JPH0340531Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a vertical double-head surface grinder that carries a workpiece between a pair of upper and lower grinding wheels that are rotationally driven, and simultaneously grinds both sides of the workpiece with both grinding wheels. It is.

Prior Art As an example of the above-mentioned vertical double-head surface grinder, the 10th
Structures shown in FIGS. 1 to 12 are known. This vertical double-head surface grinder has main body frame 1
A pair of sleeves 2 and 3, which are movable in the vertical direction via a worm or the like by a suitable drive device (not shown), are disposed coaxially and vertically opposed to each other, and both sleeves 2 and 3 are disposed coaxially and vertically opposite each other. , 3 rotatably support spindles (not shown) which are rotatably driven by motors 4, 5 via winding transmissions 6, 7 such as belts, and the corresponding shaft ends of both spindles are rotatably supported. , the grinding wheels 8 and 9 are mounted with their grinding surfaces facing each other, and a carrier frame 10 integrally formed on the front surface of the main body frame 1 is provided with a carrier frame 10 that swings back and forth within a predetermined angle range within a plane orthogonal to the axis of the grinding wheels. A movable rotating arm 11 is disposed such that a part of its periphery is overlapped between both grinding wheels 8 and 9, and a workpiece is carried by the arm 11 between both grinding wheels 8 and 9 which are rotationally driven, and both sides of the workpiece are Both whetstones 8 and 9
It is configured so that the grinding process is carried out at the same time.

Problems to be Solved by the Invention Incidentally, in the above-mentioned vertical double-head surface grinder, the grindstone replacement and dressing, machine cleaning, maintenance, etc. are all performed through a window 12 opened on the side of the main body frame 1. . However, since the window 12 opened on the side surface of the main body frame 1 is small, there is a drawback that the working space from the window 12 is restricted. Therefore, for example, when replacing a whetstone, if the work space from the window 12 is restricted, the weight of each whetstone is 50 to 80 kg, so the replacement work is extremely dangerous, and the time and effort required for it are large. In the past, workability was poor.

In the above-mentioned vertical double-head surface grinder, the workpiece is given rotational motion in order to improve the grinding efficiency of the workpiece. That is, a workpiece pocket gear that holds a workpiece eccentrically is rotatably supported on the swing arm 11, and the workpiece pocket gear and a drive motor are connected through an appropriate transmission means, and the drive motor is connected to the workpiece pocket gear through an appropriate transmission means. By rotating the workpiece pocket gear, rotational motion is applied to the workpiece. In this case, if the thickness of the workpiece to be ground is thin, the thickness of the rotating arm 11 will also be correspondingly thinner, making it impossible to support the workpiece pocket gear via a bearing or the like due to its size. For this reason, a rotational support surface is provided on a part of the work pocket gear, and this rotational support surface is placed on and supported by the swing arm 11. However,
Since the work pocket gear slides and rotates with respect to the swing arm, there is a drawback that the contact portion between the work pocket gear and the swing arm quickly wears out. Particularly, when grinding stone powder, grinding debris, etc. enter the contact area between the work pocket gear and the swing arm during grinding, the wear is significant. When the wear of the contact area between the work pocket gear and the swing arm increases, the contact area becomes looser and the meshing of the gears deteriorates, causing uneven rotation or stopping. This was a cause of defects in grinding accuracy. Therefore, conventionally hardened steel or cemented carbide has been used for the contact parts, but these have not been very effective.

Means for Solving the Problems This invention was proposed in view of the above problems, and consists of a main body frame in which two rotating grindstones are arranged facing each other on the same axis, and a workpiece held on both sides of the main body frame. A mechanism that rotates a rotating arm that indexes between grinding wheels to give the workpiece orbital motion in the indexing direction, a mechanism that rotates a pocket gear that holds the workpiece in the rotating arm and gives the workpiece rotational motion, and a rotating arm are provided. It consists of a carrier device having a mechanism for reciprocating a block to give oscillation motion to a workpiece, and a carrier frame to which the carrier device is attached, and the carrier frame is attached to the main body frame at a certain point of the main body frame. , or it is installed so that it can be opened and closed in a direction perpendicular to the axis of the grindstone using a point outside the main body frame as a fulcrum.

In addition, this invention provides a wear-resistant material whose surface is made of fine ceramic such as oxidized, nitrided, or carbonized ceramic on the rotating contact surfaces of both the workpiece pocket gear that holds the workpiece and the rotating arm that comes into contact with the workpiece pocket gear. It is something that

Function: With the above configuration, the carrier frame on the front side of the main body frame can be opened and closed in a direction orthogonal to the grinding wheel axis, and wear on the rotating contact surfaces of the work pocket gear and the swing arm is improved.

Embodiment Figures 1 to 3 are schematic external views of a vertical double-head surface grinder according to this invention, with Figure 1 being a front view and Figure 2 being a front view.
The figure shows a side view, and FIG. 3 shows a plan view. In the figure, 21 is a main body frame, and a pair of sleeves 22 and 23, which can be moved vertically via a worm or the like by an appropriate drive device (not shown), are arranged coaxially and vertically opposite each other. and spindles (not shown) rotatably driven by motors 24 and 25 to rotate winding transmission devices 26 and 27 such as belts are rotatably supported in both sleeves 22 and 23, respectively. Grinding wheels 28, 2 are mounted on corresponding shaft ends of both spindles with their grinding surfaces facing each other.
9 are installed respectively.

A carrier frame 30 is attached to the front of the main body frame 21 so as to be openable and closable, and the two grindstones 28,
A carrier device 31 for carrying a workpiece is disposed between 29 and 29. The carrier frame 30 has one end pivotally connected to the main body frame 21 via an opening/closing rotating shaft 32, the other end locked to the main body frame 21 via a hinge bolt 33 and a tightening handle 34, and the other end By releasing the locking by the hinge bolt 33 and the tightening handle 34, the main body frame 21 can be opened and closed using the opening/closing rotating shaft 32 as a fulcrum. The opening/closing rotating shaft 32
As shown in FIGS. 4 and 5, the main body frame 21 is pivotally attached to the main body frame 21 with a pin 35 as a fulcrum, and is normally attached to the main body frame 21 with a tightening bolt 36.
It is rotatably supported via a bearing 38 on a base 37 fixed to the base 37 . In addition, the hinge bolt 33
As shown in FIG. 6, the carrier frame 30 is pivotally attached to a bracket 39 fixed to a part of the main body frame 21 via a pin 40, and is inserted into a notch 41 provided at the other end of the carrier frame 30 and attached to the tip. By tightening the screwed tightening handle 34, the other end of the carrier frame 30 is locked and fixed to the main body frame 21. In addition, 42 in FIG. 6 is the main body frame 21.
A safety switch for confirming closing is disposed inside the main body frame 21 and is activated by a protrusion rod 43 protruding from the other end of the carrier frame 30 when the carrier frame 30 is securely closed to the main body frame 21.

Next, as shown in FIGS. 7 and 8, the carrier device 31 has a pair of guide rods 44 fixedly supported at both ends by brackets 45 and arranged in parallel on the carrier frame 30. A bearing block 46 is slidably supported on a rod 44, and
A pair of receiving members 47 are attached and fixed to the sides of the bearing block 46, and an oscillation motor is attached and fixed to the output shaft 49 of an oscillation drive motor 48 that is attached and fixed to a part of the carrier frame 30 to the pair of receiving members 47. The eccentric cam 50 is held. A cylindrical carrier shaft 52 is rotatably supported on the bearing block 46 via a bearing 51, and the swing arm 5 is mounted on a swing arm mounting plate 53 which is integrally attached and fixed to the upper end of the carrier shaft 52.
4 is attached and fixed via a mounting bolt 55, and a rack 57 connected to an arm rotation cylinder (not shown) is engaged with a carrier gear 56 that is integrally attached and fixed to the lower end of the carrier shaft 52. Furthermore, a bearing 58 is provided within the carrier shaft 52.
A drive shaft 59 is rotatably supported through the drive shaft 59, a work rotation drive motor 61 is connected to the lower end of the drive shaft 59 via a universal joint 60, and a drive gear 62 is integrally connected to the upper end of the drive shaft 59. A work pocket gear 64 is fixedly attached to the drive gear 62 and is rotatably held in a gear holding circular hole 63 provided at the tip of the swing arm 54.
are interlocked through. As shown in FIG. 9, the work pocket gear 64 forms a work pocket 66 for accommodating and holding a work, and also forms a rotation support surface 67 on the outer periphery.
is rotatably supported by the rotating arm 54 by being held by the upper surface of the rotating arm 54 around the gear holding circular hole 63 and the lower surface of a work pocket gear guide 68 which is fixedly attached to the rotating arm 54. Also, the rotating contact surface between the work pocket gear 64, the swing arm 54, and the work pocket gear guide 68, that is,
An oxidation system,
A wear-resistant material 69 made of fine ceramics such as nitrided or carbonized ceramics is pasted.

In the carrier device 31 configured as described above, first, the arm rotation cylinder is driven to rotate the rack 57.
The carrier shaft 52 is rotated via the carrier gear 56, thereby the rotating arm 54 is rotated by a predetermined angle via the rotating arm mounting plate 53, and the workpiece accommodated and held in the workpiece pocket 66 of the workpiece pocket gear 64 is moved between both sides. An index is placed between the grindstones 28 and 29. Thereafter, the arm turning cylinder first reciprocates the work intermittently with a stroke much smaller than the stroke indexed between the two grindstones 28 and 29, and the rack 57, carrier gear 56,
The rotating arm 54 is swung through the carrier shaft 52 and the rotating arm mounting plate 53 to give the workpiece a revolution movement in the index direction. Then, both surfaces of the workpiece are simultaneously ground by both grindstones 28 and 29 while rotating in the index direction.

At the same time, the oscillation drive motor 48
When the oscillation eccentric cam 50 is rotated, the bearing block 46 reciprocates in the horizontal direction along the pair of guide rods 44. The swing arm 54 reciprocates to cause the work pocket gear 64 to reciprocate, thereby imparting oscillation motion to the workpiece accommodated and held in the work pocket 66 of the work pocket gear 64. Furthermore, when the work rotation drive motor 61 is simultaneously driven to rotate the drive shaft 59 via the universal joint 60, the drive gear 62
and the work pocket gear 6 via the intermediate gear 65.
4 rotates, imparting rotational motion to the workpiece accommodated and held within the workpiece pocket 66 of the workpocket gear 64.

As mentioned above, grinding on both sides of a workpiece involves three movements consisting of revolution movement in the index direction of the workpiece, rotation movement, and oscillation movement, and two grinding wheels 2 and 3.
8 and 29, thereby increasing the amount of grinding and enabling highly accurate and highly efficient grinding.

Effects of the invention As explained above, this invention allows the carrier frame to be opened and closed in the direction perpendicular to the grinding wheel axis in front of the main body frame, so the work space is not restricted, and the work space is not limited to replacing or dressing the grinding wheel.
Cleaning and maintenance of the machine can be done very easily. In particular, the weight per piece is 50 to 80 kg.
In some cases of grindstone replacement, a forklift or the like can be used, significantly improving work efficiency and safety. In addition, a wear-resistant member whose at least the surface is made of fine ceramics such as oxidized, nitrided, or carbonized is used on the rotating contact surfaces of the work pocket gear and the rotating arm that comes into contact with the work pocket gear as it rotates. Therefore, wear on the rotating contact surface can be improved, rotation becomes smoother, and grinding accuracy can be improved.

[Brief explanation of the drawing]

Figures 1 to 3 are schematic external views of the vertical double-head surface grinder according to this invention, with Figure 1 being a front view and Figure 2 being a front view.
The figure shows a side view, and FIG. 3 shows a plan view. Figure 4 is an enlarged front view of the carrier frame with the intermediate part omitted and the main parts cut away, Figures 5 and 6 are the left side view and right sectional view of the carrier frame shown in Figure 4; Fig. 7 is an enlarged plan view of the carrier device, Fig. 8 is a longitudinal sectional view of its main parts, Fig. 9 is an enlarged sectional view of the work pocket gear, and Figs. 10 to 12 are views of a conventional vertical double-head surface grinder. 10 is a front view, FIG. 11 is a side view, and FIG. 12 is a plan view. 21...Main frame, 28, 29...Whetstone,
30...Carrier frame, 31...Carrier device, 32...Rotating shaft for opening/closing, 33...Hinge bolt, 34...Tightening handle, 46...Bearing block, 50...Oscillation eccentric cam, 52...
Carrier shaft, 53...Swivel arm mounting board, 54...
...Swivel arm, 56...Carrier gear, 57...
Rack, 59... Drive shaft, 60... Universal joint, 6
DESCRIPTION OF SYMBOLS 1... Work rotation drive motor, 62... Drive gear, 64... Work pocket gear, 66... Work pocket, 69... Wear-resistant material.

Claims (1)

[Claims for Utility Model Registration] (1) A main body frame in which two rotating grindstones are coaxially arranged facing each other, and a rotating arm that holds a workpiece and indexes it between both grindstones of the main body frame are oscillated to produce a workpiece. A mechanism that gives the workpiece orbital motion in the index direction, a mechanism that gives the workpiece rotational motion by rotating a pocket gear that holds the workpiece in a rotating arm, and a mechanism that gives oscillation motion to the workpiece by reciprocating a block equipped with the rotating arm. and a carrier frame to which the carrier device is assembled, the carrier frame being attached to the main body frame at a point on the main body frame, or a point outside the main body frame as a fulcrum, and aligned with the grinding wheel axis. A vertical double-head surface grinder characterized by being installed so that it can be opened and closed in orthogonal directions. (2) At least the surface of the workpiece pocket gear that holds the workpiece and the rotating arm that comes into contact with the rotating contact surface are provided with a wear-resistant material made of fine ceramic such as oxidized, nitrided, or carbonized ceramic. A vertical double-head surface grinder as set forth in claim 1 of the utility model registration claim, characterized in that: