CN113202748B - Scroll compressor, cutting tool, and method of manufacturing scroll - Google Patents

Scroll compressor, cutting tool, and method of manufacturing scroll Download PDF

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Publication number
CN113202748B
CN113202748B CN202110126545.7A CN202110126545A CN113202748B CN 113202748 B CN113202748 B CN 113202748B CN 202110126545 A CN202110126545 A CN 202110126545A CN 113202748 B CN113202748 B CN 113202748B
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China
Prior art keywords
scroll
fixed
cutting
cutting edge
wrap
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CN202110126545.7A
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CN113202748A (en
Inventor
崔又㳻
姜文豪
孔珪南
金京德
金成俊
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Hanon Systems Corp
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Hanon Systems Corp
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Priority claimed from KR1020200012064A external-priority patent/KR102680628B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/30—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools lathes or like tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/10—Manufacture by removing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Milling Processes (AREA)

Abstract

The invention relates to a scroll compressor, a cutting tool and a manufacturing method of a scroll, wherein in the scroll compressor, an anti-interference unit is arranged on an annular wall of a fixed scroll; in the cutting tool, the cutting edge includes a first portion machining the outer and inner peripheral surfaces of the wrap, and a second portion extending obliquely from the first portion to machine the front end edge of the wrap; in the method of manufacturing a scroll, the steps of rough machining, finish machining and chamfering the scroll are included so that the scroll can be rough machined, finish machined and chamfered in one process with one tool.

Description

Scroll compressor, cutting tool, and method of manufacturing scroll
Technical Field
The present invention relates to a scroll compressor, a cutting tool, and a scroll manufacturing method, and more particularly, to a scroll compressor, a cutting tool, and a scroll manufacturing method capable of performing rough machining, finish machining, and chamfering of a scroll wrap of a scroll with one tool in one process.
Background
Generally, an Air Conditioning (a/C) for cooling and heating a room is installed in a vehicle. Such an air conditioner includes a compressor, which is a configuration of a refrigeration system, compresses a low-temperature and low-pressure gaseous refrigerant introduced from an evaporator into a high-temperature and high-pressure gaseous refrigerant, and delivers it to a condenser.
There are two types of compressors: a reciprocating type compressing a refrigerant according to a reciprocating motion of a piston and a rotary type performing compression while performing a rotary motion. The reciprocating type includes a crank type in which a crank is transmitted to a plurality of pistons according to a transmission method of a driving source, and a swash plate type in which a rotating shaft on which a swash plate is mounted is transmitted. The rotation type includes a vane rotation type using a rotating shaft and a vane to rotate, and a scroll type using a rotating scroll and a fixed scroll.
The scroll compressor can obtain a relatively high compression ratio as compared with other types of compressors, can smoothly connect suction, compression and discharge strokes of refrigerant to obtain a stable torque, and is widely used for refrigerant compression in air conditioners and the like due to these advantages.
Looking more specifically at scroll compressors, a typical scroll compressor includes: a housing; a motor disposed within the housing; a rotary scroll that receives power from the motor and rotates; a fixed scroll fixed to the housing and forming a compression chamber together with the rotating scroll.
Here, the orbiting scroll includes a disc-shaped orbiting end plate and an orbiting wrap protruding from a center of the orbiting end plate in a direction of the fixed scroll, as shown in fig. 1, and the fixed scroll includes: a fixed end plate 42 which is a disk shape facing the rotating end plate; a fixed wrap 44 protruding from the center of the fixed end plate 42 in the direction of the orbiting scroll and meshing with the orbiting wrap; and an annular wall 46 protruding from the outer periphery of the fixed end plate 42 in the direction of the orbiting scroll and surrounding the fixed scroll 44.
Meanwhile, the orbiting scroll and the fixed scroll are manufactured by a scroll manufacturing method shown in fig. 2.
Specifically, a general scroll manufacturing method includes: step 1, OS1, of machining the rear part of the scroll (the part not facing the compression chamber); a 2 nd step OS2 of machining the front portion (portion facing the compression chamber) of the scroll; and a third step OS3 of machining a scroll hole, wherein the 2 nd step OS2 comprises: a 2-1 st step OS21 of roughing the front portion; 2-2 step OS22 of performing rough machining and finish machining on the scroll; and step 2-3, step OS23, of chamfering the front end edge of the wrap.
In the first step OS1, the rear portion of the orbiting scroll is machined, in the 2 nd-1 st step OS21, the front portion of the orbiting scroll is rough machined, in the 2 nd-2 nd step OS22, the outer and inner peripheral surfaces of the orbiting scroll are rough machined and finish machined, and in the 2 nd-3 rd step OS23, the front end edge of the orbiting scroll is chamfered.
In the fixed scroll, a rear portion of the fixed scroll is machined in the 1 st step OS1, a front portion of the fixed scroll is rough machined in the 2 nd-1 st step OS21, an outer peripheral surface and an inner peripheral surface of the fixed scroll 44 are rough machined and finish machined in the 2 nd-2 nd step OS22, and a front end edge of the fixed scroll 44 is chamfered in the 2 nd-3 rd step OS23.
However, in such a general scroll compressor, cutting tool and scroll manufacturing method, since the chamfering tool and process of the wrap (orbiting wrap, fixed wrap) are separately implemented independently from the tool and process of the rough machining and finishing of the wrap, there are problems in that the manufacturing time and manufacturing cost of the scroll are increased, and it is difficult to manage the chamfering size of the wrap.
Documents of the prior art
(patent document 1) Korean laid-open patent publication No. 10-2019-0127322
Disclosure of Invention
Accordingly, an object of the present invention is to provide a scroll compressor, a cutting tool, and a method of manufacturing a scroll, which can perform rough machining, finish machining, and chamfering of a scroll lap of the scroll by using one tool in one process.
To achieve the above object, the present invention provides a scroll compressor including: a rotary scroll receiving power to perform a rotational motion; and a fixed scroll forming a compression chamber together with the rotary scroll, wherein the fixed scroll includes: a fixed end plate formed in a disc shape; a fixed wrap protruding from a center of the fixed end plate in a direction of the orbiting scroll; and an annular wall protruding from an outer circumference of the fixed end plate in a direction of the orbiting scroll, wherein the annular wall includes an interference preventing unit.
The interference preventing unit may be formed to be able to prevent a distance from the fixed wrap from being less than a predetermined value.
The interference preventing unit may include: a lower surface facing the fixed end plate; an upper surface facing the fixed wrap and located radially outward of the lower surface; and a step surface located between the lower surface and the upper surface.
Also, the present invention provides a cutting tool comprising: a rotatable tool shaft; and a cutting edge installed at an outer circumferential surface of the tool shaft and processing a scroll of a scroll compressor, wherein the cutting edge includes: a first portion processing an outer circumferential surface and an inner circumferential surface of the wrap; and a second portion obliquely extending from the first portion to process a front end edge of the wrap.
The cutting edges include first and second cutting edges formed in different shapes from each other, a first portion of the second cutting edge is formed to be longer than a first portion of the first cutting edge, and an angle between the first and second portions of the second cutting edge may be smaller than an angle between the first and second portions of the first cutting edge.
The first cutting edge and the second cutting edge may be respectively formed in plural, and the plural first cutting edges and the plural second cutting edges may be alternately arranged with each other along a circumferential direction of the tool shaft.
One of the plurality of second cutting edges may further include a third portion extending obliquely from the second portion to remove a leading end burr of the wrap.
The cutting edge may further include a third portion extending obliquely from the second portion to remove a leading end burr of the wrap.
An angle between the third portion and the first portion may be formed to be smaller than an angle between the second portion and the first portion.
Further, the present invention provides a method of manufacturing a scroll plate, including: a step of roughly processing the front part of the scroll; and performing rough machining, finish machining and chamfering on the scroll of the scroll, wherein the rough machining, the finish machining and the chamfering of the scroll are performed through one process.
Here, the rough machining, the finishing machining, and the chamfering of the wrap may be performed with one cutting tool.
In the scroll compressor according to the present invention, the annular wall of the fixed scroll includes the interference preventing unit, and the cutting edge includes a first portion processing the outer and inner peripheral surfaces of the wrap and a second portion extending obliquely from the first portion to process the leading end edge of the wrap in the cutting tool, and in the manufacturing method of the scroll, the steps of rough processing, finishing and chamfering the wrap are included so that the wrap can be rough processed, finished and chamfered with one tool in one process. Therefore, the manufacturing time and manufacturing cost of the scroll can be reduced, and the chamfer dimension management of the lap can be facilitated.
Drawings
Fig. 1 is a perspective view showing a fixed scroll in a general scroll compressor.
Fig. 2 is a flowchart illustrating a scroll manufacturing method for manufacturing the fixed scroll of fig. 1.
Fig. 3 is a sectional view illustrating a scroll compressor according to an embodiment of the present invention.
Fig. 4 is a perspective view illustrating a fixed scroll in the scroll compressor of fig. 3.
Fig. 5 is a flowchart illustrating a scroll manufacturing method for manufacturing the fixed scroll of fig. 4.
Fig. 6 is a front view illustrating a rough machining, finishing and chamfering step of a wrap in the scroll manufacturing method of fig. 5.
Fig. 7 is a bottom view showing the cutting tool of fig. 6.
Fig. 8 is a diagram comparing cutting edges in the cutting tool of fig. 6.
Description of the reference numerals
100: the scroll compressor 130: rotary scroll
132: rotating the end plate 134: rotary scroll
140: fixed scroll 142: fixed end plate
144: fixed scroll 146: annular wall
148: interference prevention unit 148a: lower surface
148b: upper surface 148c: step surface
200: cutting tool 210: tool shaft
220: cutting edge 222: first cutting edge
222a: first portion 222b of first cutting edge: second part of the first cutting edge
224: second cutting edge 224a: 2 nd-1 th cutting edge
224aa: first portion of cutting edge 2-2 224ab: second part of 2 nd-2 nd cutting edge
224b: 2 nd-2 nd cutting edge 224ba: 2 nd-2 th cutting edge first part
224bb: second portion 225bc of 2 nd-2 nd cutting edge: third part of 2 nd-2 nd cutting edge
θ 1, θ 21, θ 22: the angle between the first and second portions
θ 23: the angle between the second and third portions
Detailed Description
Hereinafter, a scroll compressor, a cutting tool, and a scroll manufacturing method according to the present invention will be described in detail with reference to the accompanying drawings.
Fig. 3 is a sectional view illustrating a scroll compressor according to an embodiment of the present invention, fig. 4 is a perspective view illustrating a fixed scroll in the scroll compressor of fig. 3, fig. 5 is a flowchart illustrating a scroll manufacturing method for manufacturing the fixed scroll of fig. 4, fig. 6 is a front view illustrating a rough machining, finishing and chamfering step of a wrap in the scroll manufacturing method of fig. 5, fig. 7 is a bottom view illustrating a cutting tool of fig. 6, and fig. 8 is a view comparing cutting edges in the cutting tool of fig. 6.
Referring to fig. 3, the scroll compressor 100 according to the present embodiment may include: a housing 110; a motor 120 disposed inside the housing 110; a rotary scroll 130 receiving power from the motor 120 to perform a rotational motion; a fixed scroll 140 fixed to the housing 110 and forming a compression chamber together with the rotary scroll 130; and an inverter 150 for controlling the motor 120.
The housing 110 may include: a rear housing 112 having a discharge chamber for receiving the refrigerant discharged from the compression chamber and fixed to one side of the fixed scroll 140; a center housing 114 fixed to the other side of the fixed scroll 140 and supporting the rotary scroll 130; a motor housing 116 fixed to the center housing 114 and accommodating the motor 120; an inverter case 118 fixed to the motor case 116 and accommodating the inverter 150; and an inverter cover 119 fixed to the inverter case 118 and covering the inverter 150.
The motor 120 may include: a stator 122 fixed inside the motor case 116; a rotor 124 located inside the stator 122 and rotated by interaction with the stator 122; and a rotating shaft 126 connected to the rotor 124 and rotating together with the rotor 124.
The rotary scroll 130 may include: a disk-shaped rotating end plate 132; a spiral wrap 134 protruding from the center of the rotating end plate 132 toward the fixed scroll 140; and a boss portion 136 protruding from the center of the rotating end plate 132 to an opposite side of the orbiting scroll 134 and into which the rotating shaft 126 is inserted.
As shown in fig. 4, the fixed scroll 140 may include: a fixed end plate 142 facing the rotating end plate 132; a fixed scroll 144 protruding from the center of the fixed end plate 142 in the direction of the orbiting scroll 130 and engaged with the orbiting scroll 134; and an annular wall 146 protruding from an outer circumference of the fixed end plate 142 in a direction of the orbiting scroll 134 and surrounding the fixed scroll 144.
Here, the annular wall 146 includes a interference prevention unit 148, the interference prevention unit 148 preventing a distance from the fixed wrap 144 from being less than a predetermined value (a rotation diameter of the cutting tool 200 described later), and the interference prevention unit 148 may include: a lower surface 148a facing the fixed tray 142; an upper surface 148b facing the fixed scroll 144 and located radially outward of the lower surface 148 a; and a step surface 148c located between the lower surface 148a and the upper surface 148 b.
The inverter 150 may include a substrate on which various elements required for controlling the inverter are mounted.
Meanwhile, the fixed scroll 140 and the rotary scroll 130 may be manufactured by a scroll manufacturing method shown in fig. 5.
Specifically, the scroll manufacturing method according to the present embodiment includes: step 1 NS1, machining the rear part of the scroll (the part not facing the compression chamber), step 2, machining the front part of the scroll (the part facing the compression chamber); and a 3 rd step NS3 of machining a hole of the scroll, wherein the 2 nd step NS2 may include: 2-1 step NS21, rough machining the front part; and 2-2 nd step NS22 of performing rough machining, finish machining, and chamfering on the scrolls (the orbiting scroll 134, the fixed scroll 144).
In addition, the orbiting scroll 130 is machined at the rear portion of the orbiting scroll 130 in the 1 st step NS1, rough machined at the front portion of the orbiting scroll 130 in the 2 nd-1 st step NS21, and rough machined and finish machined at the outer and inner peripheral surfaces of the orbiting scroll 134 in the 2 nd-2 nd step NS22, so that the front end edge of the orbiting scroll 134 may be chamfered.
Further, the fixed scroll 140 is machined at the rear portion of the fixed scroll 140 in the 1 st step NS1, rough machined at the front portion of the fixed scroll 140 in the 2 nd-1 st step NS21, and rough machined and finish machined at the outer and inner circumferential surfaces of the fixed wrap 144 in the 2 nd-2 nd step NS22, so that the front end edge of the fixed wrap 144 can be chamfered.
Here, in the 2 nd-2 nd step NS22, the cutting tool 200 shown in fig. 6 to 8 may be used.
Specifically, referring to fig. 6 to 8, the cutting tool 200 according to the present embodiment may include: a rotatable tool shaft 210, and a cutting blade 220, the cutting blade 220 being mounted on an outer circumferential surface of the tool shaft 210 and processing the scroll.
The tool shaft 210 may extend in a direction parallel to the rotation shaft 126, and be formed to rotate based on an axis parallel to the rotation shaft 126.
The cutting edge 220 may include a first cutting edge 222 and a second cutting edge 224 formed in different shapes from each other to reduce a machining load and improve the ease of manufacturing the cutting edges.
The first cutting edge 222 may include: a first portion (hereinafter, referred to as 1 st-1 st portion 222 a) processing an outer circumferential surface and an inner circumferential surface of the wrap; and a second portion (hereinafter, referred to as a 1 st-2 nd portion 222 b) obliquely extending from the 1 st-1 st portion 222a to process a front end edge of the wrap.
The second cutting edge 224 may include: a first portion (hereinafter, referred to as 2-1 th portions 224aa and 224 ba) processing an outer circumferential surface and an inner circumferential surface of the wrap; and a second portion (hereinafter referred to as 2-2 portions 224ab and 224 bb) that extends obliquely from the 2-1 portions 224aa and 224ba to machine a leading edge of the scroll.
Here, the axial lengths of the 2-1 th parts 224aa and 224ba are formed to be longer than the 1-1 st part 222a, and the angles θ 21 and θ 22 between the 2-1 th parts 224aa and 224ba and the 2-2 th parts 224ab and 224bb may be formed to be smaller than the angle θ 1 between the 1-1 st part 222a and the 1-2 nd part 222 b.
In addition, the first cutting edge 222 and the second cutting edge 224 are respectively formed in plural numbers, and the plural first cutting edges 222 and the plural second cutting edges 224 may be alternately arranged with each other along the circumferential direction of the tool shaft 210.
In addition, one of the plurality of second cutting edges 224 may be formed to increase the life of the cutting tool 200 by removing the burr of the front end of the wrap.
That is, the plurality of second cutting edges 224 may include: at least one 2-1 cutting edge 224a having said 2-1 part 224aa and said 2-2 part 224ab; and a 2-2 cutting edge 224b including the 2-1 st portion 224ba, the 2-2 nd portion 224bb, and a third portion (hereinafter referred to as the 2-3 rd portion 224 bc) extending obliquely from the 2-2 nd portion 224bb to remove the burr of the front end of the wrap.
Here, the angle θ 23 between the 2-1 th part 224ba and the 2-3 rd part 224bc may be formed to be smaller than the angles θ 21 and θ 22 between the 2-1 th parts 224aa and 224ba and the 2-2 th parts 224ab and 224 bb.
Hereinafter, effects of the scroll compressor 100, the cutting tool 200, and the scroll manufacturing method according to the present embodiment will be described.
That is, when the power is applied to the motor 120, the rotary shaft 126 rotates together with the rotor 124, and the rotary scroll 130 rotates by receiving the rotational force from the rotary shaft 126, so that the refrigerant is sucked and compressed into the compression chamber and then discharged to the discharge chamber.
Here, according to the scroll compressor, the cutting tool 200, and the method of manufacturing a scroll of the present embodiment, since the annular wall 146 includes the interference preventing unit 148, the weakening of the rigidity of the annular wall 146 is minimized while the cutting tool 200 having the 1 st portion (the 1 st-1 st portion 222a, the 2 nd-1 st portions 224aa and 224 ba) and the second portion (the 1 st-2 nd portion 222b, the 2 nd-2 nd portions 224ab and 224 bb) can be used. In addition, since the cutting tool 200 is used, the number of processes of the second step NS2 can be reduced. That is, the rough machining, the finish machining, and the chamfering of the scrolls may be performed in one process with one tool. Therefore, the manufacturing time and manufacturing cost of the scroll can be reduced, and the chamfer dimension management of the lap becomes easy.
Meanwhile, in the present embodiment, the third portion for removing the burr of the tip of the wrap is formed on the one 2 nd-2 nd cutting edge 224b, but is not limited thereto.
That is, the third portion may also be formed on at least one 2 nd-1 st cutting edge 224 a. However, in this case, since the manufacturing cost of the cutting tool 200 increases and the burr can be sufficiently removed even if only one third portion is provided, it is preferable that the third portion is formed only on the one 2 nd-2 nd cutting edge 224b as in the present embodiment.
In addition, the third portion may be formed on the first cutting edge 222. However, in this case, since the radial projection length of the third portion becomes long, the rigidity of the third portion may be weakened and damage may occur, and therefore, it is preferable that the third portion is formed on the one 2 nd to 2 nd cutting edge 224b as in the present embodiment.

Claims (8)

1. A scroll compressor, comprising:
a rotary scroll receiving power to perform a rotational motion; and
a fixed scroll forming a compression chamber together with the rotating scroll,
wherein the fixed scroll includes:
a fixed end plate formed in a disc shape;
a fixed scroll protruding from a center of the fixed end plate in a direction of the orbiting scroll; and
an annular wall protruding from an outer circumference of the fixed end plate in a direction of the rotary scroll, wherein the annular wall includes a tamper prevention unit,
the interference preventing unit includes: a lower surface; an upper surface facing the fixed wrap and located radially outward of the lower surface; and a step surface located between the lower surface and the upper surface,
the interference preventing unit is formed to prevent a distance from the fixed wrap from being less than a predetermined value.
2. A cutting tool, comprising:
a rotatable tool shaft; and
a cutting blade installed at an outer circumferential surface of the tool shaft and processing a fixed wrap of the scroll compressor according to claim 1,
wherein the cutting edge includes: a first portion processing an outer circumferential surface and an inner circumferential surface of the fixed scroll; and a second portion obliquely extending from the first portion to process a front end edge of the fixed wrap.
3. The cutting tool of claim 2,
the cutting edges include a first cutting edge and a second cutting edge formed in different shapes from each other,
the first portion of the second cutting edge is formed longer than the first portion of the first cutting edge,
the angle between the first and second portions of the second cutting edge is smaller than the angle between the first and second portions of the first cutting edge.
4. The cutting tool of claim 3,
the first cutting edge and the second cutting edge are respectively formed in plurality,
the plurality of first cutting edges and the plurality of second cutting edges are alternately arranged with each other along a circumferential direction of the tool shaft.
5. The cutting tool of claim 4,
one of the plurality of second cutting edges further includes a third portion extending obliquely from the second portion to remove a front end burr of the fixed wrap.
6. The cutting tool of claim 2,
the cutting edge further includes a third portion extending obliquely from the second portion to remove a leading end burr of the fixed wrap.
7. The cutting tool according to claim 5 or claim 6,
an angle between the third portion and the first portion is formed smaller than an angle between the second portion and the first portion.
8. A method of manufacturing a scroll plate, comprising:
a step of roughly machining a front portion of a fixed scroll of the scroll compressor according to claim 1; and
performing rough machining, finish machining and chamfering on the fixed scroll of the fixed scroll,
wherein the rough machining, the finish machining, and the chamfering of the fixed wrap are performed by one process using one cutting tool.
CN202110126545.7A 2020-01-31 2021-01-29 Scroll compressor, cutting tool, and method of manufacturing scroll Active CN113202748B (en)

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