JPS608181B2 - Double-headed surface grinding device - Google Patents

Description

[Detailed description of the invention] A. Industrial application fields This invention is a grinding device.

In particular, the present invention relates to a double-head surface grinding device that indexes a workpiece between rotating grindstones and uses both grindstones to simultaneously grind both end faces of the workpiece. B. Prior Art In general, as an example of the above-mentioned double-head surface grinding device, a structure shown in FIGS. 1 to 3 is known.

That is, in this double-head surface grinding device, upper and lower rotating shafts 5 and 6, which are rotated by electric motors 1 and 2 via respective transmission mechanisms 3 and 4, are supported on a main body frame 7. Grinding wheels 10 and 11 are respectively installed on both grinding wheels 8 and 9 so that their grinding surfaces correspond to each other, and the rotation of the grinding wheels 10 and 11 is installed between the two grinding wheels 10 and 11. A carrier plate 12 is provided which rotates and oscillates in a plane perpendicular to the axes 5 and 6,
A carrier plate 1 is placed between the upper and lower grinding wheels 10 and 11 that face each other.
Both end surfaces of the workpiece indexed by 2 are
It is configured so that grinding is performed at the same time at 0 and 11. However, this apparatus has a drawback that it is difficult to feed the workpiece at the loading station because the carrier plate 12 is constantly oscillating. C. Purpose of the Invention The present invention aims to improve work efficiency by indexing workpieces from two opposing locations between grindstones, and facilitates the feeding of workpieces at a loading station.

D. Structure of the Invention This invention is a double-headed grindstone in which upper and lower grindstones are arranged with their grinding surfaces facing each other, a workpiece is indexed between the two grindstones, and both end surfaces of the workpiece are simultaneously ground by both grindstones. In a surface grinding device, a rotary table that rotates intermittently by half a rotation at a predetermined time, two movable bodies that are slidably provided at opposing positions of the rotary table in a direction perpendicular to the rotation axes of both grinding wheels; A workpiece holding plate is attached to each of the two movable bodies and holds the workpiece at its tip, an arm reciprocates in a certain angle range, and a piston rod has a tip fixed to the arm. an oscillation motor whose main body side is fixed to the elevating member and whose rotating shaft slidably passes through the arm; and a lowermost end of the rotating shaft of the oscillation motor. A carrier mechanism consisting of an eccentric cam fixed to the cam, a holder that engages the eccentric cam fixed to the movable body, and a clamp member that fixes the movable body to a predetermined position on the rotary table is mounted on both sides of both grindstones. It is configured by providing each.

E. Embodiments The details of the present invention will be explained below with reference to the embodiments shown in FIGS. 4 to 6.

In the drawings, reference numeral 21 denotes a main body frame, and in a space 22 formed in the center, grindstones 25 and 26 attached to respective grindstone stands 23 and 24 are arranged with their grinding surfaces facing each other. 27 and 28 have respective grindstone heads 23 and 2 at opposing shaft ends.
A rotary shaft to which the grindstones 25 and 26 are respectively attached via the shaft 4, is supported by the main body frame 21, and is connected to each transmission mechanism 29,
30 to the electric motors 31 and 32, respectively, and when the electric motors 31 and 32 are driven, the transmission mechanisms 29 and 3 are connected to each other.
The rotating shafts 27 and 28 rotate through the grinding wheels 25 and 2.
6 respectively.

33 and 34 index the workpiece between the two grindstones 25 and 26, and provide oscillation motion to the workpiece between the two grindstones 25 and 26 in a direction perpendicular to the rotation axes 27 and 28 of the two grindstones 25 and 26. With the carrier mechanism that gives
5 and 26 are disposed opposite to each other on both sides of the main body frame 21.

In the above configuration, the workpieces are simultaneously indexed by the carrier mechanisms 33 and 34 at two opposing locations between the rotating upper and lower grinding wheels 25 and 26, and both end surfaces of each workpiece are indexed by the carrier mechanisms 33 and 34. Rotating shaft 27 of both grinding wheels 25, 26,
Grinding is performed simultaneously with both grindstones 25 and 26 while performing oscillation motion in a direction perpendicular to the grinding wheel 28.

Next, the details of the carrier mechanisms 33 and 34 will be explained in the seventh section.
This will be explained with reference to FIGS. 9 to 9.

Note that since both carrier mechanisms 33 and 34 have the same structure,
Only the carrier mechanism 33 will be explained, and the carrier mechanism 3
The explanation of 4 will be omitted. In Figures 7 to 9. 35
37 is a cylindrical body fixed to a base 36 integrally formed with the main body frame 21, and 37 is a carrier shaft rotatably supported inside the cylindrical body 35. A rotary table 38 is integrally fixed to the upper end of the carrier shaft, and a rotary table 38 is integrally fixed to the lower end of the carrier shaft. A rotary shaft 40 of an index motor 39 fixedly attached to the lower end of the cylindrical body 35 is connected by a socket 41, and the rotary table 38 is rotated by 180 degrees by the index motor 39 via a carrier shaft 37. ing.

Reference numerals 42, 42 denote guide rods supported in parallel on the upper surface of the rotary table 38 by three supporting members 43, 43, 43, and two movable bodies 44, 44 are slidably supported on both sides of the central supporting member 43. It is set up.

45, 45 are concave-shaped holders; 46, 46 are workpiece holding plates each having a plurality of holding holes 47, 47 into which the workpiece is inserted and held; They are integrally attached to the upper surfaces of the moving bodies 44, 44.

48 is a ring-shaped workpiece guide plate disposed around the outer periphery of the rotary table 38, and is fixed to the base 36 via a support 49 so that the upper guide surface is at the same height as the grinding surface of the lower grindstone 26. It has been done.

50 is a stationary member integrally fixed to the main body frame 21;
Reference numeral 1 denotes a swing motor configured to reciprocate at a constant rotation angle, which is attached to a stationary member 501 and has an arm 53 fixedly attached to its rotating shaft 52.

Reference numeral 54 denotes an elevating sleeve that is vertically slidably supported by a cylindrical portion 55 integrally formed with the arm 53, and an elevating member 56 is integrally attached to its upper end.

Reference numeral 57 denotes an oscillation motor fixed to the upper surface of the elevating member 56, whose rotating shaft 58 passes through the elevating sleeve 54 and has an eccentric cam 5 at its lowermost end that competes with the holders 45, 45.
9 is installed.

6. A cam lifting cylinder fixed to the upper surface of the lifting member 56, whose piston rod 61 passes through the lifting member 56 and has its lowermost end fixed to the arm 53, and the piston rod 6
1, the elevating member 56 moves up and down with respect to the arm 53, which causes the oscillation motor 57 to move up and down to move the eccentric cam 59 up and down.

62, 62 are clamp members installed at predetermined positions on the upper surface of the rotary table 38; 63, 63 are clamp members 62, 6
These are protrusions that are iron-locked to the clamp members 62, 62 provided on the side surfaces of the movable bodies 44, 44 corresponding to 2.

Next, the operation of the carrier platform 33 configured as described above will be explained.

First, when a workpiece is inserted and held in the holding hole 47 of the workpiece holding plate 46 located at the loading station on the opposite side of the grindstones 25 and 26 on the rotary table 38, the carrier ball 40 is moved by the index motor 39. The rotary table 38 is rotated half a turn through the rotary table 38.
As the workpiece is rotated, the workpiece holding plate 46 rotates from the loading station to the grinding station, and as a result, the workpiece inserted and held in the holding hole 47 at the loading station slides on the workpiece guide plate 48. Move to the grinding station. When this is completed, the piston rod 61 of the cam elevating cylinder 60 is moved back and forth, and the elevating member 56 is lowered relative to the arm 53, thereby lowering the eccentric cam 59 together with the oscillation motor 57 onto the moving body 44. It is joined and locked to a fixed holder 45. When the eccentric cam 59 is iron-locked to the holder 45, the swing motor 51 swings the arm 53 around the rotation shaft 52 at a predetermined rotation angle, and thereby the eccentric cam 60 also rotates around the rotation shaft 52. Holder 4 rotates and locks the eccentric cam 60'
5, the movable body 44 is moved along the guide bars 42, 42 toward both the grindstones 25, 26. Then, the workpiece holding plate 46 attached to the movable body 44 also moves together in the same direction, and the workpiece held in the holding hole 47 is indexed between the upper and lower rotating grindstones 25 and 26. At the same time, when the oscillation motor 57 is driven to rotate the eccentric cam 59, the movable body 44 is moved along the guide rods 42, 42 via the holder 45 within the range of the eccentricity of the eccentric cam 59, and the two grinding wheels 25, 26 are rotated. The workpiece holding plate 46 attached to the movable body 44 also moves back and forth repeatedly in the direction perpendicular to the rotating shafts 27 and 28, thereby closing the holding hole 4.
Oscillation motion is applied to the workpiece held at 7.
In this manner, both end faces of the workpiece are simultaneously ground by both grindstones 25 and 26 while applying oscillation motion to the workpiece. When the grinding of both end faces of the workpiece is completed, the drive of the oscillation motor 57 is stopped to stop the rotation of the eccentric cam 59, and at the same time, the swing motor 51 moves the arm 53.
The eccentric cam 59 is rotated at a predetermined rotation angle in the opposite direction around the rotating shaft 52, and the eccentric cam 59 is also rotated around the rotating shaft 52 in the opposite direction to join the eccentric cam 59. The movable body 44 is connected to the guide rods 42 and 4 via the locked holder 45.
2 in the opposite direction. When the movable body 44 moves along the guide rods 42, 42, a protrusion 63 provided on the side surface of the movable body 44 is engaged with the clamp member 62, and is clamped at a predetermined position on the rotary table 38. When this is completed, the piston rod 61 of the cam elevating cylinder 60 is extended to raise the elevating member 56 relative to the arm 53, thereby raising the eccentric cam 59 together with the oscillation motor 57 and locking it with the holder 45. Solve. When the eccentric cam 59 rises, the index motor 39 moves the carrier shaft 4
0, the rotary table 38 is rotated half a turn, and as the rotary table 38 rotates, the workpiece holding plate 46 is moved from the grinding station to the loading station in preparation for the next grinding process. It should be noted that while the workpiece 46 is being moved from the grinding station to the loading station, the workpiece inserted and held in the holding hole 47 falls under its own weight through a notch provided in the unloading station of the guide plate 48 and returns to a predetermined position. It is discharged. Furthermore, in the above description, one workpiece holding plate 46 is described, but
It goes without saying that the same operation is performed on the other workpiece holding plate 46 as well. Results of the Invention As explained above, according to the present invention, the workpiece is simultaneously indexed from two locations facing each other between the upper and lower grinding wheels, which improves work efficiency and also allows intermittent rotation in half-turn increments. A workpiece holding plate is provided at a position opposite to each rotary table to be slidable in a direction orthogonal to the rotating axis of the grindstone, and the workpiece holding plate is free to rotate relative to the rotary table during processing, and rotates when not being processed. Since it is clamped to the table, loading of the workpiece is easy, and it is also possible to feed the workpiece by a machine.

[Brief explanation of drawings]

1 to 3 are drawings showing a conventional double-head surface grinding device, in which FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a plan view. 4 to 6 are drawings showing a double-head surface grinding device of the present invention, in which FIG. 4 is a front view, FIG. 5 is a side view, and FIG. 6 is a plan view. 7 to 9 are drawings showing the carrier mechanism, in which FIG. 7 is a partially vertical front view of the main part, FIG. 8 is a plan view of the main part, and FIG. 9 is a side view of the main part. 33, 34...Carrier mechanism, 37...Carrier shaft, 38...
Rotating table, 39... Index motor, 44
, 44... Moving body, 45, 45... Holder, 46, 46... Workpiece holding plate, 47, 4
7... Holding hole, 48... Workpiece guide, 51... Rocking motor, 53... Arm, 56... Elevating member , 57... Oscillation motor, 59... Eccentric cam, 60...
Cam lifting cylinder, 62, 62...clamp member.・Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. In a double-head surface grinding device in which upper and lower grinding wheels are arranged with their grinding surfaces facing each other, a workpiece is indexed between the two grinding wheels, and both end faces of the workpiece are simultaneously ground by both grinding wheels. , a rotating table that rotates intermittently at predetermined times;
Two movable bodies are provided at opposite positions of the rotary table so as to be slidable in a direction perpendicular to the rotational axes of both grindstones, and each of the movable bodies is attached to each of the two movable bodies to hold the workpiece at its tip. an arm that reciprocates in a certain angle range, an elevating cylinder with a piston rod tip fixed to the arm and an elevating member fixed to the main body side, and the main body side fixed to the elevating member. an oscillation motor whose rotation shaft is slidably passed through the arm; an eccentric cam fixed to the lowermost end of the rotation shaft of the oscillation motor;
A carrier mechanism is provided on both sides of both grindstones, each consisting of a holder that fits and locks the eccentric cam fixed to the movable body, and a clamp member that fixes the movable body at a predetermined position on the rotary table. Double-headed surface grinding device.