JPH0639528A - Method for positioning cylinder block - Google Patents

Abstract

(57) [Abstract] [Purpose] Providing a method for correctly positioning the front and rear positions and the left and right positions of a cylinder block when quickly, accurately, labor-savingly and hygienically removing the flash of the journal portion of the cylinder block. To do. [Structure] In a device for mounting a cylinder block on a bed in an inverted position and removing flash of a journal portion with a broach, front and rear end positioners 7, 8 and left and right positioners 9, 10 arranged on the bed 2 are described. Then, the first step of temporarily positioning the front and rear positions and the left and right positions of the cylinder block 6, the second step of moving the cylinder block 6 to the set position, and the downward movement of the movable base plate 12 move the brooch 21 to the journal portion. The third step of pushing in is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder block positioning method.

[0002]

2. Description of the Related Art Casting flash is projected on a journal portion of a cylinder block (hereinafter referred to as "workpiece") produced by casting. To remove the flashing flash, an operator conventionally used an air chisel or the like. However, noise and dust are generated in such a manual work, the work environment is bad, and there is room for improvement.

[0003]

Therefore, by automating these flash removal operations to improve the working environment,
It is important to improve the production speed and quality stability by improving the manual work using air chisel.

The present invention has been proposed in view of the above circumstances, and is a cylinder in a flash removing device for a cylinder block journal, which quickly, accurately, labor-savingly and hygienically removes flash without leaving flash. It is an object of the present invention to provide a method for positioning blocks in the front, rear, left and right.

[0005]

To this end, the present invention mounts a cylinder block in an inverted posture with the oil pan mounting surface facing upward on receiving pins that are erected on the front, rear, left and right of the bed,
After pressing the upper surface of the cylinder block with the movable base plate that can be moved up and down via the front, rear, left and right contact pins, move the brooch attached to the lower part of the movable base plate in the axial direction of the journal section. In a device for removing flash of a part, the front and rear of the bed 1
The first step of temporarily positioning the front and rear positions and the left and right positions of the cylinder block through the pair of front and rear end positioners and the pair of left and right positioners on the left and right, and then releasing the constraint to free the cylinder block, The second step of moving the cylinder block up and down to the set position through the receiving pins by the cylinder block lifting hydraulic cylinders that are respectively installed upright at the four corners, and the movable base plate is moved down and formed at both ends of the broach. It is characterized in that the guide surface is positioned left and right by the third step of pushing the guide surfaces into the journal portions at both ends of the work.

[0006]

According to this structure, the work supported horizontally on the four receiving pins in the inverted position is first moved forward and backward by the pair of front and rear end positioners and the left and right positioners.
By sandwiching each from the left and right, positioning in the front-back direction and left-right direction is quickly performed, and then each positioner returns to its original position to release the constraint of the workpiece and leave the workpiece in a free state. Become. Next, the work is lifted to a predetermined height by the action of the lifting hydraulic cylinder, then the horizontal movable base plate descends by a predetermined stroke, and the stopper attached to the lower part of the work comes into contact with the front end face of the work. The broach stops with one blade outside the rear end of the work and the remaining blades each located between the journals of the work. At this time, the guide surfaces on both sides of the broach fit into the journals at both ends of the work in the first half of the descending stroke, so that the work slides slightly on the receiving pins, and the axial displacement between the work and the broach becomes zero. Further, in the latter half of the same stroke, the contact pin presses the upper end of the work, and each receiving pin and hydraulic cylinder are moved downward through the work, so that the upper end of the work is correctly positioned at a predetermined height. To be done. The stopper restrains the forward movement of the work due to the cutting reaction force of the broach. After the front-rear direction positioning, the left-right direction positioning, and the up-down direction positioning of the work are completed in this way, the broach simultaneously shears and removes the flash of each journal portion of the work by the stroke in the axial forward direction.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring mainly to FIGS. 1 to 3, reference numeral 1 is a pedestal on which the device of the present invention is mounted, and the device of the present invention is composed of a support column 3 which is erected at each of four corners of a rectangular mounting member 2. It has a rectangular parallelepiped structure in which the four corners of the rectangular top plate 4 are fixed to the upper end. As shown in FIGS. 4 to 6, reference numeral 5 denotes a roller conveyor for introducing the work 6 into the apparatus, which is driven by a chain from the driving apparatus 5a.
Reference numerals 7 and 8 denote front and rear end positioners that position the front and rear ends of the work 6, and reference numerals 9 and 10 denote left and right positioners that position the left and right sides of the work 6, respectively. Here, the base end of the front-end positioner 7 is pivotally attached to the installation member 2 so as to be capable of raising and lowering along a plane orthogonal to the axis (crankshaft axis) of the work journal portion, and its tip is brought to a horizontal position and stopped, It is located on the center line of the work journal and regulates the movement of the work. After that, the rear end positioner 8 is pivotally attached to the installation member 2 along the plane orthogonal to the axis of the work journal portion so that the rear end positioner 8 can be raised and lowered, and its front end is brought down to a horizontal position and stopped. At this time, the action of the hydraulic cylinder built into the tip causes the contact plate 8a to move.
Moves in the axial direction (forward) and positions in the front-back direction. The left positioner 9 and the right positioner 10 are projected on the installation member, and the abutting plates thereof move in the left-right direction in the order of left side and right side by the action of the built-in hydraulic cylinders to perform the horizontal positioning. 11 is before and after the installation member 2,
It is a work lifting hydraulic cylinder that is erected on each of the left and right parts and that lifts up and down by supporting the four corners of the bottom surface of the work at its upper end. Its movable end can project upward from the clearance between the rollers as shown in FIG. Has become.

Referring again to FIGS. 1 to 3, reference numeral 12 designates a movable base plate which can be moved up and down, the upper and lower ends of which are fixed to the top plate 4 and the mounting member 2, respectively, and which are arranged at equal intervals so as to form a substantially equilateral triangle. It is possible to move up and down along the three guide pillars 13 by a base plate lifting hydraulic cylinder 14 projecting from the top plate 4. Reference numeral 15 is a stopper for the work 6, which is the movable base plate 1
2 projecting from the work table 6 when the movable base plate 12 descends.
It comes into contact with the rear end and regulates the movement of the work 6 due to the cutting of the broach blade described later. Reference numeral 17 denotes a broach guide rod arranged in parallel in the axial direction, and as shown in FIG.
Brackets 18 are provided on the lower surface of the movable base plate 12 at the front and rear ends, respectively.
The brackets 18 are fixed to each other, and at the lower end of each bracket 18, work pressing pads 19 of equal length are provided in a protruding manner. 21
Is an axial broach, the front and rear ends of which are axially slidably supported by the broach guide rod 17 via slide bearings 22, and the bottom surface has seven broach blades 23 each having three axial blades. (FIGS. 10 and 13) are fixed at the same intervals as the journal portion. Brooch blade 23
The upper half is a parallel part having a width approximately the same as the width in the direction perpendicular to the crankshaft of the main cap mounting parts (hereinafter referred to as the main cap parts) at both ends of the work journal, and the lower half is tapered downward. It has a symmetrical cross-sectional shape with a center part of the lower end protruding as a semi-circular cutting edge, and the left and right side surfaces of the upper and lower half parts of the broach blade 23 at both ends are fitted to the main cap part of the workpiece. The guide surface 23a is formed. Reference numeral 25 denotes a broach drive hydraulic cylinder projectingly provided at the front end of the movable base plate 12, and its output rod is fixed to the rear end of the broach 21.

5 to 6 of such a structure, FIG.
Describing the operation along the procedure of No. 4, first, when it is confirmed that there is no work on the roller conveyor 5 by a conventional discharge tube sensor, the front end positioner 7 is rotated around its base end to a horizontal position ( 14S1). Next, the roller conveyor 5 is rotated (S2) by the drive of the driving device 5a, the work 6 is introduced onto the roller conveyor 5 (S3, S4), and the rear end positioner 8 is rotated normally (S2).
5) Then, after the contact plate 8a moves forward (S6), the left positioner 9 projects (S7), and the right positioner 1
0 moves forward (S8) and then moves backward (S9), the left positioner returns (S10), and the contact plate 8a moves backward (S1).
By doing 1), the work is slightly shifted in the lateral direction,
After aligning the vertical center line with the center line of the installation member 2 and the center of the work with the center of the installation member 2, the left positioner 10 returns to its original position to release the left-right restraint of the work.

Next, as shown in FIG. 11, the four work lifting hydraulic cylinders 11 are energized all at once to lift the works by, for example, 100 mm (S12) via a receiving pin,
The movable base plate 12 is moved through the base plate lifting hydraulic cylinder 14
Depress 0 mm (S13). This is possible because the axial force of the base plate lifting hydraulic cylinder 14 is larger than that of the workpiece lifting hydraulic cylinder. Then,
The four corners of the upper surface of the work come into contact with the lower ends of the four contact pins protruding from the movable base plate, and the four corners of the lower surface of the work are pushed up by the work lifting hydraulic cylinder 11, so that the upper surface of the work is horizontal. Then, the rear end of the upper surface of the work is restrained from moving rearward by a stopper 15 projecting from the rear end of the movable base plate 12.

In the first half of the 50 mm downward movement stroke (S13) of the movable base plate 12 described above, the guide surfaces 23a at both ends of the broach are pushed into the main cap portion of the journal portion of the work piece, so that as shown in FIG. Then, the work is slightly moved laterally from the solid line position to the broken line position on the receiving pin so that the longitudinal centerline of the work coincides with the axis of the broach, thereby completing the correct lateral positioning of the work. In order to enable the lateral movement of the work by the downward stroke (S13) of the broach, as described above, the front and rear end positioners and the left and right positioners position the work once at a predetermined position. After that, by returning to the original position, the constraint of the work was released. Subsequently, in the latter half of the downward movement stroke, the lower ends of the contact pins 19 of the movable base plate 12 push down the four corners of the work top surface, so that the top surface of the work is correctly positioned at a predetermined height. By the above operation, the work is set in the three-dimensional correct relation position with respect to the broach. Therefore, if the broach is stroked in the axial direction (S14, S15) via the broach drive cylinder, The flash is removed correctly all at once. At that time, since each broaching blade is a three-step blade, all flashes are properly and cleanly removed with a relatively small shearing force. Finally, the movable base plate 12 is raised (S
16) Then, the installation member 2 is lowered (S17), the rear end positioner 8 is reversed (S18), and the front end positioner 9 is reversed (S19, S20), and then the roller conveyor 5
Is reversed to complete the work unloading (S21), the roller conveyor is stopped (S22), and a series of operations is stopped (S23).

[0012]

In summary, according to the present invention, the cylinder block is placed in the inverted posture with the oil pan mounting surface facing upward on the receiving pins which are erected on the front, rear, left and right sides of the bed, and the movable base plate is capable of moving up and down. After pressing the upper surface of the cylinder block through the front, rear, left and right contact pins, the broach attached to the lower part of the movable base plate is moved in the axial direction of the journal to remove flash in the journal. In the apparatus, after the front and rear positions and the left and right positions of the cylinder block are once positioned through a pair of front and rear end positioners arranged on the bed and a pair of left and right positioners on the left and right, the constraint is released. The first step of freeing and the cylinder block lifting hydraulic cylinders installed upright at the four corners of the bed through the receiving pin. The second step of moving the cylinder block to the set position and the left and right positioning of the guide surfaces formed on both ends of the broach by moving the movable base plate downwards in the third step of both ends of the work The present invention is extremely useful industrially because a method of positioning the cylinder block in the deflashing device of the cylinder block journal for quick and accurate removal without leaving the cylinder block front and rear, left and right is obtained. .

[Brief description of drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a horizontal sectional view taken along the line IV-IV in FIG.

FIG. 5 is a side view of FIG.

6 is a horizontal sectional view taken along line VI-VI of FIG.

FIG. 7 is a view taken along the line VII-VII in FIG.

FIG. 8 is a view on arrow VIII-VIII in FIG.

9 is a front view of FIG. 8. FIG.

10 is an overall vertical sectional view of FIG.

FIG. 11 is an explanatory diagram showing a vertical positioning procedure of the work in FIG. 2;

FIG. 12 is an explanatory diagram showing a procedure for laterally positioning the work in FIG. 2;

13 is an enlarged view and a side view showing the broach blade of FIG.

FIG. 14 is a flowchart showing the operating procedure of the device of the present invention.

[0013]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stand 2 Installation member 3 Strut 4 Top plate 5 Roller conveyor 5a Drive device 6 Work 7 Front end positioner 8 Rear end positioner 8a Abutment plate 9 Left positioner 10 Right positioner 11 Work lift hydraulic cylinder 12 Movable base plate 13 Guide post 14 Base plate lift Hydraulic cylinder 15 Stopper 17 Brooch guide rod 18 Bracket 19 Contact pin 21 Brooch 22 Slide bearing 23 Brooch blade 23a Guide surface 25 Brooch drive hydraulic cylinder

Claims (1)

[Claims] 1. A cylinder block is placed in an inverted posture with an oil pan mounting surface facing upward on receiving pins which are erected on the front, rear, left and right sides of a bed, and a movable base plate which can be moved up and down attaches the front, rear, left and right contact pins. After pressing the upper surface of the cylinder block through the broach, the brooch attached to the lower part of the movable base plate is moved in the axial direction of the journal part to remove the flash of the journal part. The first step of temporarily positioning the front and rear positions and the left and right positions of the cylinder block through the pair of front and rear end positioners and the pair of left and right positioners on the left and right, and then releasing the restraint to free the cylinder block. And the cylinder block lifting hydraulic cylinders installed upright at the four corners of the bed, and the cylinder blocks are installed through the receiving pins. Horizontal positioning is performed by the second step of moving up to a fixed position and the third step of moving down the movable base plate and pushing the guide surfaces formed at both ends of the broach into the journal portions at both ends of the work. Characteristic cylinder block positioning method.