Pump shell machining method

Abstract

The invention discloses a pump shell machining method. The pump shell machining method comprises the following steps that a pump cover is machined; processing the front surface of the pump body; the pump cover and the pump body are machined cooperatively; processing the reverse side of the pump body; and processing four sides of the pump shell. According to the pump shell machining method provided by the invention, the pump cover and the pump body are respectively clamped and cooperatively mounted and clamped, so that the planer type milling machine can respectively machine all parts on the pump cover, the pump body and the pump shell.

Description

Technical Field

[0001] The invention relates to the technical field of pump casing processing, and in particular to a pump casing processing method. Background Art

[0002] The pump casing processing of the split-center pump mainly involves turning, milling and drilling operations on the split-center surface, bearing body and shaft cover, inlet and outlet flange planes and other parts of the pump casing. The existing pump casing processing method usually uses a specific machine tool to process a single part of the pump casing, and then moves to another machine tool to process another part of the pump casing, which is inconvenient.

[0003] Gantry milling machine is a commonly used CNC machining machine tool that can complete operations such as boring, milling and drilling. Therefore, a pump casing processing method is proposed, in which the pump casing is installed on the workbench of the gantry milling machine. The gantry milling machine can be used to complete the turning, milling and drilling operations of the center open surface, bearing body and shaft cover, inlet and outlet flange planes and other parts of the pump casing. Summary of the invention

[0004] The object of the present invention is to provide a method for processing a pump casing, which uses a gantry milling machine to complete the milling and drilling operations of the center open surface, bearing body and shaft cover, inlet and outlet flange planes and other parts of the pump casing. The specific technical scheme is:

[0005] A method for processing a pump casing, wherein a bearing body is provided on the pump casing, the pump casing comprises a pump cover and a pump body, a middle open surface is formed at the connection between the pump cover and the pump body, and an inlet and outlet flanges are provided on the pump body, the method comprising the following steps:

[0006] Step 1, pump cover processing: clamp the pump cover once, position the pump cover, mill the center surface of the pump cover, process the flange screw holes of the center surface of the pump cover, and disassemble the pump cover once;

[0007] Step 2, front processing of the pump body: clamp the pump body once, position the pump body, mill the center open face of the pump body, mill the positioning groove of the sealing body, process the drain hole, mill the positioning stop of the pump body, and process the screw hole of the flange on the center open face of the pump body;

[0008] Step 3, pump cover and pump body matching processing: pump cover and pump body are matched and installed once, positioning pin holes are processed, screw holes in the middle of the pump cover are face-faced, top surface of the pump cover is milled, top hole of the pump cover is processed, and the pump cover is disassembled twice;

[0009] Step 4: Processing the reverse side of the pump body: disassembling the pump body once, turning the pump body over once, clamping the pump body twice, milling the foot plate, processing the foot plate holes, disassembling the pump body twice, and turning the pump body over twice;

[0010] Step 5: Processing of the four sides of the pump casing: After the pump cover and pump body are installed for the second time, the string holes and the bearing body and shaft seal plane are bored, the inlet and outlet flange planes are milled, the inlet and outlet flange holes are processed, and the bearing body and shaft seal installation holes are processed.

[0011] Preferably,

[0012] The one-time clamping of the pump cover specifically includes: abutting against four points at the bottom of the open-face flange in the pump cover by the support assembly to provide support; abutting against two points at the top of the shaft seal position of the pump cover by the shaft seal position pressure plate to provide a first downward force;

[0013] The one-time clamping of the pump body specifically includes: abutting against four points at the bottom of the open-face flange in the pump body through the support component to provide support; abutting against two points at the top of the shaft seal position of the pump body through the shaft seal position pressure plate to provide a second downward force.

[0014] Preferably,

[0015] The pump cover positioning specifically includes: axial four-point positioning within the open plane of the pump cover; radial depth two-point positioning of the pump cover;

[0016] The pump body positioning specifically includes: axial four-point positioning within the open surface plane range of the pump body; and radial depth two-point positioning of the pump body.

[0017] Preferably,

[0018] The milling of the middle opening of the pump cover specifically includes: roughly milling the middle opening of the pump cover according to the shape of the flow channel; adjusting the shaft seal position pressure plate to provide a third downward force on the top of the shaft seal position of the pump cover, wherein the third downward force is less than the first downward force; and fine milling the middle opening of the pump cover according to the shape of the flow channel;

[0019] The milling of the middle open surface of the pump body specifically includes: rough milling the middle open surface of the pump body according to the shape of the flow channel; adjusting the shaft seal pressure plate to provide a fourth downward pressure on the top of the pump body shaft seal, wherein the fourth downward pressure is less than the second downward pressure; and fine milling the middle open surface of the pump body according to the shape of the flow channel.

[0020] Preferably,

[0021] The processing of the screw hole of the open face flange in the pump cover specifically comprises: expanding the screw hole of the open face flange in the pump cover according to a procedure;

[0022] The processing of the drain hole specifically includes: drilling the drain hole; tapping the drain hole;

[0023] The milling of the pump body turning over positioning stop specifically includes: machining the radial positioning stop of the pump body after turning over on the inner side of the bearing bodies at both ends according to the process size requirements;

[0024] The processing of the screw hole of the open face flange in the pump body specifically includes: drilling the bottom hole of the screw hole of the open face flange in the pump body according to the procedure; tapping the bottom hole of the screw hole of the open face flange in the pump body;

[0025] The processing of the positioning pin hole specifically includes: drilling the positioning pin hole; reaming the positioning pin hole;

[0026] The processing of the top hole of the pump cover specifically includes: drilling the top hole of the pump cover; tapping the top hole of the pump cover;

[0027] The processing of the foot plate holes specifically includes: expanding the foot plate holes, wherein the number of the foot plate holes is at least two;

[0028] The pump cover and pump body are put into position after secondary matching and installation, which specifically includes: the pump cover and pump body are formed into a pump shell after secondary matching and installation; the pump shell is put into position by boring and milling with the foot plate hole as a reference, and the foot nut is tightened.

[0029] Preferably, the primary and secondary matching installation of the pump cover and pump body specifically includes:

[0030] Turn the pump cover over so that the opening in the middle of the pump cover faces downward;

[0031] Combine the pump cover with the center open surface of the pump body, and check and adjust the alignment of the pump cover and the flow channel of the pump body;

[0032] Install the center split screws to connect the pump body and pump cover according to process requirements.

[0033] Preferably, the secondary disassembly of the pump cover specifically includes: removing the middle open face screws to remove the pump cover from the pump body.

[0034] Preferably,

[0035] When the pump cover is clamped once, the middle opening of the pump cover faces upwards;

[0036] When the pump body is clamped once, the middle opening of the pump body faces upwards;

[0037] When the pump body is clamped for the second time, the middle opening of the pump body faces downward.

[0038] Preferably, the boring of the holes and the bearing body and the shaft seal plane, milling of the inlet and outlet flange planes, and processing of the inlet and outlet flange holes specifically include the following steps:

[0039] Rough boring of holes, milling of inlet flange plane, and expansion of inlet flange holes;

[0040] The pump casing is turned over horizontally;

[0041] Rough boring of bearing body and shaft seal plane, milling of outlet flange plane, and expansion of outlet flange hole;

[0042] Precision boring of thread holes, bearing bodies and shaft seal surfaces.

[0043] Preferably, the processing of the bearing body and the shaft seal mounting hole specifically includes:

[0044] Drilling and tapping of the bearing body mounting holes;

[0045] Drill and tap the shaft seal mounting holes.

[0046] The pump casing processing method provided by the present invention solves the technical problems in the background technology by clamping the pump cover and the pump body separately and coordinating the installation and clamping so that the gantry milling machine can separately process the pump cover, the pump body and various parts on the pump casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 This is a schematic diagram of the operation of step S1 in an embodiment of the present invention;

[0049] Figure 2 for Figure 1 A partial enlarged view of part B;

[0050] Figure 3 for Figure 1 A partial enlarged view of part C in the middle;

[0051] Figure 4 It is a schematic top view of the operation of step S1 in an embodiment of the present invention;

[0052] Figure 5 for Figure 4 A partial enlarged view of part A;

[0053] Figure 6 This is a schematic diagram of the operation of step S2 in an embodiment of the present invention;

[0054] Figure 7 for Figure 6 A partial enlarged view of part D in the middle;

[0055] Figure 8 This is a schematic diagram of the operation of step S3 in an embodiment of the present invention;

[0056] Fig. 9 for Figure 8 A partial enlarged view of part E in the middle;

[0057] Fig.10 for Figure 8 A partial enlarged view of part F in the middle;

[0058] Fig.11 This is a schematic diagram of the operation of step S4 in an embodiment of the present invention;

[0059] Fig.12 for Fig.11 A partial enlarged view of the middle G part;

[0060] Fig.13 for Fig.11 A partial enlarged view of the middle H section;

[0061] Fig.14 It is a schematic diagram of the operation of the pump cover and pump body being put into place after secondary fitting and installation in step S5 of the embodiment of the present invention;

[0062] Fig.15 for Fig.14 A partial enlarged view of part I;

[0063] Fig.16 This is a schematic diagram of the operation of step S5 in an embodiment of the present invention;

[0064] Fig.17 for Fig.16 A partial enlarged view of the middle J part;

[0065] Fig.18 for Fig.16 A partial enlarged view of part K in the middle.

[0066] Reference numerals

[0067] 100-support assembly; 200-shaft sealing plate; 300-boring and milling position; 400-positioning point; 500-rotating table;

[0068] 10- pump housing;

[0069] 1- pump cover; 11- pump cover middle open face; 111- pump cover middle open face flange; 112- pump cover middle open face flange screw hole; 113- pump cover middle open face screw hole; 12- pump cover shaft seal position; 13- pump cover top surface; 131- pump cover top hole;

[0070] 2- pump body; 21- pump body middle open face; 211- pump body middle open face flange; 212- pump body middle open face flange screw hole; 22- pump body shaft seal position; 23- seal body positioning groove; 24- drain hole; 25- pump body flip positioning stop; 26- foot plate; 261- foot plate hole; 27- inlet flange plane; 271- inlet flange hole; 28- outlet flange plane; 281- outlet flange hole;

[0071] 3-Positioning pin hole;

[0072] 4- string holes;

[0073] 5-bearing body and shaft seal plane; 51-bearing body and shaft seal mounting hole;

[0074] 6- Anchor nut;

[0075] 7-Middle open face screw;

[0076] 8-Side holes. DETAILED DESCRIPTION

[0077] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0078] It should be noted that similar reference numerals denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

[0079] See also Figures 1 to 18 This embodiment provides a method for processing a pump casing. A bearing body is provided on the pump casing 10. The pump casing 10 includes a pump cover 1 and a pump body 2. A central open surface is formed at the connection between the pump cover 1 and the pump body 2. The pump body 2 is provided with an inlet and outlet flange. The method includes the following steps:

[0080] Step 1: Pump cover 1 processing: please refer to Figures 1 to 5 The steps include: clamping the pump cover 1 once, positioning the pump cover 1, milling the middle open surface 11 of the pump cover, processing the flange screw holes 112 of the middle open surface of the pump cover, and disassembling the pump cover 1 once.

[0081] Step 2: Pump body 2 front processing: see Figure 6 and Figure 7 This step includes: clamping the pump body 2 once, positioning the pump body 2, milling the middle open surface 21 of the pump body, milling the sealing body positioning groove 23, processing the drain hole 24, milling the pump body flip-over positioning stop 25, and processing the flange screw hole 212 of the middle open surface of the pump body.

[0082] Step 3: Pump cover 1 and pump body 2 matching processing: please refer to Figures 8 to 10 This step includes: the pump cover 1 and the pump body 2 are assembled once, the positioning pin hole 3 is processed, the screw hole 113 in the pump cover is flattened, the top surface 13 of the pump cover is milled, the top hole 131 of the pump cover is processed, and the pump cover 1 is disassembled twice.

[0083] Step 4: Processing the reverse side of the pump body 2: Please refer to Figures 11 to 13 The steps include: disassembling the pump body 2 once, turning over the pump body 2 once, clamping the pump body 2 twice, milling the foot plate 26, processing the foot plate hole 261, disassembling the pump body 2 twice, and turning over the pump body 2 twice.

[0084] Step 5: Processing of four sides of the pump housing 10: see Figures 14 to 18 This step includes: the pump cover 1 and the pump body 2 are placed in place after secondary matching and installation, the string hole 4 and the bearing body and shaft seal plane 5 are bored, the inlet and outlet flange planes are milled, the inlet and outlet flange holes are processed, and the bearing body and shaft seal installation hole 51 are processed.

[0085] Among them, the clamping and positioning operations of the pump cover 1 and the pump body 2 in the above steps can be completed on the workbench of the gantry milling machine, and the processing of the center open surface and screw holes of the pump cover 1 and the pump body 2 can be performed by the gantry milling machine and the boring machine.

[0086] In step 1, after the pump cover 1 is in place, it is pressed tightly on the anchor, and then the anchor is fixed on the workbench; after the pump cover 1 is positioned, the cross line of the flow channel of the pump cover 1 is determined. Figure 3 The open face flange screw hole 112 in the pump cover is used for the matching installation and fixation of the pump cover 1 and the pump body 2.

[0087] In step 2, after the pump body 2 is in place, it is pressed tightly on the position, and then the position is fixed on the workbench; after the pump body 2 is positioned, the cross line of the flow channel of the pump body 2 is determined; since the inner wall of the bearing body of the pump body 2 is concave, the step of processing the drain hole 24 can be adjusted to step 4. Figure 7 The sealing body positioning groove 23 is the sealing positioning groove inside the bearing body of the pump body 2, the pump body flip positioning stop 25 is the positioning groove on the shaft cover of the bearing body of the pump body 2, and the open face flange screw hole 212 in the pump body is used for the matching installation and fixation of the pump cover 1 and the pump body 2.

[0088] In step 3, after the pump cover 1 and the pump body 2 are assembled together, the pump cover 1 and the pump body 2 are assembled into a complete pump housing 10 structure. Fig. 9 The locating pin hole 3 passes through the center open face flange of the pump cover 1 and the pump body 2, and the locating pin hole 3 is used to install the locating pin. The countersunk position of the center open face screw hole 113 of the pump cover is the side of the center open face flange 111 of the pump cover away from the installation surface of the pump cover 1 and the pump body 2.

[0089] In step 5, after the pump cover 1 and the pump body 2 are assembled for the second time, they are placed and fixed on the rotary table 500. The rotary table 500 is rotated to horizontally flip the pump housing 10 so as to process the parts on all four sides of the pump housing 10. Fig.17 The string hole 4 is the side wall of the flow channel in the pump housing 10.

[0090] The pump casing processing method provided in this embodiment solves the technical problems in the background technology by clamping the pump cover 1 and the pump body 2 separately and coordinating the installation and clamping, so that the gantry milling machine can process the pump cover 1, the pump body 2 and various parts on the pump casing 10 respectively.

[0091] Furthermore, in step 1, the one-time clamping of the pump cover 1 specifically includes: abutting against four points on the bottom of the open-face flange 111 in the pump cover through the support assembly 100 to provide support; abutting against two points on the top of the pump cover shaft seal position 12 through the shaft seal position pressure plate 200 to provide a first downward force.

[0092] In step 2, the first clamping of the pump body 2 specifically includes: the support assembly 100 abuts against four points at the bottom of the open face flange 211 of the pump body to provide support, and the shaft seal position pressure plate 200 abuts against two points at the top of the pump body shaft seal position 22 to provide a second downward force.

[0093] See also Figure 1 The support assembly 100 is four adjustable columns on the installation position, and the four adjustable columns respectively abut against the four positions at the bottom of the open-face flange 111 in the pump cover or the open-face flange 211 in the pump body. After adjusting the position of the rear support point, the shaft seal pressure plate 200 abuts against the top of the pump cover shaft seal position 12 or the pump body shaft seal position 22 to press the pump cover 1 or the pump body 2.

[0094] Furthermore, in the examples provided in this embodiment:

[0095] The positioning of the pump cover 1 specifically includes: axial four-point positioning within the plane range of the open surface 11 in the pump cover and radial two-point positioning of the pump cover 1.

[0096] The positioning of the pump body 2 specifically includes: axial four-point positioning within the plane range of the open surface 21 in the pump body and radial two-point positioning of the pump body 2.

[0097] See also Figure 5 The pump cover 1 and the pump body 2 are positioned in the same manner. Within the plane range of the pump cover middle open surface 11 or the pump body middle open surface 21, four positioning points 400 are set along the axial direction of the pump cover 1 or the pump body 2 and in the same direction. The pump cover 1 or the pump body 2 can be positioned axially by abutting the four positioning points 400 with a positioning rod or other structures; two longitudinal positioning points are set along the radial direction of the pump cover 1 or the pump body 2, that is, in the depth direction. The pump cover 1 or the pump body 2 can be positioned radially by extending the positioning rod into the two longitudinal positioning points and touching the inner wall. After positioning, the flow channel cross line of the pump cover 1 or the pump body 2 can be determined.

[0098] Furthermore, in the examples provided in this embodiment:

[0099] Milling the open surface 11 in the pump cover specifically includes the following sub-steps:

[0100] Roughly mill the middle opening 11 of the pump cover according to the shape of the flow channel.

[0101] The shaft seal pressure plate 200 is adjusted to provide a third downward force on the top of the pump cover shaft seal 12, wherein the third downward force is less than the first downward force; that is, the pump cover shaft seal pressure plate 200 is loosened to prevent deformation.

[0102] The middle opening surface 11 of the pump cover is milled precisely according to the shape of the flow channel.

[0103] Milling the open surface 21 of the pump body specifically includes the following sub-steps:

[0104] Roughly mill the middle opening 21 of the pump body according to the shape of the flow channel.

[0105] The shaft seal pressure plate 200 is adjusted to provide a fourth downward pressure on the top of the pump body shaft seal 22, wherein the fourth downward pressure is less than the second downward pressure; that is, the pump cover shaft seal pressure plate 200 is loosened to prevent deformation.

[0106] The open surface 21 in the pump body is milled precisely according to the shape of the flow channel.

[0107] Furthermore, in the examples provided in this embodiment:

[0108] Processing the open face flange screw hole 112 in the pump cover specifically includes: expanding the open face flange screw hole 112 in the pump cover according to a procedure.

[0109] Processing the drain hole 24 specifically includes: drilling the drain hole 24; and tapping the drain hole 24.

[0110] The method of milling the pump body turning-over positioning stop 25 specifically includes: machining the radial positioning stop of the rear shaft of the pump body turning-over on the inner sides of the bearing bodies at both ends according to the process size requirements.

[0111] Processing the open face flange screw hole 212 in the pump body specifically includes: drilling the bottom hole of the open face flange screw hole 212 in the pump body according to a procedure; and tapping the bottom hole of the open face flange screw hole 212 in the pump body.

[0112] Processing the positioning pin hole 3 specifically includes: drilling the positioning pin hole 3; and reaming the positioning pin hole 3.

[0113] Processing the pump cover top hole 131 specifically includes: drilling the pump cover top hole 131; and tapping the pump cover top hole 131.

[0114] Processing the foot plate holes 261 specifically includes: expanding the foot plate holes 261 , wherein the number of the foot plate holes 261 is at least two.

[0115] The pump cover 1 and the pump body 2 are placed in position after secondary fitting and installation, which specifically includes: the pump cover 1 and the pump body 2 are installed in a secondary fitting and installation to form a pump casing 10; taking the foot plate hole 261 as a reference, the pump casing 10 is placed in the boring and milling position 300, and the anchor nut 6 is tightened to fix the pump casing 10 on the boring and milling position 300, and then the boring and milling position 300 is installed on the rotating worktable 500.

[0116] For further information, see Fig. 9 The primary and secondary matching installation of the pump cover 1 and the pump body 2 specifically includes the following sub-steps:

[0117] The pump cover 1 is turned over so that the open surface 11 in the pump cover faces downward.

[0118] Combine the pump cover 1 with the open surface 21 of the pump body, and check and adjust the flow channel calibration of the pump cover 1 and the pump body 2.

[0119] Install the center open face screw 7 and combine it with the pump body 2 and pump cover 1 according to the process requirements.

[0120] The number of the center open face screws 7 assembled by the secondary matching installation of the pump cover 1 and the pump body 2 can be greater than that assembled by the primary matching installation.

[0121] Furthermore, the secondary disassembly of the pump cover 1 specifically includes: removing the middle face screws 7 and removing the pump cover 1 from the pump body 2 .

[0122] The first disassembly of the pump cover 1 includes: loosening the pressure plate and removing the pump cover 1 from the workbench.

[0123] Furthermore, in the examples provided in this embodiment:

[0124] When the pump cover 1 is clamped once, the middle opening surface 11 of the pump cover faces upward so as to process the middle opening surface 11 of the pump cover.

[0125] When the pump body 2 is clamped for the first time, the middle opening surface 21 of the pump body faces upwards so as to process the middle opening surface 21 of the pump body.

[0126] After the pump body 2 is disassembled once, it is turned over once so that the open surface 21 in the pump body faces downward. When the pump body 2 is clamped for the second time, the reverse side of the pump body 2 can be processed.

[0127] For further information, see Fig.17 and Fig.18 , boring the string hole 4 and the bearing body and the shaft seal plane 5, milling the inlet and outlet flange planes, and processing the inlet and outlet flange holes specifically include the following steps:

[0128] Roughly bore the string hole 4, mill the inlet flange plane 27, and expand the inlet flange hole 271.

[0129] The pump housing 10 is turned over horizontally and rotated 180°.

[0130] Rough boring of the bearing body and the shaft seal plane 5, milling of the outlet flange plane 28, and expansion of the outlet flange hole 281.

[0131] Precision boring of the thread hole 4, the bearing body and the shaft seal plane 5.

[0132] Furthermore, processing the bearing body and the shaft seal mounting hole 51 specifically includes:

[0133] Drill and tap the bearing body mounting holes.

[0134] Drill and tap the shaft seal mounting holes.

[0135] In step 5, drilling and tapping of the side holes 8 may also be included.

[0136] Working principle:

[0137] The pump casing processing method provided in this embodiment is specifically performed according to the following steps:

[0138] Put the pump cover 1 in place and press it tightly: Assemble the pump cover 1 with the mounting bracket, adjust the position of the supporting points, pad the No. 4 supporting point, and press it tightly.

[0139] Positioning of pump cover 1: The machining center positions 4 axial points of pump cover 1 and 2 radial points of pump cover 1 to determine the cross line of the flow channel of pump cover 1.

[0140] Rough milling of the middle opening of the pump cover 11: Rough milling according to the shape of the flow channel.

[0141] Loosen pressure plate: loosen the shaft seal pressure plate 200 to prevent deformation.

[0142] Fine milling of the middle opening of the pump cover 11: Fine milling according to the shape of the flow channel.

[0143] Hole expansion: expand the screw hole 112 of the open face flange in the pump cover according to the procedure.

[0144] Pump body 2 is put into place and pressed tightly: Assemble the pump body and the installation position, adjust the position of the support point, pad the No. 4 support point, and press tightly.

[0145] Positioning of pump body 2: The machining center positions 4 axial points of pump body 2 and 2 radial points of pump body 2 to determine the cross line of flow channel of pump body 2.

[0146] Rough milling of the open surface 21 in the pump body: Rough milling according to the shape of the flow channel.

[0147] Loosen pressure plate: loosen the shaft seal pressure plate 200 to prevent deformation.

[0148] Fine milling of the open surface 21 in the pump body: fine milling according to the shape of the flow channel.

[0149] Milling of the mouth ring and the sealing body positioning groove 23: milling of each positioning groove.

[0150] Drill drain holes and tap threads.

[0151] Machining flip-over positioning reference: according to the process dimensions, the radial positioning stop of the shaft after the pump body is flipped is machined on the inside of the bearing bodies at both ends.

[0152] Drilling: Drill the bottom hole 212 of the open face flange screw hole in the pump body according to the procedure.

[0153] Drill 2 other upward holes in the pump body.

[0154] The open face screw holes in the pump body are tapped.

[0155] Other holes are tapped.

[0156] The pump cover 1 is turned over so that the open surface 11 in the pump cover faces downward.

[0157] Pump body cover matching: Combine the pump cover 1 with the open surface 21 of the pump body, and check and adjust the flow channel calibration of the pump cover 1 and the pump body 2.

[0158] Combine with pump body cover: Install the center open face screws 7 and combine with pump body 2 and pump cover 1 according to process requirements.

[0159] Drill and tap the positioning pin hole 3: Drill the positioning pin hole 3 and tap the hole.

[0160] The screw hole 113 in the open surface of the pump cover is face-faced.

[0161] Mill the top surface 13 of the pump cover.

[0162] Drill all holes in the top surface of the pump cover.

[0163] The top hole of the pump cover is tapped.

[0164] Disassemble the pump cover 1: Remove the center open face screws 7 and remove the pump cover 1 from the pump body 2.

[0165] Turn over the pump body 2: loosen the pressure plate, turn over the pump body 2, and make the open surface 21 of the pump body face downward.

[0166] Install the pump body 2 in place and tighten the pressure plate: Position the pump body 2 with the axial radial stop and install it on the back of the pump body 2, and tighten the pressure plate.

[0167] Milling foot plate 26: Milling the bottom surface of foot plate 26.

[0168] Expanded foot plate holes 261: Expanded foot plate holes 261, two of which are used as positioning holes for subsequent processing.

[0169] Disassemble pump body 2: Loosen the pressure plate and move pump body 2 down from the workbench.

[0170] Turn over: turn over the pump body 2 so that the open surface 21 in the pump body faces upward.

[0171] The workpiece is placed in place and tightened: taking the foot plate hole 26 as a reference, place the pump housing 2 into the boring and milling position 300 and tighten the anchor nut 6.

[0172] Boring and milling of string holes 4, inlet flange: rough boring of string holes 4, milling of inlet flange plane 27, expansion of flange holes.

[0173] Changing face: The rotary table 500 rotates 180 degrees to process the outlet flange.

[0174] Rough boring of the bearing body and shaft seal plane 5, milling of the outlet flange plane 28, and expansion of the flange hole.

[0175] Precision boring of the thread hole 4, the bearing body and the shaft seal plane 5.

[0176] Drill and tap the mounting holes of the bearing body.

[0177] Drill and tap the shaft seal mounting hole.

[0178] Other side holes are drilled and tapped.

[0179] The principles and implementation methods of the present invention are described herein using specific examples, and the description of the above embodiments is only used to help understand the method and core ideas of the present invention. The above are only preferred implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention, which should be within the protection scope of the present invention.

Claims

1. A method for processing a pump casing, wherein a bearing body is provided on the pump casing (10), the pump casing (10) comprises a pump cover (1) and a pump body (2), a middle open surface is formed at the connection between the pump cover (1) and the pump body (2), and an inlet and outlet flanges are provided on the pump body (2), characterized in that: The method comprises the following steps: S1. Processing of the pump cover (1): clamping the pump cover (1) once, positioning the pump cover (1), milling the center open surface (11) of the pump cover, processing the flange screw holes (112) of the center open surface of the pump cover, and disassembling the pump cover (1) once; S2, front processing of the pump body (2): clamping the pump body (2) once, positioning the pump body (2), milling the middle open face (21) of the pump body, milling the positioning groove (23) of the sealing body, processing the drain hole (24), milling the positioning stop (25) of the pump body turn-over, and processing the screw hole (212) of the flange of the middle open face of the pump body; S3, pump cover (1) and pump body (2) matching processing: pump cover (1) and pump body (2) are matched and installed once, positioning pin hole (3) is processed, screw hole (113) in the open surface of pump cover is face-faced, top surface of pump cover (13) is milled, top hole (131) of pump cover is processed, and pump cover (1) is disassembled for the second time; S4, processing the reverse side of the pump body (2): disassembling the pump body (2) once, turning over the pump body (2) once, clamping the pump body (2) twice, milling the foot plate (26), processing the foot plate hole (261), disassembling the pump body (2) twice, turning over the pump body (2) twice; S5. Processing of the four sides of the pump casing (10): the pump cover (1) and the pump body (2) are put into place after secondary fitting and installation, the string holes (4) and the bearing body and shaft seal plane (5) are bored, the inlet and outlet flange planes are milled, the inlet and outlet flange holes are processed, and the bearing body and shaft seal installation holes (51) are processed.

2. The method according to claim 1, characterized in that: The one-time clamping of the pump cover (1) specifically comprises: abutting against four points on the bottom of the open face flange (111) in the pump cover through the support assembly (100) to provide support; abutting against two points on the top of the shaft seal position (12) of the pump cover through the shaft seal position pressure plate (200) to provide a first downward force; The one-time clamping of the pump body (2) specifically includes: abutting against four points on the bottom of the open-face flange (211) in the pump body through the support assembly (100) to provide support; and abutting against two points on the top of the pump body shaft seal position (22) through the shaft seal position pressure plate (200) to provide a second downward force.

3. The method according to claim 1, characterized in that: The positioning of the pump cover (1) specifically includes: axial four-point positioning within the plane range of the open surface (11) in the pump cover; radial two-point positioning of the pump cover (1); The positioning of the pump body (2) specifically includes: axial four-point positioning within the plane range of the open surface (21) in the pump body; and radial two-point positioning of the pump body (2).

4. The method according to claim 2, characterized in that: The milling of the middle open surface (11) of the pump cover specifically comprises: roughly milling the middle open surface (11) of the pump cover according to the shape of the flow channel; adjusting the shaft seal position pressure plate (200) to provide a third downward force on the top of the shaft seal position (12) of the pump cover, wherein the third downward force is less than the first downward force; and fine milling the middle open surface (11) of the pump cover according to the shape of the flow channel; The milling of the pump body center open surface (21) specifically includes: roughly milling the pump body center open surface (21) according to the shape of the flow channel; adjusting the shaft seal position pressure plate (200) to provide a fourth downward pressure on the top of the pump body shaft seal position (22), wherein the fourth downward pressure is less than the second downward pressure; and fine milling the pump body center open surface (21) according to the shape of the flow channel.

5. The method according to claim 1, characterized in that: The processing of the open face flange screw hole (112) in the pump cover specifically comprises: expanding the open face flange screw hole (112) in the pump cover according to a procedure; The processing of the drain hole (24) specifically includes: drilling the drain hole (24); tapping the drain hole (24); The milling of the pump body turning over positioning stop (25) specifically comprises: machining the radial positioning stop of the pump body turning over rear axle on the inner side of the bearing bodies at both ends according to the process size requirements; The processing of the open face flange screw hole (212) in the pump body specifically comprises: drilling the bottom hole of the open face flange screw hole (212) in the pump body according to a procedure; tapping the bottom hole of the open face flange screw hole (212) in the pump body; The processing of the positioning pin hole (3) specifically comprises: drilling the positioning pin hole (3); reaming the positioning pin hole (3); The processing of the pump cover top hole (131) specifically comprises: drilling the pump cover top hole (131); tapping the pump cover top hole (131); The processing of the foot plate holes (261) specifically includes: expanding the foot plate holes (261), wherein the number of the foot plate holes (261) is at least two; The pump cover (1) and the pump body (2) are assembled and placed in position after secondary matching, which specifically includes: the pump cover (1) and the pump body (2) are assembled and placed in position after secondary matching to form a pump casing (10); taking the foot plate hole (261) as a reference, placing the pump casing (10) into a boring and milling position (300), and tightening the foot nut (6).

6. The method according to claim 1, characterized in that The primary and secondary matching installation of the pump cover (1) and the pump body (2) specifically includes: Turn the pump cover (1) over so that the open surface (11) in the pump cover faces downward; Combine the pump cover (1) with the middle open surface (21) of the pump body, and check and adjust the flow channel alignment between the pump cover (1) and the pump body (2); The center face screws (7) are installed according to the process requirements to combine the pump body (2) and the pump cover (1).

7. The method according to claim 6, characterized in that The secondary disassembly of the pump cover (1) specifically comprises: removing the middle open face screws (7) and removing the pump cover (1) from the pump body (2).

8. The method according to claim 1, characterized in that: When the pump cover (1) is clamped once, the open surface (11) in the pump cover faces upwards; When the pump body (2) is clamped once, the open surface (21) of the pump body faces upward; When the pump body (2) is clamped for the second time, the open surface (21) of the pump body faces downward.

9. The method according to claim 1, characterized in that: The boring of the string holes (4) and the bearing body and the shaft seal plane (5), milling of the inlet and outlet flange planes, and processing of the inlet and outlet flange holes specifically include the following steps: Rough boring of the string hole (4), milling of the inlet flange plane (27), and expansion of the inlet flange hole (271); The pump casing (10) is turned over horizontally; Rough boring of the bearing body and the shaft seal plane (5), milling of the outlet flange plane (28), and expansion of the outlet flange hole (281); Precision boring of the threading hole (4), the bearing body and the shaft sealing surface (5).

10. The method according to claim 9, characterized in that The processing of the bearing body and the shaft seal mounting hole (51) specifically includes: Drilling and tapping of the bearing body mounting holes; Drill and tap the shaft seal mounting holes.

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