CN210957249U

CN210957249U - Automatic terminal machine

Info

Publication number: CN210957249U
Application number: CN201922239215.XU
Authority: CN
Inventors: 唐许军
Original assignee: Dongguan Kaifu Automation Technology Co ltd
Current assignee: Dongguan Kaifu Automation Technology Co ltd
Priority date: 2019-12-14
Filing date: 2019-12-14
Publication date: 2020-07-07
Anticipated expiration: 2029-12-14

Abstract

The utility model discloses an automatic change terminal machine, it includes: the electric cabinet, human-computer interface, transport mechanism, leveling mechanism, wire stripping mechanism, beat terminal mechanism and discharge mechanism, human-computer interface, leveling mechanism, wire stripping mechanism, discharge mechanism arranges in proper order from right side to left side with beating terminal mechanism and sets up in the upper end rear portion of electric cabinet, transport mechanism sets up in leveling mechanism, wire stripping mechanism, discharge mechanism and the front end of beating terminal mechanism, transport mechanism is used for handling waiting to beat the terminal wire rod and handling to different station departments, leveling mechanism is used for flattening with waiting to beat the terminal wire rod and smoothes out, make the wire rod be located same horizontal plane, wire stripping mechanism is used for peeling off the insulating skin of waiting to beat the terminal wire rod, beat terminal mechanism and be used for beating the terminal on waiting to beat the terminal wire rod, discharge mechanism is used for carrying out the ejection of compact with having beaten the terminal wire rod. The utility model discloses degree of automation is high, and the operation is smooth, only needs to wait to beat the terminal wire rod and places the automation of accomplishing the wire rod in transport mechanism department and beat the terminal function, and the practicality is strong.

Description

Automatic terminal machine

Technical Field

The utility model belongs to the technical field of beat the terminal technique and specifically relates to an automatic change terminal machine.

Background

With the continuous development of society and the continuous development of scientific level and the continuous development of human industrial civilization, more and more enterprises choose to adopt machining, and the machining slowly replaces manual operation. At present, a common processing workshop or a manufacturer also adopts a manual operation wire pressing pliers to press a terminal on a wire, and the processing mode has great damage to the hand of an operator, and meanwhile, the manually pressed terminal is easy to drop and generate errors, and the accuracy is low, so that a technical person in the field invents a terminal machine to press the terminal on the wire.

Therefore, the market needs an automatic terminal machine which has high automation degree and smooth operation and can complete the automatic terminal punching function of the wire rod only by placing the wire rod to be punched at the conveying mechanism.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide an automatic terminal machine to the problem among the above-mentioned prior art, degree of automation is high, and the operation is smooth, only needs to wait to beat the terminal wire rod and places the automation of accomplishing the wire rod in transport mechanism department and beat the terminal function, and the practicality is strong.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

an automated terminal machine, comprising: the automatic terminal punching machine comprises an electric cabinet, a human-computer interface, a conveying mechanism, a leveling mechanism, a wire stripping mechanism, a terminal punching mechanism and a discharging mechanism, wherein the human-computer interface, the leveling mechanism, the wire stripping mechanism, the discharging mechanism and the terminal punching mechanism are sequentially arranged at the rear part of the upper end of the electric cabinet from right to left, the conveying mechanism is arranged at the front end of the leveling mechanism, the wire stripping mechanism, the discharging mechanism and the terminal punching mechanism, the conveying mechanism is used for conveying a terminal wire to be punched to different stations for processing, the leveling mechanism is used for leveling and smoothing the terminal wire to be punched to enable the wire to be located on the same horizontal plane, the wire stripping mechanism is used for stripping an insulating skin of the terminal wire to be punched, the terminal punching mechanism is used for punching a terminal on the terminal wire to be punched, and the discharging mechanism is used for discharging the terminal wire to be.

As a further elaboration of the above technical solution:

in the technical scheme, transport mechanism includes conveying motor, lead screw, screw-nut, straight flange, transmission piece, lead screw fixing base, fixed connection block, first cylinder and conveying pneumatic clamping jaw, the both ends of lead screw are fixed in respectively on the lead screw fixing base and wherein one end is connected with conveying motor, screw-nut and straight flange all set up on the lead screw is located to the inside of transmission piece and cover, fixed connection block is fixed in on the transmission piece, first cylinder is fixed in the fixed connection block, conveying pneumatic clamping jaw sets up on the gas pole of first cylinder, horizontal motion provides the power source about conveying pneumatic clamping jaw is done along the lead screw direction, first cylinder is got the wire rod and is provided the power source for the clamping jaw clamp of conveying pneumatic clamping jaw.

In the above technical solution, the leveling mechanism includes a clamping assembly and a leveling assembly, the clamping assembly is disposed at the front end of the leveling assembly, the clamping assembly includes a second cylinder and a clamping pneumatic clamping jaw, the second cylinder is fixed on the electric cabinet, the clamping pneumatic clamping jaw is disposed at the upper end of the second cylinder, the leveling assembly includes a third cylinder, a slide rail, a slider, an L-shaped sliding plate, a fourth cylinder, a first leveling pressure roller and a second leveling pressure roller, the third cylinder and the slide rail are both fixed on the right side of the wire stripping mechanism, one end of the slider is sleeved on the slide rail, the L-shaped sliding plate is fixed on the other end of the slider, the fourth cylinder and the first leveling pressure roller are both fixed on the L-shaped sliding plate, the third cylinder is located above the first leveling pressure roller, the second leveling pressure roller is disposed on the air lever of the fourth cylinder, a leveling area is formed between the first leveling pressure roller and the second leveling pressure roller, the second cylinder is used for clamping a wire rod for clamping a clamping jaw of a pneumatic clamping jaw, the third cylinder is used for providing a power source for the L-shaped sliding plate to do front-back horizontal linear motion, and the fourth cylinder is used for providing a power source for the second leveling pressing wheel to do pressing-down motion along the vertical direction.

In the above technical solution, the wire stripping mechanism includes a wire stripping support, a fifth cylinder, a slide rail, a slide block, and a wire stripping assembly, the slide rail is disposed on an inner wall of the wire stripping support, one side of the slide block is sleeved on the slide rail, the other side of the slide block is fixed on the wire stripping assembly, the fourth cylinder is disposed at a rear side of the wire stripping support, and a gas rod of the fifth cylinder is connected to the wire stripping assembly, the fifth cylinder provides a power source for the wire stripping assembly to move horizontally back and forth on the slide rail, the wire stripping assembly includes a sixth cylinder, an upper wire stripping seat, a reset assembly and a lower wire stripping seat, the upper wire stripping seat is disposed above the lower wire stripping seat, the reset assembly is disposed between the upper wire stripping seat and the lower wire stripping seat, the reset assembly includes a guide pillar and a reset spring, the sixth cylinder is disposed at an upper end of the upper wire stripping seat, the sixth cylinder provides a power source for the upper wire stripping seat to move downward along a vertical direction on the guide pillar, the upper wire stripping seat is reset through a reset spring.

In the above technical scheme, beat the terminal mechanism and include the terminal charging tray, beat the terminal fixing base, beat the terminal workstation, beat the terminal mould, mould support, seventh cylinder and resetting means, beat on the terminal fixing base is fixed in the electric cabinet, beat the terminal workstation and set up on beating the terminal fixing base, beat the terminal mould and set up on the mould support, the seventh cylinder sets up the gas pole that sets up in the upper end of mould support and seventh cylinder and beat the terminal mould and be connected, resetting means sets up in the left side of beating the terminal mould, the seventh cylinder provides power source for beating the terminal mould and make the push down motion along vertical direction, resetting means resets and provides power source for beating the terminal mould after pushing down.

In the technical scheme, the discharging mechanism comprises a fixed column, an eighth cylinder, a ninth cylinder and a discharging pneumatic clamping jaw, the fixed column is fixed on the left side of the wire stripping support, the eighth cylinder is fixed on the fixed column, the ninth cylinder is arranged at the lower end of a gas rod of the eighth cylinder, the discharging pneumatic clamping jaw is arranged at the lower end of the gas rod of the ninth cylinder, the eighth cylinder provides a power source for the discharging pneumatic clamping jaw to move back and forth along the horizontal direction, and the ninth cylinder provides a power source for the clamping jaw of the discharging pneumatic clamping jaw to clamp the wire.

The beneficial effects of the utility model reside in that: the utility model relates to a rationally, novel structure, collect the conveying, the flattening, the wire stripping, beat the terminal and ejection of compact in an organic whole, will wait to beat the terminal wire rod through adopting transport mechanism and carry to leveling mechanism department flattening, rethread transport mechanism sends to wire stripping mechanism and will wait to beat the head insulating skin peeling off of terminal wire rod, send the wire rod that has skinned to beat terminal mechanism department through transport mechanism and beat the terminal after that, will beat the terminal wire rod through transport mechanism at last and send to the ejection of compact mechanism ejection of compact, degree of automation is high, need not manual operation, accomplish the conveying automatically, the flattening, the wire stripping, beat terminal and ejection of compact manufacturing procedure, degree of automation is high, the operation is smooth, the efficiency of beating the terminal has been improved, the time of beating the terminal has been practiced thrift, therefore, the clothes hanger.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of a partial structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-2.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1-2, an automated terminal machine, comprising: an electric cabinet 1, a human-computer interface 2, a transmission mechanism 3, a leveling mechanism 4, a wire stripping mechanism 5, a terminal crimping mechanism 6 and a discharging mechanism 7, the human-computer interface 2, the leveling mechanism 4, the wire stripping mechanism 5, the discharging mechanism 7 and the terminal crimping mechanism 6 are sequentially arranged at the rear part of the upper end of the electric cabinet 1 from right to left, the conveying mechanism 3 is arranged at the front ends of the leveling mechanism 4, the wire stripping mechanism 5, the discharging mechanism 7 and the terminal crimping mechanism 6, the conveying mechanism 3 is used for conveying the wires of the terminals to be punched to different stations for processing, the leveling mechanism 4 is used for leveling and smoothing the wires of the terminals to be punched to enable the wires to be positioned on the same horizontal plane, the wire stripping mechanism 5 is used for stripping an insulating skin of a terminal wire to be punched, the terminal punching mechanism 6 is used for punching a terminal on the terminal wire to be punched, and the discharging mechanism 7 is used for discharging the terminal wire which is punched.

As a further improvement of the utility model, the conveying mechanism 3 comprises a conveying motor 31, a screw rod 32, a screw rod nut, a linear flange, a transmission block 33, a screw rod fixing seat 34, a fixed connecting block 35, a first air cylinder 36 and a conveying pneumatic clamping jaw 37, two ends of the screw rod 32 are respectively fixed on the screw rod fixing seat 34 and one end of the screw rod is connected with the transmission motor 31, the screw rod nut and the linear flange are both arranged inside the transmission block 33 and sleeved on the screw rod 32, the fixed connecting block 35 is fixed on the transmission block 33, the first cylinder 36 is fixed on the fixed connecting block 35, the conveying pneumatic clamping jaw 37 is arranged on an air rod of the first air cylinder 36, the conveying motor 31 provides a power source for the conveying pneumatic clamping jaw 37 to horizontally move left and right along the direction of the screw rod 32, the first cylinder 36 provides a power source for the gripper jaws of the conveying pneumatic gripper 37 to grip the wire.

In this embodiment, the wire to be processed is gripped by the conveying pneumatic gripper 37, and the conveying pneumatic gripper 37 is driven by the conveying motor 31 to move on the screw rod 32, so as to achieve the function of automatic conveying.

As a further improvement of the present invention, the leveling mechanism 4 comprises a clamping assembly 41 and a leveling assembly 42, the clamping assembly 41 is disposed at the front end of the leveling assembly 42, the clamping assembly 41 comprises a second cylinder and a clamping pneumatic clamping jaw, the second cylinder is fixed on the electric cabinet, the clamping pneumatic clamping jaw is disposed at the upper end of the second cylinder, the leveling assembly 42 comprises a third cylinder, a slide rail, a slider, an L-shaped sliding plate, a fourth cylinder, a first leveling pinch roller and a second leveling pinch roller, the third cylinder and the slide rail are both fixed on the right side of the wire stripping mechanism, one end of the slider is sleeved on the slide rail, the L-shaped sliding plate is fixed on the other end of the slider, the fourth cylinder and the first leveling pinch roller are both fixed on the L-shaped sliding plate and the third cylinder is located above the first leveling pinch roller, the second leveling pinch roller is disposed on the air rod of the fourth cylinder, form the flattening region between first flattening pinch roller and the second flattening pinch roller, the wire rod is got for the clamping jaw clamp of pressing from both sides tight pneumatic clamping jaw to the second cylinder provides the power source, the horizontal linear motion provides the power source around the third cylinder is made for L type slide, the fourth cylinder makes the push down motion along vertical direction for the second flattening pinch roller and provides the power source.

In this embodiment, send conveying mechanism 3 through clamping component 41 and treat the flattening wire rod and receive, drive first flattening pinch roller and second flattening pinch roller backward motion on the slide rail through the third cylinder, drive the cooperation of second flattening pinch roller push down and second flattening pinch roller through the fourth cylinder and step up the wire rod to straighten the flattening with the wire rod, make the end of a thread of treating the flattening wire rod be located same horizontal plane, accomplish the flattening process.

As a further improvement of the present invention, the wire stripping mechanism 5 comprises a wire stripping support 51, a fifth cylinder, a slide rail, a slider and a wire stripping assembly 52, the slide rail is disposed on the inner wall of the wire stripping support, one side of the slider is sleeved on the slide rail, the other side of the slider is fixed on the wire stripping assembly, the fourth cylinder is disposed at the rear side of the wire stripping support 51, and the gas rod of the fifth cylinder is connected to the wire stripping assembly 52, the fifth cylinder provides a power source for the wire stripping assembly 52 to move horizontally back and forth on the slide rail, the wire stripping assembly 52 comprises a sixth cylinder, an upper wire stripping seat, a reset assembly and a lower wire stripping seat, the upper wire stripping seat is disposed above the lower wire stripping seat, the reset assembly is disposed between the upper wire stripping seat and the lower wire stripping seat, the reset assembly comprises a guide pillar and a reset spring, the sixth cylinder is disposed at the upper end of the upper wire stripping seat, the sixth cylinder provides a power source for the upper wire stripping seat to press downwards on the guide post along the vertical direction, and the upper wire stripping seat is reset through a reset spring.

In this embodiment, after the leveling process is completed, the conveying mechanism 3 conveys the leveled wire to the wire stripping mechanism 5, the wire stripping assembly 52 slides back and forth on the slide rail to adjust the position by adopting the structural design of the wire stripping bracket 51, the fifth cylinder, the slide rail, the slide block and the wire stripping assembly 52, the sixth cylinder drives the upper wire stripping seat to press down to be matched with the lower wire stripping seat to tighten the wire for stripping, and the resetting assembly resets the upper wire stripping seat to complete the wire stripping process.

As a further improvement, make terminal mechanism 6 include the terminal charging tray, make terminal fixing base 61, make terminal workstation 62, make terminal mould 63, mould support 64, seventh cylinder 65 and resetting means 66, it is fixed in on the electric cabinet to make the terminal fixing base, it sets up on making the terminal fixing base to make the terminal workstation, it sets up on the mould support to make the terminal mould, the seventh cylinder sets up the gas pole that sets up in the upper end of mould support and seventh cylinder and is connected with making the terminal mould, resetting means sets up in the left side of making the terminal mould, the seventh cylinder makes the pushing down motion along vertical direction for making the terminal mould and provides power source, resetting means resets and provides power source for making terminal mould pushing down the back.

In this embodiment, after the wire stripping process is completed, the conveying mechanism 3 conveys the stripped insulated wire to the terminal crimping mechanism 6, the seventh cylinder 65 controls the terminal crimping mold 63 to press down to cooperate with the terminal workbench 62 to crimp the terminal, the resetting device 66 resets, and the terminal crimping mold 63 can be replaced as required to complete the terminal crimping process.

As a further improvement, the discharging mechanism 7 includes a fixed column 71, an eighth cylinder, a ninth cylinder 72 and a discharging pneumatic clamping jaw 73, the fixed column 71 is fixed on the left side of the wire stripping support 51, the eighth cylinder is fixed on the fixed column 71, the ninth cylinder 72 is arranged at the lower end of the air rod of the eighth cylinder, the discharging pneumatic clamping jaw 73 is arranged at the lower end of the air rod of the ninth cylinder 72, the eighth cylinder provides a power source for the discharging pneumatic clamping jaw 73 to move back and forth along the horizontal direction, and the ninth cylinder 72 clamps the clamping jaw of the discharging pneumatic clamping jaw 73 to provide a power source for the wire rod.

In the present embodiment, after the terminal crimping process is completed, the conveying mechanism 3 conveys the crimped terminal wires to the discharging mechanism 7, the discharging pneumatic clamping jaws 73 clamp the crimped terminal wires through the ninth air cylinder 72, and the crimped terminal wires are discharged through the eighth air cylinder.

The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. An automated terminal machine, comprising: the automatic terminal punching machine comprises an electric cabinet, a human-computer interface, a conveying mechanism, a leveling mechanism, a wire stripping mechanism, a terminal punching mechanism and a discharging mechanism, wherein the human-computer interface, the leveling mechanism, the wire stripping mechanism, the discharging mechanism and the terminal punching mechanism are sequentially arranged at the rear part of the upper end of the electric cabinet from right to left, the conveying mechanism is arranged at the front end of the leveling mechanism, the wire stripping mechanism, the discharging mechanism and the terminal punching mechanism, the conveying mechanism is used for conveying a terminal wire to be punched to different stations for processing, the leveling mechanism is used for leveling and smoothing the terminal wire to be punched to enable the wire to be located on the same horizontal plane, the wire stripping mechanism is used for stripping an insulating skin of the terminal wire to be punched, the terminal punching mechanism is used for punching a terminal on the terminal wire to be punched, and the discharging mechanism is used for discharging the terminal wire to be.

2. The automatic terminal machine according to claim 1, wherein the transmission mechanism includes a transmission motor, a lead screw nut, a linear flange, a transmission block, a lead screw fixing seat, a fixed connection block, a first cylinder and a transmission pneumatic clamping jaw, two ends of the lead screw are respectively fixed on the lead screw fixing seat, one end of the lead screw is connected with the transmission motor, the lead screw nut and the linear flange are both arranged inside the transmission block and sleeved on the lead screw, the fixed connection block is fixed on the transmission block, the first cylinder is fixed on the fixed connection block, the transmission pneumatic clamping jaw is arranged on an air rod of the first cylinder, the transmission motor provides a power source for the transmission pneumatic clamping jaw to do left and right horizontal movement along the direction of the lead screw, and the first cylinder provides a power source for the clamping jaw of the transmission pneumatic clamping jaw to clamp the wire.

3. The automatic terminal machine according to claim 1, wherein the leveling mechanism comprises a clamping assembly and a leveling assembly, the clamping assembly is disposed at a front end of the leveling assembly, the clamping assembly comprises a second cylinder and a clamping pneumatic clamping jaw, the second cylinder is fixed on the electric cabinet, the clamping pneumatic clamping jaw is disposed at an upper end of the second cylinder, the leveling assembly comprises a third cylinder, a slide rail, a slide block, an L-shaped sliding plate, a fourth cylinder, a first leveling pressure roller and a second leveling pressure roller, the third cylinder and the slide rail are both fixed at a right side of the wire stripping mechanism, one end of the slide block is sleeved on the slide rail, the L-shaped sliding plate is fixed at the other end of the slide block, the fourth cylinder and the first leveling pressure roller are both fixed on the L-shaped sliding plate, the third cylinder is located above the first leveling pressure roller, the second leveling pressure roller is disposed on an air rod of the fourth cylinder, form the flattening region between first flattening pinch roller and the second flattening pinch roller, the wire rod is got for the clamping jaw clamp of pressing from both sides tight pneumatic clamping jaw to the second cylinder provides the power source, the horizontal linear motion provides the power source around the third cylinder is made for L type slide, the fourth cylinder makes the push down motion along vertical direction for the second flattening pinch roller and provides the power source.

4. The automatic terminal machine according to claim 3, wherein the wire stripping mechanism comprises a wire stripping support, a fifth cylinder, a slide rail, a slide block and a wire stripping assembly, the slide rail is arranged on the inner wall of the wire stripping support, one side of the slide block is sleeved on the slide rail, the other side of the slide block is fixed on the wire stripping assembly, the fourth cylinder is arranged on the rear side of the wire stripping support, a gas rod of the fifth cylinder is connected with the wire stripping assembly, the fifth cylinder provides a power source for the wire stripping assembly to horizontally move back and forth on the slide rail, the wire stripping assembly comprises a sixth cylinder, an upper wire stripping seat, a reset assembly and a lower wire stripping seat, the upper wire stripping seat is arranged above the lower wire stripping seat, the reset assembly is arranged between the upper wire stripping seat and the lower wire stripping seat, the reset assembly comprises a guide pillar and a reset spring, and the sixth cylinder is arranged at the upper end of the upper wire stripping seat, the sixth cylinder provides a power source for the upper wire stripping seat to press downwards on the guide post along the vertical direction, and the upper wire stripping seat is reset through a reset spring.

5. The automatic terminal crimping machine according to claim 1, wherein the terminal crimping mechanism comprises a terminal tray, a terminal crimping fixing seat, a terminal crimping workbench, a terminal crimping mold, a mold support, a seventh cylinder and a reset device, the terminal crimping fixing seat is fixed on the electric cabinet, the terminal crimping workbench is arranged on the terminal crimping fixing seat, the terminal crimping mold is arranged on the mold support, the seventh cylinder is arranged at the upper end of the mold support, an air rod of the seventh cylinder is connected with the terminal crimping mold, the reset device is arranged on the left side of the terminal crimping mold, the seventh cylinder provides a power source for downward pressing movement of the terminal crimping mold along the vertical direction, and the reset device provides a power source for resetting of the terminal crimping mold after downward pressing.

6. The automatic terminal machine according to claim 4, wherein the discharging mechanism comprises a fixed column, an eighth cylinder, a ninth cylinder and a discharging pneumatic clamping jaw, the fixed column is fixed on the left side of the wire stripping support, the eighth cylinder is fixed on the fixed column, the ninth cylinder is arranged at the lower end of a gas rod of the eighth cylinder, the discharging pneumatic clamping jaw is arranged at the lower end of the gas rod of the ninth cylinder, the eighth cylinder provides a power source for the discharging pneumatic clamping jaw to move back and forth along the horizontal direction, and the ninth cylinder provides a power source for the clamping jaw of the discharging pneumatic clamping jaw to clamp the wire.