Machining die for mounting holes in double-flange end cover of generator

Abstract

The utility model discloses a machining die for a mounting hole in a double-flange end cover of a generator. The machining die comprises an upper die plate assembly and a lower die plate assembly. The upper die plate assembly comprises an upper die plate, a set of driving end flange machining hole drill bushings, a set of matching end flange machining hole drill bushings and two guide bushings, and the driving end flange machining hole drill bushings, the matching end flange machining hole drill bushings and the two guide bushings are installed on the upper die plate. And the group of driving end flange processing hole drill bushings are the positions of to-be-processed holes in the driving end flanges of the double-flange end cover. The lower die plate assembly comprises a lower die plate, two inner positioning pins, two outer positioning pins and two guide columns, wherein the two inner positioning pins, the two outer positioning pins and the two guide columns are installed on the lower die plate. According to the utility model, the two inner positioning pins lean against one side surface of the shaft supporting plate in the double-flange end cover for pre-positioning; the upper parts of the two guide columns are inserted into two guide sleeves in the upper template assembly, so that accurate positioning of the upper template and the lower template is realized; and the two outer positioning pins are inserted into the two mounting holes of the processed matching end flange to ensure that the positions of the mounting holes are not deviated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a machining die of mounting hole on generator double flange end cover. BACKGROUND

[0002] The double flange end cover is used on single bearing generator, is installed at the front end of the generator, that is, the fan end, is the connecting piece between the motor stator and rotor, connects the stator and rotor part of the motor, forms a complete rotating electrical system. It fixes and supports the internal structure of the generator, protects the inside of the generator, on one hand, guarantees the gap and relative position of the stator and rotor through the base mounting end (cooperating end flange A, see Figure 1a ) of the double flange end cover 1, on the other hand, guarantees the mounting hole position and concentricity requirement of the generator and the interfacing diesel engine through the interfacing diesel engine end (driving end flange B, see Figure 1b ). Therefore, the stop opening of the cooperating end flange A and the stop opening of the driving end flange B of the double flange end cover 1 guarantee the concentricity requirement of the generator and the diesel engine, and the mounting hole 1A of the cooperating end flange A and the mounting hole 1B of the driving end flange B guarantee the interfacing installation precision of the generator and the diesel engine, ensure the reliable operation and long-term stability of the motor. Therefore, the relative position of the mounting hole is very important. In order to make the machining error of the mounting hole within the shape and position tolerance range required in the design drawing, the following two kinds of machining processes can be selected for the mounting hole:

[0003] 1) Numerical control machining center: this machining mode can accurately process the position of the mounting hole, has the advantages of less die changing time and is suitable for large-scale production, but the machining cost is higher.

[0004] 2) Drilling by drilling machine: a first drilling jig plate 2 (see Figure 2a ) and a second drilling jig plate 3 (see Figure 2b ) are used for the cooperating end flange A and the driving end flange B. When machining, first place the cooperating end flange A downward on the drilling machine platform, place the first drilling jig plate 2 (see Figure 2a ) on the driving end flange B of the double flange end cover 1, put the stop opening of the first drilling jig plate 2 on the stop opening of the B end flange to guarantee the concentricity of the stop opening, when drilling, a positioning pin 4 inserted on the first drilling jig plate 2 is placed on one side surface of the fan ring-shaped shaft support plate 1C in the double flange end cover 1 as pre-positioning, the mounting hole on the driving end flange B is drilled and processed through the driving end flange processing hole drill sleeve 5 on the first drilling jig plate 2, after the processing of all the mounting holes on the driving end flange B is completed, turn over the double flange end cover 1, place the driving end flange B downward on the drilling machine platform, place the second drilling jig plate 3 (see Figure 2bAfter the stopper on the second drilling template 3 is matched and installed with the stopper on the matched end flange A, the mark groove on the outer diameter surface of the second drilling template 3 is aligned with the mark groove on the outer diameter surface of the matched end flange A as a predetermined position, a positioning pin 8 is respectively inserted into two positioning holes on the second drilling template 3, and the other end of the two positioning pins 8 is respectively inserted into the two installation holes on the driving end flange B as the accurate positioning of the second drilling template 3, and then the installation hole on the matched end flange A is drilled through the matched end flange processing hole drill sleeve 6, 7.

[0005] The drilling jig has the advantages that:

[0006] 1. The traditional drilling machine is used for processing, so that the jig cost is reduced.

[0007] 2. The drilling jig has simple structure, low manufacturing cost and convenient die changing.

[0008] The positioning is not accurate, and the drilling position error can reach more than 1mm. The utility model discloses a kind of machining moulds of installation hole on generator double-flange end cover, which is characterized by comprising upper die plate assembly and lower die plate assembly.

[0009] The utility model discloses a kind of machining moulds of installation hole on generator double-flange end cover, which is characterized by comprising upper die plate assembly and lower die plate assembly.

[0010] The utility model discloses a kind of machining moulds of installation hole on generator double-flange end cover, which is characterized by comprising upper die plate assembly and lower die plate assembly.

[0011] The upper die plate assembly includes upper die plate, a group of driving end flange processing hole drill sleeve, a group of matched end flange processing hole drill sleeve and two guide sleeves.

[0012] The upper die plate is a disc with a diameter matching the outer diameter of the mating end flange of the double-flanged end cover, and the bottom surface of the upper die plate is provided with a circle of upper mating end male stops matching the female stops of the mating end flange of the double-flanged end cover and a circle of upper driving end male stops matching the female stops of the driving end flange of the double-flanged end cover; an upper mark groove is formed on the outer end surface of the upper die plate; two guide column through holes, a circle of driving end flange machining holes and a circle of mating end flange machining holes are formed on the surface of the upper die plate; the two guide column through holes are formed in the middle of the upper die plate and are symmetrical to the upper mark groove; the circle of driving end flange machining holes are formed in the periphery of the two guide column through holes; and the circle of mating end flange machining holes are formed in the periphery of the circle of driving end flange machining holes.

[0013] A set of driving end flange machining hole drill sleeves are installed in the circle of driving end flange machining holes one by one in a corresponding manner;

[0014] A set of mating end flange machining hole drill sleeves are installed in the circle of mating end flange machining holes one by one in a corresponding manner;

[0015] Two guide sleeves are installed in the two guide column through holes one by one in a corresponding manner;

[0016] The lower die plate assembly includes a lower die plate, two inner positioning pins, two outer positioning pins and two guide columns; wherein,

[0017] The lower die plate is a disc with a diameter greater than the outer diameter of the mating end flange of the double-flanged end cover, and the top surface of the lower die plate is provided with a circle of lower mating end male stops matching the female stops of the mating end flange of the double-flanged end cover and a circle of lower driving end male stops matching the female stops of the driving end flange of the double-flanged end cover; a lower mark groove is formed on the outer end surface of the lower die plate; two guide column mounting holes, two inner positioning pin mounting holes and two outer positioning pin mounting holes are formed on the surface of the lower die plate; the two guide column mounting holes are coaxial with the two guide column through holes on the upper die plate; the two inner positioning pin mounting holes are located on a radial line of the lower die plate and correspond to one side of the shaft support plate in the double-flanged end cover; and the circle on which the two outer positioning pin mounting holes are located has the same diameter as the circle on which the circle of mating end flange machining holes on the upper die plate is located and is symmetrical to the lower mark groove;

[0018] Two inner positioning pins are installed in the two inner positioning pin mounting holes one by one in a corresponding manner;

[0019] Two outer positioning pins are installed in the two outer positioning pin mounting holes one by one in a corresponding manner;

[0020] Two guide columns are installed in the two guide column mounting holes on the lower die plate one by one in an upward direction, and the upper parts of the two guide columns are correspondingly and tightly fitted into the two guide sleeves in the upper die plate assembly.

[0021] The machining die for mounting holes on the double-flange end cover of the generator, wherein the bottom of the guide column is provided with a limiting ring.

[0022] The machining die for mounting holes on the double-flange end cover of the generator, wherein the surface of the upper die plate and the surface of the lower die plate are respectively provided with a center hole and four window holes located at the periphery of the center hole.

[0023] The machining die for mounting holes on the double-flange end cover of the generator has the following characteristics:

[0024] 1. The structure is light and convenient to change the die, thereby reducing the positioning and mounting time and improving the production efficiency.

[0025] 2. The shaft support plate in the end cover is used as a predetermined surface to enable the upper and lower die plates to be positioned with high precision, and the position error can be controlled within 0.4 mm, which can meet the requirement of 0.8 mm in the drawing, thereby reducing the error caused by changing the die and improving the processing quality.

[0026] 3. One set of die can process multiple types of end covers, thereby reducing the die changing time and lowering the die manufacturing cost.

[0027] 4. The positioning structure uses the guide column and guide sleeve mode in the standard die, thereby reducing the wear of the die plate and prolonging the service life of the die. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1a is a perspective view of one end of the double-flange end cover;

[0029] Figure 1b is a perspective view of the other end of the double-flange end cover;

[0030] Figure 2a is a perspective view of one state of the prior art machining die in use;

[0031] Figure 2b is another perspective view of the prior art machining die in use;

[0032] Figure 3 is an exploded view of the machining die for mounting holes on the double-flange end cover of the generator according to the present application;

[0033] Figure 3a is a perspective view of the upper die plate assembly in the machining die according to the present application;

[0034] Figure 3b is a perspective view of the lower die plate assembly in the machining die according to the present application;

[0035] Figure 4 is a first state view of the machining die according to the present application in use;

[0036] Figure 5 is the second state diagram of the machining die in use of the utility model;

[0037] Figure 6 is the third state diagram of the machining die in use of the utility model;

[0038] Figure 7 is the fourth state diagram of the machining die in use of the utility model. DETAILED DESCRIPTION

[0039] The utility model will be further described below with reference to the drawings.

[0040] Please refer to Figure 3 , Figure 3a and Figure 3b , the machining die of the generator double-flange end cover upper installation hole, including upper die plate assembly and lower die plate assembly.

[0041] Upper die plate assembly includes upper die plate 9, a group of driving end flange processing hole drill bushings 5, a group of cooperation end flange processing hole drill bushings 6 and two guide bushings 14;Among them,

[0042] Upper die plate 9 is the disc with the outer diameter of cooperation end flange A of double-flange end cover 1 adapts, the bottom surface of this upper die plate 9 is equipped with a circle with the cooperation end flange A of double-flange end cover 1 adapts upper cooperation end female stop 9A and a circle with the driving end flange B of double-flange end cover 1 adapts upper driving end male stop 9B;The outer end face of this upper die plate 9 is provided with an upper mark groove 9C;The surface of this upper die plate 9 is provided with a center hole, four window holes located in the periphery of the center hole, two guide column through holes, a circle of driving end flange processing holes and a circle of cooperation end flange processing holes;Two guide column through holes are provided in the middle part of upper die plate 9 and are symmetrical to upper mark groove 9C;A circle of driving end flange processing holes is provided in the periphery of two guide column through holes;A circle of cooperation end flange processing holes is provided in the periphery of a circle of driving end flange processing holes;The window hole on the upper die plate 9 can not only reduce the weight of the upper die plate 9, but also serve as an observation port;

[0043] A group of driving end flange processing hole drill bushings 5 are installed in a circle of driving end flange processing holes one by one;

[0044] A group of cooperation end flange processing hole drill bushings 6, 7 are installed in a circle of cooperation end flange processing holes one by one;

[0045] Driving end flange processing hole drill bushings 5 and cooperation end flange processing hole drill bushings 6 are all made of die steel material with high wear resistance and high hardness, and are installed in transition with the upper die plate, which saves material cost, reduces wear caused by multiple drilling and increases the service life of the die.

[0046] Two guide bushings 14 are installed in two guide column through holes one by one.

[0047] The lower die plate assembly comprises a lower die plate 10, two inner positioning pins 12 and two outer positioning pins 13, wherein,

[0048] The lower die plate 10 is a disc with a diameter larger than the outer diameter of the mating end flange A of the double-flange end cover 1, and a circle of lower mating end male stop 10A adapted to the female stop of the mating end flange A of the double-flange end cover 1 and a circle of lower driving end male stop 10B adapted to the female stop of the driving end flange B of the double-flange end cover 1 are arranged on the top surface of the lower die plate 10; a lower mark groove 10C is arranged on the outer end surface of the lower die plate 10; a center hole, four window holes located on the periphery of the center hole, two guide post mounting holes, two inner positioning pin mounting holes and two outer positioning pin mounting holes are arranged on the surface of the lower die plate 10; the two guide post mounting holes are coaxial with the two guide post through holes on the upper die plate 9; the two inner positioning pin mounting holes are located on a radial line of the lower die plate 10 and correspond to one side surface of the shaft support plate 1C in the double-flange end cover 1; the circle on which the two outer positioning pin mounting holes are located has the same diameter as the circle on which a circle of mating end flange machining holes on the upper die plate 9 are located and is symmetric to the lower mark groove 10C; the window holes on the upper die plate 10 can reduce the weight of the lower die plate 10;

[0049] The two inner positioning pins 12 are installed in the two inner positioning pin mounting holes one by one in correspondence;

[0050] The two outer positioning pins 13 are installed in the two outer positioning pin mounting holes one by one in correspondence, and the circle on which the two outer positioning pins 13 are located has the same diameter as the circle on which a circle of mating end flange machining holes on the upper die plate 9 are located;

[0051] The bottom of each of the two guide posts 11 is provided with a limiting ring; the two guide posts 11 are installed in the two guide post mounting holes on the lower die plate 10 one by one in correspondence, and the upper part of each of the two guide posts 11 is installed in the two guide sleeves 14 of the upper die plate assembly one by one in correspondence and tight fit.

[0052] Please refer to Figures 4 to 7 The machining die for the mounting hole of the generator double-flange end cover in use comprises the following steps:

[0053] I. Machining the mounting hole 1A of the mating end flange A of the double-flange end cover 1: first, fix the lower die plate stop positioning assembly on the workbench of the drilling machine, then install the mating end flange A of the double-flange end cover 1 upwards, install the female stop of the driving end flange B of the double-flange end cover 1 with the lower driving end male stop 10B on the lower die plate 10, and make one side surface of the shaft support plate 1C in the double-flange end cover 1 lean against the two inner positioning pins 12, so that the mark groove on the double-flange end cover 1 is aligned with the lower mark groove 10C on the lower die plate 10 (see Figure 4) ; the upper driving end male stopper 9B on the upper mold plate 9 is fitted and installed with the female stopper on the driving end flange B of the double-flange end cover 1, and the two guide sleeves 14 in the upper mold plate assembly are tightly fitted on the upper portions of the two guide columns 11 one by one, so as to fix and accurately position the position of the upper mold plate assembly (see Figure 5 Finally, the drill bit of the drilling machine is used to process the multiple mounting holes 1A on the fitting end flange A through the fitting end flange processing hole drill sleeve 6, 7.

[0054] II. Processing the mounting holes 1B of the driving end flange of the double-flange end cover 1: the double-flange end cover 1 is first turned over, so that the driving end flange B faces upward, the mark groove 1D on the double-flange end cover 1 is aligned with the lower mark groove 10C, the female stopper on the fitting end flange A which has been processed is fitted and installed with the lower fitting end male stopper 10A on the lower mold plate 10, and the two outer positioning pins 13 are fitted in the two mounting holes on the fitting end flange A one by one, so as to be pre-positioned (see Figure 6 ) ; the upper driving end male stopper 9B on the upper mold plate 9 is fitted and installed with the female stopper on the driving end flange B of the double-flange end cover 1, and the two guide sleeves 14 in the upper mold plate assembly are tightly fitted on the upper portions of the two guide columns 11 one by one, so as to fix and accurately position the position of the upper mold plate assembly (see Figure 7 Finally, the drill bit of the drilling machine is used to process the multiple mounting holes 1B on the driving end flange B through the driving end flange processing hole drill sleeve 5.

[0055] The above embodiments are only used for illustrating the utility model, and are not used for limiting the utility model. Those skilled in the art can make various transformations or modifications without departing from the spirit and scope of the utility model, so all equivalent technical solutions should belong to the scope of the utility model, and should be limited by the claims.

Claims

1. A machining die for mounting holes on a double-flange end cover of a generator, comprising an upper die plate assembly and a lower die plate assembly; characterized in that, the upper die plate assembly comprises an upper die plate, a set of driving end flange machining hole drill sleeves, a set of mating end flange machining hole drill sleeves, and two guide sleeves; wherein, the upper die plate is a disc with a diameter matching the outer diameter of the mating end flange of the double-flange end cover, the bottom surface of the upper die plate is provided with a ring of upper mating end male stops matching the female stops of the mating end flange of the double-flange end cover and a ring of upper driving end male stops matching the female stops of the driving end flange of the double-flange end cover; an upper mark groove is formed on the outer end surface of the upper die plate; two guide column through holes, a ring of driving end flange machining holes, and a ring of mating end flange machining holes are formed on the surface of the upper die plate; the two guide column through holes are formed in the middle of the upper die plate and are symmetrical to the upper mark groove; the ring of driving end flange machining holes is formed on the periphery of the two guide column through holes; and the ring of mating end flange machining holes is formed on the periphery of the ring of driving end flange machining holes; the set of driving end flange machining hole drill sleeves are installed one-to-one in the ring of driving end flange machining holes; the set of mating end flange machining hole drill sleeves are installed one-to-one in the ring of mating end flange machining holes; the two guide sleeves are installed one-to-one in the two guide column through holes; the lower die plate assembly comprises a lower die plate, two inner positioning pins, two outer positioning pins, and two guide columns; wherein, the lower die plate is a disc with a diameter larger than the outer diameter of the mating end flange of the double-flange end cover, the top surface of the lower die plate is provided with a ring of lower mating end male stops matching the female stops of the mating end flange of the double-flange end cover and a ring of lower driving end male stops matching the female stops of the driving end flange of the double-flange end cover; a lower mark groove is formed on the outer end surface of the lower die plate; two guide column mounting holes, two inner positioning pin mounting holes, and two outer positioning pin mounting holes are formed on the surface of the lower die plate; the two guide column mounting holes are coaxial with the two guide column through holes on the upper die plate; the two inner positioning pin mounting holes are located on a radial line of the lower die plate and correspond to one side of the shaft support plate inside the double-flange end cover; the circle on which the two outer positioning pin mounting holes are located has the same diameter as the circle on which the ring of mating end flange machining holes on the upper die plate is located and is symmetrical to the lower mark groove; the two inner positioning pins are installed one-to-one in the two inner positioning pin mounting holes; the two outer positioning pins are installed one-to-one in the two outer positioning pin mounting holes; the two guide columns are installed one-to-one in the two guide column mounting holes on the lower die plate in an upward direction, and the upper parts of the two guide columns are installed one-to-one and tightly fitted into the two guide sleeves in the upper die plate assembly; 2. The machining die for mounting holes on the double flange end cover of a generator according to claim 1, characterized in that, the bottom part of the guide column is provided with a limiting ring.

3. The machining die for mounting holes on the double flange end cover of a generator according to claim 1, characterized in that, a center hole and four window holes located on the periphery of the center hole are formed on the surface of the upper die plate and the surface of the lower die plate, respectively.

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