A wire welding pretreatment device and method for connecting fine wires

Abstract

The present invention discloses a wire welding pretreatment device and method for connecting fine wires, including a wire stripping mechanism, the wire stripping mechanism includes a wire clamping and fixing part, an insulation layer clamping part is arranged in front of the wire clamping and fixing part, the insulation layer clamping part is connected to a first cylinder, the telescopic rod of the first cylinder moves in a direction parallel to the direction of placing the wire, when the cutter of the insulation layer clamping part clamps and cuts the wire, the insulation layer clamping part is driven to move linearly backward by controlling the action of the first cylinder to achieve stripping of the cut insulation layer; a flexible clamping part is arranged between the insulation layer clamping part and the wire clamping and fixing part, and during the backward movement of the insulation layer clamping part, the chuck of the flexible clamping part always clamps the fine wire of the wire and slides along the fine wire. The present invention can quickly and smoothly adjust the to-be-welded segment of a multi-strand wire to a divergent structure, can effectively prevent the fine wires of the multi-strand wire from accumulating together, and facilitates the micro-filament to be inserted into the central area of ​​the multi-strand wire as centrally as possible.

Description

Technical Field

[0001] The invention belongs to the technical field of micro-connection of aerospace electronic devices, and in particular relates to a wire welding pretreatment device and method for connecting micro-filaments. Background Art

[0002] Resistance brazing is usually used to weld the fine wires and wires of aerospace electronic devices. Pretreatment (i.e., pre-welding treatment) is required before welding, and the effect of pretreatment is directly related to the welding quality. In the existing operation mode, the pretreatment of fine wires is mainly acetone cleaning, and the pretreatment of wires mainly includes stripping the insulation layer of the section to be welded and acetone cleaning.

[0003] In the prior art, document CN107538094B discloses a precision resistance brazing method for wires and micro-filaments, and the pretreatment process involved is: first, use wire strippers to remove the insulation skin of the end of the multi-strand wire to be welded, and the stripping part of the wire end is controlled to 4mm, and then use acetone to put the micro-filaments, the processed multi-strand wires, and the solder into an ultrasonic cleaning tank for cleaning, and dry them after cleaning. Subsequently, the multi-strand wires are connected to the first solder, and the micro-filaments are connected to the second solder respectively, and then the two are connected together, but the joints welded using this scheme have the problem that the micro-filaments are seriously biased towards the edge of the welding joint (that is, the edge of the multi-strand wire). In order to achieve the connection of the micro-filaments as centered as possible in the center area of ​​the multi-strand wire, it is necessary to first spread out the sections to be welded of the multi-strand wire by pre-treatment means (essentially spreading out the filaments of the wire), but there is currently no technology and equipment that can meet this requirement. Therefore, it is necessary to provide a multi-strand wire welding pretreatment device and method for connecting fine wires, so as to achieve rapid and smooth adjustment of the to-be-welded segments of the multi-strand wires to a divergent structure. Summary of the invention

[0004] At least in view of the technical problems mentioned in the background technology, the present invention aims to provide a wire welding pretreatment device and method for connecting fine wires.

[0005] The present invention adopts the following technical solution.

[0006] A wire welding pretreatment device for connecting fine wires comprises a wire stripping mechanism, the wire stripping mechanism comprises a wire clamping and fixing part, an insulation layer clamping part is arranged in front of the wire clamping and fixing part, the insulation layer clamping part is connected to a first cylinder, the telescopic rod of the first cylinder moves in a direction parallel to the wire placement direction, when the cutter of the insulation layer clamping part clamps and cuts the wire, the insulation layer clamping part is driven to move linearly backward by controlling the action of the first cylinder to realize stripping of the cut insulation layer; a flexible clamping part is arranged between the insulation layer clamping part and the wire clamping and fixing part, and during the backward movement of the insulation layer clamping part, the clamp of the flexible clamping part always clamps the thin wire of the wire and slides along the thin wire.

[0007] In order to prevent the filaments of the conductor from being scraped off, the clamp of the flexible clamping part has a cotton layer, which is used to directly contact the filaments of the conductor.

[0008] In order to more smoothly adjust the to-be-welded segments of the multi-strand conductor to a divergent structure, the flexible clamping portion includes two symmetrically arranged sleeves, the rear ends of the sleeves are fixedly connected to the clamping seat of the insulating layer clamping portion, a spring is coaxially arranged in each sleeve, the rear end of the spring is always limited, the front end of the spring is connected to a movable rod, some segments of the movable rod are located in the sleeve, and the clamp is provided at the front end of the movable rod; when the clamp is clamped on the conductor, the spring is in a compressed state.

[0009] As a preferred solution, the clamping head of the flexible clamping part includes a silicone head, to which a cotton layer is fixedly connected, and the cotton layer is made of cotton gauze.

[0010] As a preferred solution, the flexible clamping parts are provided in two sets, and the two sets of flexible clamping parts are used to clamp the filaments of the conductor in an oblique direction, and the center lines of the two sets of flexible clamping parts are perpendicular to each other but do not intersect.

[0011] As a preferred solution, the insulating layer clamping part includes a fixed clamping seat and a movable clamping seat, the movable clamping seat is fixedly connected to the second cylinder, and the axis of the second cylinder is perpendicular to the axis of the first cylinder; circular cutting tools are arranged on the working surfaces of the fixed clamping seat and the movable clamping seat facing each other.

[0012] Furthermore, the wire clamping and fixing part includes a fixed block and a movable block, the working surfaces of the fixed block and the movable block are provided with an anti-slip layer, the movable block is connected to the third cylinder, and the axis of the third cylinder is parallel to the axis of the first cylinder; a photoelectric sensor for sensing the wire is provided on the fixed block, and the first cylinder, the second cylinder, the third cylinder and the photoelectric sensor are all connected to the controller.

[0013] A wire welding pretreatment method using the above device, wherein a program that can be run on a processor module is stored on a storage module of the controller, and the processing module implements at least the following steps when executing the program:

[0014] S1, when the photoelectric sensor senses the wire placed between the fixed block and the movable block, the third cylinder is controlled to move, and the wire is clamped by the fixed block and the movable block;

[0015] S2, controls the second cylinder to cut off the insulation layer of the wire through the circular cutting tool;

[0016] S3, controlling the first cylinder to move, driving the insulating layer clamping part to move linearly, during which, on the one hand, the cut insulating layer is driven to axially separate from the wire by the circular cutting tool, and on the other hand, the clamp of the flexible clamping part always clamps the filament of the wire and slides along the filament; in the present invention, the term "always clamps the filament of the wire" should be understood as the clamp clamping the filament from the insulating layer circular cutting part to the end of the filament;

[0017] S4, control the second cylinder and the first cylinder to reset, and continue to execute steps S2 to S3 for several times until the filaments of the wire are divergent.

[0018] In the present invention, the wire is wrapped with at least fifteen filaments, and the diameter of each filament is not greater than 50 μm. It should be noted that when the diameter of each filament is greater than 80 μm, the solution of the present invention cannot adjust the filaments of the wire to a divergent structure because its flexibility does not meet the requirements; when the diameter of each filament is between 60 and 80 μm, the solution of the present invention cannot smoothly adjust the filaments to a divergent structure.

[0019] As a preferred solution, the length of the insulation layer cut off by the circular cutting tool is 8 to 15 mm.

[0020] Beneficial effects: The solution of the present invention can quickly and smoothly adjust the to-be-welded segments of a multi-strand conductor to a divergent structure, can effectively prevent the filaments of the multi-strand conductor from accumulating together, and facilitates the insertion of the micro-filaments into the central area of ​​the multi-strand conductor as centrally as possible; when in use, it is only necessary to adjust the to-be-welded segments of the conductor to a divergent structure when the insulation layer of the to-be-welded segments is peeled off, and the process involved is simple and efficient. Since the filaments of a multi-strand conductor have good flexibility, after applying radial force to the end segments of these filaments, these end segments of the filaments will bend / bend, and the direction of the warping / bending is opposite to the direction of the force application. Therefore, the present invention cleverly achieves the adjustment of the filaments of the to-be-welded segments of the conductor to a divergent structure by means of the technical means of pressing the filaments in the radial direction and sliding along the filaments, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of a wire welding pretreatment device for connecting fine wires in Example 1;

[0022] Figure 2 This is a top view schematic diagram of a wire welding pretreatment device for connecting fine wires in Example 1;

[0023] Figure 3 This is a side view schematic diagram of a wire welding pretreatment device for connecting fine wires in Example 1;

[0024] Figure 4 , Figure 5This is a schematic diagram of the flexible clamping portion in Example 1;

[0025] Figure 6 This is a side view schematic diagram of the flexible clamping portion clamping a conductor in Example 1;

[0026] Figure 7 This is a schematic diagram of the use state of the wire welding pretreatment device for connecting fine wires in Example 1;

[0027] Figure 8 Part (a) is the wire section to be welded after being processed by the comparative solution;

[0028] Figure 8 Part (b) is the wire segment to be welded after being processed by the solution in Example 1. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0030] Combination Figures 1 to 7 As shown, a wire welding pretreatment device for connecting fine wires includes a wire stripping mechanism, which includes a wire clamping and fixing part, and an insulation layer clamping and cutting part is arranged in front of the wire clamping and fixing part. The insulation layer clamping and cutting part is connected to the first cylinder 3, and the moving direction of the telescopic rod of the first cylinder 3 is parallel to the placement direction of the wire 4. When the tool of the insulation layer clamping and cutting part clamps the wire 4, the insulation layer clamping and cutting part is driven to move linearly backward by controlling the action of the first cylinder 3 ( Figure 1 The flexible clamping part is provided between the insulating layer clamping part and the conductor clamping and fixing part. During the backward movement of the insulating layer clamping part, the clamp head 5 of the flexible clamping part always clamps the filament 6 of the conductor and slides along the filament 6. The clamp head 5 of the flexible clamping part has a cotton layer 7, which is used to directly contact the filament 6 of the conductor. The clamp head 5 of the flexible clamping part specifically includes a silicone head 14, on which the cotton layer 7 is fixedly connected. The cotton layer 7 is made of cotton gauze. The clamp head can not only prevent the filament 6 of the conductor from being scratched, but also prevent the filament 6 from being pulled / stretched off, and is also conducive to the smooth and stable sliding of the clamp head 5 along the filament 6.

[0031] In this embodiment, the flexible clamping portion includes two symmetrically arranged sleeves 10, the tail ends of the sleeves 10 are fixedly connected to the clamping seat of the insulating layer clamping portion (the tail end of one sleeve 10 is connected to the fixed clamping seat 30, and the tail end of the other sleeve 10 is connected to the movable clamping seat 31, and the axes of the two sleeves 10 coincide), and a spring 11 is coaxially arranged in each sleeve 10, and the tail end of the spring 11 is always limited (the tail end of the spring 11 is against the inner wall section of the sleeve 10), the front end of the spring 11 is connected to the movable rod 12, and some sections of the movable rod 12 are located in the sleeve 10, and the clamp 5 is arranged at the front end of the movable rod 12; when the clamp 5 is clamped on the wire, the spring 11 is in a compressed state.

[0032] Two sets of flexible clamping parts are used to clamp the filaments 6 of the conductor in the horizontal direction, and the center lines of the two sets of flexible clamping parts are perpendicular to each other but do not intersect.

[0033] In this embodiment, the insulating layer cutting part includes a fixed clamp seat 30 and a movable clamp seat 31, the movable clamp seat 31 is fixedly connected to the second cylinder 13, and the axis of the second cylinder 13 is perpendicular to the axis of the first cylinder 3; a circular cutting tool 32 is arranged facing each other on the working surfaces of the fixed clamp seat 30 and the movable clamp seat 31. The circular cutting tool 32 is a circular blade composed of two semicircular blades, and the diameter of the circular blade is equal to the diameter of the inner wall of the wire insulation layer, wherein a tool to which one blade belongs is installed on the working surface of the fixed clamp seat 30, and a tool to which the other blade belongs is installed on the working surface of the movable clamp seat 31, and the centers of the tools to which the two blades belong are located on the same vertical plane.

[0034] In this embodiment, the wire clamping and fixing part includes a fixed block 20 and a movable block 21. The working surfaces of the fixed block 20 and the movable block 21 are provided with an anti-slip layer. The movable block 21 is connected to the third cylinder 22, and the axis of the third cylinder 22 is parallel to the axis of the first cylinder 3. A photoelectric sensor for sensing the wire 4 is provided on the fixed block 20, and the first cylinder 3, the second cylinder 13, the third cylinder 22, and the photoelectric sensor are all connected to the controller.

[0035] A wire with a specification of "a wire 4 wrapped with about thirty strands of filaments 6, each strand of filament 6 having a diameter of about 20 μm" is pre-processed, and the wire welding pre-processing method of the device in this embodiment is adopted. The storage module of the controller stores a program that can be run on the processor module, and when the processing module executes the program, at least the following steps are implemented:

[0036] S1, when the photoelectric sensor senses the wire 4 placed between the fixed block 20 and the movable block 21 (Note: when placing the wire, the insulating layer of the wire needs to be placed in the semicircular space where the blade is located), the third cylinder 22 is controlled to move, and the telescopic rod of the third cylinder 22 extends to drive the movable block 21 to move toward the fixed block 20, and the wire 4 is clamped by the fixed block 20 and the movable block 21;

[0037] S2, control the second cylinder 13 to move, the telescopic rod of the second cylinder 13 extends to drive the movable clamp seat 31 to move toward the fixed clamp seat 30, so that the blade of the circular cutting tool 32 presses and cuts the insulation of the wire 4 (in this process, the two semicircular blades together form a circular blade), that is, the insulating layer of the wire 4 is cut off by the circular cutting tool 32, and the length of the cut insulating layer is controlled to be 12mm;

[0038] S3, control the first cylinder 3 to move, driving the insulation layer cutting part to move linearly ( Figure 1 During this process, on the one hand, the cut insulating layer is driven to axially separate from the conductor 4 by the circular cutting tool 32 (the circular cutting tool 32 plays the role of pushing / detaching the cut insulating layer during this process), and on the other hand, the chuck 5 of the flexible clamping portion always clamps the filament 6 of the conductor and slides along the filament 6. In the process of clamping the filament 6, the chuck 5 applies a radial force to the filament 6;

[0039] S4, control the second cylinder 13 and the first cylinder 3 to reset, and continue to perform steps S2 to S3 twice until the filaments 6 of the wire are divergent. Figure 8 As shown in part (b) of the figure, it can be clearly seen that the filaments of the wire spread out radially.

[0040] Comparative solution: Referring to Example 1, the difference between it and Example 1 is that the flexible clamping part is omitted. The operation steps are: when the photoelectric sensor senses the wire 4 placed between the fixed block 20 and the movable block 21, the third cylinder 22 is controlled to act, and the telescopic rod of the third cylinder 22 is extended to drive the movable block 21 to lean against the fixed block 20, and the wire 4 is clamped by the fixed block 20 and the movable block 21; the second cylinder 13 is controlled to act, and the telescopic rod of the second cylinder 13 is extended to drive the movable clamp seat 31 to lean against the fixed clamp seat 30, so that the blade of the circular cutting tool 32 presses and cuts the insulation of the wire 4 (in this process, the circular blade is formed by two semicircular blades), that is, the insulating layer of the wire 4 is cut off by the circular cutting tool 32, and the length of the cut insulating layer is controlled to be 12mm; the first cylinder 3 is controlled to act, driving the insulating layer clamping part to move linearly ( Figure 1 The wire 4 is linearly moved backward in the direction indicated by the arrow in the middle). During this process, the cut insulating layer is driven to axially separate from the wire 4 by the circular cutting tool 32 (the circular cutting tool 32 plays the role of pushing / detaching the cut insulating layer in this process). In this solution, only the insulating layer of the wire segment to be welded can be peeled off smoothly. The state after peeling is as follows: Figure 8 As shown in part (a) of the figure, it can be clearly seen that the filaments of the wire are still gathered together in bundles.

[0041] In this embodiment, it is only necessary to adjust the wire to a divergent structure when the insulation layer of the wire segment to be welded is peeled off, and the process involved is simple and efficient. Since the filaments 6 of the multi-strand wire have good flexibility, after applying radial force to the end segments of these filaments 6, these end segments of the filaments 6 will bend / bend, and the warping / bending direction is opposite to the force application direction. This embodiment cleverly achieves the adjustment of the filaments 6 of the wire segment to be welded to a divergent structure by means of the technical means of pressing the filaments 6 in the radial direction and sliding along the filaments 6, which is very convenient. In this embodiment, the flexible clamping portion used is very critical. When the telescopic rod of the second cylinder 13 extends to drive the movable clamping seat 31 to lean against the fixed clamping seat 30, the clamp 5 of the flexible clamping portion first clamps the insulating layer of the wire (the non-peeled part), and then when the insulating layer clamping portion moves linearly backward, the clamp 5 will clamp the filament 6 of the wire. In the process of switching from clamping the insulating layer to clamping the filament 6, the dimensional change caused by the adaptive position switching of the spring 11 and the clamp 5 is utilized, thereby ensuring that the clamp 5 always clamps / presses the filament 6. Example 2

[0042] A wire welding pretreatment device for connecting fine wires has an overall structure referring to Example 1, and the difference from Example 1 is that: the flexible clamping portion is independently installed between the clamping seat of the insulating layer clamping portion and the wire clamping fixing portion; the flexible clamping portion includes two symmetrically arranged sleeves 10, wherein the tail end of one sleeve 10 is fixedly connected to the fourth cylinder, and the other sleeve 10 is always fixed, and a spring 11 is coaxially arranged in each sleeve 10, and the tail end of the spring 11 is always limited (the tail end of the spring 11 abuts against the inner wall section of the sleeve 10), the front end of the spring 11 is connected to a movable rod 12, and a partial segment of the movable rod 12 is located in the sleeve 10, and a chuck 5 is provided at the front end of the movable rod 12; when the chuck 5 is clamped on the wire, the spring 11 is in a compressed state.

[0043] A wire welding pretreatment method using the device in Example 2, wherein a program that can be run on a processor module is stored on a storage module of the controller, and when the processing module executes the program, at least the following steps are implemented:

[0044] S1, when the photoelectric sensor senses the wire 4 placed between the fixed block 20 and the movable block 21, the third cylinder 22 is controlled to move, and the telescopic rod of the third cylinder 22 extends to drive the movable block 21 to move toward the fixed block 20, and the wire 4 is clamped by the fixed block 20 and the movable block 21;

[0045] S2, control the second cylinder 13 to move, the telescopic rod of the second cylinder 13 extends to drive the movable clamp seat 31 to move toward the fixed clamp seat 30, so that the blade of the circular cutting tool 32 presses and cuts the insulation of the wire 4 (in this process, the two semicircular blades together form a circular blade), that is, the insulating layer of the wire 4 is cut off by the circular cutting tool 32, and the length of the cut insulating layer is controlled to be 12mm;

[0046] S3, controls the first cylinder 3 to move, driving the insulating layer cutting part to move linearly (refer to Figure 1 The cut insulating layer is moved linearly backward in the direction indicated by the middle arrow), during which the cut insulating layer is driven to axially separate from the conductor 4 by the circular cutting tool 32 (the circular cutting tool 32 plays a role in pushing / detaching the cut insulating layer in this process);

[0047] While controlling the first cylinder 3 to move, the fourth cylinder is controlled to move, driving the clamp 5 to always clamp the wire, and in the process of linear movement of the insulation layer clamping portion, the clamp 5 can clamp the filament 6 of the wire and slide along the filament 6, and in the process of clamping the filament 6, the clamp 5 applies radial force to the filament 6;

[0048] S4, control the second cylinder 13 and the first cylinder 3 to reset, and continue to perform steps S2-S3 three times until the filaments 6 of the wire are divergent.

[0049] By adopting the scheme of the present invention, the to-be-welded segments of the multi-strand conductor can be quickly and smoothly adjusted to a divergent structure. In particular, by adopting the scheme in Example 1, it only takes about ten seconds to adjust the filaments of the multi-strand conductor to a divergent structure and successfully complete the stripping of the insulation layer. This can effectively prevent the filaments of the multi-strand conductor from accumulating together, making it easier to insert the fine filaments into the center area of ​​the multi-strand conductor as centrally as possible.

Claims

1. A wire welding pretreatment method, using a wire welding pretreatment device, including a wire stripping mechanism, characterized in that: The wire stripping mechanism comprises a wire clamping and fixing portion, an insulation layer clamping and cutting portion is arranged in front of the wire clamping and fixing portion, the insulation layer clamping and cutting portion is connected to a first cylinder (3), the telescopic rod of the first cylinder (3) moves in a direction parallel to the placement direction of the wire (4), and when the cutter of the insulation layer clamping and cutting portion clamps and cuts the wire (4), the insulation layer clamping and cutting portion is driven to move linearly backward by controlling the action of the first cylinder (3) to achieve stripping of the cut insulation layer; a flexible clamping portion is arranged between the insulation layer clamping and cutting portion and during the backward movement of the insulation layer clamping and cutting portion, the flexible clamping portion The clamping head (5) of the clamping part always clamps the thin wire (6) of the conductor and slides along the thin wire (6); the flexible clamping part comprises two symmetrically arranged sleeves (10), the rear ends of the sleeves (10) are fixedly connected to the movable clamping seat (31) of the insulating layer clamping part, and a spring (11) is coaxially arranged in each sleeve (10), the rear end of the spring (11) is always limited, the front end of the spring (11) is connected to the movable rod (12), a part of the movable rod (12) is located in the sleeve (10), and the clamping head (5) is arranged at the front end of the movable rod (12). ; When the clamp (5) is clamped on the conductor, the spring (11) is in a compressed state; the flexible clamping portion is provided with two sets, the two sets of flexible clamping portions are used to clamp the filaments (6) of the conductor in an oblique direction, and the center lines of the two sets of flexible clamping portions are perpendicular to each other but do not intersect; the insulating layer clamping portion comprises a fixed clamping seat (30) and a movable clamping seat (31), the movable clamping seat (31) is fixedly connected to the second cylinder (13), and the axis of the second cylinder (13) is perpendicular to the axis of the first cylinder (3); between the fixed clamping seat (30) and the movable clamping seat (31 ) are provided with a circular cutting tool (32) facing the working surfaces of the first cylinder (3); the wire clamping and fixing portion comprises a fixed block (20) and a movable block (21); the working surfaces of the fixed block (20) and the movable block (21) are provided with an anti-slip layer; the movable block (21) is connected to the third cylinder (22); the axis of the third cylinder (22) is parallel to the axis of the first cylinder (3); a photoelectric sensor for sensing the wire (4) is provided on the fixed block (20); the first cylinder (3), the second cylinder (13), the third cylinder (22), and the photoelectric sensor are all connected to a controller; The wire (4) is wrapped with at least fifteen strands of filaments (6), and the diameter of each strand of filament (6) is not greater than 50 μm; The storage module of the controller stores a program that can be run on the processor module. When the processor module executes the program, at least the following steps are implemented: S1, when the photoelectric sensor senses the wire (4) placed between the fixed block (20) and the movable block (21), the third cylinder (22) is controlled to operate, thereby clamping the wire (4) through the fixed block (20) and the movable block (21); S2, controlling the second cylinder (13) to operate, and cutting off the insulation layer of the wire (4) by means of the circular cutting tool (32); S3, controlling the first cylinder (3) to move, driving the insulating layer clamping and cutting part to move linearly, during which, on the one hand, the cut insulating layer is driven to axially separate from the wire (4) by the circular cutting tool (32), and on the other hand, the clamping head (5) of the flexible clamping part always clamps the thin wire (6) of the wire and slides along the thin wire (6); S4, controlling the second cylinder (13) and the first cylinder (3) to reset, and continuing to perform steps S2 to S3 for several times until the filaments (6) of the wire are in a divergent shape.

2. The wire welding pretreatment method according to claim 1, characterized in that: The clamping head (5) of the flexible clamping part has a cotton layer (7), and the cotton layer (7) is used for directly contacting the filaments (6) of the conductor.

3. The wire welding pretreatment method according to claim 2, characterized in that: The clamping head (5) of the flexible clamping portion comprises a silicone head (14), to which a cotton layer (7) is fixedly connected, and the cotton layer (7) is made of cotton gauze.

4. The wire welding pretreatment method according to claim 3, characterized in that: The length of the insulating layer cut off by the circular cutting tool (32) is 8 to 15 mm.

Images