KR20220000089A - Sawing apparatus with multi bladed band - Google Patents

Abstract

A multi-blade cutting apparatus, according to the present invention, comprises: a cutting unit including a blade assembly on which a plurality of blades are parallel to each other and spaced apart from each other and a reciprocating transfer board for supporting the blade assembly; a guide rail which supports the reciprocating transfer board so that the reciprocating transfer board can be linearly movable; a driving device which allows the reciprocating transfer board to reciprocate; a movable table which is disposed on a lower side of the blade assembly so that a workpiece can be placed on the movable table; an elevating device which elevates the movable table so that the workpiece placed on the movable table can be brought into contact with the plurality of blades; an abrasive liquid supply device which supplies an abrasive liquid including an abrasive between the workpiece placed on the movable table and the blades; a load cell which is installed on the movable table so as to detect a load applied to the movable table; and a control unit which controls the elevating device according to a detection signal of the load cell. The multi-blade cutting apparatus is capable of increasing a cutting speed, thereby improving productivity.

Description

MULTI BLADED BAND {SAWING APPARATUS WITH MULTI BLADED BAND}

The present invention relates to a cutting device, and more particularly, to a multi-blade cutting device capable of precisely and effectively cutting a workpiece by reciprocating thin plate-shaped multiple blades while supplying an abrasive solution.

Recently, heat dissipation has emerged as a very important issue in various semiconductor components such as power semiconductors, that is, insulated gate bipolar mode transistors (IGBTs), power semiconductors such as MOSFETs, power control chips, and high-power light emitting devices for lighting. .

In order to solve such a heat dissipation problem, various types of heat dissipation parts are used in order to be directly attached to a semiconductor device to effectively dissipate heat generated from the device. For heat dissipation parts, low thermal expansion materials are used that have high thermal conductivity and are similar in thermal expansion coefficient to that of semiconductor devices (coefficient of thermal expansion 3 to 10 ppm/K). As such heat dissipation parts, a metal composite material made of dissimilar metals, a ceramic-metal or a carbon-metal matrix composite (MMC) are mainly used.

For the metal composite material, conductors with different properties, for example, copper-molybdenum, copper-tungsten alloy, or laminated materials are used. In the metal composite material, properties suitable for semiconductor device characteristics, thermal conductivity, coefficient of thermal expansion, etc. can be obtained by controlling the composition of the two materials or by injecting metal into the pores of the preform to control the ratio of the pores.

The processing properties of a composite material composed of different materials are non-uniform, and in general, the toughness or brittleness of the material is very high. Therefore, it is very difficult to cut or shape the composite material manufactured in the form of an ingot or substrate.

Conventionally, in order to process a metal composite material having a certain standard, an electric discharge machining method in which the material is melted and processed at a high temperature using electrical energy is used. Electrical discharge machining is a machining method that artificially generates a discharge phenomenon and uses the energy. Electrolyte solution is injected between the metal disk electrode connected to the + electrode side through a brush and the workpiece connected to the - electrode side through a brush to rotate the disk and process the workpiece. will be cut This method is used to cut a strong transformer thin iron core, magnetic steel, and super-hard alloy. If the workpiece has conductivity, any shape can be machined, there is no restriction on machining, and the workability is high and the machining surface is uniform. However, electrical discharge machining has disadvantages in that electrodes required for processing must be prepared, electrode materials are limited, processing speed is slow, and equipment is expensive.

If complicated shape processing is not required, there is a cutting method using a fine diamond wire-type or band-type saw blade as a relatively inexpensive mechanical cutting method. However, the conventional mechanical cutting method as described above has disadvantages in that processability is poor and processing quality is not good.

Registered Patent Publication No. 1514561 (2015. 04. 22.)

The present invention has been devised in view of the above points, and by cutting the workpiece by reciprocating thin plate-type multiple blades while supplying abrasive liquid, the cutting quality is improved, and the cutting speed is improved to improve productivity. An object of the present invention is to provide a multi-blade cutting device that can be

Objects of the present invention are not limited to those described above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

A multi-blade cutting device according to the present invention for achieving the object as described above, a cutting unit having a blade assembly in which a plurality of blades are spaced apart in parallel, and a reciprocating transport for supporting the blade assembly; a guide rail supporting the reciprocating platform to be linearly movable; a driving device for reciprocating the reciprocating platform; a movable table disposed below the blade assembly so that a workpiece can be placed; a lifting device for elevating the movable table so that the workpiece placed on the movable table can come into contact with the plurality of blades; a polishing liquid supply unit for supplying a polishing liquid containing an abrasive material between the blade and the workpiece placed on the movable table; a load cell installed on the movable table to detect a load applied to the movable table; and a controller configured to control the lifting device according to the detection signal of the load cell.

The multi-blade cutting device according to the present invention may include an ultrasonic oscillator installed in the cutting unit to apply ultrasonic waves to the plurality of blades.

The multi-blade cutting device according to the present invention may include an ultrasonic oscillator installed on the movable table to apply ultrasonic waves to the workpiece placed on the movable table.

The multi-blade cutting device according to the present invention may include a;

The multi-blade cutting device according to the present invention includes a; and a collection tank installed below the movable table to collect the slurry in which chips falling from the workpiece by the blade are mixed, and a filter for passing chips and filtering out abrasives from the slurry collected in the collection tank; It may include a chip discharging unit for discharging the chips passing through the filter, and an abrasive discharging unit for discharging the abrasive filtered by the filter.

The blade assembly includes a blade jig having a plurality of jig grooves spaced apart from each other into which the ends of each of the plurality of blades are inserted, and a fixing mechanism coupled to the blade jig to fix the plurality of blades to the blade jig, A mounting groove into which the blade jig is inserted may be provided in the reciprocating platform.

An elastically deformable buffer member may be inserted into the mounting groove to be interposed between the reciprocating carrier and the blade jig.

The driving device may include a rotation cam, a connecting rod connecting the rotation cam and the reciprocating rod, and a motor providing a rotational force to the rotation cam.

An end of the blade in contact with the workpiece may be concave-convex.

The workpiece cut by the blade may be combined with a pedestal made of a material softer than the workpiece and placed on the movable table.

The multi-blade cutting device according to the present invention as described above raises the workpiece toward the blade side while reciprocating the cutting unit including a plurality of thin plate blades at high speed to maintain a constant contact pressure between the blade and the workpiece. And by supplying an abrasive between the workpiece and the blade and using the abrasive as a saw blade, the workpiece can be precisely and effectively cut.

In addition, the multi-blade cutting device according to the present invention can effectively cut various materials such as metal composite materials, ceramic composite materials, carbon composite materials, metal-ceramic-based composite materials, and single metal steel materials composed of more than one type of material. It is possible. And it is possible to adjust the cutting speed according to the type of material, so that the cutting quality can be improved. In particular, in cutting copper composite materials such as copper-molybdenum or copper-tungsten, and non-ferrous metals such as aluminum, it can solve the problem of processing defects due to adhesion between the blade and the workpiece due to the unique ductility of the metal material, and high-quality processing can be secured, and high-precision cutting work can be performed at high speed.

In addition, the multi-blade cutting device according to the present invention applies ultrasonic vibration to the blade or the workpiece, thereby minimizing friction between the workpiece and the blade during the cutting process to improve the cutting quality, increase the cutting speed, and improve productivity. have.

Effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a plan view showing a multi-blade cutting device according to an embodiment of the present invention.
Figure 2 is a side view showing a multi-blade cutting device according to an embodiment of the present invention.
Figure 3 is for explaining a method of installing the blade assembly of the multi-blade cutting device according to an embodiment of the present invention on the reciprocating platform.
Figure 4 is an exploded perspective view showing a portion of the blade assembly provided in the multi-blade cutting device according to an embodiment of the present invention.
5 is for explaining a method of coupling the blade to the blade jig according to an embodiment of the present invention.
Figure 6 is for explaining the operation of the multi-blade cutting device according to an embodiment of the present invention.
Figure 7 is for explaining a method of cutting a workpiece by the blade of the multi-blade cutting device according to an embodiment of the present invention, acting with an abrasive.
8 shows a modified example of the blade.
9 shows an abrasive recovery device of a multi-blade cutting device according to an embodiment of the present invention.
10 is a side view showing a multi-blade cutting device according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

In describing the present invention, the size or shape of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation.

In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms should be interpreted as meanings and concepts consistent with the technical spirit of the present invention based on the contents throughout this specification.

In order to clearly explain the present invention, the description of parts not related to the technical idea of the present invention is omitted, and the same reference numerals are given to the same or similar elements throughout the specification.

In addition, in various embodiments, components having the same configuration will be described using the same reference numerals only in the representative embodiment, and only configurations different from the representative embodiment will be described in other embodiments.

Throughout the specification, when a part is "connected" to another part, it includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. In addition, when it is said that a part "includes" a certain component, this may mean further including other components rather than excluding other components unless otherwise stated.

As shown in the drawing, the multi-blade cutting device 100 according to an embodiment of the present invention is a housing 105, a movable table 110 on which the workpiece 10 is placed, and the movable table 110 to move a lifting device 113 and a rotating device 118 for 150 , a polishing liquid supply 155 for supplying the polishing liquid 30 to the workpiece 10 placed on the movable table 110 , and an abrasive for recovering the abrasive 40 included in the polishing liquid 30 . It includes a recovery device 158 and a controller 172 for controlling the overall operation of the multi-blade cutting device 100 . This multi-blade cutting device 100 can cut the workpiece 10 by reciprocating the cutting unit 124 in which the thin plate-shaped blades 126 are multi-arranged in parallel at high speed.

The movable table 110 is disposed inside the housing 105 so that the workpiece 10 can be placed. The movable table 110 may rise from the lower side of the cutting unit 124 to the cutting unit 124 side. The workpiece 10 is disposed on the movable table 110 in a state coupled to the pedestal 20 . The pedestal 20 is a one-time consumable item that can be cut by the cutting unit 124 , and may be made of a material that can be cut more easily than the workpiece 10 , that is, a material softer than the workpiece 10 . The pedestal 20 may be coupled to the workpiece 10 in various ways, such as an adhesive method. By using the pedestal 20, the movable table 110 can be prevented from being damaged by the blade 126 of the cutting unit 124, and the workpiece 10 can be smoothly cut to the lower end.

The movable table 110 is provided with a fixing jig 111 for fixing the workpiece 10 . The fixing jig 111 may have various structures capable of fixing the workpiece 10 or the pedestal 20 on the movable table 110 .

The movable table 110 can be lifted and rotated by the lifting device 113 and the rotating device 118 .

The elevating device 113 is installed in the housing 105 to elevate the movable table 110 . As the lifting device 113 raises the movable table 110 toward the cutting unit 124 , the workpiece 10 placed on the movable table 110 may come into contact with the blade 126 of the cutting unit 124 , and the workpiece 10 may be in contact with the blade 126 of the cutting unit 124 . (10) can be cut by the blade 126 reciprocating at high speed. The lifting device 113 may be controlled by the controller 172 to move the movable table 110 toward the cutting unit 124 in accordance with the cutting speed of the workpiece 10 .

The lifting device 113 includes a rack gear 114 connected to the movable table 110 , a pinion gear 115 meshing with the rack gear 114 , and a motor 116 for rotating the pinion gear 115 . do. The motor 116 may be controlled by the controller 172 to rotate the pinion gear 115 in a forward or reverse direction. As the pinion gear 115 rotates, the rack gear 114 may linearly move so that the movable table 110 may be raised and lowered.

The lifting device 113 may have various other structures capable of elevating the movable table 110 in addition to the illustrated structure.

The rotating device 118 may rotate the movable table 110 in a state parallel to the bottom of the housing 105 . That is, the rotating device 118 may rotate the movable table 110 about a rotational central axis parallel to the lifting direction of the movable table 110 . The rotating device 118 may be disposed between the movable table 110 and the rack gear 114 to connect the movable table 110 and the rack gear 114 . The rotation device 118 rotates the movable table 110 so that the angle of the workpiece 10 with respect to the blade 126 can be variously adjusted, and the workpiece 10 can be cut into various shapes.

A load cell 120 is installed between the rack gear 114 and the rotating device 118 . The load cell 120 may detect a load applied to the movable table 110 and transmit a detection signal to the controller 172 . By detecting the load applied to the movable table 110 by the load cell 120 , the pressing force by which the blade 126 presses the workpiece 10 can be measured.

The control unit 172 controls the lifting device 113 according to the detection signal of the load cell 120 . That is, the control unit 172 can adjust the speed at which the movable table 110 rises by controlling the elevating device 113 so that the pressing force by which the blade 126 presses the workpiece 10 maintains a value in a preset range. have. Through such feedback control, it is possible to increase the cutting efficiency of the workpiece 10 and improve the cutting quality.

The drawing shows that the rotating device 118 is installed between the movable table 110 and the lifting device 113 , and the load cell 120 is installed between the lifting device 113 and the rotating device 118 . However, the arrangement of these components may be variously changed. That is, the lifting device 113 , the rotating device 118 , and the load cell 120 may be connected to the lower side of the movable table 110 in various orders.

In addition, an ultrasonic oscillator 122 is installed on the movable table 110 . The ultrasonic oscillator 122 may be controlled by the controller 172 to apply ultrasonic waves to the workpiece 10 placed on the movable table 110 . When ultrasonic vibration is applied to the workpiece 10 while cutting the workpiece 10 with the blade 126, the blade 126 is prevented from adhering to the workpiece 10, and the blade 126 and the workpiece ( 10) Friction between the two can be minimized. And it is possible to reduce the problem that the abrasive 40 supplied between the blade 126 and the workpiece 10 is adhered to the blade 126 or the workpiece 10, thereby improving the cutting quality, increasing the cutting speed, and increasing productivity. can be improved

1 to 5 , the cutting unit 124 includes a blade assembly 125 and a reciprocating carrier 137 supporting the blade assembly 125 . The cutting unit 124 is linearly supported on the guide rail 147 installed in the housing 105 . A plurality of guide rails 147 may be installed to be spaced apart from each other in parallel.

The blade assembly 125 includes a plurality of blades 126 , a blade jig 128 for supporting the plurality of blades 126 , and a fixing mechanism 132 for fixing the plurality of blades 126 to the blade jig 128 . includes

The blade 126 has a thin plate shape and is disposed parallel to the moving direction of the blade assembly 125 . The blade 126 may be made of tool steel, carbon steel, special alloy steel, or other various metal materials.

The blade jig 128 is provided with a plurality of jig grooves 129 and coupling grooves 130 . Ends of each of the plurality of blades 126 may be inserted into the plurality of jig grooves 129 . The plurality of jig grooves 129 are spaced apart from each other at regular intervals along the longitudinal direction of the blade jig 128 . Ends of each of the plurality of blades 126 are inserted into the plurality of jig grooves 129 so that the plurality of blades 126 may be disposed parallel to each other and spaced apart from each other at regular intervals. A pair of coupling grooves 130 is disposed to be biased toward both ends of the blade jig 128 .

The fixing mechanism 132 includes a fixing base 133 and a fixing member 135 . The fixture 133 is coupled to the surface of the blade jig 128 so as to cover the end of the blade 126 inserted into the jig groove 129 . A through hole 134 corresponding to the coupling groove 130 of the blade jig 128 is provided in the fixing base 133 . The fixing member 135 is inserted into the coupling groove 130 of the blade jig 128 through the through hole 134 of the fixing member 133 to fix the fixing member 133 to the blade jig 128 . The number or position of the coupling groove 130 and the through hole 134 may be variously changed, and the number of the fixing members 135 may be variously changed.

The blade jig 128 and the fixing mechanism 132 are provided in pairs so as to fix both ends of the blade 126 , respectively.

The reciprocating platform 137 is coupled to the blade assembly 125 and is linearly supported by a pair of guide rails 147 installed in the housing 105 to reciprocate. The reciprocating platform 137 is provided with an opening 138 and a pair of mounting grooves 139 . The opening 138 is formed in the central portion of the reciprocating carriage 137 so as to penetrate the reciprocating carriage 137 in the vertical direction. The workpiece 10 supported by the movable table 110 may enter into the opening 138 and come into contact with the plurality of blades 126 . A pair of mounting grooves 139 are disposed on both sides of the opening 138 . A blade jig 128 may be inserted into each of the mounting grooves 139 . A pair of blade jigs 128 are inserted into a pair of mounting grooves 139 so that the blade assembly 125 may be coupled to the reciprocating carrier 137 . At this time, the plurality of blades 126 are placed to cross the opening 138 .

A buffer member 141 is inserted into each of the mounting grooves 139 . The buffer member 141 is interposed between the reciprocating transport 137 and the blade jig 128 . The buffer member 141 may be made of various elastically deformable materials. During the cutting process, the blade assembly 125 may move in a direction parallel to the moving direction of the reciprocating transport 137 with respect to the reciprocating transport 137 while compressing the cushioning member 141 . And during the cutting process, the buffer member 141 may buffer the impact applied to the blade assembly 125 . Accordingly, it is possible to reduce damage to the blade 126 and increase cutting efficiency.

A plurality of ultrasonic oscillators 143 for generating ultrasonic waves and a connecting shaft 145 to which the driving device 150 is connected are installed on the reciprocating platform 137 . The ultrasonic oscillator 143 may be controlled by the controller 172 to apply ultrasonic waves to the plurality of blades 126 . While cutting the workpiece 10 with the blade 126, ultrasonic vibration is applied to the blade 126 to prevent the blade 126 from sticking to the workpiece 10, and the blade 126 and the workpiece 10 ) can be minimized. And it is possible to reduce the problem that the abrasive 40 supplied between the blade 126 and the workpiece 10 is adhered to the blade 126 or the workpiece 10, thereby improving the cutting quality, improving the cutting speed, and productivity. can improve

Although not shown in the drawings, a member for preventing the blade jig 128 inserted into the mounting groove 139 from being separated from the mounting groove 139 may be installed on the reciprocating carrier 137 .

The cutting unit 124 is connected to the driving device 150 while supporting the plurality of blades 126 and the plurality of blades 126 in addition to the structure shown in various other including a reciprocating transport 137 that can reciprocate. structure can be changed.

The driving device 150 includes a rotation cam 151 , a connecting rod 152 connecting the rotation cam 151 and the reciprocating rod 137 , and a motor 153 that provides rotational force to the rotation cam 151 . include One end of the connecting rod 152 is rotatably coupled to the rotation cam 151 , and the other end of the connecting rod 152 is rotatably coupled to the connecting shaft 145 of the reciprocating rod 137 . One end of the connecting rod 152 is connected to a position eccentric from the central axis of rotation of the rotation cam 151 among the rotation cams 151 . As the rotation cam 151 rotates by the motor 153 , the connecting rod 152 may reciprocate the reciprocating platform 137 .

In addition to the structure shown, the driving device 150 may be changed to various other structures connected to the cutting unit 124 so as to reciprocate the cutting unit 124 .

The polishing liquid supply 155 supplies the polishing liquid 30 between the workpiece 10 placed on the movable table 110 and the plurality of blades 126 . The polishing liquid supply 155 is disposed on the movable table 110 and includes an abrasive liquid discharge unit 156 for discharging the polishing liquid 30 toward the movable table 110 , and an abrasive liquid discharge unit for storing the polishing liquid 30 . It may include an abrasive liquid tank (not shown) for supplying the abrasive liquid 30 to the 156 .

The abrasive liquid 30 is made in a liquid form in which the abrasive 40 in powder form is contained in a liquid medium. As shown in FIGS. 6 and 7 , during the cutting process for the workpiece 10 , the polishing liquid supply 155 supplies the polishing liquid 30 onto the workpiece 10 placed on the movable table 110 , An abrasive 40 is placed between the workpiece 10 and the blade 126 . And, it is possible to cut the workpiece 10 by abrading the workpiece 10 with the abrasive 40 by reciprocating the blade 126 at high speed.

In this way, by maintaining an appropriate contact pressure between the blade 126 and the workpiece 10 while supplying the abrasive liquid 30 between the workpiece 10 and the blade 126, the abrasive 40 can serve as a saw blade. have. Accordingly, it is possible to precisely cut the workpiece 10 with the blade 126 without a saw blade. By changing the particle size or material of the abrasive 40 contained in the polishing liquid 30 , the cutting speed of the workpiece 10 and the roughness of the cut surface of the workpiece 10 can be adjusted.

As the abrasive 40, SiC, white alumina, ceramic particles, or various other types may be used.

The end of the blade 126 is rough-processed so that the abrasive 40 placed between the workpiece 10 and the blade 126 can cut the workpiece 10 while moving more stably according to the movement of the blade 126 . can be

For example, the blade 180 shown in (a) of FIG. 8 has been subjected to concavo-convex processing so that the concavo-convex portion 181 is formed at the end in contact with the workpiece 10 . As shown in FIG. 8(b), the blade 180 can more stably move the abrasive 40 while reciprocating by being caught in the concave-convex portion 181 so that the abrasive 40 can function as a saw blade. . Therefore, the cutting efficiency by the abrasive 40 can be improved. The blade 180 may be manufactured through abrasion treatment or corrosion treatment by a sanding method or the like.

1, 2, and 9, the abrasive recovery device 158 is installed so that the slurry 50 falling from the workpiece 10 can be introduced. Here, the slurry 50 is a mixture of chips falling from the workpiece 10 by the blade 126 with the abrasive solution 30 supplied from the abrasive solution supplier 155 . The abrasive recovery device 158 includes a collection tank 159 installed below the movable table 110 so that the slurry 50 can be introduced, a separation housing 162 installed inside the collection tank 159, A filter 164 installed on one side of the separation housing 162 , a chip discharge unit 165 connected to the separation housing 162 , an abrasive discharge unit 166 connected to the collection tank 159 , and a pumping device (168).

The abrasive recovery device 158 may recover the abrasive 40 by separating the abrasive 40 having a relatively large particle size from the chip having a relatively small particle size using the filter 164 . The filter 164 has a structure that allows the chips to pass through and the abrasive 40 to filter out.

A collection chamber 160 in which the slurry 50 is accommodated is provided inside the collection tank 159 . The slurry 50 falling to the bottom of the housing 105 may be guided to the collection chamber 160 by the slurry guide 161 to be collected. A separation chamber 163 for accommodating chips passing through the filter 164 is provided inside the separation housing 162 . The filter 164 is installed between the collection chamber 160 and the separation chamber 163 to introduce only the chips and the liquid medium into the separation chamber 163 .

The pumping device 168 includes a propeller 169 and a motor 170 rotating the propeller 169 . The pumping device 168 may pump the slurry 50 of the collection chamber 160 toward the filter 164 by rotating the propeller 169 with the motor 170 . By the action of the pumping device 168, the slurry 50 of the collection chamber 160 is pumped toward the filter 164, so that chips contained in the slurry 50 are actively passed through the filter 164 into the separation chamber 163. can be imported. The chips and liquid medium introduced into the separation chamber 163 are discharged through the chip discharge unit 165 .

The abrasive 40 remaining in the collection chamber 160 is discharged through the abrasive discharge unit 166 . That is, after the control unit 172 stops the pumping device 168 , the abrasive 40 and the liquid medium in the collection chamber 160 are separated by opening and operating the abrasive discharge valve 167 installed in the abrasive discharge unit 166 . It may be discharged through the abrasive discharge unit 166 . The abrasive 40 discharged through the abrasive discharge unit 166 may be recovered and then reused.

The control unit 172 controls the overall operation of the multi-blade cutting device (100). The operation of the multi-blade cutting device 100 by the control unit 172 is as follows.

After the workpiece 10 is fixed on the movable table 110 in a state coupled to the pedestal 20, the control unit 172 operates the driving device 150 to move the cutting unit 124 reciprocally at high speed while lifting and lowering. By operating the device 113 , the movable table 110 is raised toward the blade 126 so that the workpiece 10 is in contact with the blade 126 . In addition, the control unit 172 operates the polishing liquid supply 155 to supply the polishing liquid 30 between the blade 126 and the workpiece 10 . At this time, the reciprocating blade 126 cuts the workpiece 10 through the abrasive 40 contained in the abrasive liquid 30 .

During the cutting process of the workpiece 10 , the controller 172 operates the ultrasonic oscillators 122 and 143 to apply ultrasonic waves to the blade 126 and the workpiece 10 . The phenomenon that the blade 126 adheres to the workpiece 10 is prevented by the ultrasonic vibration applied to the blade 126 and the workpiece 10, and friction between the blade 126 and the workpiece 10 is minimized. can In addition, since the problem that the abrasive 40 is adhered to the blade 126 or the workpiece 10 by ultrasonic waves does not occur, the cutting quality of the workpiece 10 is improved, and the cutting speed can be increased.

In addition, the control unit 172 controls the lifting device 113 according to the detection signal of the load cell 120 connected to the movable table 110 during the cutting process of the workpiece 10 to speed up the movement of the movable table 110 . adjust the Through this feedback control, the control unit 172 increases the cutting efficiency for the workpiece 10 by allowing the blade 126 to maintain a value in the preset range of the pressing force for pressing the workpiece 10, and improve the cutting quality can do it

Meanwhile, during the cutting process of the workpiece 10 , the slurry 50 falling from the workpiece 10 is collected into the collection tank 159 of the abrasive recovery device 158 . The controller 172 operates the pumping device 168 of the abrasive recovery device 158 to pump the slurry 50 in the collection tank 159 toward the filter 164 . At this time, the chips contained in the slurry 50 are introduced into the separation housing 162 through the filter 164 and are discharged through the chip discharge unit 165 . After operating the pumping device 168 for a predetermined time, the control unit 172 operates the abrasive discharge unit valve 167 to open the abrasive material 40 and the liquid medium in the collection chamber 160 to the abrasive discharge unit 166. discharged through The abrasive 40 discharged through the abrasive discharge unit 166 may be recovered and then reused.

As described above, the multi-blade cutting device 100 according to an embodiment of the present invention reciprocates the cutting unit 124 including a plurality of thin plate-shaped blades 126 at high speed while turning the workpiece 10 into a blade ( 126) to keep the contact pressure between the blade 126 and the workpiece 10 constant. And by supplying the abrasive 40 between the workpiece 10 and the blade 126 and using the abrasive 40 as a saw blade, the workpiece 10 can be precisely and effectively cut.

In addition, the multi-blade cutting device 100 according to an embodiment of the present invention is a metal composite material, a ceramic composite material, a carbon composite material, a metal-ceramic-based composite material, a single metal steel material, etc. Effective cutting of materials is possible. And it is possible to adjust the cutting speed according to the type of material, so that the cutting quality can be improved. In particular, when cutting copper composite materials such as copper-molybdenum or copper-tungsten, and non-ferrous metals such as aluminum, it can solve the problem of processing defects due to adhesion between the blade and the workpiece due to the unique ductility of the metal material, and high-quality processing can be secured, and high-precision cutting work can be performed at high speed.

In addition, the multi-blade cutting device 100 according to an embodiment of the present invention applies ultrasonic vibration to the blade 126 or the workpiece 10, thereby friction between the workpiece 10 and the blade 126 during the cutting process. It is possible to improve cutting quality, increase cutting speed, and improve productivity by minimizing

On the other hand, Figure 10 is a side view showing a multi-blade cutting device according to another embodiment of the present invention.

The multi-blade cutting device 200 shown in FIG. 10 includes a housing 105, a movable table 110 on which the workpiece 10 is placed, and a lifting device 113 and a rotating device for moving the movable table 110 ( 118), a cutting unit 124 for cutting the workpiece 10 placed on the movable table 110, a driving device 150 for reciprocating the cutting unit 124, and the movable table 110 An abrasive liquid supplier 155 for supplying the abrasive liquid 30 to the workpiece 10 to be placed, an abrasive recovery device 210 for recovering the abrasive 40 contained in the abrasive liquid 30, and multiple blade cutting and a control unit 172 that controls the overall operation of the device 200 . This multi-blade cutting device 200 is a modified structure of the abrasive recovery device 210 compared to the multi-blade cutting device 100 described above.

The abrasive recovery device 210 includes a collection tank 211 installed below the movable table 110 so that the slurry 50 falling from the workpiece 10 can be introduced, and the slurry collected in the collection tank 211 ( A separation housing 215 connected to the collection tank 211 through a connection pipe 213 so that 50) can be introduced, a filter 216 installed on one side of the separation housing 215, and a separation housing 215 It includes a chip discharging unit 217 connected to the abrasive discharging unit 218 and a supply pipe 220 . A connector valve 214 may be installed in the connector pipe 213 , and an abrasive outlet valve 219 may be installed in the abrasive outlet 218 . A supply pipe valve may be installed in the supply pipe 220 , and a gas or liquid supply device (not shown) is connected to the supply pipe 220 to supply gas or liquid through the supply pipe 220 . In addition, although not shown, a pump for the flow of the slurry 50 may be installed between the collection tank 211 and the separation housing 215 .

The connecting pipe valve 214 , the abrasive outlet valve 219 and the supply pipe valve are controlled by the control unit 172 . The filter 216 has a structure capable of passing the chips in the slurry 50 and filtering the abrasive 40 .

The abrasive recovery device 210 may recover the abrasive 40 included in the slurry 50 in the following manner.

During the cutting process of the workpiece 10 , the slurry 50 falling from the workpiece 10 is guided to the inside of the collection tank 211 by the slurry guide 212 and collected. The slurry 50 collected into the collection tank 211 flows into the separation housing 215 through the connection pipe 213 and is filtered by the filter 216 in the separation housing 215 . That is, the chips included in the slurry 50 pass through the filter 216 and are discharged through the chip discharge unit 217 , and the abrasive 40 filtered by the filter 216 passes through the abrasive discharge unit valve 219 . is emitted In the process of discharging the abrasive 40 to the abrasive discharge unit 218 , the abrasive discharge valve 219 opens and liquid or gas flows into the separation housing 215 through the supply pipe 220 to the abrasive 40 ) may be discharged through the abrasive discharge unit 218 .

Although preferred examples of the present invention have been described above, the scope of the present invention is not limited to the forms described and illustrated above.

For example, in the drawing, the ultrasonic oscillator 122 is installed on the movable table 110 , and the ultrasonic oscillator 143 is provided on the cutting unit 124 , the workpiece 10 placed on the movable table 110 and the cutting unit Although it is shown that ultrasonic vibration is applied to the blade 126 at 124 , the ultrasonic oscillator may be installed only on either side of the movable table 110 and the cutting unit 124 .

In addition, the abrasive recovery apparatus for recovering the abrasive 40 included in the slurry 50 falling from the workpiece 10 may be changed to a structure other than the illustrated structure.

While the present invention has so far been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as so shown and described, and is not intended to be limited by the scope of the appended claims. It will be understood by those skilled in the art that many changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention.

100, 200: multi-blade cutting device 105: housing
110: movable table 113: elevating device
118: rotating device 120: load cell
122, 143: ultrasonic oscillator 124: cutting unit
125: blade assembly 126, 180: blade
128: blade jig 132: fixing mechanism
133: fixed base 137: reciprocating transport
141: buffer member 147: guide rail
150: drive device 151: rotation cam
152: connecting rod 155: abrasive liquid supply
158, 210: abrasive recovery device 159, 211: collection tank
161, 212: slurry guide 162, 215: separation housing
164, 216: filter 165, 217: chip outlet
166, 218: abrasive discharge unit 168: pumping device
172: control unit 181: concave-convex part

Claims (10)

A cutting unit having a blade assembly in which a plurality of blades are spaced apart in parallel, and a reciprocating rod supporting the blade assembly;
a guide rail supporting the reciprocating platform to be linearly movable;
a driving device for reciprocating the reciprocating platform;
a movable table disposed below the blade assembly so that a workpiece can be placed;
a lifting device for elevating the movable table so that the workpiece placed on the movable table can come into contact with the plurality of blades;
a polishing liquid supply unit for supplying a polishing liquid containing an abrasive material between the blade and the workpiece placed on the movable table;
a load cell installed on the movable table to detect a load applied to the movable table; and
A multi-blade cutting device comprising a; a control unit for controlling the lifting device according to the detection signal of the load cell.
According to claim 1,
A multi-blade cutting device comprising a; an ultrasonic oscillator installed in the cutting unit to apply ultrasonic waves to the plurality of blades.
3. The method of claim 1 or 2,
and an ultrasonic oscillator installed on the movable table to apply ultrasonic waves to the workpiece placed on the movable table.
According to claim 1,
A multi-blade cutting device comprising a; a rotating device for rotating the movable table about a central axis of rotation parallel to the lifting direction of the movable table.
According to claim 1,
Includes; an abrasive recovery device for recovering the abrasive contained in the abrasive liquid supplied from the abrasive liquid supply unit;
The abrasive recovery device,
a collection tank installed below the movable table for collecting the slurry in which the abrasive liquid supplied from the abrasive liquid supplier and the chips falling from the workpiece by the blade are mixed;
a filter for passing chips and filtering out abrasives from the slurry collected in the collection tank;
a chip discharging unit for discharging the chips that have passed through the filter;
Multi-blade cutting device comprising an abrasive discharge unit for discharging the abrasive filtered by the filter.
According to claim 1,
The blade assembly includes a blade jig having a plurality of jig grooves spaced apart from each other into which the ends of each of the plurality of blades are inserted, and a fixing mechanism coupled to the blade jig to fix the plurality of blades to the blade jig,
The multi-blade cutting device, characterized in that the reciprocating platform is provided with a mounting groove into which the blade jig is inserted.
7. The method of claim 6,
A multi-blade cutting device, characterized in that an elastically deformable buffer member is inserted into the mounting groove and interposed between the reciprocating transport and the blade jig.
According to claim 1,
The driving device is
rotating cam;
a connecting rod connecting the rotary cam and the reciprocating rod;
Multi-blade cutting device comprising a motor for providing a rotational force to the rotation cam.
According to claim 1,
The blade is a multi-blade cutting device, characterized in that the concave-convex end in contact with the workpiece.
According to claim 1,
The multi-blade cutting device, characterized in that the workpiece to be cut by the blade is coupled to a pedestal made of a material softer than the workpiece and placed on the movable table.

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