CN201189594Y

CN201189594Y - Cutting knife structure for ultrasonicwelding unit

Info

Publication number: CN201189594Y
Application number: CNU2008200925303U
Authority: CN
Inventors: 章舜如
Original assignee: SHENZHEN CHUANGWEIXING AUTOMATIC EQUIPMENT Co Ltd
Current assignee: SHENZHEN CHUANGWEIXING AUTOMATIC EQUIPMENT Co Ltd
Priority date: 2008-03-07
Filing date: 2008-03-07
Publication date: 2009-02-04
Anticipated expiration: 2018-03-07

Abstract

The utility model relates to a cutter structure for an ultrasonic welding device, which comprises a supporting arm which is fixed, a first guide rail arranged on the supporting arm, a cutter holder arranged on the first guide rail, a cutter arranged at the lower end of the cutter holder, and a power output part which is fixed and pushes the cutter holder to move, wherein the cutting movement direction of the cutter and the power output direction of the power output part are basically positioned on the same line; and the guide direction of the first guide rail and the cutting movement direction of the cutter are basically parallel or overlapped. The force output by the power output part is directly transferred to the cutter by setting power output direction of the power output part and the cutting movement direction of the cutter on the same line, thereby avoiding the loss of the energy and forming larger cutting force so as to have the ability of cutting thicker leads. Therefore, the impact torsion can not be produced during force transferring, which avoids the energy consumption and increases the stability of wire cutting process.

Description

The cutter structure that is used for ultrasonic brazing unit

Technical field

The utility model relates to welder, more particularly, relates to a kind of cutter structure that is used for ultrasonic brazing unit.

Background technology

In the production process of semiconductor devices, the pin that need from chip, go between, just the two ends with bonding wire are welded on chip and the pin.At present, the bonding wire that adopts is gold thread or aluminum steel usually, adopts the ultrasonic bonding mode to weld.Ultrasonic wave (being generally 40-140KHz) from supersonic generator produces dither through transducer, be sent to chopper by the luffing bar, when chopper contacts with welded part with bonding wire, under the effect of pressure and vibration, metal surface to be welded phase mutual friction, oxide-film is destroyed, and generation plastic deformation, cause two pure metal surfaces closely to contact, reach the combination of atomic distance, form firm mechanical connection.

At present, the cut-out processing to the bonding wire after the welding has two kinds of processing modes.First kind is directly to clamp bonding wire by wire clamp, and bonding wire is pulled apart.This mode is only applicable to thinner bonding wire, then can't pull apart for thicker bonding wire; And need the workman of certain operative skill to operate, otherwise can influence quality of welding spot; And operating efficiency is low.

Second kind is to adopt cutting knife 1 mechanism to cut off lead-in wire.As shown in Figure 2, be the version of existing cutting knife 1 mechanism, comprise cutting knife 1, cutoff knife rack 2, vertical guide rail 3, vertical guide rail support 4, support arm 5, lever 6, electromagnet 7 etc.Electromagnet 7 is fixedly mounted on the hanging deck 8 of welder, as the power source of cutting knife 1 by support.Support arm 5 is fixedly mounted on the hanging deck 8, and is provided with horizontal guide rail 9 in the lower end of support arm 5, and vertical guide rail support 4 is done horizontal reciprocating movement under the guiding of this horizontal guide rail 9.The front end of vertical guide rail support 4 is equipped with vertical guide rail 3, and cutoff knife rack 2 is installed on the vertical guide rail 3 by sliding bearing, and does the reciprocating motion of vertical direction under the guiding of vertical guide rail 3.Cutting knife 1 is installed in the lower end of cutoff knife rack 2, and does the reciprocating motion of vertical direction with cutoff knife rack 2.One end of lever 6 contacts with the output of electromagnet 7, and the other end contacts with the top of cutoff knife rack 2, and fulcrum is arranged on the support arm 5.When needs cutting knife 1 cuts off lead-in wire, electromagnet 7 energisings, adhesive unshakable in one's determination, an end that promotes lever 6 moves upward, and at this moment, the other end of lever 6 moves downward, promote cutoff knife rack 2 and move downward, move downward, cut off bonding wire thereby drive cutting knife 1 along vertical guide rail 3.Further, when finishing rupturing operation, give electromagnet 7 outages, make lever 6 drive cutoff knife rack 2 by spring and reset.The setting of horizontal guide rail 9 then is for the ease of adjusting the horizontal front and back position of cutting knife 1, with the welding position of alignment pieces.

There is following defective at least in cutting knife 1 mechanism of this structure: the power that electromagnet 7 produces passes to lever 6, making lever 6 produce rotatablely moves, by rotatablely moving of lever 6 power is passed to cutoff knife rack 2 again, cutoff knife rack 2 produces under the guiding of vertical guide rail 3 and sliding bearing and moves both vertically, do vertical up-or-down movement and drive cutting knife 1, wherein the transmission of power has been passed through a plurality of parts (as lever 6, sliding bearing etc.), because contact is not tight between the part, gapped, thereby can cause the bump of part to be subjected to twist distortion, bring the loss of energy, make and cut off strength decline, simultaneously because gapped between the part, distortion is arranged, make the cutting knife blade crooked, can not guarantee well that the welded article body plane is parallel, even the cutting knife plane can not switch at the end fully.Therefore be difficult to cut off thicker lead-in wire.

The utility model content

The technical problems to be solved in the utility model is, cuts off the defective that strength is lost at the above-mentioned cutter mechanism existence of prior art, and a kind of strength cutter structure loss, that be used for ultrasonic brazing unit of avoiding cutting off is provided.

The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of cutter structure that is used for ultrasonic brazing unit, comprise hard-wired support arm, be installed in first guide rail on the described support arm, be installed in the power output that the cutoff knife rack on described first guide rail, the cutting knife that is installed in described cutoff knife rack lower end and fixed installation promote described cutoff knife rack motion; The cut-out direction of motion of described cutting knife and the power outbound course of described power output are located along the same line substantially; And the guide direction of described first guide rail is parallel or overlapping with the cut-out direction of motion of described cutting knife.

In cutter structure of the present utility model, described first guide rail is a vertical guide rail; The cut-out direction of motion of described cutting knife and the power outbound course of power output are vertical direction.

In cutter structure of the present utility model, described power output is an electromagnet, and described electromagnet comprises the motion iron core that leans at described cutoff knife rack top and promote described cutoff knife rack motion.

In cutter structure of the present utility model, described cutoff knife rack is that " [" shape has slot to make way.

In cutter structure of the present utility model, described cutter structure also comprises the horizontal adjusting mechanism that is arranged between the described support arm and first guide rail.

In cutter structure of the present utility model, described horizontal adjusting mechanism comprises the horizontal guide rail that is installed in described support arm lower end, be installed in the rail brackets on the described horizontal guide rail and be located on the described rail brackets and roof pressure at the adjustment screw rod of the side of described support arm.

In cutter structure of the present utility model, described power output and the contacted position of described cutoff knife rack are provided with rolling bearing.

In cutter structure of the present utility model, offer the through hole of a plurality of its weight of reduction on the described cutoff knife rack.

In cutter structure of the present utility model, be provided with between described cutoff knife rack and described first guide rail and promote the spring that described cutoff knife rack resets.

In cutter structure of the present utility model, described cutter structure also comprises limit adjusting mechanism, and this limit adjusting mechanism comprises the fine setting screw rod be located on the described hanging deck, be arranged at spring between described hanging deck bottom surface and the described cutoff knife rack top, fixedly be located at the cutoff knife rack limited block of described cutoff knife rack one side and be fixed on described rail brackets front end and the described cutoff knife rack limited block lower position block that cooperates of block mutually; The end of described fine setting screw rod contacts in the top of described cutoff knife rack.

Implement cutter structure of the present utility model, has following beneficial effect: be arranged on the same straight line by the power outbound course of the part that outputs power and the cut-out direction of motion of cutting knife, thereby the power of power output output directly is delivered on the cutting knife, avoided cut-out power by a plurality of part transmission consumed energy, reduce cut-out power, thereby kept bigger cut-out power, and since power be directly be added in cut down on the frame and with the cutting knife center point-blank, so cutting knife can be not crooked, thereby can cut off thicker lead-in wire.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the structural representation of an embodiment of the utility model cutter structure;

Fig. 2 is the structural representation of the cutter structure of prior art.

The specific embodiment

As shown in Figure 1, be an embodiment of cutter structure of the present utility model, it can be applicable on the ultrasonic brazing unit.This cutter structure comprises support arm 11, first guide rail 12, cutoff knife rack 13, cutting knife 14 and power output.In the present embodiment, further be provided with horizontal adjusting mechanism, this horizontal adjusting mechanism comprises horizontal guide rail 15, rail brackets 16 and adjusts screw rod 17 etc., is used to adjust the horizontal level of cutting knife 14, to adapt to different welded part status requirements.

As shown in the figure, this support arm 11 is fixedly mounted on hanging deck 18 belows of ultrasonic brazing unit as support member.The lower end installing horizontal guide rail 15 of this support arm 11, rail brackets 16 is installed on the horizontal guide rail 15 by sliding bearing, thus rail brackets 16 can move horizontally.Be appreciated that forming the horizontal slip pair between rail brackets 16 and the support arm 11 gets final product, its version can be adjusted as required.

Further, on the front end face of rail brackets 16, offer screwed hole, in this screwed hole, screw in and adjust screw rod 17, the front end of this adjustment screw rod 17 leans on the sidewall of support arm 11, by screwing or unclamping and adjust screw rod 17, drive rail brackets 16 and on horizontal guide rail 15, do moving of horizontal direction, thereby adjust the horizontal front and back position of cutoff knife rack 13.

First guide rail 12 is a vertical guide rail, corresponding, the cut-out direction of motion of cutting knife 14 and the power outbound course of power output are vertical direction also, make the guide direction of the guide rail 12 of winning parallel and overlapping with the cut-out direction of motion of cutting knife 14.This vertical guide rail is arranged on the front end of rail brackets 16, and cutoff knife rack 13 is installed on the vertical guide rail by sliding bearing, thereby cutoff knife rack 13 is done the motion of vertical direction under the guiding of vertical guide rail.Understandable, form vertical sliding pair between rail brackets 16 and the cutoff knife rack 13 and get final product, its version can be adjusted as required.

Cutting knife 14 is installed in the bottom of cutoff knife rack 13, cutting knife 14 under the drive of cutoff knife rack 13 equally vertical direction move up and down; Simultaneously, the top of cutoff knife rack 13 contacts with the clutch end of power output, promotes whole cutoff knife rack 13 motions by the power output.In the present embodiment, the power output is an electromagnet 19, directly is fixedly mounted on hanging deck 18 tops of welder; Understandable, the power output also can add the structure of the power that various exportable promotion cutoff knife racks 13 such as cam structure move downward for clockwise and anticlockwise motor, motor.This electromagnet 19 is provided with and passes the motion iron core 191 of hanging deck 18 roof pressures at cutoff knife rack 13 tops, and the switching electricity operation by to electromagnet 19 comes the reciprocating motion of controlled motion iron core 191, thereby makes pumping of cutoff knife rack 13.As shown in the figure, the direction of motion of the motion iron core 191 of electromagnet 19 and the cut-out direction of motion of cutting knife 14 are on the same straight line substantially, thereby the power of electromagnet 19 outputs directly is delivered on the cutting knife 14, avoided a plurality of parts to transmit the loss of power, keep bigger cut-out power, thereby can cut off thicker lead-in wire.

Further, on vertical guide rail, be provided with the spring (Figure 22) that pulling cutoff knife rack 13 resets.When cutoff knife rack 13 moved downward the cut-out lead-in wire under the promotion of power output, this spring stretched; And after cut-out was finished, the power output stopped the application of force, and spring is replied, and resetted and drive cutoff knife rack 13.

As shown in the figure, the shape of cutoff knife rack 13 can also make that " [" shape forms slot to make way 131 in a side, thereby is convenient to luffing bar, the installation of wire clamp, the work of welder.Further, on cutoff knife rack 13, also offer a plurality of holes 132, to alleviate the weight of cutoff knife rack 13.

Further, can also be at the end of the motion iron core 191 of electromagnet 19, be provided with rolling bearing (figure does not show) with the contacted position of cutoff knife rack 13 end faces, thereby follow rail brackets 16 when doing horizontal movement at cutoff knife rack 13, reduce the friction with cutoff knife rack 13 end faces, reduce wear.

Further, this cutter structure can also be provided with limit adjusting mechanism 21, and this limit adjusting mechanism 21 comprises fine setting screw rod, spring, cutoff knife rack limited block and lower position block.Hanging deck 18 is provided with screw, screw in for the fine setting screw rod, and the end of fine setting screw rod contacts with the top of cutoff knife rack 13.When needs are regulated the upward position of cutoff knife rack 13, only need tighten or unclamp cutoff knife rack 13, can adjust the upward position of cutoff knife rack 13.Spring 22 is arranged between the top of the bottom surface of hanging deck 18 and cutoff knife rack 13, and pretightning force is provided, to guarantee the maximum upward position of cutoff knife rack 13.By the up extreme position of fine setting screw rod and spring restriction cutoff knife rack 13, it is long to have avoided the rising of cutoff knife rack 13 to form, and improves the tangent line stationarity.

The cutoff knife rack limited block is arranged on a side of cutoff knife rack 13, and lower position block is fixedly installed on the front end of rail brackets 16, and by the block cooperation of cutoff knife rack limited block and lower position block, the descending extreme position of restriction cutoff knife rack 13 is avoided the damage of 14 pairs of workpiece of cutting knife.

Claims

1, a kind of cutter structure that is used for ultrasonic brazing unit comprises hard-wired support arm, is installed in first guide rail on the described support arm, is installed in the power output that the cutoff knife rack on described first guide rail, the cutting knife that is installed in described cutoff knife rack lower end and fixed installation promote described cutoff knife rack motion; It is characterized in that the cut-out direction of motion of described cutting knife and the power outbound course of described power output are located along the same line substantially; And the guide direction of described first guide rail is parallel or overlapping with the cut-out direction of motion of described cutting knife.

2, cutter structure according to claim 1 is characterized in that, described first guide rail is a vertical guide rail; The cut-out direction of motion of described cutting knife and the power outbound course of power output are vertical direction.

3, cutter structure according to claim 2 is characterized in that, described power output is an electromagnet, and described electromagnet comprises the motion iron core that leans at described cutoff knife rack top and promote described cutoff knife rack motion.

According to claim 1,2 or 3 described cutter structures, it is characterized in that 4, described cutoff knife rack is that " [" shape has slot to make way.

5, cutter structure according to claim 4 is characterized in that, described cutter structure also comprises the horizontal adjusting mechanism that is arranged between the described support arm and first guide rail.

6, cutter structure according to claim 5, it is characterized in that, described horizontal adjusting mechanism comprises the horizontal guide rail that is installed in described support arm lower end, be installed in the rail brackets on the described horizontal guide rail and be located on the described rail brackets and roof pressure at the adjustment screw rod of the side of described support arm.

7, cutter structure according to claim 6 is characterized in that, described power output and the contacted position of described cutoff knife rack are provided with rolling bearing.

8, cutter structure according to claim 4 is characterized in that, offers the through hole of a plurality of its weight of reduction on the described cutoff knife rack.

9, cutter structure according to claim 1 is characterized in that, is provided with between described cutoff knife rack and described first guide rail to promote the spring that described cutoff knife rack resets.

10, cutter structure according to claim 6, it is characterized in that, described cutter structure also comprises limit adjusting mechanism, and this limit adjusting mechanism comprises the fine setting screw rod be located on the described hanging deck, be arranged at spring between described hanging deck bottom surface and the described cutoff knife rack top, fixedly be located at the cutoff knife rack limited block of described cutoff knife rack one side and be fixed on described rail brackets front end and the described cutoff knife rack limited block lower position block that cooperates of block mutually; The end of described fine setting screw rod contacts in the top of described cutoff knife rack.