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CN-122026191-A - Carbon brush frame tail insert assembly machine

CN122026191ACN 122026191 ACN122026191 ACN 122026191ACN-122026191-A

Abstract

The invention relates to the technical field of electric brush assembly, in particular to a carbon brush frame tail inserting and assembling machine. Comprises a frame, a rotary indexing device and a plurality of workpiece carriers uniformly distributed along the periphery of a turntable. The rotary indexing device comprises a fixed disc, a rotary disc and a driving assembly, and drives the workpiece carrier to intermittently rotate. The device comprises a power terminal, a resistor welding module, a pin cutting module, a visual detection module, a sorting and blanking module and a sorting and blanking module, wherein the power terminal is provided with a resistor, the resistor welding module is connected with the resistor, the pin cutting module is used for cutting off redundant pins, the visual detection module is used for detecting optical size, and the sorting and blanking module is used for sorting qualified and unqualified workpieces according to detection results. The work flow comprises the steps of after feeding, bending, welding, cutting, detecting and sorting the workpieces, so that automatic production is realized, and the efficiency, welding quality consistency and product qualification rate are improved.

Inventors

  • PAN HUAJUN
  • LAN HUIQIN
  • WU QILIN
  • Xiang Fangjie
  • ZHENG JIAQI
  • HE JIANQIAO

Assignees

  • 丽水强润电子有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (9)

  1. 1. A carbon brush frame tail insertion assembly machine, characterized by comprising: a frame (1); The rotary indexing device is arranged on the frame (1) and comprises a fixed disc (3), a rotary disc (4) rotatably arranged below the fixed disc (3) and a driving assembly for driving the rotary disc (4) to perform intermittent indexing rotation; A plurality of workpiece carriers (6) which are uniformly distributed along the periphery of the turntable (4) and rotate along with the turntable; The following functional modules are arranged on the frame (1) in sequence around the rotary indexing device: the feeding station is configured to enable an operator to load a connector power terminal shell assembled with a piezoresistor to be welded to the workpiece carrier (6); the bending forming module (8) is used for plastically bending pins of the piezoresistor; The resistance welding module (9) is used for connecting the bent pins with the power supply terminals through a resistance welding process; the pin cutting module (10) is used for cutting off redundant pin parts after welding; the visual detection module (11) is used for carrying out optical size detection on the welded and cut workpiece; The sorting and blanking module (12) is used for respectively conveying the qualified workpieces and the unqualified workpieces according to the detection result; The assembling machine comprises a working process that an operator loads a workpiece to a workpiece carrier (6) at the feeding station, the workpiece carrier (6) bears the workpiece to intermittently rotate along with a turntable (4) and sequentially passes through subsequent functional modules, a bending forming module (8) bends and forms vertical pins, a resistance welding module (9) then resistance welds the bent and formed pins and a power terminal into a whole, a pin cutting module (10) cuts out overlong pin parts after welding, a visual detection module (11) images and analyzes the size of the welded and cut workpiece, and finally a sorting and blanking module (12) sorts and blanking the workpiece according to analysis results.
  2. 2. The carbon brush frame tail inserting and assembling machine according to claim 1, wherein a supporting component (13) is arranged below the edge of the rotary table (4) corresponding to each functional module station, the supporting component (13) comprises a supporting rod (14) and a roller (15) arranged at the top end of the supporting rod, the roller (15) is in rolling contact with the bottom surface of the rotary table (4) to provide auxiliary support, and the roller (15) is continuously in contact with the bottom surface of the rotary table (4) in the rotating and static bearing processes of the rotary table (4) to enhance the structural stability of the edge of the rotary table (4) at the station.
  3. 3. The carbon brush frame tail insertion assembly machine according to claim 1, wherein the bending forming module (8) includes: The outer side supporting mechanism is arranged on the radial outer side of the rotary table (4) and comprises a first sliding table (17) capable of moving radially, a first linear driver (18) for driving the first sliding table (17), a first clamping cylinder (19) arranged on the first sliding table (17) and a pair of supporting clamping jaws (20) connected to two output ends of the first clamping cylinder (19), and the front end working surfaces of the supporting clamping jaws (20) are in a circular arc shape; The bending execution mechanism is arranged on the radial inner side of the turntable (4) and comprises a stand column (22), a vertical sliding table (23) arranged on the stand column (22), a second linear driver (24) for driving the vertical sliding table (23), a bending cylinder (25) arranged on the vertical sliding table (23) and a pair of bending pressure heads (26) connected to the output end of the bending cylinder (25); an auxiliary positioning cylinder (27) is further mounted on the vertical sliding table (23), and the output end of the auxiliary positioning cylinder (27) is connected with a pair of inner side positioning clamping jaws (28) with adjustable intervals; The bending machine comprises a bending station, a support clamping jaw (20) of an outer support mechanism extends to the outer side of a pin in advance when a carrier carrying a workpiece is stopped at the bending station, and then a vertical sliding table (23) of a bending execution mechanism drives an inner side positioning clamping jaw (28) and a bending pressure head (26) to move downwards, so that the inner side positioning clamping jaw (28) moves to the inner side between two pins and is positioned, and meanwhile, a bending cylinder (25) drives the bending pressure head (26) to push forwards to press the pin to the arc working surface of the support clamping jaw (20), so that arc bending is completed.
  4. 4. The carbon brush frame tail insertion assembly machine according to claim 1, characterized in that the resistance welding module (9) comprises: a welding frame (29); The vertical adjusting mechanism is arranged on the welding frame (29) and comprises a first vertical sliding rail (31) and a first lifting cylinder (32) for driving the first vertical sliding rail to move; The horizontal adjusting mechanism is arranged on a movable part of the vertical adjusting mechanism and comprises a horizontal sliding rail (34) and an adjusting cylinder (35) for driving the horizontal sliding rail to move; The welding execution assembly is fixed on a movable part of the horizontal adjustment mechanism and comprises a mounting bracket (37), an electrostatic electrode seat (38) fixed on the mounting bracket (37) and an movable electrode seat (39) which is arranged opposite to the electrostatic electrode seat (38) and can be driven to approach or depart by a propulsion cylinder (40), a static electrode head (41) is arranged at the lower end of the electrostatic electrode seat (38), and a movable electrode head (42) is arranged at the lower end of the movable electrode seat (39); The workpiece pressing mechanism is hinged on the frame (1) and driven by a rotary driving piece (44) and is provided with a pressing arm (45) capable of swinging to the upper part of the workpiece carrier (6) and pressing a workpiece; The welding machine comprises a workpiece, a pressing arm (45) of a workpiece pressing mechanism firstly swings downwards to press the workpiece when the workpiece reaches a welding station, a vertical adjusting mechanism drives a welding execution assembly to integrally descend to enable an electrostatic electrode head (41) and a movable electrode head (42) to be aligned with the inner side of a power terminal on the workpiece and the outer side of a bent pin respectively, a pushing cylinder (40) drives a movable electrode seat (39) to move towards the electrostatic electrode seat (38) to enable the movable electrode head (42) to press the pin on the power terminal, then the two electrode heads are electrified to perform resistance welding, and after welding is completed, the electrode heads are reset and the pressing arm (45) is lifted.
  5. 5. The carbon brush frame tail insertion assembly machine according to claim 1, wherein the pin clipping module (10) includes: A mounting base (46) fixed to the frame (1); The clamping and transferring unit is arranged on the mounting base (46) and comprises a second sliding table (48) capable of moving radially, a third linear driver (49) for driving the second sliding table (48), a second clamping cylinder (50) arranged on the second sliding table (48), and a pair of cutting clamping jaws (51) connected to the output end of the second clamping cylinder (50) and used for clamping the tail ends of pins; The shearing unit is arranged at the upper part of the mounting base (46) and comprises a second vertical sliding rail (53), a second lifting cylinder (54) for driving the second vertical sliding rail (53) and a shearing assembly (55) which is arranged on a movable part of the second vertical sliding rail (53) and is driven by a shearing cylinder (56); the waste collection device (57) is arranged beside the turntable (4) and is used for receiving the cut pins; The clamping and transferring unit is firstly moved radially to enable the cutting clamping jaw (51) to clamp the tail end of the pin which extends out after welding, then the shearing unit is lowered, the shearing assembly (55) acts to shear the pin outside the clamping point, then the clamping and transferring unit is retracted radially to the position above the waste collecting device (57), and the cutting clamping jaw (51) is loosened to enable the sheared pin to fall into the waste collecting device (57).
  6. 6. The carbon brush frame tail inserting and assembling machine according to claim 1, wherein the sorting and blanking module (12) is a three-axis rectangular coordinate robot, and comprises an X-axis linear module (59), a Y-axis linear module (60) and a Z-axis linear module (61) which are arranged orthogonally to each other and are sequentially connected in a transmission mode, and a picking and placing end effector (62) arranged on a movable part of the Z-axis linear module (61), and the working process is that the three-axis rectangular coordinate robot drives the picking and placing end effector (62) to move to a corresponding workpiece carrier (6) to pick workpieces according to an output signal of a visual detection module (11) and then moves the workpieces to a qualified product assembly line or a unqualified product recovery position.
  7. 7. The carbon brush frame tail insertion assembly machine according to claim 1, wherein a positioning cavity (63) is formed in the workpiece carrier (6) and is used for accommodating and positioning a part of the power terminal seat, on which the piezoresistor is mounted, and a main body of the piezoresistor, and exposing pins of the piezoresistor and a part to be welded of the power terminal, and the part of the workpiece is restrained in the positioning cavity (63) when the feeding station and the subsequent stations operate, and only a part to be processed is exposed.
  8. 8. The carbon brush frame tail insertion assembly machine according to claim 4, wherein the resistance welding module (9) is integrated with a displacement sensor and a pressure sensor, and is used for monitoring and feeding back the displacement change of the movable electrode head (42) and the applied pressure in real time in the welding process, and the working process is that the displacement sensor and the pressure sensor collect data in real time in the process of driving the movable electrode head (42) to press a workpiece by the pushing cylinder (40) and compare the data with a preset threshold value so as to monitor and ensure the stability and consistency of the welding pressure.
  9. 9. The carbon brush frame tail insertion assembly machine according to claim 1, wherein the visual detection module (11) comprises an industrial camera vertically installed towards the workpiece, the industrial camera is configured to acquire an image of the workpiece and accordingly detect the total thickness of a welding area, the residual length of a pin after cutting and the distance between two power terminals, the industrial camera shoots a clear image of the top of the workpiece when the workpiece is stopped at a detection station, and the image processing system analyzes and measures the image and compares the measurement result with a preset tolerance range to judge whether the workpiece is qualified or not.

Description

Carbon brush frame tail insert assembly machine Technical Field The invention relates to the technical field of electric brush assembly, in particular to a carbon brush frame tail inserting and assembling machine. Background The carbon brush frame tail plug is used as a core connecting component in a motor and an electrical control system, and the manufacturing precision and the assembly quality of the carbon brush frame tail plug directly determine the stability of circuit operation and the service life of equipment. In the traditional production mode, the assembly of the components completely depends on manual operation, namely, operators need to pre-assemble the piezoresistor and the connector power terminal shell manually, and then use an electric soldering iron to match with soldering wires to solder the pins of the piezoresistor with the power terminal one by one. The manual operation mode has the technical defects that the production rhythm is slow, the time consumption of single operation is too long, the whole productivity of a production line is severely limited, the welding quality is completely limited by the technical experience and the instant state of operators, defects such as cold welding, irregular welding spot shape and the like are extremely easy to generate, abnormal electrical connection impedance is caused, local overheating and even circuit failure can be possibly caused in the long-term operation of equipment, meanwhile, the manual welding cannot apply uniform and quantifiable pressure to welding spots, the pressure fluctuation range is large, the dynamic monitoring capability of the welding process is lacked, and the welding abnormality cannot be identified and intervened in time. To address the above challenges, the prior art has attempted to introduce partially automated elements, such as using a basic rotary indexing table in combination with simple pneumatic clamps to effect workpiece circulation, or configuring a dedicated welding device at a single station. However, the schemes have obvious limitations that the system integration level is insufficient, a complete automatic closed-loop flow of plastic bending, resistance welding, post-welding trimming and quality sorting of pins cannot be constructed, particularly in a key link of resistance welding, the real-time acquisition and closed-loop regulation and control mechanism of core parameters such as welding pressure, electrode displacement and the like are generally lost, so that welding quality fluctuation is difficult to inhibit, and in addition, high-precision online visual detection means are lacked for key size characteristics (such as total thickness of welding spots, residual length of pin cutting, power terminal spacing and the like) after welding is finished, so that 100% finished product quality screening cannot be realized. Therefore, the existing equipment cannot effectively improve the production efficiency, and cannot guarantee the high consistency of the product in the electrical performance and the mechanical structure, so that the severe requirements of the modern industry on the high-reliability connecting parts cannot be met. In view of the above, there is a need in the art for improvements. Disclosure of Invention In order to solve the problems, the invention aims to provide a carbon brush frame tail inserting and assembling machine, which has the advantages of improving production efficiency, ensuring consistency of welding quality, realizing automatic closed-loop production and improving reliability and qualification rate of products. In order to achieve the above purpose, the present invention adopts the following technical scheme: the application provides a carbon brush frame tail inserting and assembling machine, which has the following technical scheme: A carbon brush frame tail insertion assembly machine, comprising: A frame; The rotary indexing device is arranged on the frame and comprises a fixed disc, a rotary disc rotatably arranged below the fixed disc and a driving assembly for driving the rotary disc to perform intermittent indexing rotation; The plurality of workpiece carriers are uniformly distributed along the periphery of the turntable and rotate along with the turntable; the following functional modules are arranged on the frame in sequence around the rotary indexing device: The feeding station is configured for an operator to load the connector power terminal shell assembled with the piezoresistor to be welded to the workpiece carrier; The bending forming module is used for plastically bending pins of the piezoresistor; the resistance welding module is used for connecting the bent pins with the power supply terminals through a resistance welding process; the pin cutting module is used for cutting off redundant pin parts after welding; the visual detection module is used for carrying out optical size detection on the welded and cut workpiece; the sorting and blanking module is used for r