CN114178407B

CN114178407B - Shell sizing die

Info

Publication number: CN114178407B
Application number: CN202111381119.4A
Authority: CN
Inventors: 龚光辉; 左明; 肖承华; 徐希
Original assignee: Chongqing Huxi Electrical Industrial Co ltd
Current assignee: Chongqing Huxi Electrical Industrial Co ltd
Priority date: 2021-11-20
Filing date: 2021-11-20
Publication date: 2023-09-19
Anticipated expiration: 2041-11-20
Also published as: CN114178407A

Abstract

The invention provides a shell sizing die. The sizing die comprises a taper mandrel, a taper expanding tire, a sizing outer ring and a baffle. The sizing die is simple in structure, economical, applicable and accurate in positioning. The concentricity can be ensured by one-time shaping of the inner circle, the outer circle and the spigot of the shell during shaping, thereby not only fully realizing the design intention, but also ensuring the requirement that the concentricity cannot be ensured in the prior art. Reduces labor intensity and processing cost and improves the quality of products. In a word, this plastic mould simple structure has both improved product quality, has reduced manufacturing cost, has shortened product production cycle's advantage.

Description

Shell sizing die

Technical Field

The invention relates to the technical field of motors, in particular to a shell sizing die.

Background

The steel plate shell has the advantages of material saving, light weight and the like. However, the thickness of the wall is thin, so that the wall is easy to deform in the rolling and welding processes, and the requirement of the motor stator during assembly cannot be met. The plastic is needed to be shaped by the shell. However, the existing sizing die cannot guarantee the deformation of the outer circle and the spigot, and cannot guarantee the concentricity of the inner hole and the spigot. The subsequent assembly and the motor performance are easy to be adversely affected, and the bore can be swept when severe, so that the motor is blocked and burned.

Disclosure of Invention

The invention aims to provide a shell sizing die which solves the problems in the prior art.

The technical scheme adopted for realizing the purpose of the invention is that the shell shaping die comprises a taper mandrel, a taper expansion tire, a shaping outer ring and a baffle plate.

The taper mandrel is integrally a stepped rotary body. The taper mandrel comprises an end shaft, a first tyre mandrel, a connecting shaft and a second tyre mandrel which are coaxially arranged in sequence. The end shaft and the connecting shaft are of cylindrical structures. The first tire mandrel and the second tire mandrel are of round platform structures. The large end face of the first tire mandrel is connected with the end shaft, and the small end face is connected with the connecting shaft. The large end face of the second tire mandrel is connected with the connecting shaft, and a threaded hole for screwing in a screw is formed in the center of the small end face. The diameter of the small end face of the first tire core shaft is larger than that of the large end face of the second tire core shaft. The diameter of the connecting shaft is smaller than that of the large end face of the second tire mandrel.

The taper expansion tire is of a cylindrical structure as a whole. The taper expansion mould is provided with a stepped rotary inner cavity. The inner cavity of the taper expansion tire comprises a primary shaft cavity, a connecting cavity and a secondary shaft cavity which are coaxially arranged in sequence. The primary shaft cavity is matched with the first tire mandrel, and the secondary shaft cavity is matched with the second tire mandrel. An annular limiting outer curled edge is arranged on the outer wall of one end of the taper expansion tire, which is close to the primary shaft cavity. And a shell accommodating groove I is formed in the limiting outer curled edge. Three bisector expansion joints are axially arranged on the side wall of the taper expansion tire. The expansion joint divides the taper expansion tire into three identical expansion blocks.

The shaping outer ring is of a cylindrical structure as a whole. The shaping outer ring can be axially split into a top cover plate and a bearing plate. The top cover plate and the bearing plate are integrally arc-shaped plates. The top cover plate is arranged in a concave manner. And the top cover plate is provided with a pressing bearing platform. The bearing plate is concavely arranged. The bearing plate is arranged on the working platform.

The face of baffle is provided with casing holding groove II and supplies the hole that the screw passed.

Further, a pressing mechanism is arranged at the top of the top cover plate.

Further, the expansion block is made of tool steel.

The invention also discloses a machine shell shaping method adopting the machine shell shaping die, which comprises the following steps:

1) The taper expansion tire is arranged in the inner cavity of the shell. The baffle blocks an opening at one end of the shell. One end of the shell is embedded into the shell accommodating groove II, and the other end of the shell is embedded into the shell accommodating groove I. The taper mandrel is inserted into the inner cavity of the taper expansion tire. After the screw rod of the screw passes through the baffle plate, the screw rod is screwed into the threaded hole. The screw is in threaded fit with the threaded hole, and the position of the taper mandrel in the inner cavity of the taper bulge tire is adjusted by rotating the screw. The first tyre core shaft and the second tyre core shaft are pressed against the expansion blocks, so that the expansion blocks are separated from each other, and the expansion blocks are pressed against the inner wall of the shell. And when the screw cannot be fastened again, finishing the shaping of the inner hole of the shell.

2) And positioning the shell by taking the end shaft as a shaft core, and finishing turning of the spigot.

3) The shell is placed on the supporting plate, the pressing mechanism presses the top cover plate, and the shell is shaped until the top cover plate and the supporting plate completely wrap the shell. And the outer wall surface is completely pressed by the shaping outer ring in the rotating and moving process of the shell, so that comprehensive shaping is realized.

The technical effects of the invention are undoubted: the shaping die is simple in structure, economical, applicable and accurate in positioning. The concentricity can be ensured by one-time shaping of the inner circle, the outer circle and the spigot of the shell during shaping, thereby not only fully realizing the design intention, but also ensuring the requirement that the concentricity cannot be ensured in the prior art. Reduces labor intensity and processing cost and improves the quality of products. In a word, this plastic mould simple structure has both improved product quality, has reduced manufacturing cost, has shortened product production cycle's advantage.

Drawings

FIG. 1 is a schematic diagram of a shell shaping die;

FIG. 2 is a schematic diagram of the operation of a tapered mandrel;

FIG. 3 is a schematic view of a tapered mandrel structure;

FIG. 4 is a schematic view of a taper expansion tire;

FIG. 5 is a schematic diagram of an expansion block;

FIG. 6 is a schematic diagram of a shaped outer race;

fig. 7 is a schematic view of a baffle.

In the figure: taper mandrel 1, end shaft 101, first tire mandrel 102, connecting shaft 103, second tire mandrel 104, threaded hole 105, taper expansion tire 2, primary shaft cavity 201, connecting cavity 202, secondary shaft cavity 203, expansion joint 204, expansion block 205, limit outer curled edge 206, housing accommodating groove 207, shaping outer ring 3, top cover plate 301, supporting plate 302, baffle plate 4, housing accommodating groove II 401, screw 5, housing 6, working platform 7.

Detailed Description

The present invention is further described below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples. Various substitutions and alterations are made according to the ordinary skill and familiar means of the art without departing from the technical spirit of the invention, and all such substitutions and alterations are intended to be included in the scope of the invention.

Example 1:

referring to fig. 1, the embodiment provides a case sizing die, which comprises a taper mandrel 1, a taper expansion tire 2, a sizing outer ring 3 and a baffle 4.

Referring to fig. 3, the taper mandrel 1 is a stepped rotary body as a whole. The taper mandrel 1 comprises an end shaft 101, a first tire mandrel 102, a connecting shaft 103 and a second tire mandrel 104 which are coaxially arranged in sequence. The end shaft 101 and the connecting shaft 103 are of cylindrical structures. The first tire core shaft 102 and the second tire core shaft 104 have a truncated cone structure. The large end face of the first tire mandrel 102 is connected with the end shaft 101, and the small end face is connected with the connecting shaft 103. The large end face of the second tire core shaft 104 is connected with the connecting shaft 103, and a threaded hole 105 into which the screw 5 is screwed is formed in the center of the small end face. The diameter of the small end face of the first tire core shaft 102 is larger than that of the large end face of the second tire core shaft 104. The diameter of the connecting shaft 103 is smaller than that of the large end face of the second tire core shaft 104.

Referring to fig. 4 and 5, the tapered tyre 2 is a cylindrical structure as a whole. The taper expansion tire 2 is provided with a stepped rotary inner cavity. The inner cavity of the taper expansion tire 2 comprises a primary shaft cavity 201, a connecting cavity 202 and a secondary shaft cavity 203 which are coaxially arranged in sequence. The primary axial cavity 201 is matched with the first tire spindle 102, and the secondary axial cavity 203 is matched with the second tire spindle 104. An annular limiting outer curled edge 206 is arranged on the outer wall of one end of the taper expansion tire 2, which is close to the primary shaft cavity 201. The limit outer curled edge 206 is provided with a housing accommodating groove I207. Three bisector expansion joints 204 are axially arranged on the side wall of the taper expansion tire 2. The expansion joint 204 separates the tapered carcass 2 into three identical expansion blocks 205.

Referring to fig. 6, the shaping outer ring 3 has a cylindrical structure as a whole. The shaping outer ring 3 can be axially split into a top cover plate 301 and a bearing plate 302. The top cover plate 301 and the bearing plate 302 are integrally arc-shaped plates. The top cover plate 301 is arranged concave. The top cover plate 301 is provided with a pressing platform. The carrier plate 302 is concavely disposed. The carrier plate 302 is arranged on the work platform 7. The top of the top cover plate 301 is provided with a pressing mechanism.

Referring to fig. 7, a housing accommodating groove ii 401 and a hole through which the screw 5 passes are provided on the plate surface of the baffle 4.

The machine shell can be precisely positioned, the inner circle, the outer circle and the spigot can be shaped once, the concentricity is good, the operation is quick, convenient and labor-saving, and the higher processing precision and the production efficiency can be ensured.

Example 2:

the main structure of this embodiment is the same as that of embodiment 1, wherein the expansion block 205 is made of tool steel.

Example 3:

referring to fig. 2, this embodiment discloses a method for shaping a casing by using the casing shaping die of embodiment 1, which includes the following steps:

1) The taper expansion tire 2 is arranged in the inner cavity of the shell 6. The baffle 4 seals an opening of one end of the casing 6. One end of the housing 6 is inserted into the housing accommodating groove II 401, and the other end is inserted into the housing accommodating groove I207. The taper mandrel 1 is inserted into the inner cavity of the taper expansion tire 2. After passing through the baffle plate 4, the screw rod of the screw 5 is screwed into the threaded hole 105. The screw 5 is in threaded fit with the threaded hole 105, and the position of the taper mandrel 1 in the inner cavity of the taper bulge tire 2 is adjusted by rotating the screw 5. The first and second mandrels 102, 205 bear against the blocks 205, causing the blocks 205 to separate from each other, and the blocks 205 bear against the inner wall of the casing 6. When the screw 5 cannot be fastened again, the shaping of the inner hole of the shell 6 is completed.

2) And positioning the shell 6 by taking the end shaft 101 as a shaft core, and finishing turning of the spigot.

3) The cabinet 6 is placed on the support plate 302, the pressing mechanism presses the top cover plate 301 down, and the cabinet 6 is shaped until the top cover plate 301 and the support plate 302 completely wrap the cabinet 6. The outer wall surface is completely pressed by the shaping outer ring 3 in the process of rotating and moving the shell 6, so that comprehensive shaping is realized.

Claims

1. A casing sizing die, characterized in that: comprises a taper mandrel (1), a taper expansion tire (2), a shaping outer ring (3) and a baffle plate (4);

the whole taper mandrel (1) is a stepped revolving body; the taper mandrel (1) comprises an end shaft (101), a first tire mandrel (102), a connecting shaft (103) and a second tire mandrel (104) which are coaxially arranged in sequence; the end shaft (101) and the connecting shaft (103) are of cylindrical structures; the first tire mandrel (102) and the second tire mandrel (104) are of a round platform structure; the large end face of the first tire mandrel (102) is connected with the end shaft (101), and the small end face is connected with the connecting shaft (103); the large end face of the second tire mandrel (104) is connected with the connecting shaft (103), and a threaded hole (105) into which the screw (5) is screwed is formed in the center of the small end face; the diameter of the small end face of the first tire core shaft (102) is larger than that of the large end face of the second tire core shaft (104); the diameter of the connecting shaft (103) is smaller than that of the large end face of the second tire mandrel (104);

the whole taper expansion tire (2) is of a cylindrical structure; the taper expansion tire (2) is provided with a stepped rotary inner cavity; the inner cavity of the taper expansion tire (2) comprises a primary shaft cavity (201), a connecting cavity (202) and a secondary shaft cavity (203) which are coaxially arranged in sequence; the primary shaft cavity (201) is matched with the first tire mandrel (102), and the secondary shaft cavity (203) is matched with the second tire mandrel (104); an annular limiting outer curled edge (206) is arranged on the outer wall of one end, close to the primary shaft cavity (201), of the taper expansion tire (2); a shell accommodating groove I (207) is formed in the limiting outer curled edge (206); three bisector expansion joints (204) are axially formed in the side wall of the taper expansion tire (2); the expansion joint (204) divides the taper expansion tire (2) into three identical expansion blocks (205);

the whole shaping outer ring (3) is of a cylindrical structure; the shaping outer ring (3) can be axially split into a top cover plate (301) and a bearing plate (302); the top cover plate (301) and the bearing plate (302) are integrally arc-shaped plates; the top cover plate (301) is arranged in a concave manner; the top cover plate (301) is provided with a pressing bearing platform; the bearing plate (302) is concavely arranged; the bearing plate (302) is arranged on the working platform (7);

the board surface of the baffle plate (4) is provided with a shell accommodating groove II (401) and holes for screws (5) to pass through.

2. A cabinet shaping die as claimed in claim 1, wherein: the top of the top cover plate (301) is provided with a pressing mechanism.

3. A cabinet shaping die as claimed in claim 1, wherein: the expansion block (205) is made of tool steel.

4. A method of shaping a housing using the housing shaping die of claim 2, comprising the steps of:

1) The taper expansion tire (2) is arranged in the inner cavity of the shell (6); the baffle (4) seals an opening at one end of the shell (6); one end of the shell (6) is embedded into the shell accommodating groove II (401), and the other end is embedded into the shell accommodating groove I (207); the taper mandrel (1) is inserted into the inner cavity of the taper expansion tire (2); after the screw rod of the screw (5) passes through the baffle plate (4), the screw rod is screwed into the threaded hole (105); the screw (5) is in threaded fit with the threaded hole (105), and the position of the taper mandrel (1) in the inner cavity of the taper expansion tire (2) is adjusted by rotating the screw (5); the first tire core shaft (102) and the second tire core shaft are pressed against the expansion blocks (205) to separate the expansion blocks (205) from each other, and the expansion blocks (205) are pressed against the inner wall of the shell (6); when the screw (5) cannot be fastened again, the shaping of the inner hole of the shell (6) is completed;

2) Positioning the shell (6) by taking the end shaft (101) as a shaft core, and finishing turning of the spigot;

3) Placing the shell (6) on a supporting plate (302), pressing down the top cover plate (301) by a pressing mechanism, and shaping the shell (6) until the top cover plate (301) and the supporting plate (302) completely wrap the shell (6); and the outer wall surface is completely pressed by the shaping outer ring (3) in the rotating and moving process of the shell (6), so that comprehensive shaping is realized.