JPH0333410Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention includes a wrapping tool having a pair of upper and lower clamp arms that clamp the pin portion of a crankshaft, and a wrapping tool that is stretched along the inner surface of both clamp arms. A feeding reel and a take-up reel for the wrapping tape to be installed are provided above and below the arrangement part of the wrapping tool, and the crankshaft is rotated with both the clamp arms closed and the wrapping tape in pressure contact with the pin part, The present invention relates to a super-finishing device for a crankshaft, which performs super-finishing on a pin part while vibrating the wrapping tool following the revolution of the pin part.

(Prior Art) Conventionally, in Japanese Patent Application No. 130002/1987, the applicant of the present invention proposed a wrapping tape that is drawn out from one clamp arm on the take-up reel side, for example, the upper clamp arm, as a device of this type. The present invention provides a swinging arm that moves the wrapping tool toward the tail end side between the winding reel and the wrapping tool. In this case, the swinging arm is generally composed of a straight arm having an engager at the lower end facing one side of the wrapping tape, and is supported on a pivot at the upper end so as to be swingable in the hand-feeding direction. do.

(Problem to be solved by the invention) By the way, when superfinishing a crankshaft with a large amount of offset in the pin part, the vibration width of the wrapping tool is also large because the diameter of the revolution of the pin part is large. , it is necessary to increase the amount of manual wrapping of the wrapping tape. In the above-mentioned proposal, when the swinging arm is lengthened to increase the amount of wrapping tape, the pivot of the swinging arm is changed to avoid interference of the lower end engager with the clamp arm, etc. There is a problem that the device has to be placed above with a relatively large gap between it and the clamp arm, and the take-up reel and the like have to be placed above accordingly, resulting in an increase in the size of the device. .

An object of the present invention is to provide a device that solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a wrapping tool having a pair of upper and lower clamp arms that clamp the pin portion of the crankshaft, and
A feeding reel and a take-up reel for wrapping tape to be stretched along the inner surfaces of both clamp arms are provided above and below the wrapping tool placement area, and both clamp arms are closed to press the wrapping tape to the pin part. Rotate the crankshaft with the
The wrapping tape is guided out from one clamp arm on the take-up reel side, the wrapping tool being vibrated to follow the revolving motion of the pin part and performing super finishing on the pin part. The wrapping tape is provided with a swinging arm that pulls the wrapping tape toward the tail end of the wrapping tool between the take-up reel and the wrapping tape led out from one of the clamp arms, and the wrapping tape is stretched between the take-up reel and the wrapping tape. With the position of the wrapping tape when the wrapping tape is taken as a reference line, the direction in which the wrapping tape is brought in is the inside, and the opposite side is the outside, and the part inside the reference line between the wrapping tool and the take-up reel. A swinging fulcrum of the swinging arm is provided at the swinging arm, and the swinging arm is moved from an inoperative position where the tip of the swinging arm protrudes outside the reference line so that the tip of the swinging arm is moved inside the reference line toward the wrapping tool side. A driving source for swinging is provided in the operating position where the swinging arm enters, and a first drive source is provided at the tip of the swinging arm that faces the outer surface of the wrapping tape on the reference line in the non-working position.
At the tip of the engaging element and the protrusion formed in the middle part of the swinging arm and protruding in the direction opposite to the direction of swinging to the operating position, on the inner surface of the wrapping tape on the reference line in the non-working position. It is characterized by providing a second engaging element facing each other.

(Example) The invention will now be described with reference to illustrated embodiments.

Referring to FIGS. 1 and 2, 1 is a machine base, 2 is a work holding device provided on a tool stand 3 in front of the machine base 1, and the holding device 2 is attached to a work head on left and right side 1. 4 and a tailstock 5 on the other side, a crankshaft W is sandwiched between a work spindle 4a provided in the head 4 and a tailstock 5a provided in the stock 5, and this is a spindle motor provided in the head 4. 4b for rotation.

The machine base 1 is also provided with a machining head 7 as shown in FIGS. 3 to 5, which is equipped with a plurality of wrapping tools 6 arranged in a row in the horizontal direction, and a pair of upper and lower clamps for each of the tools 6. A wrapping tape 9 is stretched on the inner surfaces of the arms 8, 8, and a take-up reel 10 of the tape 9 is placed above the tool 6 placement area, and a feed reel 11 is placed below it. 6 are supported on a common shaft 6b in a long hole 6a at the tail end so as to be able to vibrate freely, and by closing both arms 8, 8 of each tool 6, the crankshaft W held by the holding device 2 is opened. The crankshaft W is rotated with the wrapping tape 9 in pressure contact with each pin portion a from above and below, and each tool 6 is vibrated following the revolution of each pin portion a, and the pin portion is The super-finishing process of a.

Further, above each wrapping tool 6, a wrapping tape 9 led out from one clamp arm on each take-up reel 10 side, that is, the upper clamp arm 8, is placed between the wrapping tape 9 and the take-up reel 10. A swinging arm 12 for winding the wrapping tape 9 by hand is provided on the tail end side, and a winding device 13 for winding a fixed length of the wrapping tape 9 is provided on each winding reel 10.

To explain this in detail, as shown in FIGS. 5 and 6, each winding device 13 uses a pressing roller 13 to hold the wrapping tape 9 led out from each wrapping tool 6.
A common toothed take-off shaft 13 is installed horizontally on the processing head 7 in cooperation with a.
b, and each reel drive roller 13c that contacts the peripheral surface of each take-up reel 10 to rotate it, and a gear 13 at the end of the take-up shaft 13b.
d is connected via an intermediate gear 13f to a gear _13e at the end of a common shaft 13c1 for each drive roller 13c installed horizontally on the upper part of the head 7, and connected to the take-up shaft 13b via a one-way clutch 13g. The attached lever 13h was connected to a connector 14a fixed to a piston rod of a hydraulic cylinder 14 provided on one side of the head 7.

Each swing arm 12 is fixed at its tail end to a common shaft 15 installed horizontally on the processing head 7, and a lever 15a at the end of the shaft 15 is connected to the connector 14a. As a result, as the piston rod moves forward to the right in FIG. At the same time, each take-up reel 10 is rotated clockwise via each drive roller 13c so that a certain length of wrapping tape 9 is wound onto each take-up reel 10. did.

In addition, when the connector 14a moves backward, the one-way clutch 13g causes the take-up shaft 13 to move backward.
b is prevented from reversing, and each take-up reel 10 is supported by a respective support arm 1 biased by a spring 10a.
It was made to come into elastic contact with each drive roller 13c via 0b.

In the drawing, 6c is a balancer spring provided at the tail end of each wrapping tool 6, and 16 is each feeding reel 11.
A brake member 17 applies a brake to the feeding of each wrapping tape 9 from the crankshaft W, and 17 indicates a wrapping tool for superfinishing each journal portion of the crankshaft W.

In Figs. 1 and 2, 7' indicates a processing head different from the above-mentioned processing head 7 for super-finishing the seal contact surface and thrust receiving surface of the crankshaft W, and is attached to the machine stand 1. A plurality of sets of processing heads 7, 7' are movably supported on the provided annular roll 1a,
Further, the portion of the rail 1a facing the work holding device 2 is constituted by a movable rail 1d attached to a drive unit 1c that moves forward and backward by a cylinder 1b, and the index table 1f of the indexing mechanism 1e.
By rotating the index of the rail 1a,
The movable rail 1d is moved circumferentially along the movable rail 1d so that any one of the movable rails can be selected on the movable rail 1d. In the illustrated example, two sets of both machining heads 7, 7' are provided, and the two heads 7, 7' indicated by A and the two heads 7, 7' indicated by B in the figure form the crankshaft of two models A and B. Made it ready for W processing.

In the above configuration, in this embodiment, the position of the wrapping tape when the wrapping 9 led out from the upper clamp arm 8 is stretched between the take-up reel 10 is set as a reference line, and the wrapping tape is manually moved. The shaft 15, which is the swinging fulcrum of the swinging arm 12, is provided inside the reference line between the wrapping tool 6 and the take-up reel 10, and the swinging arm The arm 12 is swung by the hydraulic cylinder 14 serving as a driving source from an inoperative position in which the tip of the arm 12 protrudes outside the reference line to an operating position in which the tip enters inside the reference line toward the wrapping tool 6 side, that is, downward. A first engager 18 consisting of a roller that faces the outer surface of the wrapping tape 9 on the reference line in the non-operating position is pivotally attached to the tip of the swinging arm 12, and the swinging arm 12 is A protrusion 19 protruding in the opposite direction to the swinging direction to the operating position is formed in the intermediate portion, and a roller that faces the inner surface of the wrapping tape 9 on the reference line in the non-operating position is attached to the tip of the protrusion 19. The second engaging element 20 consisting of the above-mentioned structure was pivoted.

(Function) By the operation of the swing arm 12, the take-up reel 10
The wrapping tape 9 led out from one of the side clamp arms 8 is brought to the tail end side of the wrapping tool 6 between it and the take-up reel 10, and the vibration of the tool 6 is applied to the wrapping tape 9. Allowable slack can be added.

In this case, since there is a second engager 20 protruding in the direction opposite to the wrapping direction of the wrapping tape 9 in the middle part of the swinging arm 12, the swinging arm 12 is moved as shown in FIG. The wrapping tape 9 is bent in the opposite direction to the winding direction between the first engaging element 18 at the tip and the take-up reel 10, and therefore, compared to the straight one of the above-mentioned proposal, the wrapping tape 9 is bent by the amount of bending. The wrapping tape 9 is unnecessarily gathered by hand.

(Effect of the invention) As described above, according to the present invention, the amount of wrapping can be increased without increasing the length of the swinging arm compared to the above-mentioned proposal, and the fulcrum of the swinging arm and the clamp can be increased. There is no need to provide a large gap between the arm and the device, which prevents the device from becoming larger.
In addition, a second
It is sufficient to simply provide the engaging element, and the structure is simple and inexpensive.

[Brief explanation of the drawing]

Figure 1 is a plan view of an example of the device of the present invention, Figure 2 is a partially cutaway side view thereof, Figure 3 is a front view of the processing head, Figure 4 is a plan view thereof, and Figure 5 is the figure 3. of-
FIG. 6 is a side view taken along the line, and FIG. 6 is a cross-sectional view taken along the line . 6... Wrapping tool, 8, 8... Clamp arm, 9... Wrapping tape, 10... Take-up reel,
DESCRIPTION OF SYMBOLS 11... Feeding reel, 12... Swinging arm, 18... First engaging element, 19... Protrusion, 20... Second engaging element, W...
Crankshaft, a...pin part.

Claims (1)

[Scope of utility model registration request] The wrapping tool includes a wrapping tool having a pair of upper and lower clamp arms that clamp the pin portion of the crankshaft, and a wrapping tape supply reel and take-up reel that is stretched along the inner surface of both clamp arms. Provided above and below the placement part,
With both the clamp arms closed and the wrapping tape pressed against the pin part, the crankshaft is rotated, and the wrapping tool is vibrated following the revolution of the pin part, while superfinishing is performed on the pin part. The apparatus includes a swinging arm that pulls the wrapping tape led out from one clamp arm on the take-up reel toward the tail end of the wrapping tool between the take-up reel and the wrapping tape. In this case, the direction in which the wrapping tape is brought in is inward, with the position of the wrapping tape drawn out from the one clamp arm being stretched between the take-up reel and the reference line. , the opposite side is the outside, and a swinging fulcrum of the swinging arm is provided at a portion inside the reference line between the wrapping tool and the take-up reel, and the swinging arm is connected so that its tip is aligned with the reference line. A drive source is provided at the tip of the swinging arm to swing from an inoperative position protruding outside the line to an operating position where the tip thereof enters inside the reference line toward the wrapping tool side. a first engager facing the outer surface of the wrapping tape on the reference line at the position, and a tip of a protrusion formed in the middle part of the swing arm that protrudes in a direction opposite to the swing direction to the operating position. , and a second engaging element facing the inner surface of the wrapping tape on the reference line in the inoperative position.