CN110711918B

CN110711918B - Fixing tool and method for inertial instrument outer ring insulator lead

Info

Publication number: CN110711918B
Application number: CN201910896604.1A
Authority: CN
Inventors: 段荣; 刘宇轩; 胡玉龙; 董清宇; 余正海; 魏容
Original assignee: Beijing Aerospace Control Instrument Institute
Current assignee: Beijing Aerospace Control Instrument Institute
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2021-06-11
Anticipated expiration: 2039-09-23
Also published as: CN110711918A

Abstract

The invention discloses a fixing tool and a fixing method for an inertial instrument outer ring insulator wire. The tool comprises a flexible lead fixing device with a chain structure. The device can be in a ring-shaped closed shape and can be broken into a single-chain structure. When the wire fixing device is fixed on the cylindrical shell of the instrument in an annular shape, the end of the wire can be stably fixed on the insulator by using the fixing hook on the wire fixing device and the elasticity of the wire, so that automatic operations such as tin feeding, welding and the like of a subsequent terminal are facilitated. After welding is finished, the wire fixing device can be conveniently detached from the instrument in a wire surrounding state by utilizing the characteristic that the wire fixing device can be disconnected into a single-chain form.

Description

Fixing tool and method for inertial instrument outer ring insulator lead

Technical Field

The invention relates to the field of instrument and meter assembly, in particular to a fixing tool and a fixing method for an insulator lead of an outer ring of an inertial meter.

Background

Because of the functional requirements of power transmission, signal transmission and the like, and the requirements of insulation, sealing and the like are met, a plurality of insulation terminals are distributed on a cylindrical shell of an inertial instrument (such as a liquid floated gyroscope and the like). At present, the connection of the insulated terminals and the conducting wires adopts a manual electric soldering iron welding mode. With the requirement of increasing the yield and the production efficiency, the drawback of manual welding is more and more prominent, for example, because the insulator is composed of a wire terminal, a glass insulator and a housing base body, improper welding operation (such as improper procedure or too long time) will affect the insulation and sealing performance of the insulator, and therefore, the requirement on the skill and experience of an operator is high; in addition, the quantity of tin and the shape of a welding spot are controlled by manual operation during manual welding, so that the welding spot has poor quality consistency, and the labor intensity of an operator is high and the efficiency is low. The adoption of laser automatic welding not only can get rid of the dependence on the skill of an operator and liberate the operator from heavy manual operation, but also can realize great improvement on the consistency and the efficiency of the quality of a welding spot. However, before laser automatic soldering is realized, the wire to be soldered must be firmly fixed on the insulator in advance, so as to provide guarantee for subsequent tin soldering and soldering.

The insulating terminal is a copper cylinder, before the conducting wire is welded with the insulating terminal, the front end of the conducting wire is made into a ring shape in advance, the conducting wire is sleeved on the insulator, and then welding is carried out. When manual welding is carried out, the fixing of the coil-shaped wire end on the insulated terminal is realized by pressing the fingers of an operator. In the laser automatic welding process, the lead terminal must be fixed by using a special tool. Because of the structural space limit, the space that can be used to the fixed frock of wire on the instrument is very little, and its function is in addition to satisfying fixed wire, still need to satisfy and after the welding is accomplished, can follow the instrument upper surface and tear down. However, at this time, the welded wires are all attached to the surface of the meter, and the tool is enclosed, so that the tool cannot be detached.

How to make this frock both satisfy its function of fixed wire, can dismantle it from the instrument again after accomplishing the welding, be the technological problem that this field will be solved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the fixture and the method overcome the defects of the prior art, and the annular front ends of all wires of the instrument can be stably fixed on the insulator, so that the subsequent automatic welding is guaranteed. After welding is finished, the tool can be detached from the instrument in a state of being surrounded by the lead.

The technical solution of the invention is as follows: a fixing tool for an insulator lead on an outer ring of an inertial instrument comprises a chain-type structure lead fixing tool formed by connecting a plurality of arc-shaped lead pressing blocks; the lead fixing tool is used for fixing the cylindrical surface insulator lead when the lead fixing tool is connected end to end in a closed shape; and when the head and the tail are disconnected into a single chain, the instrument is detached from the instrument.

Each arc-shaped lead pressing block is provided with a plurality of lead fixing hooks, and the leads to be fixed are fixed on the fixing hooks by utilizing the elasticity of the leads to be fixed.

The end-to-end connection and disconnection of the wire fixing tool are realized by utilizing a hook mode.

The lead fixing tool consists of six arc-shaped lead press blocks including an A-shaped arc-shaped lead press block, a B-shaped arc-shaped lead press block and a C-shaped arc-shaped lead press block; six arc-shaped line pressing blocks are connected through five pins to form a chain-shaped wire fixing tool, wherein four A-shaped arc-shaped pressing blocks are connected into a whole, and the B-shaped line pressing blocks and the C-shaped line pressing blocks are connected to two ends of the chain-shaped body respectively.

The A-shaped arc-shaped lead pressing block is an arc-shaped pressing plate with a plurality of pressing claws, a central hook and two side hooks symmetrically distributed along the central hook are arranged at the central position of the A-shaped arc-shaped lead pressing block, and the number of the A-shaped arc-shaped lead pressing blocks is four.

The B-shaped arc-shaped lead pressing block is an arc-shaped pressing plate with a plurality of pressing claws, one end of the B-shaped arc-shaped lead pressing block is provided with a cross rod for fixing, and the number of the B-shaped arc-shaped lead pressing blocks is one.

The C-shaped arc-shaped lead pressing block is an arc-shaped pressing plate with a plurality of pressing claws, one end of the C-shaped arc-shaped lead pressing block is provided with a hook for fixing, and the number of the C-shaped arc-shaped lead pressing blocks is one.

The side hook is a pressing hook for fixing the lead, and an inclination angle for self-locking is arranged on the hook surface of the hook and used for hooking with the cross rod.

The hook of the C-shaped arc-shaped wire pressing block can be freely hooked and released on the cross rod of the B-shaped arc-shaped wire pressing block, the wire fixing tool is in a closed state during hooking, and the wire fixing tool is opened during releasing.

A method for fixing an insulator wire on an outer ring of an inertial instrument, wherein a plurality of insulators are arranged on the cylindrical outer surface of the instrument, the wires are connected with the insulators one by one, and the method comprises the following steps:

1) before laser welding, the front end of a wire which is made into a circular ring shape in advance is stably fixed at the top end of an insulator;

2) the lead fixing tool is encircled on the cylindrical surface of the instrument and is hooked and fixed on the surface of the instrument through a hook and a side hook on the lead fixing tool;

3) after the circular rings at the front ends of the wires are sleeved on the insulator, the circular rings are wound on the central hook and the two side hooks one by one, and the front ends of the wires, namely the parts sleeved on the insulator, are fixed by utilizing the elasticity of the wires; the other end of the wire passes through a flange plate threading hole on the instrument and then is led out;

4) after the laser welding of the lead is finished, the lead fixing tool is changed into a disconnected single-chain structure which can be detached from the instrument from a closed state by loosening the hook and the side hook on the lead fixing tool, and the single-chain structure is detached.

Compared with the prior art, the invention has the advantages that:

the invention is a wire fixing problem which needs to be solved when the traditional manual welding mode is upgraded to the laser automatic welding process. For a long time, the inertia instrument is manually welded under a microscope, when in welding, an operator fixes the lead in a mode of pressing the lead by fingers, and when in laser automatic welding, the operator is not allowed to fix the lead by hands, and a special tool needs to be designed to fix the lead. The fixing of the wire for the inertial instrument needs to solve two problems, 1, the space is extremely limited, the height of the tool needs to be limited within a very small height, otherwise, the instrument cannot be installed in the tool hole of the instrument, and the integral structural shape of the tool is limited; 2, the fixing tool is in a state of being surrounded by welded wires after welding, and the traditional wire pressing tool cannot be taken out and must be broken into a single-chain form to be taken out. The invention adopts the concept of 'watch chain type' to realize the bad effect of only adopting 'rubber band' for fixation, which puzzles us for a long time.

The prior art is that the manual finger presses fixed wire circle form terminal, carries out the welding when pressing a wire terminal promptly for the finger, accomplishes and carries out the fixed and welding of next insulator like this operation again after the welding, because of going on one by one, finger press fixed do not have the problem whether removable after welding. The device is a ring-shaped tool which can be closed and disconnected, is used for fixing all insulator wires in place in advance before laser automatic welding, and achieves the purpose of detaching the insulator wires from an instrument in a state of being surrounded by the wires by utilizing the characteristic of disconnection of the insulator wires after welding.

Drawings

FIG. 1 is a general schematic illustration of the practice of the present invention.

FIG. 2 is a schematic view of a wire fixing tool;

FIG. 3a is a schematic view of an A-type arc compact, FIG. 3B is a schematic view of a B-type arc compact, and FIG. 3C is a schematic view of a C-type arc compact;

fig. 4 a and B show the state of the chain tool when the head (B type) and tail (C type) are disconnected and connected, respectively.

Detailed Description

The present invention will be described in further detail with reference to the following specific examples:

FIG. 1 is a general schematic diagram of an embodiment of the present invention. The instrument 1 has a plurality of insulators 5 on its cylindrical outer surface, and the wires 4 are connected to the insulators 5 one by laser automated welding. Before laser welding, the front end of the lead 4 (which has been previously formed into a circular ring shape) should be stably fixed to the top end of the insulator 5. For this purpose, a wire fixing tool 3 is specially designed, and the wire fixing tool 3 surrounds the cylindrical surface of the instrument and is fixed on the surface of the instrument through self-hook hooking. After the ring at the front end of each wire 4 is sleeved on the insulator, as shown in fig. 1, the ring is wound around three hooks (a central hook 7 and two side hooks 8) one by one, the front end (namely the part sleeved on the insulator) of each wire is fixed by using the elasticity of the wire, and the other end of each wire passes through a flange plate threading hole 2 on the instrument and is led to the other end of each wire. Structurally, it can be seen that after the wire bonding is completed, the wire already surrounds the fixing tool 3. At the moment, the hook (10 and 12) of the fixing tool 3 is loosened, so that the annular fixing tool is changed into a disconnected single-chain structure which can be detached from the instrument from a closed state, and the purpose of detaching the fixing tool 3 from the instrument is realized.

The lead fixing device 3 is composed of six arc-shaped pressing blocks, 6, 9 and 11 in fig. 2 represent A, B and C types respectively:

FIG. 3a shows an A-shaped arc-shaped briquette, which is provided with a central hook 7 and two symmetrically distributed side hooks 8, wherein the number of the A-shaped arc-shaped briquettes is four;

FIG. 3B shows a B-shaped arc-shaped pressing block, which is different from the A-shaped arc-shaped pressing block in that one end of the B-shaped arc-shaped pressing block is provided with a cross rod 10 for fixing, and the number of the B-shaped arc-shaped pressing blocks is one.

Fig. 3C shows a C-shaped arc-shaped pressing block, which is different from the a-shaped pressing block in that one end of the C-shaped arc-shaped pressing block is provided with a hook 12, and the number of the C-shaped arc-shaped pressing blocks is one.

As shown in fig. 2, six arc-shaped pressing blocks are connected by five pins 13 to form a chain-shaped pressing tool 3, wherein four a-shaped arc-shaped pressing blocks are connected to each other to form a whole, and B-shaped pressing blocks and C-shaped pressing blocks are respectively connected to two ends of the chain-shaped body.

Fig. 4 a and B show the state of the chain tool when the head (B type) and tail (C type) are disconnected and connected, respectively. The hook 12 of the C-shaped arc pressing block can be freely hooked and released on the cross rod 10 of the B-shaped arc pressing block, the tool is in a closed state during hooking, and the tool is in an open state during releasing.

The present invention is not limited to the above embodiments, and all modifications, variations, and equivalents of the structure and process steps described in the specification and drawings may be made without departing from the spirit and scope of the present invention.

Claims

1. A fixing method of an inertial instrument outer ring insulator wire relates to a fixture which comprises a chain-type structure wire fixing fixture (3) formed by connecting a plurality of arc-shaped wire pressing blocks; when the lead fixing tool (3) is connected end to end in a closed shape, the lead fixing tool is used for fixing the lead of the insulator (5) with the cylindrical surface; when the head and the tail are disconnected into a single chain shape, the instrument is detached from the instrument;

each arc-shaped lead pressing block is provided with a plurality of lead fixing hooks, and leads to be fixed are fixed on the fixing hooks by utilizing the elasticity of the leads to be fixed;

the end-to-end connection and disconnection of the wire fixing tool (3) are realized by utilizing a hook form;

the lead fixing tool (3) consists of six arc-shaped lead press blocks including an A-shaped arc-shaped lead press block, a B-shaped arc-shaped lead press block and a C-shaped arc-shaped lead press block; six arc-shaped wire pressing blocks are connected through five pins (13) to form a chain-shaped wire fixing tool (3), wherein four A-shaped arc-shaped wire pressing blocks are connected into a whole to serve as a chain-shaped body, and a B-shaped arc-shaped wire pressing block and a C-shaped arc-shaped wire pressing block are respectively connected to two ends of the chain-shaped body;

the A-type arc-shaped lead pressing block is an arc-shaped pressing plate with a plurality of pressing claws, a central hook (7) and two side hooks (8) which are symmetrically distributed along the central hook (7) are arranged at the central position of the A-type arc-shaped lead pressing block, and the number of the A-type arc-shaped lead pressing blocks is four;

the B-shaped arc-shaped lead pressing block is an arc-shaped pressing plate with a plurality of pressing claws, one end of the B-shaped arc-shaped lead pressing block is provided with a transverse rod (10) for fixing, and the number of the B-shaped arc-shaped lead pressing blocks is one;

the C-shaped arc-shaped lead pressing block is an arc-shaped pressing plate with a plurality of pressing claws, one end of the C-shaped arc-shaped lead pressing block is provided with a hook (12) for fixing purpose, and the number of the C-shaped arc-shaped lead pressing blocks is one;

the cylindrical surface of instrument (1) has a plurality of insulators (5), and wire (4) link to each other one by one with each insulator (5), its characterized in that step as follows:

1) before laser welding, the front end of a lead (4) which is made into a circular ring shape in advance is stably fixed at the top end of an insulator (5);

2) the lead fixing tool (3) is arranged on the cylindrical surface of the instrument (1) in a surrounding mode and is fixedly hooked on the surface of the instrument (1) through a hook (12) on the lead fixing tool (3) and a cross rod (10);

3) after the circular rings at the front ends of the wires (4) are sleeved on the insulator, the circular rings are wound on the central hook (7) and the two side hooks (8) one by one, and the front ends of the wires (4), namely the parts sleeved on the insulator, are fixed by utilizing the elasticity of the wires (4); the other end of the wire (4) passes through a flange plate threading hole (2) on the instrument (1) and then is led out;

4) after the laser welding of the lead (4) is finished, the lead fixing tool (3) is changed into a disconnected single-chain structure which can be detached from the instrument (1) from a closed state by loosening the hook (12) and the cross rod (10) on the lead fixing tool (3), and the lead fixing tool is detached.