Search

KR-102964574-B1 - APPARATUS FOR MANUFACTURING END MILL

KR102964574B1KR 102964574 B1KR102964574 B1KR 102964574B1KR-102964574-B1

Abstract

An embodiment of the present invention provides an end mill shape processing device capable of reducing defects in the end mills produced and effectively removing machining dust, oil mist, etc. generated in the working environment. Here, the end mill shape processing device includes a bed section, a processing section, a cutting fluid spraying section, a suction section, and a dust collection section. The bed section is equipped with a rotary chuck to which a workpiece in the form of a round bar to be shaped into an end mill is coupled, and moves back and forth. The processing section is provided on the reciprocating path of the bed section and shapes the workpiece, which rotates together with the rotary chuck, so that it becomes an end mill. The cutting fluid spraying section sprays cutting fluid onto the workpiece and the processing section while the workpiece is being processed by the processing section. The suction section sucks up machining by-products, including oil mist and machining dust generated by the processing of the workpiece. The dust collection section collects the machining by-products sucked up by the suction section.

Inventors

  • 마재복

Dates

Publication Date
20260512
Application Date
20250317

Claims (6)

  1. A bed portion that reciprocates and is equipped with a rotary chuck to which a workpiece in the shape of a round bar to be shaped by an end mill is joined; A machining unit configured on the reciprocating movement path of the bed portion and rotating together with the rotary chuck to shape the workpiece so that it becomes an end mill; A cutting fluid spraying unit that sprays cutting fluid onto the workpiece and the processing unit while the workpiece is being processed by the processing unit; A suction unit for sucking up processing by-products including oil mist and processing dust generated by the processing of the above-mentioned workpiece; and It includes a dust collection unit that collects the processing by-product sucked in by the above suction unit, and It includes a temperature control unit that is provided in the bed portion and positioned in front of the rotary chuck, positioned between the rotary chuck and the machining portion when the workpiece is machined by the machining portion, and controls the temperature of the workpiece by spraying cooling oil onto the workpiece. The above temperature control unit A housing portion provided as a pair on the outer side of the rotating chuck so that the workpiece coupled to the rotating chuck is positioned between them, and which moves to move closer to each other along a direction perpendicular to the axial direction of the workpiece, so as to be in close contact with each other with the workpiece between them, or move away from each other; A porous body portion having a plurality of micro-passages connected to each other across the surface and interior, which are provided on the inner side of one end portion facing each other in the above-mentioned pair of housing portions and when the above-mentioned pair of housing portions are in close contact with each other, and which wrap each other around half of the outer circumference of the workpiece. The cooling oil circulation unit comprises a storage portion in which cooling oil is stored, a supply portion for supplying cooling oil from the storage portion, a flow path portion connected to the supply portion and provided inside the housing portion and connected to the porous body portion to supply cooling oil to the porous body portion so that the cooling oil cools the workpiece coupled to the rotating chuck, and a cooling portion connected to the flow path portion and cooling the cooling oil supplied from the supply portion. An end mill shape processing device characterized by the above porous body allowing the cooling oil discharged from the above fluid channel to spread and move, thereby increasing the heat exchange area with the outer surface of the workpiece.
  2. delete
  3. delete
  4. In paragraph 1, The above pair of housing portions is formed at the lower part of one end portion where the porous body portion is provided and has an outlet for discharging the cooling oil, The above cooling oil circulation part An end mill shape processing device characterized by having a recovery unit provided in one of the above-mentioned pair of housing units, which receives the cooling oil falling through the discharge port after cooling the workpiece and guides the cooling oil to move to the storage unit.
  5. In paragraph 4, The above temperature control unit A temperature sensor equipped at the above-mentioned discharge port and sensing the temperature of the discharged cooling oil, and An end mill shape processing device characterized by including an information table regarding the expected temperature of a workpiece being processed according to the temperature of the cooling oil that is heat-exchanged with the workpiece being processed, and a control unit that controls the cooling unit to control the temperature of the cooling oil by comparing a measured temperature received in real time from a temperature sensor with the limit allowable temperature so that the measured temperature does not exceed the limit allowable temperature, wherein a limit allowable temperature is pre-set and stored to prevent defects in the end mill to be produced.
  6. In paragraph 5, The above temperature control unit A column frame having a pair provided on the bed portion on both sides of the rotary chuck, a concave portion extending horizontally perpendicular to the axial direction of the workpiece on the upper portion, and guide grooves extending horizontally perpendicular to the axial direction of the workpiece on the opposite surface of the concave portion, respectively; A pair of rails provided in the housing portion and extending in a horizontal direction to be coupled to the guide groove, and a slider having a screw groove formed through the center, A screw coupled to the above screw groove, and A driving unit coupled to the screw and rotating the screw to move a pair of the housing parts closer together or further apart, and It includes a moving part having a support frame provided on the column frame and supporting the driving part, An end mill shape processing device characterized by the above-described control unit controlling the driving unit to move the pair of housing units closer together and then controlling the supply unit to supply cooling oil to the porous body unit.

Description

Apparatus for Manufacturing End Mill The present invention relates to an end mill shape processing device, and more specifically, to an end mill shape processing device capable of reducing the occurrence of defects in the end mills produced and effectively removing processing dust, oil mist, etc. generated in the working environment. An end mill, also known as an end milling cutter, resembles a drill in appearance; however, unlike a drill, its top and side surfaces are composed of blades, allowing it to machine the flat and side surfaces of a workpiece. An end mill is a tool attached to a machine tool that rotates to cut and smooth metal, and it is primarily used to machine molds. End mills are classified into various types based on the shape of their blades. Representative types include square end mills and ball end mills. Square end mills consist of spiral side blades and square blades that extend from these side blades and form a cross shape when viewed from the top surface. Ball end mills consist of spiral side blades and spherical ball blades that extend from these side blades. These various types of end mills are selectively mounted onto machine tools depending on the application. Typically, end mills are manufactured by gripping a carbide rod in a rotary chuck and grinding it using a diamond wheel while it is rotating to create a cutting edge on the carbide rod. Meanwhile, since high heat is generated when grinding carbide rods with a diamond wheel, cutting fluid is sprayed onto the grinding area to prevent thermal deformation of the rods. However, if this heat management is not properly maintained, defects may occur during the end mill production process, with chipping being a typical issue. Chipping refers to the formation of irregular grooves on the surface or at specific points on the cutting edge. Since tools with chipping are considered defective, they cannot be sold on the market. Furthermore, during the end milling process, machining byproducts such as processing dust and oil mist can be generated by the grinding of carbide rods by diamond wheels and the cutting fluid sprayed onto the grinding section. Although these byproducts are harmful to the health of workers, there is a problem in most work environments where they are left unattended in the workplace. FIG. 1 is a configuration diagram showing an end mill shape processing device according to an embodiment of the present invention. FIGS. 2 and FIGS. 3 are photographs showing an end mill shape processing device according to an embodiment of the present invention. FIGS. 4 and FIGS. 5 are exemplary diagrams showing a temperature control unit of an end mill shape processing device according to an embodiment of the present invention. FIG. 6 is an exemplary diagram showing one of a pair of housing parts of an end mill shape processing device according to an embodiment of the present invention. FIG. 7 is an exemplary diagram showing a porous body part of an end mill shape processing device according to an embodiment of the present invention. FIG. 8 is an exploded cross-sectional example showing a combination example of a porous body part, a flow path part, and a finishing plate combined with the housing part of FIG. 6. FIG. 9 is an exemplary diagram showing an example of the configuration of a cooling oil circulation section in a cross-sectional example in which a porous body section, a flow path section, and a finishing plate are combined and coupled to the housing section of FIG. 8. FIG. 10 is an exemplary diagram showing one of the two housing parts of a pair of housing parts of an end mill shape processing device according to an embodiment of the present invention. FIG. 11 is an exploded cross-sectional example showing a combination of a porous body part, a flow path part, and a finishing plate that are combined with the housing part of FIG. 10. FIG. 12 is an example diagram showing an example of the configuration of a cooling oil circulation section in a cross-sectional example diagram in which a porous body section, a flow path section, and a finishing plate are combined and coupled to the housing section of FIG. 11. FIG. 13 is an exemplary diagram showing a state in which a pair of housing parts of an end mill shape processing device according to an embodiment of the present invention are in close contact with each other, and the flow of cooling fluid in this state. FIG. 14 is an illustrative diagram showing an example of operation of a moving part of an end mill shape processing device according to an embodiment of the present invention. FIG. 15 is an exemplary diagram showing an example of the combination of the moving part and the housing part of FIG. 14. The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present in