CN108161302B

CN108161302B - Armature welding positioning device and method for welding armature of moving iron horn

Info

Publication number: CN108161302B
Application number: CN201711418455.5A
Authority: CN
Inventors: 路峰明
Original assignee: Suzhou Glover Precision Technology Co ltd
Current assignee: Suzhou Glover Precision Technology Co ltd
Priority date: 2017-12-25
Filing date: 2017-12-25
Publication date: 2024-01-12
Anticipated expiration: 2037-12-25
Also published as: CN108161302A

Abstract

The invention relates to an armature welding positioning device and an armature welding method of a moving iron horn. Armature welding positioning device includes: the armature positioning movement mechanism is used for limiting the positioning block of the front and back degrees of freedom of the armature, the baffle plate used for limiting the left and right degrees of freedom of the armature and the plane pressure head used for limiting the up and down degrees of freedom of the armature; the positioning block and the baffle are arranged on the armature positioning and moving mechanism; the plane pressure head is arranged above the positioning block and the baffle plate. An armature welding method comprising the steps of: pre-combining a motor component of the moving iron horn with the lower shell; integrally mounting the pre-combined motor assembly and the lower shell on a positioning jig; adjusting the position of the positioning jig according to a preset position and the position of an armature in the motor assembly; and welding the armature according to the adjusted position. The invention realizes the automatic positioning of the armature, solves the problems of poor manual positioning stability and accuracy, and improves the yield and the production efficiency of the moving iron horn.

Description

Armature welding positioning device and method for welding armature of moving iron horn

Technical Field

The invention relates to the field of moving iron horns, in particular to an armature welding positioning device and a moving iron horn armature welding method.

Background

The moving iron horn has the characteristics of small volume, low power consumption and high output, and is widely applied to the fields of hearing aids, hidden communication, high-fidelity earphones and the like. The moving iron loudspeaker mainly comprises core components such as a vibrating diaphragm, a coil, a magnet, an armature and the like. When the moving iron loudspeaker is manufactured, the coil, the magnet and the iron core are assembled into an assembly, then the armature is inserted into the assembly, the position of the armature is fixed through the jig, and finally the armature is welded on two sides of the iron core. Wherein, the assembly cooperation of armature, magnet and iron core has the vital influence to whole moving iron loudspeaker's performance. Therefore, ensuring the welding position of the armature is a precondition for ensuring the excellent performance of the moving iron horn.

In realizing the conventional technology, the inventors found that there are at least the following problems:

at present, the positioning and welding of the armature are realized manually under a microscope by an operator, so that the labor cost is high, the production efficiency is low, and the large-scale mass production is difficult to realize. In addition, because manual operation precision is limited, when using tweezers to position the armature, the armature surface is easy to bend, damage or cause the armature position to deviate, and the yield of products is affected.

Disclosure of Invention

Accordingly, it is necessary to provide an armature welding positioning device for solving the problems of manual armature positioning and low welding production efficiency and yield.

The application provides an armature welding positioner, its characterized in that includes:

the armature positioning and moving mechanism, the positioning block, the baffle plate and the plane pressure head;

the positioning block is arranged on the armature positioning movement mechanism and used for limiting the front-back freedom degree of the armature;

the baffle is arranged on the armature positioning movement mechanism and used for limiting the left and right degrees of freedom of the armature;

the plane pressure head is arranged above the positioning block and the baffle plate and used for limiting the up-down freedom degree of the armature.

In one embodiment, the tail of the positioning block is conical, the baffle is provided with a semicircular notch, and the plane pressure head is square.

In one embodiment, the planar ram has a side length that corresponds to the width dimension of the armature.

In one embodiment, the armature positioning movement mechanism comprises an X-axis guide rail and a Y-axis guide rail, the positioning block is mounted on the Y-axis guide rail, and the baffle is mounted on the X-axis guide rail.

In one embodiment, the device further comprises a cylinder connected with the Y-axis guide rail to control the movement of the baffle mounted on the Y-axis guide rail.

In one embodiment, the armature positioning movement mechanism further comprises a linkage mechanism connected to the cylinder, the X-axis guide rail and the Y-axis guide rail interacting through the linkage mechanism.

In one embodiment, the welding positioning device further comprises a micrometer adjuster, wherein the micrometer adjuster is arranged below the baffle plate and used for adjusting the operation precision of the welding positioning device.

A method for welding the armature of the moving iron horn by adopting the armature welding positioning device comprises the following steps:

pre-combining a motor component of the moving iron horn with the lower shell;

integrally mounting the pre-combined motor assembly and the lower shell on a positioning jig;

adjusting the position of the positioning jig and the position of an armature in the motor assembly according to a preset position;

and welding the armature according to the adjusted position.

In one embodiment, the pre-combining the motor assembly of the moving iron horn with the lower housing includes:

and fixing the motor assembly and the lower shell in a welding mode.

In one embodiment, the welding the armature according to the adjusted position includes:

and welding the armature by adopting a laser welding process according to the adjusted position.

The armature welding positioning device and the armature welding method for the moving iron horn realize automatic positioning of the armature, solve the problem of poor manual positioning stability and accuracy, and improve the yield and production efficiency of the moving iron horn.

Drawings

FIG. 1 is a schematic diagram of a coil assembly provided in one embodiment of the present application;

FIG. 2 is a schematic structural view of an armature provided in one embodiment of the present application;

fig. 3 is a flowchart of a method for welding a moving iron horn armature according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a combined motor assembly and lower housing according to one embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a positioning fixture according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a welding positioning device according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a positioning block according to an embodiment of the present disclosure;

FIG. 8 is a schematic view of a planar indenter provided in one embodiment of the present application;

fig. 9 is a schematic structural diagram of a retainer according to an embodiment of the present application.

101 coil assembly 201 spacer

102 armature 202 positioning block

103 motor assembly 203Y-axis guide rail

104 lower shell 204X-axis guide rail

105 positioning jig 205 link mechanism

106 groove 206 cylinder

Plane pressure head of 207 micrometer regulator 208

209 semi-circular gap

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Whether the mounting position of the armature is accurate has great influence on the performance of the moving iron horn. Not only is the armature and the iron core ensured to be parallel, but also the armature is ensured to be positioned at the center of the mechanical position of the iron core. The more accurate the positioning of the armature, the more stable the sound pressure of the moving iron horn, the less distortion and the better the performance.

Conventional moving iron horn armature assembly is generally divided into two steps, namely armature positioning and armature welding. When positioning the armature, the coil assembly 101 (including the coil and the iron core) shown in fig. 1 is mounted on the lower positioning jig, the armature 102 shown in fig. 2 is inserted into the coil assembly 101, and then the upper positioning jig is closed. Then, the forceps are used to stir the armature 102 so that the front end of the armature 102 enters the positioning jig. The positioning process is completed manually by an operator under a microscope. This results in higher production costs, including labor costs, and lower production efficiency; on the other hand, due to limited manual operation accuracy, the yield of the produced moving iron horn is not high, and particularly, the poor ratio caused by the deviation of the armature position is even more than 50%. In addition, when the tweezers are used for positioning, the tweezers are easy to damage and bend the surface of the armature, so that hidden quality hazards are generated.

When the armature is welded, one side of the armature is welded on the surface of the iron core by adopting a resistance welding mode. The resistance welding is to heat the workpiece to a molten or plastic state by using the resistance thermal effect generated by the current flowing through the contact surface and the adjacent area of the workpiece, thereby achieving the purpose of combining the workpiece. But the manner of resistance welding can cause assembly instability.

Referring to fig. 6, the present application provides an armature welding positioning apparatus, including: positioning motion mechanism, positioning block 202, stop 201 and planar ram 208. The positioning block 202 is mounted on the armature positioning movement mechanism to limit the fore-aft degrees of freedom of the armature 102. A stop 201 is mounted on the armature positioning movement mechanism to limit the left and right degrees of freedom of the armature 102. The planar ram 208 is mounted above the positioning block 202 and the retainer 201 to limit the up and down degrees of freedom of the armature 102.

In one embodiment provided herein, as shown in fig. 7, the tail of the positioning block 202 is tapered.

In one embodiment provided herein, as shown in fig. 9, the retainer 201 has a semicircular notch 209 for a laser beam to be emitted from the notch into the motor assembly 103 to weld the armature 102.

In one embodiment provided herein, as shown in fig. 8, the planar indenter 208 is square. The side length of the planar ram 208 corresponds to the width dimension of the armature 102.

In one embodiment provided herein, the armature weld positioning apparatus further comprises an armature positioning movement mechanism. The armature positioning mechanism includes an X-axis guide rail 204 and a Y-axis guide rail 203. The positioning block 202 is mounted on the Y-axis guide rail 203, and the baffle 201 is mounted on the X-axis guide rail 204.

In one embodiment provided herein, the armature weld positioning apparatus further includes a cylinder 206. A cylinder 206 is connected to the Y-axis guide rail 203 to control movement of the shutter 201 mounted on the Y-axis guide rail 203.

In one embodiment provided herein, the armature positioning movement mechanism further comprises a linkage 205. The link mechanism 205 is connected to a cylinder 206. The X-axis guide rail 204 interacts with the Y-axis guide rail 203 through a linkage 205.

In one embodiment provided herein, the armature weld positioning apparatus further includes a micrometer adjuster 207. A micrometer adjuster 207 is installed below the stopper 201 for adjusting the operation accuracy of the welding positioning device.

The armature welding positioning device can realize automatic positioning of the armature, solves the problem of poor manual positioning stability and accuracy, and improves the yield and production efficiency of the moving iron horn.

Referring to fig. 3, the method for welding the armature of the moving iron horn by adopting the armature welding positioning device provided by the application comprises the following steps:

s100: the motor assembly 103 of the moving iron horn is pre-coupled with the lower housing 104.

Motor assembly 103 includes, among other things, armature 102, an iron core, and a coil. To simplify the positioning difficulty of the motor assembly 103 so as to achieve accurate positioning of the armature 102, the motor assembly 103 of the moving iron horn is previously combined with the lower housing 104. The combined motor assembly 103 and lower housing 104 is shown in fig. 4. After the motor assembly 103 is combined with the lower shell 104, four sides of the lower shell 104 can be utilized for positioning, so that the processing difficulty of the positioning jig 105 is reduced.

In one embodiment provided herein, the method employed to pre-bond the motor assembly 103 of the moving iron horn with the lower housing 104 is to pre-weld the motor assembly 103 with the lower housing 104.

S200: the pre-bonded motor assembly 103 is integrally mounted with the lower housing 104 to the positioning jig 105.

The positioning jig 105 has a polygonal structure, as shown in fig. 5. The positioning jig 105 is provided with a groove 106 matching with the contour of the lower housing 104, and a clamping mechanism is arranged in the groove 106. The clamping mechanism is used to secure the combined motor assembly 103 to the lower housing 104. The positioning jig 105 is also provided with two pin holes for being matched with other components. Other components herein may be a base that can control the movement of the positioning jig 105, thereby changing its position.

In one embodiment provided herein, the positioning jig 105 is trapezoidal. A groove 106 matching with the contour of the lower housing 104 is provided in the central area of the front end of the positioning jig 105, and a spring clip is provided in the groove 106 as a clamping mechanism. The positioning jig 105 is provided with two pin holes at the tail part, which are symmetrical in position and are used for being matched with other components. Other components herein may be a base that can control the movement of the positioning jig 105, thereby changing its position.

The combined motor assembly 103 and the lower housing 104 are placed in the groove 106 of the positioning jig 105, so that the outline of the lower housing 104 matches with the groove 106. The combined motor assembly 103 is clamped with the lower housing 104 by a clamping mechanism, thereby being fixed to the positioning jig 105.

S300: the position of the positioning jig 105 is adjusted according to the preset position, and the position of the armature 102 in the motor assembly 103.

Wherein, the preset position of the positioning jig 105 is located below the welding positioning device. The preset position of armature 102 is at the center of the mechanical position of the core, and armature 102 is parallel to the core.

In one embodiment provided herein, the positioning jig 105 is adjusted to be located at a preset position by controlling the positioning jig 105 to rotate below the armature positioning device through a base matched with the positioning jig 105.

The armature welding positioning device comprises a positioning block 202, a baffle 201 and a plane pressing head 208. The positioning block 202 is used to limit the fore-aft degrees of freedom of the armature 102. The retainer 201 is used to limit the left and right degrees of freedom of the armature 102. The planar ram 208 is used to limit the up and down degrees of freedom of the armature 102. The armature positioning apparatus also includes an armature 102 positioning movement mechanism. Armature 102 positioning mechanism includes an X-axis guide rail 204 and a Y-axis guide rail 203.

In one embodiment provided herein, the positioning jig 105 is first raised to the operating position of the armature positioning device. The operating position should be such that the positioning block 202 can limit the front-back degrees of freedom of the armature 102, the stop 201 can limit the left-right degrees of freedom of the armature 102, and the planar ram 208 can limit the up-down degrees of freedom of the armature 102. Then, the planar ram 208 is moved downward, and the surface of the armature 102 is tapped for a predetermined position and then returned to its original position. The positioning block 202 moves forward to contact the front plane of the armature 102. At this time, since the armature 102 is movable, the position of the armature 102 in the front-rear direction is adjusted with the movement of the positioning block 202 when the armature 102 contacts the positioning block 202. Then, the cylinder 206 of the link mechanism 205 moves forward to drive the left and right shutters 201 to move in a direction approaching each other until the relative distance between the two shutters 201 matches the width of the armature 102, thereby defining the left and right degrees of freedom of the armature 102.

S400: armature 102 is welded according to the adjusted position.

Wherein, the welding of armature 102 is performed by a laser welding process. Laser welding is a highly efficient and precise welding method that uses a laser beam of high energy density as a heat source. Laser welding may be accomplished with a continuous or pulsed laser beam. The principle of laser welding can be divided into thermal conduction welding and laser deep-melting welding.

The principle of the heat conduction type laser welding is as follows: the surface of the workpiece to be processed is heated by laser radiation, and heat of the surface of the workpiece is diffused to the inside by heat conduction. The workpiece is melted by controlling laser parameters such as the width, energy, peak power, repetition frequency and the like of the laser pulse, so that a specific molten pool is formed. After the melted material cools, a weld is formed.

Laser deep-melt welding is typically accomplished using a continuous laser beam. Under high power density laser irradiation, the material evaporates and forms holes. Heat is transferred from the outer wall of this height Wen Kongqiang to melt the metal surrounding the bore. The cavity is filled with high-temperature steam generated by continuous evaporation of the cavity wall material under the irradiation of the light beam. The beam of light continues to enter the cavity and the material outside the cavity flows continuously. The cavity is always in a steady state of flow as the beam moves. The molten metal fills the void left after the void is removed and cools to solidify, thereby forming a weld.

In one embodiment provided herein, after the left-right and front-back degrees of freedom of armature 102 are defined, planar ram 208 is pressed down against the surface of armature 102, securing the position of armature 102. Armature 102 is welded by laser through semicircular notch 209 of spacer 201 so that armature 102 is parallel to the core and remains centered in the mechanical position of the core.

The armature welding method for the moving iron horn realizes automatic positioning of the armature, solves the problem of poor manual positioning stability and accuracy, and improves the yield and production efficiency of the moving iron horn.

For the convenience and better understanding of the present invention, the following describes a specific application scenario of the present invention:

firstly, the motor assembly 103 and the lower shell 104 are welded together, and four sides of the lower shell 104 are utilized for positioning, so that the position of the armature 102 is controlled, and the processing difficulty of the positioning jig 105 is reduced. Then, the combined motor assembly 103 and the lower housing 104 are placed in the groove 106 of the positioning jig 105 and clamped by the clamping mechanism, so that the combined motor assembly 103 and the lower housing 104 are fixed on the positioning jig 105, and subsequent operations are facilitated. Then, the positioning jig 105 is rotated to the lower side of the welding positioning device through the base matched with the positioning jig 105. The positioning jig 105 is moved up to the operating range of the welding positioning device. The planar ram 208 of the weld fixture is moved downward and the surface of the light touch armature 102 is repositioned and then returned to its original position. The positioning block 202 moves forward to contact the front plane of the armature 102. At this time, since the armature 102 is movable, the position of the armature 102 in the front-rear direction is adjusted with the movement of the positioning block 202 when the armature 102 contacts the positioning block 202. Then, the cylinder 206 of the link mechanism 205 moves forward to drive the left and right shutters 201 to move in a direction approaching each other until the relative distance between the two shutters 201 matches the width of the armature 102, thereby defining the left and right degrees of freedom of the armature 102. Finally, planar ram 208 is pressed down against the surface of armature 102, fixing the position of armature 102. Armature 102 is welded by laser through semicircular notch 209 of spacer 201 so that armature 102 is parallel to the core and remains centered in the mechanical position of the core.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The moving iron horn armature welding method is characterized in that an armature welding positioning device is adopted for moving iron horn armature welding, and the method comprises the following steps:

pre-combining a motor component of the moving iron horn with the lower shell;

integrally mounting the pre-combined motor assembly and the lower shell on a positioning jig; the positioning jig is provided with a groove matched with the outline of the lower shell, and a clamping mechanism is arranged in the groove and used for fixing the combined motor assembly and the lower shell;

welding the armature according to the adjusted position;

the armature welding positioning device comprises:

2. The moving iron horn armature welding method of claim 1, wherein the tail of the positioning block is conical, the baffle plate is provided with a semicircular notch, and the planar pressure head is square.

3. The moving iron horn armature welding method of claim 1, wherein the side length of the planar ram is consistent with the width dimension of the armature.

4. The moving iron horn armature welding method of claim 1, wherein the armature positioning movement mechanism comprises an X-axis guide rail and a Y-axis guide rail, the positioning block is mounted on the Y-axis guide rail, and the retainer is mounted on the X-axis guide rail.

5. The moving iron horn armature welding method of claim 4, wherein the armature welding positioning apparatus further comprises a cylinder coupled to the Y-axis guide rail to control movement of the retainer mounted on the Y-axis guide rail.

6. The moving iron horn armature welding method of claim 5, wherein the armature positioning movement mechanism further comprises a linkage mechanism, the linkage mechanism being connected to the cylinder, the X-axis guide rail and the Y-axis guide rail interacting through the linkage mechanism.

7. The moving iron horn armature welding method of claim 1, wherein the armature welding positioning device further comprises a micrometer adjuster mounted below the retainer for adjusting an operation accuracy of the welding positioning device.

8. The method of claim 1, wherein pre-bonding the motor assembly of the moving iron horn to the lower housing comprises:

and fixing the motor assembly and the lower shell in a welding mode.

9. The moving iron horn armature welding method according to claim 1, wherein the welding the armature according to the adjusted position includes: