JPH0197535A - Machining device for v-engine - Google Patents

Abstract

PURPOSE:To reduce the size of a whole device, by providing a work elevating means, a work holding means, a swing support table, a base bed, a work swing means, a machining means, and a work moving means. CONSTITUTION:A cylinder block W held to a work holding table 2 is inclined based on a swing support table 4 by means of a work swing means 8, and machining is effected by a machining means 10 on at least one of a plurality of cylinders to form a first row. The block W is moved in the direction of the central axis of a crank shaft by a distance equivalent to a pitch distance between the cylinders by means of a work moving means 9. The direction of a plurality of cylinders arranged in the second row of a pair of cylinder rows is inclined based on the swing support table 4 by means of the work moving means 9 so that the direction is pointed to a machining direction. Thereafter, machining by the machining means 10 on at least one of a plurality of cylinders to form a second row is performed.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a cylinder block in a so-called "V-type engine" in which a plurality of cylinders form a pair of cylinder rows and are arranged in a 7-shape. V used for processing
This invention relates to processing equipment for type engines.

(Prior Art) In general, compared to a so-called in-line engine in which a plurality of cylinders are arranged in a straight line, a so-called ■-type engine in which a plurality of cylinders are arranged to form a pair of cylinder rows to form a V-shape is generally used. It is known that the overall length of an engine is reduced by shortening the crankshaft, and the engine has high rigidity.

Incidentally, the plurality of cylinders formed in the cylinder block of an engine usually have their inner walls treated with surface treatment to increase heat resistance and wear resistance, or are made of cylindrical members with excellent heat resistance and wear resistance. Press-fitting, etc. is performed. Therefore, in general, as a pre-work such as surface treatment or press-fitting of the cylindrical member, surface treatment such as polishing is performed on the inner wall surface of the cylinder provided in the cylinder block obtained by casting.

When such surface processing is performed on each cylinder provided in the cylinder block of a V-type engine as described above, first, for example, a plurality of cylinders forming the first cylinder row in a pair of cylinder rows are After a processing means such as a grinding wheel is inserted into the cylinder and surface processing is performed on the inner wall surface of the cylinder, the processing means is moved to a position corresponding to the second cylinder row, and the processing means is moved to a position corresponding to the second cylinder row. The cylinder is inserted into a plurality of cylinders, and surface processing is performed on the inner wall surfaces of the cylinders.

However, when surface processing is performed on the inner wall surface of a cylinder in a V-type engine as described above, the mechanism for moving the processing means from the first cylinder row to the second cylinder row is relatively large-scale. Become a thing,
This has the disadvantage that the entire device becomes larger. Further, it is not easy to accurately position the processing means with respect to the cylinders forming the first and second cylinder rows.

On the other hand, instead of moving the processing means relative to the cylinder block provided with the first and second cylinder rows, the workpiece holding table that holds the cylinder block is moved relative to the processing means, and the surface processing It is conceivable to position the cylinder to be processed relative to the processing means, thereby reducing the size of the entire apparatus.

In such a case, it is required to accurately position the cylinder block in which the cylinder to be processed is formed, that is, the workpiece, with respect to the processing means. In connection with positioning the workpiece relative to the processing means, a positioning jig device for positioning the workpiece has been proposed as described in JP-A-61-219544. There is. This conventionally proposed positioning jig device includes a board that is swingably attached to a fixed jig stand, and a mounting plate that has a clamp member that is attached to the board with positioning in the horizontal and vertical directions. When the substrate is swung relative to the fixture, the workpiece attached to the mounting plate by the clamp member is swung relative to the fixture base, thereby accurately positioning the workpiece relative to the processing means. It will be held in

(Problems to be Solved by the Invention) However, in the positioning jig device as described above, the attachment of the workpiece to the substrate that is swingably attached to the fixed jig table requires a clamp member that grips the workpiece. Since the mounting plate is attached to the board, it is necessary to attach the mounting plate depending on the type of workpiece to the board, which reduces work efficiency. There is a problem with becoming.

In view of these points, the present invention aims to reduce the size of the entire apparatus, accurately position the cylinder provided in the cylinder block with respect to the processing means, and furthermore, allows the cylinder block to be positioned relative to the base for processing. It is an object of the present invention to provide a machining device for a type engine that can be installed relatively easily.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a processing device for a ■-type engine according to the present invention lowers a cylinder block of a ■-type engine provided with a pair of cylinder rows to a processing position. Alternatively, a workpiece lifting means for lifting from the processing position, a workpiece holding table for positioning and holding the cylinder block lowered to the processing position by the workpiece lifting means, and a workpiece holding table for the cylinder block held thereby. a swinging support base that swingably supports the crankshaft with an axis located on the central axis of the crankshaft to be placed;
A base that supports the swinging support stand movably in the direction along the central axis of the crankshaft that is arranged on the cylinder block is installed, and the workpiece holding stand is swung.
A workpiece rocking means for tilting the cylinder block with respect to a rocking support base in order to align the direction of a plurality of cylinders forming one of a pair of cylinder rows provided therein with a predetermined machining direction; At least one of the plurality of cylinders constituting one of a pair of cylinder rows in the cylinder block tilted relative to the swinging support by the moving means. a processing means for performing processing in a predetermined processing direction for each workpiece; Workpiece moving means is provided for moving the workpiece along the central axis direction of the crankshaft by a distance equal to the pitch interval between the plurality of cylinders.

(Function) In the type engine machining device according to the present invention configured as described above, the cylinder block held by the workpiece holder is connected to the first of the pair of cylinder rows provided therein. The plurality of cylinders arranged in a row are tilted relative to the swing support table by the work swing means so that the cylinders are oriented in a predetermined machining direction. Under such conditions, the processing means performs processing on at least one of the plurality of cylinders forming the first row.Next, the cylinder block is 1. The workpiece is moved in the direction of the central axis of the crankshaft by the workpiece moving means by a distance corresponding to the pitch interval between the plurality of cylinders forming each of the cylinder rows, and the second cylinder row of the pair of cylinder rows is
The plurality of cylinders forming the row are tilted with respect to the swing support table by the workpiece moving means so that they are oriented in the processing direction. Thereafter, at least one of the plurality of cylinders forming the second row is processed by the processing means, and the processing on the cylinder block is completed.

By doing this, the entire processing device can be made smaller, and the cylinder provided in the cylinder block can be accurately positioned with respect to the processing means, and the cylinder block can be easily attached to the base. Therefore, work efficiency is significantly improved.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a V-type engine machining apparatus according to the present invention, together with a cylinder block of a six-cylinder V-type engine that is machined thereby.

The V-type engine machining device shown in FIG.
Elevating table 1 that is lowered from the transport position to the processing position or raised from the processing position to the transport position. A workpiece holding table 2 that positions and holds the cylinder block W placed on the lifting table 1 and lowered to the processing position; a swinging support stand 4 that swingably supports the workpiece holding table 2; A base 6 that supports the table 4 in a horizontally movable manner. Swinging means 8 attached to the swinging support stand 4 and swinging the workpiece holding stand 2. A moving means 9 is attached to the base 6 and moves the swinging support 4, and a plurality of cylinders a and b (the cylinders a and b) forming a pair of cylinder rows are provided on the cylinder block W held on the workpiece holding table 2. In FIG. 1, the cylinder a is not shown.

The elevating table 1 includes workpiece conveyance rollers 12 for conveying the cylinder block W in the direction shown by arrow F in FIG. 1 (direction F). Elevating table 1
A lifting rod 1 extending from the lifting cylinder 16 is provided on the lower surface of the
The upper end of the lifting table 8 is fixed, and the lifting table 1 moves between a conveying position (as shown by the dashed line in FIG. 1) and a processing position as shown by the solid line in accordance with the operation of the lifting cylinder 16. The front and back of the lifting table 1 in the F direction are
A transport table 22 supported by the work holding table 2 as described later is disposed, and the transport table 22 is
The upper surface thereof is continuous with the upper surface of the elevating table 1 when the elevating table 1 assumes the transport position, and the workpiece transport roller 2 is used to transport the cylinder block W in the direction F.
0.

A workpiece holding table 2 is arranged below the lifting table 1. A lift cylinder 16 is fixed to the center portion of the lower surface of the workpiece holding table 2, and a through hole is formed through which a lift rod 18 provided in the lift cylinder 16 passes. A pair of opposing side wall members 3 are erected at both ends of the workpiece holding table 2 along the F direction. A bearing member 28 that rotatably supports a shaft 26, which is the center of rocking when the work holding table 2 is rocked, is disposed at the upper center portion of each of the pair of side wall members 3. The above-mentioned transport table 22 is fixed to the upper surface of each member 28. The axis of the shaft 26 is inserted into the cylinder block W placed on the lifting table 1 when the lifting table 1 takes the machining position as shown by the solid line in FIG. It is assumed that it is located on the central axis 0 of the crankshaft.

As shown in FIG. 3, at two predetermined locations on the workpiece holding table 2, when the elevating table 1 takes the processing position, there are holes formed on the lower surface of the cylinder block W placed on the elevating table 1. A positioning pin 30 that engages with the engagement hole and positions the cylinder block W with respect to the workpiece holding table 2 is provided upright. Furthermore, an F
A clamp support member 32 is attached that extends along the direction. The clamp support member 32 includes a lifting table l.
Four clamp members 34 are arranged to grip the cylinder block W placed on the lifting table 1 and fix it to the workpiece holding table 2 when the cylinder block W is in the processing position.

The clamp member 34 includes a clamp cylinder 36 fixed to the upper surface of the clamp support member 32. Clamp cylinder 36
A telescopic rod 38 is provided and extends downward, and a clamp arm 40 is provided with one end pivotally supported at the tip of the telescopic rod 38 and a hook formed at the other end to engage with the cylinder block W. . The clamp arm 40 has a middle portion attached to a bracket 42 erected on the workpiece holding table 2.
When the telescopic rod 38 is in the contracted state, it grips the cylinder block W, and when the telescopic rod 38 is in the extended state, it releases the cylinder block W.

A swing support table 4 is arranged below the workpiece holding table 2. An opening 4a is provided in the center of the swing support base 4, through which the lifting cylinder 16 passes, and which forms an opening extending in a direction perpendicular to the F direction.

Furthermore, side wall members 5 are erected on the swing support table 4 to face each of the side wall members 3 erected on the workpiece holding table 2 . At the upper center portion of each of the side wall members 5,
A bearing member 44 is disposed to rotatably support the shaft 26 which is rotatably supported by a bearing member 28 disposed at the upper center portion of each of the side wall members 3 erected on the workpiece holding table 2. ing.

A bracket 46 is provided on the upper surface of the swing support base 4 at a position close to one of the pair of side wall members 5.
is erected, and one end of a swing cylinder 48 constituting the swing means 8 is pivotally supported on the upper part of the bracket 46. The swing cylinder 48 is equipped with a telescoping rod 50, and the tip of the telescoping rod 50 is disposed at the upper center of the workpiece holding table 2 and one of the pair of side wall members 3, as shown in FIG. It is pivotally supported by a shaft 53 fixed to an intermediate portion of a bracket 52 fixed between the lower surface of the bearing member 28 and the lower surface of the bearing member 28 .

A base 6 is disposed below the swing support 4.

An opening 6a is provided in the center of the base 6, through which the lifting cylinder 16 passes, and which has substantially the same shape as the opening 4a of the swing support 4. Furthermore, a recess 54 in which the lower end of the lifting cylinder 16 is accommodated is formed in a portion of the floor surface on which the base 6 is placed that faces the opening 6a of the base 6. A pair of rails 56 extending along the F direction are laid on the upper surface of the base 6. The rails 56 are engaged with retaining members 58 arranged at six predetermined locations on the lower surface of the swing support base 4, and the swing support base 4 is guided by the rails 56 and moves in the F direction. It is considered a thing.

A bracket 60 is erected on the upper surface of the base 6 at a position close to the other of the pair of side wall members 5 erected on the swing support 4'. A shift cylinder 62 constituting the moving means 9 is fixed to the bracket 60, and the tip of a telescoping rod 64 provided in the shift cylinder 62 is fixed to the other of the pair of side wall members 5.

Furthermore, processing means 10 is arranged on the base 6. The processing means 10 includes a main body 66 erected on the base 6, and an elevating arm 6 that is movable up and down relative to the main body 66, and whose upper portion is bent toward the cylinder block W.
8. It includes two motors 70a and 70b1 fixed to the tip of the lifting arm 68, and grinding wheels 72a and 72b fixed to the output shafts of the motors 70a and 70b.

Based on the above configuration, grinding is performed on the inner wall surfaces of the three cylinders a forming the first cylinder row and the three cylinders b forming the second cylinder row formed in the cylinder block W. First, by operating the lifting cylinder 16, the lifting table 1 assumes the conveying position as shown by the dashed line in FIG. and,
When the cylinder block W is transported in the direction F on the transport table 22 located behind the lifting table l and reaches the top of the lifting table 1, the cylinder block W is operated by the lifting cylinder 16.
The lifting table 1, together with the cylinder block W, assumes a processing position as shown by solid lines in FIGS. 1 and 2. At this time, the cylinder block W is positioned with respect to the workpiece holding table 2 by engaging the positioning pin 30 erected on the workpiece holding table 2 with a retaining hole provided on the lower surface of the cylinder block W. , the central axis 0 of the crankshaft disposed in the cylinder block W is located on the axis of a shaft 26 rotatably supported by a bearing member 28 disposed on the side wall member 3.

After the cylinder block W is positioned relative to the workpiece holding table 2 in this way, the clamp member 34 attached to the workpiece holding table 2 via the side wall member 3 and the clamp support member 32 is operated, and the clamp The cylinder block W is fixed on the workpiece holding table 2 by the hook of the arm 40 engaging and gripping the cylinder block W.

When the cylinder block W is fixed on the workpiece holding table 2, the swinging cylinder 48 attached to the swinging support stand 4 via the bracket 46 is operated, and, for example, the telescoping rod 50 is brought into an extended state. As a result, as shown by the two-dot chain line in FIG.
With this, the direction of the first cylinder row provided in the cylinder block W is the grinding wheels 72a and 72b of the processing means lO.
The shaft 26 is pivoted by a predetermined angle that corresponds to a direction along the axis of the machine, that is, a predetermined machining direction. As a result, the work holding table 2 and the cylinder block W are tilted with respect to the swing support table 4, and the work holding table 2 is locked by a locking means (not shown), so that the cylinder block W is swung. The tilted state with respect to the dynamic support table 4 is maintained.

In this manner, the cylinder block W is tilted with respect to the swing support base 4, and the direction of the first cylinder row provided in the cylinder block W is aligned with the machining direction. As shown by the two-dot chain line in FIG. 2, the lifting arm 68 of the processing means 10 is lowered, and the motor 70 fixed to the tip of the lifting arm 68 is lowered.
Grinding wheels 72a and 7 fixed to the output shafts of a and 70b
2b are inserted into two of the three cylinders a forming the first cylinder row provided in the cylinder block W. Then, the motors 70a and 70b are activated and the grinding wheels 72a and 72b are rotated, thereby performing grinding on the inner wall surfaces of the two cylinders a. When the grinding process is completed, the lifting arm 68 is raised together with the motors 70a and 70b.

When the lifting arm 6 is raised, the locking state of the workpiece holding table 2 by the locking means is released.

Then, the swing cylinder 48 is activated, and for example,
By bringing the telescopic iron 50 into the contracted state, the workpiece holding table 2 is returned to the position shown by the solid line in FIG. 2 together with the cylinder block W.

Next, the shift cylinder 62 attached to the base 6 via the bracket 60 is activated, and, for example, the telescopic rod 64 is brought into a contracted state. As a result, the swing support base 4 is horizontally moved along the rail 56 in the transport direction, and the cylinder block W is mounted on it as shown by the two-dot chain line in FIGS. 1 and 3. The plurality of cylinders a and b forming each of the pair of cylinder rows are horizontally moved by a pitch interval S along the central axis direction of the crankshaft.

After the cylinder block W is moved horizontally in this way, the swing cylinder 4 is activated, and the telescoping rod 50 is further brought into a contracted state. Thereby,
As shown by the two-dot chain line in FIG. 2, the work holding table 2, together with the lifting table 1, the lifting cylinder 16, and the cylinder block W, has a predetermined direction of the second cylinder row provided in the cylinder block W. The shaft 26 is pivoted in a direction opposite to the above-mentioned angular direction by a predetermined angle that coincides with the machining direction determined. Then, the workpiece holding table 2 is locked by the locking means, and the cylinder block W is again maintained in a tilted state with respect to the swinging support table 4.

In this state, the lifting arm 68 is lowered, and the grinding wheels 72a and 72b fixed to the output shafts of motors 70a and 70b fixed to the tip of the lifting arm 68 are installed in the cylinder block W. It is inserted into two of the three cylinders b forming the second cylinder row, and grinding is performed on the inner wall surfaces thereof. When the grinding process is completed, the lifting arm 68 is raised together with the motors 70a and 70b.

As described above, two of the three cylinders a forming the first cylinder row provided in the cylinder block W,
Then, when the grinding process on the inner wall surfaces of two of the three cylinders b forming the second cylinder row is completed, the locking state of the workpiece holding table 2 by the locking means is released, and the rocking The movable cylinder 48 is activated, the telescopic rod 50 is extended, and the workpiece holding table 2, together with the cylinder block W, assumes the position shown by the solid line in FIGS. 1 and 2. Ru. In this state, the clamp member 34 is activated and the engagement between the clamp arm 40 and the cylinder block W is released. Thereafter, the lifting cylinder 16 is activated, and the lifting table 1, together with the cylinder block W, assumes the transport position as shown by the dashed line in FIGS. 1 and 2.

The cylinder block W moves over the lifting table 1 and the transport table 22 located in front of the lifting table 1.
It is transported in the direction F shown in FIG.
Therefore, as described above, the six cylinders a and b forming a pair of cylinder rows provided in the cylinder block W are
It is assumed that grinding is performed on the inner wall surfaces of the two cylinders a and b that have not been ground.

In addition, in the above-mentioned example, a plurality of cylinders a and b forming a pair of cylinder rows provided in the cylinder block W
Is the processing means 10 for processing two grinding wheels? 2a and 72b, and these grinding wheels 72a and 72b are used to grind two of the three cylinders a forming the first cylinder row provided in the cylinder block W, and three cylinders forming the second cylinder row. Grinding is performed on the inner wall surfaces of two of the cylinders b, but unlike this, the processing means is equipped with one grinding wheel or three or more grinding wheels. It may be provided with the following.

(Effects of the Invention) As is clear from the above description, according to the processing apparatus for a V-type engine according to the present invention, surface processing is performed on the inner wall surfaces of a plurality of cylinders forming a pair of cylinder rows in a cylinder block of a V-type engine. In doing this, the cylinder block is tilted relative to the processing means so that the processing means can perform processing on a plurality of cylinders, so that the entire processing apparatus can be downsized.

Moreover, the cylinder provided on the cylinder block can be accurately positioned with respect to the processing means, and furthermore, the cylinder block can be easily attached to the base, so that workability can be significantly improved.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are a side view, a front view, and a plan view showing an example of a V-type engine processing apparatus according to the present invention, together with a cylinder block of a ■-type engine processed by the apparatus. In the figure, 1 is a lifting table, 2 is a workpiece holding table, 4 is a swinging support stand, 6 is a base, 8 is a swinging means, 9 is a moving means, 10
16 is a processing means, 16 is a lifting cylinder, 26 is a shaft, 30 is a positioning bin, 34 is a clamp member, 48 is a swing cylinder, 62 is a shift cylinder, 70a and 70b are motors,
72a and 72b are grinding wheels, and W is a cylinder block. Patent applicant Mazda Motor Corporation

Claims (1)

[Claims] A work lifting means for lowering a cylinder block of a V-type engine provided with a pair of cylinder rows to a processing position or raising it from the processing position, and a cylinder block lowered to the processing position by the work lifting means. A workpiece holding table that positions and holds the workpiece, and a swinging device that swingably supports the workpiece holding table with an axis located on the central axis of the crankshaft that is arranged on the cylinder block held by the workpiece holding table. a support stand,
A base that supports the swinging support stand movably in a direction along the central axis of the crankshaft, and a base that swings the workpiece holding stand to move the cylinder block to the pair of cylinder rows provided thereon. a workpiece rocking means for tilting the plurality of cylinders forming one side with respect to the rocking support base in order to align the direction of the plurality of cylinders forming one side with a predetermined machining direction; At least one of the plurality of cylinders forming one of the pair of cylinder rows in the cylinder block tilted by the
a machining means for machining in the machining direction; and a machining means for machining in the machining direction; A processing device for a V-type engine, comprising: a workpiece moving means for moving the workpiece along the central axis direction of the crankshaft by a distance equal to the pitch interval in a plurality of cylinders forming the crankshaft.