阅读说明：本技术 一种伸缩轴定位压紧式器件引脚双边裁剪装置 (Device is tailor to telescopic shaft location pressing mode device pin both sides ) 是由 李宇轩 陈梁 贾伏龙 陆乐 崔洪波 于 2019-09-26 设计创作，主要内容包括：本发明涉及一种伸缩轴定位压紧式器件引脚双边裁剪装置,包括两个对称分布的伸缩轴、承载器件的限位基体、压块以及两个支撑翼块；伸缩轴固定在限位基体上,压轴朝向限位基体中的槽,压块位于伸缩轴和限位基体槽之间,用于压紧待剪脚的器件,两个支撑翼块分别固定在限位基体前后端。优点：装置制造成本低,操作简便,同时选择性地压紧器件部分引脚,保证裁剪时元器件引脚根部不受扭矩,可实现一次裁剪多个器件,适合陶瓷封装类器件。通过弹性伸缩轴实现元器件的快速装卸。槽限制器件引脚裁剪的长度,同时是支撑与夹紧引脚、保护引脚脆弱部位的基础。基体两边翼块用来保证整体稳定性,翼块的位置可以更换,以此顺应左右手或者裁剪工具的裁剪操作。(The invention relates to a telescopic shaft positioning and pressing type device pin bilateral cutting device which comprises two telescopic shafts, a limiting base body for bearing a device, a pressing block and two supporting wing blocks, wherein the two telescopic shafts are symmetrically distributed; the telescopic shaft is fixed on the limiting base body, the pressing shaft faces to a groove in the limiting base body, the pressing block is located between the telescopic shaft and the limiting base body groove and used for pressing a device to be subjected to pin shearing, and the two supporting wing blocks are fixed at the front end and the rear end of the limiting base body respectively. The advantages are that: the device is low in manufacturing cost and simple and convenient to operate, meanwhile, part of pins of the device are selectively compressed, the root of the pins of the component is not subjected to torque when the pins are cut, multiple devices can be cut at one time, and the device is suitable for ceramic packaging devices. The rapid assembly and disassembly of components are realized through the elastic telescopic shaft. The grooves limit the length of the pins of the device during cutting, and are the basis for supporting and clamping the pins and protecting the fragile parts of the pins. The wing blocks on the two sides of the base body are used for ensuring the overall stability, and the positions of the wing blocks can be changed so as to conform to the cutting operation of left and right hands or cutting tools.)

1. The device for cutting the pin on the two sides of the telescopic shaft positioning and pressing type device is characterized by comprising two telescopic shafts (1-2), a limiting base body (1-1), a limiting pressing block (1-3) and two supporting wing blocks (1-4), wherein a through groove is formed in the middle of the limiting base body (1-1), bosses are arranged at two ends of the through groove and extend inwards to the upper side of the through groove to support the two telescopic shafts (1-2), threaded holes are formed in the inward extending parts of the bosses, the size of each threaded hole is matched with the thread on the telescopic shaft body, and the telescopic shafts (1-2) are fixed on the limiting base body (1-1) through threads; the limiting pressing block (1-3) is positioned between the two telescopic shafts (1-2) and the limiting base body (1-1) through groove and used for pressing a device to be subjected to pin shearing, positioning grooves are formed in the positions, corresponding to the telescopic shafts (1-2), of the two ends of the limiting pressing block (1-3), and the two supporting wing blocks (1-4) are respectively fixed at the front end and the rear end of the limiting base body (1-1) and are connected through fixing screws (1-6).

2. The bilateral pin cutting device of the telescopic shaft positioning and pressing type device according to claim 1, wherein the bottom of the limiting base body (1-1) is provided with a weight-reducing through hole.

3. The bilateral pin cutting device of the telescopic shaft positioning and pressing type device as claimed in claim 1, wherein the telescopic shaft (1-2) is detachably connected with the limiting base body (1-1) through a thread.

4. The bilateral pin cutting device of the telescopic shaft positioning and pressing type device according to claim 1, wherein the thickness of the limiting base body (1-1) is the total length of the pin in the direction of the pin after the pin is cut.

5. The bilateral pin cutting device of the telescopic shaft positioning and pressing type device according to claim 1, wherein the limiting base body (1-1) and the limiting pressing block (1-3) are made of nonmagnetic or weakly magnetic stainless steel.

6. The bilateral pin cutting device of the telescopic shaft positioning and pressing type device as claimed in claim 1, wherein the bottom of the through groove or the bottom of the limiting pressing block (1-3) is adhered with antistatic foam; an anti-static adhesive tape is stuck on the notch and the inner side of the through groove, and the anti-static adhesive tape is stuck on the limiting pressing block (1-3).

7. The bilateral pin cutting device for the telescopic shaft positioning and pressing type devices according to claim 1 is characterized in that the telescopic shaft (1-2) comprises a shaft, a spring and a shaft sleeve, the spring is sleeved on the shaft, the top of the shaft is a T-shaped pull rod, a guide groove and a groove are formed in the end of the shaft sleeve, the T-shaped pull rod is pulled to the top along the guide groove and is placed in the groove after being rotated.

8. The bilateral pin cutting device of the telescopic shaft positioning and pressing type device according to claim 1, wherein two bosses matched with the through grooves of the limiting base body are arranged at two ends of the limiting pressing block (1-3).

9. The bilateral pin cutting device of the telescopic shaft positioning and pressing type device as claimed in claim 1, wherein the supporting wing blocks (1-4) are positioned at two ends of the limiting base body (1-1), one on the left and the other on the right.

10. The working method of the bilateral pin cutting device for the telescopic shaft positioning and pressing type devices as claimed in claim 1, is characterized by comprising the following steps:

1) pulling up and fixing a pull rod of a telescopic shaft, upwards retracting a telescopic shaft pressing shaft into a telescopic shaft body with threads, placing a plurality of device bodies to be cut downwards into a through groove on a limiting base body (1-1), and matching the size of the body with the width of the groove;

2) under the state that the telescopic shaft is kept pulled up, the limiting pressing block is placed below the telescopic shaft, the notch is upward, the pressing block is inserted into the groove, the pressing block is integrally put down, the boss of the pressing block is matched with the width of the groove, and two side faces of the pressing block are flush with two side faces of the limiting base body respectively;

3) pulling up a telescopic shaft pull rod, loosening the handle, dropping the pull rod, pressing a pressing shaft in a positioning groove of a pressing block, pressing a pin of a device, wherein the pin extending out of the pressing block and a base body is a part to be cut;

4) and tightly attaching the cutter face of the guillotine to the side faces of the pressing block and the substrate, pressing down the guillotine to cut off the pins of the device, rotating the guillotine by 180 degrees, then finishing cutting off the pins on the other side, finally pulling up the telescopic shaft, taking down the pressing block and the device, and finishing the cutting off of the pins.

Technical Field

The invention relates to a telescopic shaft positioning and pressing type device pin bilateral cutting device, and belongs to the technical field of integrated circuit pin cutting.

Background

During the manufacturing and packaging processes of integrated circuits, wire frames are often used to connect the pins of multiple integrated circuits. After the mass production of the integrated circuits, the pins or wire frames are usually formed and cut by a rib cutter, and each integrated circuit block is separated into standard and consistent specifications and then shipped. The rib cutting machine adopts air pressure or hydraulic pressure as power, is matched with blanking dies with different manufacturing costs, and is provided with an automatic feeding device so as to adapt to mass production. The mass production tendon cutting machine can cut tens of millions of tendons one year.

For trial or small-scale production, due to the limited number of products, the cutting requirement of a year may be only hundreds or thousands, which is not suitable for mass production of the bar cutter. In addition, products produced in small quantities are often not shaped, the package shape or the pin length is slightly adjusted, and a new blanking die is needed, so that the cost is greatly increased. At present, aiming at the requirements of the cutting feet, manual hand-held tools (cutting nippers, guillotines and the like) are often adopted for directly cutting; or a spacer with a certain thickness is simply arranged between the device body and the knife edge by a slight adjustment, and the spacer is used as the limitation of the length of the pin. Although flexible, this conventional foot-cutting approach has three major problems: firstly, due to the fact that accurate positioning is not achieved, the length of the pin is poor in consistency after cutting is completed; secondly, the device can only be cut singly, and the work efficiency is lower. And thirdly, a plurality of products with high requirements are packaged by ceramic metal, the root part of the pin is fragile and is particularly sensitive to torque, and the joint of the root part of the pin and the ceramic is subjected to the torque during cutting, so that cracks are easy to initiate and expand, and devices are damaged.

Disclosure of Invention

The invention provides a telescopic shaft positioning and pressing type device pin bilateral cutting device, and aims to solve the problems of poor consistency, low efficiency and potential reliability hazard in conventional pin cutting operation. The device is suitable for various packaging forms such as the most common double-sided lead flat packaging, double-sided wing lead sheet type packaging, small-outline packaging and the like.

The technical solution of the invention is as follows: the telescopic shaft positioning and pressing type device pin bilateral cutting device structurally comprises two telescopic shafts 1-2, a limiting base body 1-1, a limiting pressing block 1-3 and two supporting wing blocks 1-4, wherein a through groove is formed in the middle of the limiting base body 1-1, bosses are arranged at two ends of the through groove and extend inwards to the upper side of the through groove, the two telescopic shafts 1-2 are supported, threaded holes are formed in the inward extending portions of the bosses, the size of each threaded hole is matched with threads on the telescopic shaft body, and the telescopic shafts 1-2 are detachably and symmetrically connected with the limiting base body 1-1 through threads; the limiting pressing block 1-3 is positioned between the two telescopic shafts 1-2 and the through groove of the limiting base body 1-1 and used for pressing a device to be subjected to pin shearing, positioning grooves are formed in the positions, corresponding to the telescopic shafts 1-2, of the two ends of the limiting pressing block, and the two supporting wing blocks 1-4 are fixed to the front end and the rear end of the limiting base body 1-1 respectively and are fixed through screws 1-6.

The bottom of the limiting base body 1-1 is provided with a weight-reducing through hole.

The thickness of the limiting base body 1-1 is the total length of the pin direction of the device after the pin is cut.

The limiting base body 1-1 and the limiting pressing block 1-3 are made of non-magnetic or weak-magnetic stainless steel.

Antistatic foam is adhered to the bottom of the through groove or the bottom of the limiting pressing block 1-3; an anti-static adhesive tape is adhered to the notch and the inner side of the through groove, and the anti-static adhesive tape is adhered to the limiting pressing block 1-3.

The telescopic shaft 1-2 comprises a shaft, a spring and a shaft sleeve, the spring is sleeved on the shaft, the top of the shaft is a T-shaped pull rod, a guide groove and a groove are formed in the end of the shaft sleeve, the T-shaped pull rod is pulled to the top along the guide groove, and the T-shaped pull rod is arranged in the groove after rotating.

Two bosses matched with the through grooves of the limiting base body are arranged at two ends of the limiting pressing block 1-3.

The supporting wing blocks 1-4 are positioned at two ends of the limiting base body 1-1, one is positioned on the left and the other is positioned on the right.

The working method is characterized by comprising the following steps:

1) pulling up and fixing a pull rod of a telescopic shaft, retracting a telescopic shaft pressing shaft upwards into a telescopic shaft body with threads, placing a plurality of device bodies to be cut downwards into a through groove on a limiting base body 1-1, and matching the size of the body with the width of the groove;

2) under the state that the telescopic shaft is kept pulled up, the limiting pressing block is placed below the telescopic shaft, the notch is upward, the pressing block is inserted into the groove, the pressing block is integrally put down, the boss of the pressing block is matched with the width of the groove, and two side faces of the pressing block are flush with two side faces of the limiting base body respectively;

3) pulling up a telescopic shaft pull rod, loosening the handle, dropping the pull rod, pressing a pressing shaft in a positioning groove of a pressing block, pressing a pin of a device, wherein the pin extending out of the pressing block and a base body is a part to be cut;

4) and tightly attaching the cutter face of the guillotine to the side faces of the pressing block and the substrate, pressing down the guillotine to cut off the pins of the device, rotating the guillotine by 180 degrees, then finishing cutting off the pins on the other side, finally pulling up the telescopic shaft, taking down the pressing block and the device, and finishing the cutting off of the pins.

The invention has the beneficial effects that:

1) the requirement of bilateral cutting of small-batch pins or wire frames of surface-mounted components is effectively met, the components are rapidly assembled and disassembled by switching of the two states of stretching and shrinking of the elastic telescopic shaft, the cutting length of the pins of the components is controllable, meanwhile, the fragile parts of the pins are protected, and the purpose of cutting a plurality of components once (once) can be achieved.

2) The matched telescopic shaft has good linearity and centrality, and can realize high-precision positioning. The spring in the telescopic shaft determines the force for pressing the pin, and can be customized according to the actual condition of the device.

3) The whole device is low in manufacturing cost and simple and convenient to operate, part of pins (wire frames) of the device are selectively compressed, the root of the pins of the component is not subjected to torque when the pin is cut, and the device is suitable for various common packaging forms such as double-sided lead flat packaging, double-sided wing-shaped lead sheet packaging, small-outline packaging and the like.

4) The wing blocks on the two sides of the base body are used for ensuring the overall stability, and the positions of the wing blocks can be changed so as to conform to the cutting operation of left and right hands or cutting tools.

Drawings

Fig. 1 is a schematic structural diagram of a bilateral pin cutting device for a telescopic shaft positioning and pressing type device.

Fig. 2 is a schematic view of the placement of the device.

FIG. 3 is a schematic view of a device placed in a tank and then a compact placed thereon.

Fig. 4 is a schematic view of the pin being cut with a guillotine after compression of the telescoping shaft.

In the figure, 1-1 is a limiting base body, 1-2 is a telescopic shaft, 1-3 is a limiting pressing block, 1-4 is a supporting wing block, 1-5 is a device of a pin to be cut, 1-6 is a fixing screw, 2-1 is a telescopic shaft body, 2-2 is a telescopic shaft pull rod, 2-3 is a device, 2-4 is a notch, 2-6 is a pressing block boss, 4-1 is a telescopic shaft pull rod, and 4-2 is a guillotine cutting edge.

Detailed Description

The limiting base body is the foundation of the whole device. A groove is arranged in the middle of the limiting base body, and a device pin and a pressing block are placed above the groove. The two ends of the groove are provided with bosses for supporting the telescopic shaft by the limiting base body, and the bosses extend inwards and extend to the upper part of the groove. The extended part is provided with a threaded hole for fixing the telescopic shaft, and the size of the threaded hole is matched with the thread on the telescopic shaft body. The side surface of the limiting base body is provided with four weight-reducing through holes, and the positions of the side surface, which are close to the two ends of the base body, are respectively provided with two through holes for fixing and supporting the wing blocks. The whole limiting base body is made of nonmagnetic or weakly magnetic stainless steel, and the purpose is to prevent the magnetic pin stub from being adsorbed on the base body while ensuring the strength. The thickness of the whole limiting base body is the total length of the pin direction of the device after the pin is cut, the length of the limiting base body is determined by the number of the devices which are cut at one time and the supporting requirement of the telescopic shaft, and the height of the limiting base body is determined by the operation practice.

The through groove in the center of the limiting base body is used for placing the device, the device body is placed in the groove, and the width of the groove is close to that of the device body, so that the device can be smoothly placed in the groove and cannot be loosened too much. The device pins are lapped on notches on two sides, and the pins or wire frames extending out of the notches are parts to be cut. The bottom of the groove is adhered with a layer of antistatic foam which slightly supports the device body but does not position the device body. If necessary, an antistatic tape may be attached to the notch and the inner side. The groove of the limiting base body can assist in positioning the pressing block.

From the machining process, after blanking according to the set thickness, the limiting base body only needs to be subjected to wire electrical discharge machining to cut the shape in one step, then two threaded holes are symmetrically drilled in the upper surface, 4 through holes and 4 lightening holes are drilled in the side surface, and finally a groove for placing a device is formed through wire electrical discharge machining in the last step. The total of two times of wire cutting, ten holes are drilled, and two threads are tapped by a screw tap, so that the operation is simple and the cost is low.

The telescopic shaft is a common positioning tool in the industry, the spring is contained in the telescopic shaft, and the telescopic shaft is produced in batches by manufacturers and is low in cost. Compared with positioning and clamping tools such as a thumb screw or a quick clamp, the telescopic shaft has simple operation and intensive structure. One end of a telescopic shaft matched with the novel telescopic device is a T-shaped pull rod, two fingers support the T-shaped pull rod to pull up and down, and a pressing shaft can move up and down along with the T-shaped pull rod. The end of the pressing shaft is provided with a chamfer angle for guiding. The T-shaped pull rod is pulled up to the top from the bottommost clamping groove, rotated by 90 degrees and put down, two sides of the T-shaped pull rod are placed in the notch of the telescopic shaft, the T-shaped pull rod is in a compression state of the spring, the shaft contracts, and devices and pressing blocks can be assembled and disassembled at the moment. The T-shaped pull rod is lifted, rotated by 90 degrees and then put down, the telescopic shaft quickly falls down under the action of the spring, the positioning and the pressing of the pressing block are realized, and at the moment, pins of devices can be cut. The telescopic shaft matched with the positioning device has good straightness and centrality, and can realize positioning with higher precision. The spring in the telescopic shaft determines the force for pressing the pin, and can be customized according to the actual condition of the device.

The pressing block is an intermediate body of the telescopic shaft pressing device and is also made of nonmagnetic or weakly magnetic stainless steel. The width of the pressing block is consistent with that of the limiting substrate groove, the length of the pressing block is determined according to the number of the devices placed in the groove and is generally slightly longer than the length occupied by all the devices, and the thickness of the pressing block is random and is generally slightly smaller than the width of the pressing block. In order to bear the downward pressing and positioning of the telescopic shaft, a blind hole or a groove is formed in the corresponding position of the pressing block, and the pressing block is automatically righted when the pressing shaft of the telescopic shaft is pressed down to the blind hole or the groove. The bottom surface of the pressing block presses on the pin of the device. The bottom surface of the pressing block can be pasted with an anti-static adhesive tape as required, and can also be grooved according to the appearance characteristics of the device, and the groove of the pressing block can be pasted with a layer of anti-static foam to play a role in pressing the body without positioning. Two bosses matched with the limiting base body grooves can be added at two ends of the pressing block, so that the pressing block is not easy to fall off in the loading and unloading process.

The supporting wing blocks are auxiliary components for keeping the stability of the device and are fixed with the limiting base body through screws. The size of the supporting wing block is relatively free, the supporting wing block is generally a cuboid, and a screw hole matched with the through hole of the limiting base body is drilled on one surface of the supporting wing block. The support wings are typically located at both ends of the device, one on the left and one on the right. No matter the cutting nippers or the guillotine, after the pins on one side are cut, the device can cut the pins on the other side after rotating 180 degrees. The position of the supporting wing block can be adjusted according to the operation habit of an operator or the characteristics of a cutting tool.

The technical scheme of the invention is further explained by combining the attached drawings

As shown in the attached figure 1, the telescopic shaft positioning and pressing type device pin bilateral cutting device comprises two symmetrically distributed telescopic shafts, a limiting substrate for bearing a device, a pressing block and two supporting wing blocks; the telescopic shaft is fixed on the limiting base body, the pressing shaft faces to a groove in the limiting base body, the pressing block is located between the telescopic shaft and the limiting base body groove and used for pressing a device to be subjected to pin shearing, and the two supporting wing blocks are fixed at the front end and the rear end of the limiting base body respectively.

The device adopts the telescopic shaft to position and quickly assemble and disassemble the pin device to be cut. The pressing block is aligned, positioned and compressed by utilizing the higher straightness and the central degree of the telescopic shaft, the device is compressed in the groove of the pressing block and the base body, and the device supporting, the pin clamping and the pin length limiting are integrated.

The cutting machine can adapt to the cutting of the hand-held cutting nippers of the right-handed person and the left-handed person and the cutting of the special guillotine by changing the positions of the two supporting wing blocks.

The two-slot pressing mode is adopted, and enough space is provided for designing the slots, so that the requirement of pin (wire frame) trimming of a plurality of small-outline packages, wing-shaped lead sheet packages and double-sided lead flat package devices is met.