CN114178407A

CN114178407A - Machine shell sizing die

Info

Publication number: CN114178407A
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: 2022-03-15
Anticipated expiration: 2041-11-20
Also published as: CN114178407B

Abstract

The invention provides a machine shell sizing die. The sizing die comprises a taper mandrel, a taper expansion die, a sizing outer ring and a baffle. The sizing die is simple in structure, economical, applicable and accurate in positioning. During shaping, the concentricity of the inner circle, the outer circle and the spigot of the shell can be ensured through one-step shaping, so that the design intention is fully realized, and the requirement that the concentricity cannot be ensured in the prior art is also ensured. The labor intensity and the processing cost are reduced, and the product quality is improved. In a word, the shaping die has the advantages of simple structure, improved product quality, reduced production cost and shortened product production period.

Description

Machine 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 saving materials, light weight and the like. However, the wall thickness is thin, so that the motor stator is easy to deform in the rolling and welding processes, and the requirements of assembling the motor stator cannot be met. It is shaped by a casing. However, the existing sizing die can not guarantee the deformation of the outer circle and the spigot, and can not guarantee the concentricity of the inner hole and the spigot. The subsequent assembly and the motor performance are easily affected adversely, and the chamber can be swept seriously, so that the motor is burnt out due to the stalling of the motor.

Disclosure of Invention

The invention aims to provide a machine shell shaping die to solve the problems in the prior art.

The technical scheme adopted for achieving the purpose of the invention is that the shell sizing die comprises a taper mandrel, a taper expanding die, a sizing outer ring and a baffle.

The taper mandrel is integrally a stepped rotary body. The taper mandrel comprises an end shaft, a first tire mandrel, a connecting shaft and a second tire 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 circular truncated cone structures. The large end face of the first tire mandrel is connected with the end shaft, and the small end face of the first tire mandrel is connected with the connecting shaft. The big 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 mandrel is larger than that of the large end face of the second tire mandrel. The diameter of the connecting shaft is smaller than that of the large end face of the second tire mandrel.

The taper expanding tire is of a cylindrical structure as a whole. The taper expanding tire is provided with a step-shaped rotary inner cavity. The inner cavity of the taper expanding 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. And 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 equal-division-line expansion joints are axially arranged on the side wall of the taper expansion tire. The expansion joint divides the taper expansion tire into three same expansion blocks.

The shaping outer ring is integrally of a cylindrical structure. 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 mode. And a lower pressure bearing platform is arranged on the top cover plate. The bearing plate is arranged concavely. The support plate is arranged on the working platform.

And a shell accommodating groove II and a hole for a screw to pass through are formed in the surface of the baffle.

Furthermore, 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 expanding tire is arranged in the inner cavity of the shell. The baffle blocks one end of the shell to be open. 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 an inner cavity of the taper expanding tire. And a screw rod of the screw penetrates through the baffle plate and is screwed into the threaded hole. The screw is in threaded fit with the threaded hole, and the screw is rotated to adjust the position of the taper mandrel in the inner cavity of the taper expanding tire. The first tire mandrel and the second tire mandrel are pressed against the expansion blocks to separate the expansion blocks from each other, and then 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 (5) positioning the shell by taking the end shaft as a shaft core to complete the turning of the spigot.

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

The technical effects of the invention are undoubted: the shaping die is simple in structure, economical and applicable, and accurate in positioning. During shaping, the concentricity of the inner circle, the outer circle and the spigot of the shell can be ensured through one-step shaping, so that the design intention is fully realized, and the requirement that the concentricity cannot be ensured in the prior art is also ensured. The labor intensity and the processing cost are reduced, and the product quality is improved. In a word, the shaping die has the advantages of simple structure, improved product quality, reduced production cost and shortened product production period.

Drawings

FIG. 1 is a schematic view of a case sizing die;

FIG. 2 is a schematic view of the taper mandrel;

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

FIG. 4 is a schematic view of a tapered expanding tire structure;

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

FIG. 6 is a schematic view of a shaping outer ring;

fig. 7 is a schematic view of a baffle.

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

Detailed Description

The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.

Example 1:

referring to fig. 1, the present embodiment provides a casing sizing die, which includes a taper mandrel 1, a taper expanding die 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 mandrel shaft 102, a connecting shaft 103 and a second mandrel shaft 104 which are coaxially arranged in sequence. The end shaft 101 and the connecting shaft 103 are cylindrical structures. The first tire mandrel 102 and the second tire mandrel 104 are in a circular truncated cone structure. The big 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 big end face of the second tire mandrel 104 is connected with the connecting shaft 103, and a threaded hole 105 for screwing the screw 5 is formed in the center of the small end face. The diameter of the small end face of the first mandrel 102 is larger than the diameter of the large end face of the second mandrel 104. The diameter of the connecting shaft 103 is smaller than that of the large end face of the second mandrel 104.

Referring to fig. 4 and 5, the taper expander 2 has an overall cylindrical structure. The taper expanding tire 2 is provided with a step-shaped rotary inner cavity. The inner cavity of the taper expanding 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. The limiting outer curled edge 206 is provided with a machine shell 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 divides the taper expander 2 into three identical expander 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 support plate 302 are integrally arc-shaped plates. The top cover plate 301 is arranged recessed. A lower pressure bearing platform is arranged on the top cover plate 301. The support plate 302 is arranged concavely. The support plate 302 is arranged on the working platform 7. The top of the top cover plate 301 is provided with a pressing mechanism.

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

This embodiment can be with casing accurate positioning, and interior, excircle, tang once plastic, and the concentricity is good, and the operation is rapid, convenient, laborsaving, can guarantee higher machining precision and production efficiency.

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, the present embodiment discloses a method for shaping a chassis using the chassis shaping die according to embodiment 1, including the following steps:

1) the taper expanding tire 2 is arranged in an inner cavity of the machine shell 6. The baffle 4 blocks one end of the shell 6 to be open. One end of the housing 6 is fitted into the housing receiving groove ii 401, and the other end is fitted into the housing receiving groove i 207. The taper mandrel 1 is inserted into the inner cavity of the taper expanding tire 2. The screw rod of the screw 5 is screwed into the threaded hole 105 after passing through the baffle 4. 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 expanding tire 2 is adjusted by rotating the screw 5. The first mandrel 102 and the second mandrel 205 are pressed against the expansion blocks 205, causing the expansion blocks 205 to separate from each other, whereby the expansion blocks 205 are pressed against the inner wall of the casing 6. And when the screw 5 can not be fastened again, finishing the shaping of the inner hole of the shell 6.

2) And (5) positioning the machine shell 6 by taking the end shaft 101 as a shaft core to complete the turning of the spigot.

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

Claims

1. The utility model provides a machine shell sizing die which characterized in that: comprises a taper mandrel (1), a taper expanding tire (2), a shaping outer ring (3) and a baffle (4);

the taper mandrel (1) is integrally a stepped rotary body; the taper mandrel (1) comprises an end shaft (101), a first mandrel shaft (102), a connecting shaft (103) and a second mandrel shaft (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 in a circular 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 of the first tire mandrel 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) for screwing the screw (5) into is formed in the center of the small end face; the diameter of the small end face of the first tire mandrel (102) is larger than that of the large end face of the second tire mandrel (104); the diameter of the connecting shaft (103) is smaller than that of the large end face of the second tire mandrel (104);

the taper expanding tire (2) is of a cylindrical structure as a whole; the taper expanding tire (2) is provided with a step-shaped rotary inner cavity; the inner cavity of the taper expanding 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 on the side wall of the taper expansion tire (2); the expansion joint (204) divides the taper expansion tire (2) into three same expansion blocks (205);

the shaping outer ring (3) is integrally 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; a lower pressure bearing platform is arranged on the top cover plate (301); the bearing plate (302) is arranged concavely; the support plate (302) is arranged on the working platform (7).

And a shell accommodating groove II (401) and a hole for a screw (5) to pass through are formed in the surface of the baffle plate (4).

2. A housing sizing die according to claim 1, wherein: the top of the top cover plate (301) is provided with a pressing mechanism.

3. A housing sizing die according to 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 expanding tire (2) is arranged in an inner cavity of the shell (6); the baffle (4) blocks one end of the shell (6) from being opened; one end of the shell (6) is embedded into the shell accommodating groove II (401), and the other end of the shell (6) is embedded into the shell accommodating groove I (207); the taper mandrel (1) is inserted into an inner cavity of the taper expanding tire (2); the screw rod of the screw (5) is screwed into the threaded hole (105) after penetrating through the baffle plate (4); 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 expanding tire (2) is adjusted by rotating the screw (5); the first tire mandrel (102) and the second tire mandrel are pressed against the expansion blocks (205), so that the expansion blocks (205) are separated from each other, and the expansion blocks (205) are pressed against the inner wall of the machine shell (6); when the screw (5) can not be fastened again, the shaping of the inner hole of the shell (6) is completed;

2) the end shaft (101) is used as a shaft core to position the machine shell (6) to complete the turning of the spigot;

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