guaranteed, and the welding precision is further improved.

[0054] Further, the first base clamping tool 2 and the second base clamping tool 3 are arranged on the rack 1 in opposite directions to form two welding stations on the rack 1, and the rack 1 is provided with a cover 11 in which the first base clamping tool 2, the second base clamping tool 3, the bottom plate clamping tool 4, the cover plate clamping tool 5 and the hot plate assembly 6 are covered, and the cover 11 is provided with a feeding and discharging window 12 corresponding to the two welding stations, which is convenient for manual material moving or automatic material moving.

[0055] In addition, the rack 1 can be used separately corresponding to the two welding stations, or one side can perform the welding operation of the bottom plate and the base, and the other side can perform the welding operation of the cover plate and the base, that is, the same device can satisfy a complete set of welding operations, and the two welding stations can work at the same time, which greatly improves the welding efficiency.

[0056] Optionally, the feeding and discharging window 12 is provided with a lifting window 13, and the lifting window 13 is provided with a viewing glass 14 to observe the internal welding condition in real time.

[0057] Specifically, the first base clamping tool 2 and the second base clamping tool 3 each include a first moving seat 21, a first clamping piece 22 and a first driving piece, the rack 1 is provided with a first guide rail extending to the bottom plate clamping tool 4 and a second guide rail extending to the cover plate clamping tool 5, and the two first moving seats 21 are arranged on the first guide rail and the second guide rail; the first clamping piece 22 is rotatably installed on the first moving seat 21, and the first clamping piece 22 is used for fixing or releasing the base; and the first driving piece is used for driving the first moving seat 21 to move along the first guide rail or the second guide rail, so that the base can approach or move away from the hot plate assembly 6.

[0058] Optionally, the first clamping piece 22 adopts an ultra-precision diaphragm chuck with a rotary function to realize rapid clamping and rotary driving of the base; the first driving piece adopts a servo screw rod feeding and cooperates with a high-precision grating ruler to measure displacement, so as to accurately control the distance between the end of the base and the hot plate assembly 6, ensure uniform heating of the welding opening, and meet the welding requirements.

[0059] Specifically, the bottom plate clamping tool 4 includes a second moving seat 41, a second clamping piece 42 and a second driving piece, the rack 1 is provided with a third guide rail extending to the first base clamping tool 2, and the second moving seat 41 is arranged on the third guide rail; the second clamping piece 42 is rotatably installed on the second moving seat 41, and the second clamping piece 42 is used for fixing or releasing the bottom plate; and the second driving piece is used for driving the second moving seat 41 to move along the third guide rail, so that the bottom plate can approach or move away from the hot plate assembly 6 and the second end of the base.

[0060] Optionally, the second clamping member 42 is also clamped by an ultra-precision diaphragm chuck with a rotary function to realize rapid clamping and rotary driving of the bottom plate; the second driving member adopts servo screw feeding and cooperates with high-precision grating ruler to measure displacement, so as to accurately control the distance between the bottom plate and the hot plate assembly 6, ensure uniform heating of the welding opening, meet the welding requirements, and also accurately control the fusion depth of the bottom plate and the base, meet the size requirements of the shell after welding.

[0061] Specifically, the cover plate clamping tool 5 includes a third moving seat 51, a third clamping member 52, and a third driving member, the rack 1 is provided with a fourth guide rail extending to the second base clamping tool 3, and the third moving seat 51 is arranged on the fourth guide rail; the third clamping member 52 is rotatably installed on the third moving seat 51, and the third clamping member 52 is used for fixing or releasing the cover plate; the third driving member is used for driving the third moving seat 51 to move along the fourth guide rail, so that the cover plate can approach or move away from the hot plate assembly 6 and the first end of the base.

[0062] Optionally, the third clamping member 52 is also clamped by an ultra-precision diaphragm chuck with a rotary function to realize rapid clamping and rotary driving of the cover plate; the third driving member adopts servo screw feeding and cooperates with high-precision grating ruler to measure displacement, so as to accurately control the distance between the cover plate and the hot plate assembly 6, ensure uniform heating of the welding opening, meet the welding requirements, and also accurately control the fusion depth of the cover plate and the base, meet the size requirements of the shell after welding.

[0063] Specifically, the hot plate assembly 6 includes a fourth moving seat and a fourth driving member, the fourth moving seat is provided with two heating plates 61, one heating plate 61 performs non-contact far-infrared thermal radiation on the first end or the second end of the base, and the other heating plate 61 performs non-contact far-infrared thermal radiation on the bottom plate or the cover plate; the fourth driving member is used for driving the fourth moving seat to move, so that the hot plate assembly 6 can move out of the base and the bottom plate or the base and the cover plate after heating is completed.

[0064] Optionally, the fourth driving member adopts a linear slide module, a motor screw nut pair, or other linear drivers to meet the driving requirements; the heating plate 61 adopts a non-contact far-infrared thermal radiation form to cooperate with the rotating base, bottom plate, and cover plate to ensure uniform heating of the welding opening without pollution, and the other two heating plates 61 can be independently controlled in temperature to meet different welding temperature requirements.

[0065] Therefore, the two independently movable hot plate assemblies 6 serve as heat sources and are controlled by the fourth driving member to quickly switch in and out to reduce heat dissipation, and the first driving member, the second driving member, and the third driving member are used to accurately control the distance between the base and the heating plate 61, the distance between the bottom plate and the heating plate 61, and the distance between the cover plate and the heating plate 61, so as to ensure that the base, the bottom plate, and the cover plate are accurately controllable in heating and meet the welding requirements.

[0066] In addition, based on the full-automatic control system, the operator only needs to select the welding process, clamps the base body, the bottom plate and the cover plate of the impeller, and then the full-automatic welding process can be realized without personnel intervention, and the welding efficiency is greatly improved.

[0067] The specific welding process is as follows:

[0068] 1) After the equipment is initialized, the base body, the bottom plate and the cover plate are respectively put into the two feeding and discharging windows 12, and are clamped and fixed by the corresponding first base body clamping tool 2, the second base body clamping tool 3, the bottom plate clamping tool 4 and the cover plate clamping tool 5;

[0069] 2) The start button is pressed, the bottom plate clamping tool 4 and the cover plate clamping tool 5 are respectively fed to the corresponding first base body clamping tool 2 and the second base body clamping tool 3, so that the bottom plate is pre-assembled with the second end of the base body, and the cover plate is pre-assembled with the first end of the base body, the coaxiality and the gap are checked, and the melting loss after welding is calculated;

[0070] 3) After the detection is completed, the equipment starts to judge whether the temperature of the heating plate 61 of the hot plate assembly 6 reaches the allowable welding temperature, and after the set temperature is reached, the fourth driving part drives the hot plate assembly 6 to insert between the base body and the bottom plate and between the base body and the cover plate;

[0071] 4) The first driving part, the second driving part and the third driving part correspondingly drive the base body, the bottom plate and the cover plate to approach the heating plate 61 to the appropriate position, and control the base body, the bottom plate and the cover plate to rotate relative to the heating plate 61 to realize uniform heating;

[0072] 5) After the heating reaches the preset time, the fourth driving part drives the hot plate assembly 6 to retreat, the second driving part and the third driving part correspondingly drive the bottom plate and the cover plate to fold with the base body respectively and stop rotating for welding;

[0073] 6) The cooling time starts, and after the time is up, the first base body clamping tool 2, the second base body clamping tool 3, the bottom plate clamping tool 4 and the cover plate clamping tool 5 are all opened, and the welded product is taken away.

[0074] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A PFA impeller welding apparatus for welding a base of an impeller to a bottom plate and a cover plate, respectively, characterized by, The PFA impeller welding device comprises a rack (1) and a first base body clamping tool (2), a second base body clamping tool (3), a bottom plate clamping tool (4), a cover plate clamping tool (5) and a hot plate assembly (6) arranged on the rack (1), wherein: The first base body clamping tool (2) is used for clamping the first end of the base body to be welded and driving the base body to rotate and axially translate; The second base body clamping tool (3) is used for clamping the second end of the base body to be welded and driving the base body to rotate and axially translate; The bottom plate clamping tool (4) is coaxially arranged with the first base body clamping tool (2), and the bottom plate clamping tool (4) is used for clamping the bottom plate to be welded and driving the bottom plate to rotate and approach or move away from the second end of the base body; The cover plate clamping tool (5) is coaxially arranged with the second base body clamping tool (3), and the cover plate clamping tool (5) is used for clamping the cover plate to be welded and driving the cover plate to rotate and approach or move away from the first end of the base body; The hot plate assembly (6) is arranged between the bottom plate clamping tool (4) and the first base body clamping tool (2) and between the cover plate clamping tool (5) and the second base body clamping tool (3), respectively, and the hot plate assembly (6) is used for simultaneously heating the bottom plate and the second end of the base body and simultaneously heating the cover plate and the first end of the base body, and the hot plate assembly (6) can enter and exit between the base body and the bottom plate and between the base body and the cover plate.

2. The PFA impeller welding apparatus according to claim 1, characterized by The base body is in an axial horizontal state after being clamped by the first base body clamping tool (2) and the second base body clamping tool (3), the first base body clamping tool (2), the second base body clamping tool (3), the bottom plate clamping tool (4) and the cover plate clamping tool (5) are located on the same axis, and the hot plate assembly (6) translates in a direction perpendicular to the axis.

3. The PFA impeller welding apparatus of claim 2, wherein, The first base body clamping tool (2) and the second base body clamping tool (3) are arranged opposite to each other on the rack (1) and form two welding stations on the rack (1), a cover (11) is arranged on the rack (1) to cover the first base body clamping tool (2), the second base body clamping tool (3), the bottom plate clamping tool (4), the cover plate clamping tool (5) and the hot plate assembly (6), and an upper and lower material loading window (12) is arranged on the cover (11) corresponding to the two welding stations.

4. The PFA impeller welding apparatus of claim 3, wherein, A lifting window (13) is arranged on the upper and lower material loading window (12), and a viewing glass (14) is arranged on the lifting window (13).

5. The PFA impeller welding apparatus of claim 1, wherein, The first base body clamping tool (2) and the second base body clamping tool (3) each comprise a first moving seat (21), a first clamping piece (22) and a first driving piece, wherein: First guide rails extending to the bottom plate clamping tool (4) and second guide rails extending to the cover plate clamping tool (5) are arranged on the rack (1), and two first moving seats (21) are arranged on the first guide rails and the second guide rails, respectively; The first clamping piece (22) is rotatably mounted on the first moving seat (21), and is used for fixing or releasing the base body; The first driving piece is used for driving the first moving seat (21) to move along the first guide rail or the second guide rail, so that the base body can be close to or away from the hot plate assembly (6).

6. The PFA impeller welding apparatus of claim 1, wherein, The bottom plate clamping tool (4) comprises a second moving seat (41), a second clamping piece (42) and a second driving piece, wherein: The rack (1) is provided with a third guide rail extending to the first base body clamping tool (2), and the second moving seat (41) is arranged on the third guide rail; The second clamping piece (42) is rotatably mounted on the second moving seat (41), and is used for fixing or releasing the bottom plate; The second driving piece is used for driving the second moving seat (41) to move along the third guide rail, so that the bottom plate can be close to or away from the hot plate assembly (6) and the second end of the base body.

7. The PFA impeller welding apparatus of claim 1, wherein The cover plate clamping tool (5) comprises a third moving seat (51), a third clamping piece (52) and a third driving piece, wherein: The rack (1) is provided with a fourth guide rail extending to the second base body clamping tool (3), and the third moving seat (51) is arranged on the fourth guide rail; The third clamping piece (52) is rotatably mounted on the third moving seat (51), and is used for fixing or releasing the cover plate; The third driving piece is used for driving the third moving seat (51) to move along the fourth guide rail, so that the cover plate can be close to or away from the hot plate assembly (6) and the first end of the base body.

8. The PFA impeller welding apparatus of claim 1, wherein, The hot plate assembly (6) comprises a fourth moving seat and a fourth driving piece, wherein: The fourth moving seat is provided with two heating plates (61), one of which performs non-contact far infrared heat radiation on the first end or the second end of the base body, and the other of which performs non-contact far infrared heat radiation on the bottom plate or the cover plate; The fourth driving piece is used for driving the fourth moving seat to move, so that the hot plate assembly (6) can move out of the base body and the bottom plate or the base body and the cover plate after heating is completed.

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