JPS60201819A - Working of cylinder vane for rotary compressor - Google Patents

Abstract

PURPOSE:To roughly finish a vane groove by turning a supersonic-wave broach by the deflection angle in the direction of the revolution which is formed by the both center lines of the supersonic-wave broach and the vane groove and carrying-out positioning by shifting a compressor cylinder by the amount of center deflection between the both. CONSTITUTION:A pallet 3 onto which a rotary compressor cylinder 1 which is roughly finished in a finishing unit 21 is loaded and fixed is held, and a tool revolving motor 9 and a pallet holding motor 12 are revolved by the instruction supplied from a control box 16 into which the revolution-direction shift angle theta and the center deflection amoung DELTA which are calculated in the rough finishing unit 20 are input, and each relative position of a supersonic-wave broach 5A and a vane groove 2 is allowed to coincide, and the deflection amount becomes zero, and finishing work is carried-out by the broach 5A.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for machining cylinder vane grooves for rotary compressors, and particularly relates to a method for machining cylinder vane grooves for rotary compressors. The present invention relates to a method for finishing vane grooves of rotary compressor cylinders with high precision.

[Background of the invention]

First, a rotary compressor cylinder to which the present invention is applied will be explained.

FIG. 1 is a plan view showing a rotary compressor cylinder to which the present invention is applied. In this Figure 1, 1
is a cylinder for a rotary compressor made of sintered metal, in which a vane groove 2 having two side walls parallel to each other and facing each other is bored in the inner circumferential surface. It is something to do.

By the way, in general, in conventional broaching, the method of positioning a workpiece is to provide a workpiece mounting jig with a mounting reference surface in the X and Y directions, and position the workpiece by pressing the workpiece against this mounting reference surface. . During broaching, the workpiece is fixed to the workpiece mounting jig using a presser metal fitting so that the workpiece does not move due to the cutting resistance of the broach.

However, when mass-producing the vane groove 2 of the cylinder 1 for a rotary compressor, which is the object of the present invention, by broaching the entire groove, which uses the inside of the vane groove 2 as a sliding surface and requires a relatively high-precision gap. Since each workpiece has variations in dimensions, the conventional method of positioning by pressing it against the mounting reference plane in the X and Y directions causes variations in the dimensions between the center of the vane groove 2 and the center of the ultrasonic broach, resulting in high The drawback was that precise groove machining was not possible.

[Purpose of the invention]

An object of the present invention is to provide a method for machining cylinder vane grooves for a rotary compressor, which eliminates all of the drawbacks of the prior art described above and enables highly accurate machining of vane grooves.

[Summary of the invention]

The configuration of the rotary compressor cylinder vane groove machining method according to the present invention is supplied to a machining unit. A cylinder for a rotary compressor in which a vane groove having two parallel and opposing side walls is bored in the inner circumferential surface,
In a cylinder vane groove machining method for a rotary compressor in which the vane groove is finished by an ultrasonic broach, the rotational direction deviation angle between the center line of the ultrasonic broach and the center line of the vane groove, and the center line of the ultrasonic broach The total amount of misalignment between the center of the vane groove and the center of the vane groove was measured, and alignment was performed by rotating the ultrasonic broach by the rotational direction misalignment angle and moving the rotary compressor cylinder by the amount of misalignment. Afterwards, the vane groove is finished by the ultrasonic broach.

More details are as follows.

The relative position between the ultrasonic broach, which is a tool, and the vane groove side wall of a rotary compressor cylinder, which is a workpiece, is detected by an electric micrometer associated with a position detection device, and the rotational direction deviation angle θ and center deviation amount Δ between the two are completely measured. . Then, the deviation in the rotational direction is corrected by fully rotating the ultrasonic broach to align it with the vane groove, while the center of the ultrasonic broach and the center of the vane groove are aligned by moving the pallet on which the rotary compressor cylinder is placed. I did it like that.

In addition, when finishing processing using an ultrasonic broach is performed in two steps: rough finishing processing in a rough finishing unit and finishing processing in a finishing unit, the position detection device attached to the rough finishing unit is used to detect the position of the unit. The relative position between the ultrasonic broach and the vane groove side wall of the rotary compressor cylinder is measured, and the results are fed back to the finishing unit to remove the ultrasonic broach of the unit and the rotary compressor cylinder transported to this unit. By performing alignment with the side wall of the vane groove, alignment can be performed using a single position detection device.

[Embodiments of the invention]

Hereinafter, the present invention will be explained by examples.

FIG. 2 is a schematic perspective view showing a vane groove finishing device used for implementing a cylinder vane groove machining method for a rotary compressor according to an embodiment of the present invention, and FIG. 3 is a rough-finishing device in FIG. 2. Fig. 4 is an enlarged perspective view of the main part showing the state of processing by the ultrasonic broach of the unit. Fig. 4 is a schematic diagram for explaining the entire method of detecting the relative position between the ultrasonic broach and the side wall of the vane groove. Fig. 5 is , are principal plane factors showing the rotational direction deviation angle θ and the center deviation amount Δ between the ultrasonic broach and the side wall of the vane groove.

First, the entire configuration of the vane groove finishing apparatus according to this embodiment will be explained using all of FIGS. 2.3.

3 is a pallet on which the entire rotary compressor cylinder 1 is placed and fixed with a tapered top 4 fixed thereon;
This pallet 3 is carried by a feed cylinder (not shown) on a rail 22 with a rotary compressor cylinder 1, which is a workpiece, mounted and fixed thereon.

20 is the vane m of the rotary compressor cylinder 1
Rough finishing unit (details will be described later), 21
is a finishing unit that further finishes the vane groove 2 that has been roughly finished by this rough finishing unit 20 (details will be described later)
, 6 are the ultrasonic broach 5 (details will be described later) attached to the rough finishing unit 20 and flj'& of the vane groove 2.
17 is a method for detecting the relative position between the ultrasonic broach 5 and the side wall of the vane groove 2 by processing all the detected values by the position detecting device 6 (to be described later). An amplifier 16 calculates the rotational direction deviation angle θ and the misalignment amount Δ (the calculation method will be described later) between the rotational direction deviation angle θ and the misalignment amount Δ? With a large input, the tool rotation motor 9 of the rough finishing unit 20 and finishing unit 21 is fully rotated through the driver 1B'i so that the rotation direction deviation angle θ becomes 0, and the center deviation amount Δ becomes 0. This is a control box that rotates the pallet clamping motor 12 of the rough finishing unit 20 and finishing unit 21.

To explain the tool side of the rough finishing unit 20, 7 is an ultrasonic head supported by a head support (not shown) and vibrates at a constant Hertz; 5 is attached to the lower end of this ultrasonic head. 9 is a tool rotation motor for giving rotation to this ultrasonic broach 5 via a reducer 8 (rotation for correcting the rotational direction deviation angle θ); 10 is a tool rotation motor for this tool; This is an encoder for monitoring the rotation of the rotation motor 9. If you explain everything on the work side,
14 is a hydraulic cylinder; 19 is a screw that moves forward and backward by the rotation of the pallet clamping motor 12 via the reducer 11; the pallet 3 is clamped between the tip of this screw 19 and the hydraulic cylinder 14; Since the output of the pallet holding motor 12 is greater than the output of the hydraulic cylinder 14, the rotary compressor cylinder 1
The misalignment amount Δ can be corrected while holding the 13 is a hydraulic cylinder for rapidly moving the screw 19;
Reference numeral 15 denotes an encoder that monitors the entire rotation of the pallet clamping motor 12.

The rough finish of the unit 21 is exactly the same as that of the unit 20, except that the blade thickness of the ultrasonic broach 5A is several micrometers thicker than the blade thickness B of the ultrasonic broach 5 (see Fig. 3, 1). A detection method using the above-mentioned position detection device 6 will be explained using Fig. 4.5.This position detection device 6 detects the positions C('1 + 02) and D (D
L, D! ), and the positions A (A1.'a) and B (B1.'a) of the vane groove 2 of the rotary compressor cylinder 1.
Bt) is detected during use, and these detected values (
'l s 4'), (B,.

Bt), ('1*C1), (D>, D*) are input to the amplifier 17, and the amplifier 17 calculates the rotational direction deviation angle θ and the center deviation amount Δ using the following equations.

θ=(Δ, −Δ1)/L, Δ=(Δ, +Δ,) 72 The entire machining operation by the vane groove finishing machine configured as above will be explained.

Broached rotary compressor cylinder 1
(with a make-up allowance of about 0.2 m) is placed on the pallet 3 and sent to the rough finishing unit 20. The screw 19 is rapidly moved by the hydraulic cylinder 13, and the tip of the screw 19 advances to a position of several tens of micrometers relative to the pallet 3.

This pallet 3 is held by a hydraulic cylinder 14 and a screw 19 rotated by a pallet holding motor 12. From the position detection device 6VC, the ultrasonic broach 5 and the vane of the rotary compressor cylinder 1 @
2 is detected, and this detected amount is input to the amplifier 17 to calculate the rotational direction deviation angle θ and the center deviation scene Δ. Accordingly, the command from the control box 16 causes the tool rotation motor 9 and the pallet clamping motor 12 to rotate so that the rotational direction deviation angle θ and the center deviation amount Δ become 0, and the ultrasonic broach 5 and the vane groove 2 are rotated. The relative positions match and the amount of deviation becomes -0. The ultrasonic broach 5 is connected to the tool upper and lower cylinder (
(not shown), and the vane groove 2 is rough-finished by the ultrasonic broach 5. A feed cylinder (not shown) moves the pallet 3 forward until the ultrasonic broach 5 is removed from the surface of the vane groove 2. The ultrasonic broach 5 is raised to its original position by the tool up/down cylinder, the pallet clamping motor 12 is reversely rotated, and the pallet 3 is released from clamping. The pallet 3 is advanced on the rails 22 by the feed cylinder and is sent to the finishing unit 21. Here, the pallet 3 is clamped in the same manner as in the rough finishing unit 20. The tool rotation motor 9 and the pallet clamping motor 12 are rotated by commands from the control box 16 into which the rotation direction deviation angle θ and center deviation amount Δ calculated by the rough finishing unit 20 are input, and the ultrasonic broach 5A is rotated. The relative positions of the vane groove 2 and the vane groove 2 match, and the amount of deviation becomes 0. Thereafter, finishing is performed by the ultrasonic broach 5Avc in the same manner as the rough finishing unit 20, and the finishing of the rotary compressor cylinder 1 is completed.

This operation is repeated to repeatedly finish the vane groove 2 of the rotary compressor cylinder 1 sent to the rough finishing unit 20.

As described above, according to this embodiment, even if each workpiece (that is, the rotary compressor cylinder 1) has variations in dimensions, the ultrasonic broach 5
Since the relative position between the workpiece and the workpiece is detected and the rotational direction deviation angle θ and the center deviation amount Δ are corrected before machining, high-precision machining is possible.

In addition, the above-mentioned hiθ detected by the rough finishing unit 20,
Δ Since the feed back is made to the finishing unit 21, the ultrasonic broach 5A is used in the finishing unit 21.
Since it is not necessary to detect the entire amount of deviation between the vane groove and the workpiece, there is no need to equip the finishing unit 21 with the expensive position detection device 16, and the unique effect of this embodiment is that the vane groove finishing device becomes inexpensive. be.

In this embodiment, the machining unit is composed of the rough finishing unit 20 and the finishing unit 21, but in the case of the present invention, one machining unit is composed of three or more units. This can also be applied to processing units.

〔Effect of the invention〕

As described above in detail, according to the present invention, it is possible to provide a cylinder vane groove machining method for a rotary compressor, which enables highly accurate machining of vane grooves.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a cylinder assembly for a rotary compressor, which is a subject of the present invention, and FIG. 2 is a vane groove finish used for carrying out a cylinder vane groove machining method for a rotary compressor according to an embodiment of the present invention. FIG. 3 is an enlarged perspective view of the main part showing the processing state by the ultrasonic broach of the rough finishing unit in FIG. 2, and FIG. 4 is a schematic perspective view showing the processing device. FIG. 5, which is a schematic diagram for explaining the entire method of detecting the relative position, is a plan view of a main part showing the rotational direction deviation angle θ and center deviation amount Δ between the ultrasonic broach and the vane-free side wall. 1... Rotary compressor cylinder 2... Vane #1 5.5A... Ultrasonic broach 6... Position detection device 9... Tool rotation motor 12... Pallet clamping motor 16...・Control box 17...Amplifier 20...Rough finishing unit 21・
...Finishing unit θ...Rotation direction deviation angle Δ...
Amount of misalignment Figure 1 Figure 3 Figure 2 Figure 4 Figure 1. . CαJ Figure 5

Claims (1)

[Scope of Claims] “t. More than one vane groove in total of a cylinder for a rotary compressor, which is supplied to a processing unit and has a vane groove formed on the inner circumferential surface thereof having two parallel and opposing side wall metals. In a rotary compressor cylinder vane groove machining method in which finish processing is performed using a sonic broach, the rotational direction deviation angle between the center line of the ultrasonic broach and the center line of the vane groove, and the center of the ultrasonic broach and the center of the vane groove are determined. The amount of misalignment between A cylinder vane groove machining method for a rotary compressor, characterized in that the vane groove is finished by a sonic broach. 2. The machining unit is composed of a rough finishing unit and a finishing unit, and the rough finishing unit is connected to the rotary compressor. With the cylinder supplied, the angle of deviation in the rotational direction and the amount of misalignment are measured, and after positioning and rough finishing are performed based on these measured values, this is supplied to the finishing unit, and the The method for machining a cylinder vane groove for a rotary compressor according to claim 1, wherein the measuring amount is fed back to the finishing unit for positioning and then finishing is performed.