JP2685856B2 - Spiral object processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a helical object used for processing a helical blade used in, for example, a helical blade compressor currently under development. Regarding processing equipment.

(Prior Art) A helical blade used in a helical blade compressor, which has been developed in recent years, has a spiral shape of unequal pitch, as indicated by a in FIG. In order to process the material, the material has been machined from a cylindrical material by a lathe or by injection molding.

When the spiral object is cut out by lathe machining, the tip of the cutting tool must be passed over the entire length of the cylindrical object that is the object to be processed. For this reason, the processing takes time and is not suitable for mass production.

On the other hand, when a spiral product is manufactured by injection molding, the productivity is good, but there are the following drawbacks.

First, the material is limited to flowable plastic materials, which may limit other material properties such as mechanical strength, wear resistance, and corrosion resistance.

Further, since the molten material contracts when it hardens, it is difficult to obtain a spiral material having a precise shape and size.

After the completion of molding, it was very difficult to take out the spiral object without damaging it.

Due to these drawbacks, manufacturing by lathe or injection molding is not suitable as a means for mass-producing helical blades.

(Problems to be Solved by the Invention) Conventionally, a spiral material such as a helical blade of a helical blade compressor has been manufactured by lathe processing and injection molding. However, in the lathe processing, it is necessary to cut over the entire length of the work piece many times, which is not suitable for mass production. In addition, in injection molding, only products with mechanical properties and products with low product precision were obtained, which was not suitable for mass production.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a spiral material processing apparatus suitable for mass production of spiral materials.

[Configuration of the invention]

(Means for Solving the Problem) (1) A holding means for holding a workpiece having a hollow portion formed by an outer shell having a predetermined thickness and a double-edged blade having a cutting depth larger than the predetermined thickness. A cutting blade portion having at least one set of cutting blades, a feeding means for driving the cutting blades in a direction in which a surface to be processed of the workpiece is present, and the cutting blade portion relative to the surface to be processed. And a rolling means for mechanically rolling.

(2) A holding shaft of a holding tool for holding a hollow cylindrical workpiece, a tool shaft provided in parallel with the holding shaft, and a spiral cutting edge portion provided on the peripheral surface of the tool shaft. , A shaft feed means for moving the holding shaft and the tool shaft in a relatively close direction while keeping them parallel to each other to cut the spiral cutting edge portion with respect to the workpiece, and the holding shaft and the tool shaft, respectively. Rolling means for rolling in opposite directions at a predetermined angular velocity are provided, and the cutting blade portion is a cutting blade portion provided with a plurality of pairs of two cutting blades.

(3) A holder that holds a hollow cylindrical workpiece and that has a holding shaft that rotates the workpiece, and a plurality of pairs of cutting blades that are provided in parallel with the holding shaft and that are provided in parallel with the holding shaft. A tool provided with a tool surface having a cutting blade portion provided, and moving the cutting blade portion relatively to the workpiece while keeping the holding shaft and the tool surface parallel to each other to cut the cutting blade portion with respect to the workpiece. A shaft feeding means and a displacing means for displacing the processed surface of the workpiece and the tool surface at a predetermined relative speed in a direction orthogonal to the approach direction are provided.

(Operation) (1) Relative to a work surface of a work having a hollow portion formed by an outer shell having a predetermined thickness, at least one set of two cutting blades is provided. By rotating the cutting blade in the direction in which the surface to be processed of the workpiece exists, the spiral object can be cut out from the workpiece.

(2) Hold a hollow cylindrical workpiece by a holder,
While holding the cutting axis and the tool axis in parallel, the cutting edge section is provided with a plurality of pairs of cutting blades in a spiral two blades provided on the peripheral surface of the tool axis provided parallel to the holding axis of the holder. The workpiece is rotated once relative to the tool axis by moving it relatively close to each other and cutting it into the workpiece, and rotating the holding shaft and the tool shaft in opposite directions at predetermined angular velocities. The spiral object can be cut out by moving it.

(3) A holder that holds a hollow cylindrical workpiece and that has a holding shaft that rotates the workpiece, and a holder that is provided in parallel with the holding shaft and that has a plurality of pairs of two blades. A tool having a tool surface having a cutting edge portion is moved relative to the workpiece while keeping the holding shaft and the tool surface parallel to cut the cutting edge portion with respect to the workpiece, and The spiral object can be cut out by displacing the surface to be processed and the tool surface in a direction orthogonal to the approach direction at a predetermined relative speed.

(Embodiment) A first embodiment of the present invention will be described with reference to the drawings.

First, the basic configuration and operating state of the processing apparatus 1 will be described with reference to FIGS. 1 and 2. The processing apparatus 1 has a holding shaft 3 that holds a cylindrical resin material 2 as a workpiece, and a tool shaft 4 that is provided parallel to the holding shaft 3.
And it has the tool axis | shaft 4 shown by the chain line. The drive system 5 shown by a chain line has a shaft feed mechanism 6 as a shaft feed means for relatively moving the holding shaft 3 and the tool shaft 4 in the approach direction and the retreat direction while maintaining the parallel state. There is. Further, the drive system 5 has a rolling mechanism 7 as rolling means for rolling the holding shaft 3 and the tool shaft 4 in opposite directions to each other, for example, at the same angular velocity.

Further, on the peripheral surface of the tool shaft 4, two spiral cutting blade portions 4a and 4b are integrally formed in a multi-striped state.

A mounting portion 3a for mounting the resin material 2 is formed on the holding shaft 3, and the hollow portion of the cylindrical resin material 2 penetrates the mounting portion 3a of the holding shaft 3. It can be attached with. The resin material 2 is fixed to the holding shaft 3 so as not to move in the circumferential direction and the axial direction.

Processing device 1 on which the resin material 2 is mounted as described above
First, when the shaft feed mechanism 6 is driven, the holding shaft 3 and the tool shaft 4 move in parallel in a direction in which they approach each other, and the cutting blade portions 4a, 4b cut the wall thickness of the resin material 2 into pieces. Get caught. Next, with the inter-axis distance maintained, the rolling mechanism 7 is driven so that the holding shaft 3 and the tool shaft 4 roll in opposite directions. At this time, the respective shafts 3 and 4 are rolled in opposite directions at the same angular velocity. The cutting blades 4a and 4b complete the spiral cut into the resin material 2 when the tool shaft 4 rotates once.

As an example of realizing the above-described operation, there is the processing apparatus 1 shown in FIG. The processing device 1 has a holding shaft 3 and a tool shaft 4. The holding shaft 3 has a mounting portion 3a for mounting the resin material 2 formed on one end side thereof, and the other end side thereof has a shaft feeding mechanism described later. It is held at 6. The shaft feeding mechanism 6 has an arm 8 formed in a substantially U-shape, and bearing portions 9 and 9 are provided at both ends of the arm 8, respectively, and the bearing portions 9 and 9 hold the above-mentioned holding portion. The shaft 3 is rotatably held.

A feed shaft 10 is inserted through the center of the arm 8 in a direction perpendicular to the holding shaft 3 in a penetrating state. A male screw portion 11 is formed at the tip of the feed screw 10,
A nut 13 having a lock nut 12 is screwed into the male screw portion 11 so that the two spacers 14 and 15 sandwich the arm 8.

Further, the base end side of the feed screw 10 is formed with a feed screw portion 16 having an increased diameter in the middle thereof, and the feed screw portion 16 is screwed to the main body 1a of the processing apparatus 1. .
A male screw is not formed in the central portion of the feed screw 10, and the lead screw 10 is inserted into a guide portion 17 formed on the apparatus body 1 side. A drive handle 18 is attached to the base end of the feed screw portion 16.

Further, the mounting portion 3a of the holding shaft 3 has a cylindrical mounting base 3b mounted to the holding shaft 3 formed in a spline shaft shape by a mounting means (not shown).
The mounting base 3a is formed so that the inner peripheral surface fits in the above-mentioned spline shape, and the flange portion 3c is integrally formed at the base end portion. Further, a male screw portion 3d is formed on the outer peripheral surface of the mounting base 3b on the tip side, and the washer 19
The nut 20 is screwed through the via to fix the resin material 2 by tightening.

On the other hand, the tool shaft 4 positioned parallel to the holding shaft 3 has a tool mounting portion 4c formed at a position facing the mounting portion 3a, and the other end side is positioned at a position facing the bearing portions 9, 9. It is rotatably supported by bearings 21, 21 fixedly provided on the apparatus body 1a. Coil springs 22, 22 are provided between the bearings 21, 21 and the bearings 9, 9 on the side of the holding shaft 3, respectively.
The force works in the direction to push and release. The coil springs 22 and 22 prevent backlash of the feed screw 10 of the feed mechanism 6.

Further, the holding shaft 3 and the tool shaft 4 are provided with gears 23 and 24 which mesh with each other in a state of being close to each other. These gears 23, 24 are formed under the same conditions. That is, the holding shaft 3 and the tool shaft 4 are configured to rotate in opposite directions at the same angular velocity when the gears 23 and 24 are meshed with each other.

The base end portion of the tool shaft 4 projects outward from one bearing portion 21, and the drive handle 25 is attached to the projecting end portion so that the drive portion of the rolling mechanism 7 can be driven. Has been formed.

Further, the tool mounting portion 4c has a flange 24 formed in the middle thereof and a male screw portion 27 formed at the tip side. Then, the cylindrical tool 28 is fastened and coupled to the tool mounting portion 4c by a nut 30 via a washer 29.

Here, the cylindrical tool 28 has a spiral shape on the outer peripheral surface.
The two cutting edge portions 4a and 4b are formed in a multi-row state. Then, the cutting blades 4a and 4b cut out a spiral from the resin material 2.

In the processing device 1 configured as described above, first, the resin material 2 is mounted on the holding shaft 3, the tool 28 is mounted on the tool shaft 4, and then the drive handle 18 is rotated to operate. The holding shaft 3 and the tool shaft 4 are fed in directions close to each other. Then, the thick portion of the shaft material 2 and the tool 28
The cutting blades 4a and 4b are cut while being pressed, and the respective tips of the cutting blades 4a and 4b are brought into contact with the mounting base 3b. In this state, the gears 23 and 24 are brought into mesh with each other. Then, when the tool shaft 4 is rotated by rotating the drive handle 25 in the direction of arrow A, the gears 23 and 24 are moved through the gears 23 and 24. The holding shaft 3 is rolled in the direction of arrow B.

Then, after the tool shaft 4 and the holding shaft 3 each make one rotation, the drive handle 18 is rotationally operated to move the shafts 3 and 4 in the direction of leaving them, and the nut 30 is unscrewed. One spiral can be removed. The spiral object manufactured in this manner is formed in a spiral shape that is opposite to the spiral shape of the cutting edge portions 4a and 4b. According to the processing apparatus 1 according to the first embodiment, it is possible to mass-produce a spiral object having higher accuracy and durability as compared with those manufactured by lathe or injection molding. Also, since the machining progresses simultaneously over the entire length of the workpiece, the machining speed is very high compared to the conventional lathe machining.
In addition, it is possible to process a highly accurate spiral material that is difficult in injection molding.

In the first embodiment, the holding shaft 3 and the tool shaft 4 are
Machining is completed by rotating and in reverse at the same angular velocity and making one revolution, but the invention is not limited to this.
The processing may be completed by rotating the side twice and rotating the holding shaft 3 once. Further, the processing apparatus 1 shown in FIG. 3 is designed to be driven by the drive handles 18 and 25, but the shaft feed mechanism 6 and the rolling mechanism 7
The drive source and its structure are not limited to those described above. Further, although the holding shaft 3 and the tool shaft 4 are supported in a cantilevered state, the present invention is not limited to this, and both ends may be supported.

The second embodiment of the present invention will be described below with reference to FIG. The basic component part of the processing device 31 shown in the drawing comprises a tool plate 32 and a holding shaft 34 facing the tool surface 33 side of the tool plate 32.

Two parallel cutting edges 3 are provided on the tool surface 33 of the tool plate 32.
5, 36 are formed in pairs, and a plurality of pairs are arranged with a predetermined gradient.

Then, the cylindrical resin material 2 as a workpiece is mounted on the holding shaft 34, and then the working plate 32 and the holding shaft 34 are brought relatively close to each other, so that the cutting blade portions 35 and 36 are moved to the above-mentioned positions. Cut in the thickness of the resin material 2. Then, in this state, the tool plate 32 is moved in the direction of arrow C, and the holding shaft 34 is rotated in the direction of arrow D so that the tool plate 32 rolls with respect to the tool surface 34. By driving such a tool plate 32 and a holding shaft 34, a spiral object can be cut out from the resin material 2. According to the processing apparatus 31 of the second embodiment, the same effect as that of the above-described first embodiment can be obtained.

In addition, in the said 1st and 2nd Example, although only one spiral material could be cut out from one resin material, by increasing the number of cutting blade parts, two spiral materials can be cut at once. It is also possible to cut out. Further, the spiral object cut out as described above can be used, for example, as a helical blade of a helical compressor. And
At this time, the spiral-shaped material cut out at equal pitches is elastically deformed to be used in an improper pitch state. Further, the cutting blade portions 4a, 4b, 35, 36 are formed at equal pitches with respect to the tool shaft 4 or the tool plate 32, but by forming the cutting blade portions 4a, 4b, 35, 36 at unequal pitch states, the helical blades are not elastically deformed. Also included is one configured to cut out a spiral-shaped object having an unequal pitch that can be used as.

〔The invention's effect〕

(1) Compared to those manufactured by lathe and injection molding, a spiral material processing apparatus suitable for high-speed and mass-production of spiral materials with high accuracy and excellent durability. Can be provided.

(2) Since the machining progresses at the same time over the entire length of the workpiece, the machining speed is very high compared to the conventional lathe machining, and it is possible to machine the spiral material with high precision which is difficult by injection molding. .

[Brief description of the drawings]

1 to 3 show a first embodiment of the present invention,
FIG. 1 is a plan view showing a basic configuration of a processing apparatus, FIG. 2 is a plan view showing a processing state of the processing apparatus, FIG. 3 is a plan view showing a specific example of a shaft feeding mechanism and a rolling mechanism, FIG. 4 is a perspective view showing the basic construction of the second embodiment of the present invention, and FIG.
The figure is a side view showing a helical blade of a Heical compressor. 2 ... Resin material (workpiece), 3 ... Holding shaft, 4 ... Tool shaft, 6 ... Axial feed mechanism (axial feed means), 7 ... Rolling mechanism (rolling means), 4a, 4b …… Cutting blade part.

Claims (3)

(57) [Claims] 1. A holding means for holding a workpiece having a hollow portion formed by an outer shell having a predetermined thickness, and a pair of cutting blades having at least one cutting blade having a cutting depth larger than the predetermined thickness. A pair of cutting blades, a feeding means for driving the cutting blades in a direction in which a surface to be processed of the workpiece is present, and rolling for relatively rolling the cutting blades with respect to the surface to be processed. And a means for processing a spiral object. 2. A holding shaft of a holding tool for holding a hollow cylindrical workpiece, a tool shaft provided parallel to the holding shaft, and a spiral cutting blade provided on a peripheral surface of the tool shaft. Section, a shaft feed means for moving the holding shaft and the tool shaft in a relatively close direction while keeping the holding shaft and the tool shaft in parallel, and cutting the spiral cutting edge part with respect to the workpiece, the holding shaft and the tool shaft. Characterized in that the cutting blade portion is a cutting blade portion provided with a plurality of pairs of two cutting blades. Equipment for processing spiral objects. 3. A holder for holding a hollow cylindrical workpiece and having a holding shaft for rotating the workpiece, and a pair of cutting blades provided parallel to the holding shaft and having two blades. A tool having a tool surface having a plurality of sets of cutting blades, and the cutting blades relative to the workpiece by relatively moving the holding shaft and the tool surface in a relatively close direction while keeping them parallel to each other. And a shaft feeding means for cutting the workpiece, and a displacement means for displacing the surface to be machined of the workpiece and the tool surface in a direction orthogonal to the proximity direction at a predetermined relative speed, respectively. Processing equipment.