JPS6156866A - Polishing device - Google Patents

Abstract

PURPOSE:To enable a device to high accurately polishing a surface even if it is complicated, by elastically supporting one of the paired workpieces fitted and brought into slide contact rotating at a low speed with a large radius and rotating the other workpiece, while it is forced to be brought into pressure contact with the former workpiece, at a high speed with a small radius so as to slide the workpiece with each other. CONSTITUTION:After a lapping agent is applied to the external surface of a stationary blade 5a and a moving blade 5b, the stationary blade 5a is secured to a surface plate 11, and if a boss part 66 of the moving blade 5b is fitted to be fixed to a holder 67, the moving blade 5b is fitted to the stationary blade 5a, and a polishing device brings into a slide contact an internal wall surface of the stationary blade 5a with an external wall surface of the moving blade 5b, an end surface of the stationary blade 5a with a bottom surface of the moving blade 5b and a bottom surface of the stationary blade 5a with an end surface of the moving blade 5b. Next the device, starting a motor 17, 46, rotates an eccentric turning unit 27 and the surface plate 11 around an axial line 34 while the holder 67 around an axial line 59. That is, the device, giving a rotation at a low speed with a large radius to the stationary blade 5a while at a high speed with a small radius to the moving blade 5b, accurately laps the internal wall surface of the stationary blade 5a and the external wall surface of the moving blade 5b by the lap pressure by a tension spring 32 while the end and bottom surface of the both blades by the lap pressure by a weight 65 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a polishing apparatus suitable for manufacturing scrolls of scroll fluid machines used in compressors, expanders, etc.

[Technical background of the invention and its problems]

The operating principle of a scroll compressor is explained with reference to Fig. 5. When two scrolls (volume plates (1) and (2) are arranged at different angles and interlocked with each other, both scroll plates (1) and (2) ) A limited space (3) is formed between the contact parts. Now, one spiral plate (1) is connected to the other spiral plate (2), and the center α of one spiral plate (1) is When the spiral plate (1) is moved while inhibiting its rotation so as to revolve at O-0', the volume of the limited space (3) gradually decreases.

@5 From the state shown in Figure (5), the revolution angle of the spiral plate (1) is 90'
The figure (B) shows 180°, the figure (q) shows 270', and the figure ('D) shows 270'.
The volume of the space (3) thus limited gradually decreases.

In (5), which has been rotated 360 degrees, the rain spaces have been moved to the center, connected to each other, and further moved in 90 degree increments.
Q.

(As shown in DJ, the space is pinched and becomes almost zero in the same figure). During this time, the outer space that began to open in the same figure (Bl) moves from (CI, CDI) to (8) in the same figure, creating a sealed space that takes in a new fluid. Therefore, this spiral plate CI), (2) If sealed disk-shaped side plates are provided at both ends in the axial direction, and a discharge hole as shown in (4) in Fig. 5 is provided in the center of one side plate, the driftwood taken in from the outside in the radial direction can be removed. is compressed and discharged from the discharge hole (4).

By the way, conventionally, the spiral plates (1) and (2
) was obtained by cutting a cast material with an end mill using a numerically controlled (NC) machine tool.

However, the machining allowance from the cast material is usually quite large at 1.5 tones, which lengthens production time and lowers production efficiency. Not only that, but tools wear out during cutting, making tool management extremely complicated to maintain a certain level of machining accuracy. had become a barrier.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polishing apparatus that can finish finishing a pair of mutually fitted bodies with high precision.

[Summary of the invention]

Of a pair of workpieces that fit into each other and slide relative to each other, one workpiece is elastically supported so as to be able to return to its original position and rotated at low speed. By applying pressure to the workpiece and making small turns at high speed,
They are polished by rubbing them together.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the polishing apparatus of this embodiment.

This polishing device includes a first holding part (6) that holds a static J4 (5a) for a scroll fluid machine shown in FIG. (5a
), and a second holding part (7) that fits into C3a) and holds the pair of rotor blades (5b);
a first swing drive part (8) that gives an eccentric swing movement of, for example, 8 degrees of eccentricity and a rotational speed of 1 rotation per minute to the static M (5a) held in the holding part (6) of the The holding part (
7) The dynamic g held in (5b) (see Figure 3)
For example, the amount of eccentricity is 0.5 to 2 ffl+! 1 and the second rotational speed gives an eccentric rotation (revolution) motion of 1500 revolutions per minute.
The rotation drive part (9) is made up of a ratchet. However, the first
The holding part (6) consists of a box-shaped support part (10a) with a base 0Q attached to the upper part, a cylindrical surface plate housing to which the stationary blade (5a) is fixed on the upper surface, and this surface plate ( Lower part of 111 and base α
A plate-shaped holding plate a3 is interposed between the surface plate OD and the surface plate OD to maintain the Ill relationship, and a plate-like holding plate a3 is disposed between the surface plate OD and the surface plate OD. 111)... The holding plate a3 is formed into a disk shape, and circular holes for holding the spheres 02... are drilled in a uniformly distributed manner. Holding plate α3 and sphere (c)...
· is housed in a fitting recess αeK provided at the bottom of the surface plate (111).The depth of this fitting recess a8 is equal to that of the sphere (2).
The diameter of the sphere 0 is set smaller than that of the sphere 0, and the sphere 0 partially protrudes from the lower end surface of the surface plate (111).

Roughly speaking, the first rotation drive unit (8) includes an elastic support mechanism (8a) that elastically supports the surface plate aυ, and a large rotation imparting mechanism that drives the elastic support mechanism (8a) to eccentrically rotate (revolution). It consists of (8b). And the large turning mechanism (8
b) consists of a cylindrical mounting body αG fixed to the inner bottom surface of the support part (10a), a motor αG mounted on the outer wall of this mounting body αG, and a motor αG mounted coaxially to the upper end of the mounting body αQ. a bearing body (16a), a transmission shaft 08 rotatably supported by this bearing body (16a), a pulley 09 mounted on the lower end of the transmission shaft θB, and a ring mounted on the rotating shaft (■) of the motor αη. The belt (c) is wound between the pulleys α9 and 91 through the window formed on the side of the mounting body Oe, and the axis is perpendicular to the upper end of the transmission shaft 08. A bolt Q = 9 is threaded through the bolt Q = 9, and an eccentric transmission shaft @ is screwed on both sides of this bolt Q, and the eccentric transmission shaft @ is fitted coaxially to the upper end of the shaft and rotates. Eight freely pivoted arms (
26) A disc-shaped eccentric rotating body @ is formed by projecting upwardly, and an arm portion (7) of this eccentric rotating body (a) is provided outwardly protruding from the upper end. A plurality of spheres are interposed between the lower surface of the flange (c) and the upper surface of the base αQ to be able to roll freely at fixed positions via cages (not shown). It consists of In addition, the elastic support mechanism (8a)
8 pillars (to) are arranged equally on the upper surface and protrude upward, and these pillars ω are horizontally installed so as to face the protrusions I... Piece 6...and these protruding pieces I
..., (31) ... consists of eight tension springs (to) ... stretched between them. Then, the axis (G) of the eccentric transmission shaft (to) and the axis (■) of the transmission shaft (to) are set to be parallel, and by screwing with the bolt (c), the amount of eccentricity can be reduced to, for example, 8 questions. It is adjustable. The arm part @... passes freely through the base σ0 1)
It protrudes upward. Therefore, the arms @... are not interfered with by the base αO even during eccentric rotation and revolution. Furthermore, on the bottom surface of the flange (to)... there is a recess (to),
... is provided, and a sphere (support) ... is provided in this recess ■...
is designed to be stored. The depth of this recess is smaller than the diameter of the sphere, and the depth of this recess is smaller than the diameter of the sphere.
A part of the flange protrudes from the lower end surface of the flange (end). The eccentric rotating body (c) is a sphere)
It is vertically installed on the base 00 so as to be able to slide freely on the base aO via the base aO. Thus, the rotation of the motor α force is Boo IJI21)
, the belt (C), the pulley 09, and the transmission shaft αe to the eccentric transmission shaft (C). This eccentric transmission shaft (to) is eccentric by an amount of eccentricity c1, so it rotates around the axis (to) and revolves around the axis c3. The movement of this eccentric transmission shaft is transmitted to the eccentric rotating body. However, since this eccentric rotating body @ is coaxially attached to the eccentric transmission shaft, only the revolution motion around the axis, that is, the eccentric rotation motion is transmitted. However, the eccentric rotating body (
The movement of a) is carried out via the tension spring ■...
It is transmitted to l.

However, this surface plate (II) has a tension spring G2)...
Since the surface plate (11)K is elastically supported by J':F, a force acts in a direction to return it to the original position.

On the other hand, the second swing drive section (9) has a transmission shaft (to) and is connected to the second holding section (7) to perform a small swing imparting mechanism (a) that performs eccentric swing (revolutionary movement). , a rotational drive mechanism (to) that rotates the transmission shaft (to), and a pressurizing mechanism (a) to press the rotor blade (5b) against the stator blade ('5a) with a constant load. .However, the rotational drive mechanism ■ is connected to the column 60 erected on the base αQ and to this column)
The support head (42) is fitted to be able to move up and down in the direction of the arrow (411), and the support plate (42) installed horizontally at the upper end of the column uO.
3, the axial direction is the arrow (4υ direction), and the upper end is rotatably supported by the support plate (4:5) and the support head (42
The height adjustment screw (44) screwed into the handle (44), which is connected to the upper end of this height adjustment screw IA4J, and which adjusts the height of the support head (421) by screwing this adjustment screw (4)
4, a support head (a motor (4e) attached to the rear end of the column OO side of the 4), and a cylinder supported so that the axis is in the direction of the arrow (4υ) at the front end of the support head (4). A shaped sleeve (41), a boo IJ (481) ringed at the upper end of this sleeve (47), and a sleeve +471
A pair of splines (49) fitted into t (49)
, motor (rotating shaft of J (boo IJ mounted on 50)
151) and a bell (bell) f53 wrapped between Boo (IJ I<tlh 5t1). However,
The small turning mechanism (a) is spline +41t f41
The transmission shaft (c) is meshed with the transmission shaft (7), the bolt (to) is threaded through the lower end of the transmission shaft (7) so as to cross the axis at right angles, and the bolt (f53) is threaded on both sides. The combined cylindrical eccentric transmission shaft (53a) is fitted externally between the transmission shaft (to) the bolt 53) and the support head (42), and is supported and hung vertically, surrounding the eccentric transmission shaft (53a). A cylindrical support body (5 forces, a support head (a rod-shaped locking body 65 hanging from the 4 sides), and a protrusion 66 protruding from the outside of the support body 64) stands upward. The support body (54) is provided with a rotation stopper/6η which is slidably fitted in the locking body 15 in the direction of the arrow (41) and prevents the support body (54) from turning. The meshing portion of the transmission shaft (7) with the spline (491+ (4LjI) is formed on the spline shaft.
The axis 6Fj of the eccentric transmission shaft (53a) and the axis 6Fj of the transmission shaft (7) (5 are set parallel to each other, and the bolt 6
3) by screwing the eccentricity e2, for example 0.5~
It can be adjusted to 2rran. Further, a flange portion (60) is provided protruding from the inner side of the lower end portion of the support body 54. On the other hand, a cylindrical load platform 16υ is externally fitted and supported on the upper end of the knee 1 transmission shaft (7), and the upper end of this load platform (6I) projects approximately coaxially. The arrow (41) indicates the installed locking column, the support head (column section F63 erected adjacent to the transmission shaft (toward)), and the load sum +61 attached to this column section C631. There is a locking pin ((b) that can be locked so that it can be raised and lowered in the
It consists of a weight field that is held in place by two and placed in multiple stages. Furthermore, the first holding part (6) has a cylindrical holding body (6η) into which the boss part +6El of the rotor blade (7) is coaxially fitted at the lower end. )
An annular recess ridge is provided on the outer periphery of the recess, and the flange (60) of the support body (5J) is loosely inserted into the recess side. The ceiling and flange (the lower surface of J and the bottom of the concave side have a sphere...
A plurality of are interposed so as to be freely transferable in the circumferential direction. Therefore, these spheres (69 are vertically disposed on the holder (6η is the support r54), and are slidable in a direction perpendicular to the axis □□□.
The inner end of 7) is coaxially fitted into the lower end of the eccentric transmission shaft (53a) and rotatably supported. Further, at the lower end of the holding body 54), a supporting body I! 54) A rotation stopper (a locking member 64) installed horizontally on one of the mounting heads protruding downward is loosely inserted to prevent rotation while allowing the holder 64 to revolve. Thus, the rotation of the motor (40) is transmitted to the transmission shaft (to) via the pulley 6υ, the belt (5a, the pulley, the sleeve lAη, and the spline (4ω). When the rotation of the eccentric transmission shaft (53a) is transmitted to the eccentric transmission shaft (53a),
53a) is eccentric by the amount of eccentricity e2, so 111
It revolves around the line and rotates around the axis. The movement of this eccentric transmission shaft (64) is transmitted to the holding body (6η. However, this holding body r671
Since it is coaxially mounted to the axis 591, only the revolution movement around the axis 591, that is, the eccentric rotation (to) Y movement is transmitted. In addition, the constant load of the weights □□□...
The pressure is applied to the stationary blade (5b) as a wrap pressure through the pressure.

Next, the operation of the polishing apparatus having the above configuration will be described.

First, a lapping agent such as diamond abrasive grains is applied to the outer surfaces of the static R (5a) and the dynamic g (sb). Next, the stationary blade (5a) is fixed to a predetermined position on the surface plate (111) using a fastener (not shown). Also, the boss part tGe of the rotor blade (5b) is fitted to the lower end of the holder <67. - While fixing, as shown in Fig. 4, fit the rotor blade (5b) into the stud R (5a). As a result, the inner wall surface ('7) of the stationary blade (5a) comes into sliding contact with the outer wall surface (73) of the rotor blade (5b).
The tip surface (7(a) of the stator blade (5a) is in sliding contact with the bottom surface (79) of the rotor blade (5b), and also contacts the bottom surface (7e) of the stator blade (5a).
is in sliding contact with the tip surface ση of the rotor blade (5b). However,
When the motors αη and (4) are started, the eccentric rotating body (c) and the surface plate (1) elastically supported by the eccentric rotating body (a)
1) revolves around the axis ■ in the direction of the arrow, for example, at 1 rotation per minute with a rotation radius of 8 fins, and the holding body (6
η rotates around the axis in the direction of the arrow 179'' at, for example, 1500 revolutions per minute with a rotation radius of 0.5 to 2 degrees.In other words, the static g(5a) is given a low-speed hole turning motion, and The rotor blade (5b) is given a high-speed small turning motion.Thus, the tension spring ■... exerts a force on the inner wall surface that returns the displacement of the surface plate I caused by these turning movements to its original position. It acts as a lap pressure on the outer wall surface 173) of σ, and this lap pressure wraps the inner wall surface σ2 and the outer wall surface 173) which are in sliding contact with each other. The load lodged below the axis 1 of 6 also acts as lap pressure, and this lag pressure causes the tip surfaces σ and ση and the bottom surface f, which are in sliding contact with each other, to
f5), +76) are wrapped.

Thus, in the gambling machine of this embodiment, polishing is performed by rubbing the stationary blade (5a) and the rotor blade (5b), so that the machining errors in the previous machining process are mutually compensated for and the inner wall surface r72 is polished. The processing accuracy of the curvature accuracy of the outer wall surface (73) and the flatness of the top surface (I9.4) and the bottom surface (I9. This can help improve the performance of

In the above embodiment, static IK (5a
) is held on the holder (67), but the surface plate (111) may hold the movable g (5b), and the holder (6η) may hold the stationary blade (etc.). Furthermore, the sharpening device of the present invention can be applied to any pair of workpieces that slide into each other.

Furthermore, in the above embodiment, polishing is performed by applying a ramp agent, but it is also possible to fix diamond abrasive grains to either the movable B (5b) or the stationary blade (5a) and use this together as a tool. You can achieve a similar effect.

〔Effect of the invention〕

The polishing device of the present invention polishes a pair of workpieces that fit and slide together by sliding them together, so machining errors in the pre-machining process can be mutually resolved in a mutually complementary manner, even on complex machining surfaces. Can be polished with high precision. Therefore, it is possible to contribute to improving the performance of a machine equipped with parts manufactured by this polishing apparatus.

[Brief explanation of the drawing]

FIG. 1 is a 9-sectional view of a polishing apparatus according to an embodiment of the present invention, and FIG.
Figure 3 and Figure 3 are respectively perspective views of the stator blades and the riser polished by the starting device in Figure 1, Figure 4 is an enlarged view of the vicinity of the surface plate in Figure 1, and Figure 5 is a view of the scroll compressor. It is a diagram showing the principle of operation. (5a): Stationary blade (first workpiece) (5b): Rise (second workpiece) 16): First holding part (7): Second holding part (8)
:First swing drive unit (9):Second swing drive unit aQ: Gain (ID second surface plate (8a):Elastic support mechanism (8b):Large swing imparting mechanism @:Small swing imparting mechanism C):Application Pressure mechanism agent Patent attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A polishing device characterized by having the following configuration. (a) A first holding section having a surface plate on which a first workpiece is held and a base on which the surface plate is slidably placed. (b) An elastic support mechanism that elastically supports the surface plate along the base so that it can be returned to its original position; A first swing drive unit comprising a large swing imparting mechanism that is driven to revolve. (c) A second holding part that holds a second workpiece that is slidably fitted into the first workpiece. (d) a small turn imparting mechanism that is connected to the second holding part and has a smaller orbital radius than the large turn imparting mechanism and is driven to revolve around an axis of revolution that is substantially perpendicular to the top surface of the base at high speed; a second swing drive section having a pressurizing mechanism that presses a second workpiece held by the second holding section against the first workpiece;