JP3810388B2 - Double-sided milling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a double-sided side milling machine. More particularly, the present invention relates to a double-sided side milling machine for processing both front and back surfaces of a workpiece.
[0002]
[Prior art]
When processing a workpiece with a flat milling machine, the workpiece is usually clamped on a processing table and the processing table is slid with respect to the cutter. Since the cutter does not move at a fixed position and the work table slides, if the work table is moved away from the lower side of the cutter and the work is received, the work can be received by using an overhead crane or by human power. The work to put on the processing table is not so difficult. Therefore, an example in which a work loading device is provided on a milling machine does not yet exist (see Non-Patent Document 1).
[0003]
[Non-Patent Document 1]
The latest machine manufacturing pages 244 to 246 Machine manufacturing method workshop January 10, 1985 Yokendo Co., Ltd. [0004]
[Problems to be solved by the invention]
However, in a double-headed side milling machine that processes both the front and back surfaces of a workpiece at once, it is difficult to carry the workpiece from above using an overhead crane or the like as described above. The reason is based on the structural reason of the double-sided side milling machine.
That is, in the double-sided side milling machine, as shown in FIG. 7A, the processing table 103 is slidably placed on the base, and the processing head 105 equipped with the cutter 104 is placed on both the left and right sides of the base slide path. Above the processing table 103, a clamp for fixing a workpiece with the processing table 103 is disposed.
With such a basic configuration, when the workpiece W placed on the processing table 103 is fixed by the clamp mechanism 101, the left and right processing heads 105 are advanced to the processing position, and the processing table 103 is slid, both the front and back surfaces of the workpiece are once aligned. Will be processed.
However, in the above structure, the clamp occupies the upper side of the work table 103, and therefore, if the work is to be carried onto the work table 103 from above, the clamp mechanism 101 becomes in the way and is impossible. Therefore, an overhead crane etc. cannot be used effectively.
[0005]
Therefore, as shown in FIG. 7B, the present applicant pivotally supports the clamp mechanism 101 with a pin 102 so that the clamp mechanism 101 can be rotated in a horizontal plane, and the clamp mechanism 101 is swung. During this time, it was considered to carry the workpiece onto the processing table 103.
However, the above-described means requires a swiveling space for the clamp mechanism 101 at the installation location in the factory, so that there is a problem that it is difficult to introduce it in a location where there is no room. Moreover, it takes time and effort to lock and unlock the clamp each time one workpiece is processed, and there is a limit to improving productivity.
[0006]
In view of the above circumstances, an object of the present invention is to provide a double-sided side milling machine that can easily carry in and out a workpiece and improve productivity.
Another object of the present invention is to provide a double-sided side milling machine in which automation of positioning of a workpiece on the work table 103 is performed and productivity is improved.
[0007]
[Means for Solving the Problems]
The double-sided side milling machine according to claim 1 is provided with a processing table provided on the base so as to be slidable in the front-rear direction, and on the base, with the slide position of the processing table sandwiched therebetween, so as to be close to and away from each other. A pair of machining heads provided, a lower jig provided on the machining table, and a clamp provided on the machining table for raising and lowering an upper jig for pressing the workpiece downward from above. A clamping mechanism having a cylinder attached thereto; and a workpiece loading device installed on a side of the base at a preparation position before the machining start of the machining table. The workpiece loading device includes a plurality of support bars on which the workpiece is placed. When a fork and a positioning plate which is mounted so as to be parallel to the lower jig in the upper surface of the support rod several plurality, lift for raising and lowering the forks Ri Do from the structure and the forward-reverse is to advance and retreat mechanism, the lower jig, the longitudinal direction consist divided plurality of lower jig Specifically, the support rod of the fork between the lower jig concrete adjacent enters A gap is formed .
[ 0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic plan view of a double-sided side milling machine of this embodiment. FIG. 2 is a side view of the double-sided side milling machine shown in FIG. First, the basic configuration of the double-sided side milling machine of this embodiment will be described with reference to FIGS. 1 and 2.
[0009]
Reference numeral 1 denotes a base. On the upper surface of the base 1, a processing table 2 is provided so as to be slidable forward and backward (vertical direction in FIG. 1) with respect to the base 1.
Reference numeral 7 denotes a screw rod that slides the processing table 2, and 8 denotes a motor that rotates the screw rod 7. The processing table 2 is guided to slide by rails, but is not shown. 9 is a telescopic cover provided to prevent chips, and is disposed before and after the processing table 2.
A lower jig 3 for placing the workpiece W is provided on the processing table 2. Further, a clamp frame 4 is erected above the processing table 2, and a plurality of upper clamp cylinders 5 are attached to the upper frame. The rod of the clamp cylinder 5 is disposed vertically downward, and an upper jig 6 is provided at the tip of the rod.
For this reason, if the clamp cylinder 5 is extended, the workpiece W is sandwiched between the lower jig 3 and the upper jig 6, so that the workpiece W can be fixed to the processing table 2. Moreover, if the work table 2 is moved back and forth, the work W can be moved back and forth together with the work table 2 while the work W is sandwiched between the upper jig 6 and the lower jig 3.
[0010]
On the upper surface of the base 1, a pair of rails 14, 14 are provided in the left-right direction across the slide position of the processing table 2.
The headstocks 11 and 11 of the pair of left and right machining heads 10 and 10 are respectively attached to the upper surfaces of the pair of rails 14 and 14. Each head stock 11 moves to the left and right on the rail 14 and can approach and separate from each other.
A pair of main shafts are rotatably supported on the pair of main spindle bases 11 and 11, respectively, and the pair of main shafts are provided horizontally so that their axis centers coincide with each other. A cutter 15 is attached to one end portion of the pair of main shafts, and the other end portion of each main shaft is connected to the main shaft of the motor 13 provided on the upper portion of the head stock 11 by, for example, a belt. It is connected.
For this reason, when the motor 13 is driven, the main shaft rotates and the cutter 15 rotates.
[0011]
According to the double-sided side milling machine of the above embodiment, the workpiece W is attached to the machining table 2, the pair of machining heads 10, 10 are moved toward the machining table 2 by the amount of machining the workpiece W, and the motor 13 is driven. If the cutter 15 is rotated and the workpiece W is sent to the cutter 15 by the processing table 2, both the left and right sides of the workpiece W can be cut at a time by the cutter 15.
[0012]
Next, the workpiece carry-in apparatus A that is a feature of the present invention will be described.
In FIG. 1, the processing table 2 is located at a preparation position I before starting processing. 2 indicates the machining end position, and the two-dot chain line indicates the clamp frame 4 and the workpiece W that have moved to the machining end position. A workpiece carry-in apparatus A shown in FIG. 1 is installed on the side of the processing table 2 at the preparation position I.
As shown in FIG. 3, main components of the work loading apparatus A include a fork 20 having a plurality of support bars 21 for placing a work, an elevating mechanism for moving the fork 20 up and down, and an advancing / retracting mechanism for moving the fork forward and backward. It consists of.
[0013]
First, the fork 20 will be described in detail. The fork 20 is composed of a base 22 having a substantially trapezoidal shape in plan view, in which six support rods 21 are arranged in parallel, and each support rod 21 is fixed.
A positioning plate 23 having an L-shaped cross section is mounted on the base 22 in the vicinity of the base of each support rod 21.
[0014]
Next, the lifting mechanism 30 will be described with reference to FIGS. 4 and 5.
A slide rail 24 is fixed from the lower surface of each support rod 21 to the lower surface of the base plate 22, and a slide guide 31 slidably fitted to the slide rail 24 is attached to an elevating table 32. Yes. A hydraulic lift cylinder 34 is attached between the lift table 32 and the base 33. Further, guide rods 35 are attached to both ends of the lifting table 32 so as to move up and down in a guide tube 36 provided on the base side. Therefore, when the elevating cylinder 34 is expanded and contracted, the elevating table 32 is raised and lowered, and the fork 20 can be raised and lowered.
[0015]
Furthermore, the advance / retreat mechanism 40 of the fork 20 will be described.
The elevating table 32 has a front table 32a and a rear table 32b, and both members are connected by a connecting member (not shown).
A screw rod 41 is disposed between the front table 32a and the rear table 32b of the lift table 32, and the screw rod 41 is rotated by a motor 42 attached to the rear table 32b. A nut 43 is screwed onto the screw rod 41, and the nut 43 is fixed to the base 22 of the fork 20 with a bracket 44.
For this reason, when the screw rod 41 is rotated forward and backward by the motor 42, the fork 20 can be moved forward and backward.
[0016]
Returning to FIG. 3, the assembly of the support bar 21 of the fork 20 and the lower jig 3 will be described.
The lower jig 3 includes a plurality of lower jig bodies 3a to 3f and is arranged in series in the longitudinal direction. And the clearance gap is provided between each lower jig | tool bodies 3a-3f. This gap is a space into which the support bar 21 of the fork 20 enters.
Even if the lower jig 3 is divided and has a gap, it can support most of the lower end surface of the workpiece, so there is no problem in clamping the workpiece with the upper jig 6. Is.
[0017]
Next, the work loading / unloading work by the work loading device A will be described with reference to FIG. 6 (1) to (6), the left side is a side view of the fork 20, and the right side is a front view.
(1) The fork 20 has been lifted from the standby position.
(2) The fork 20 moves forward and protrudes forward from the lower jig 3, that is, the operation side (side on which the worker performs various operations). In this state, since it advances from the clamp cylinder 5 etc. which are located above the lower jig 3, the space above the support bar 21 is open.
(3) The work W is placed on the support rod 21. Since the space above the support bar 21 is open as described above, it is possible to easily carry out the work of carrying the workpiece onto the support bar 21 using an overhead crane or any other handling device.
(4) The fork 20 is retracted to the clamp position. At this time, the retracted position of the positioning plate 23 is a position where the center of the workpiece W can be placed on the lower jig 3. The retracted position is determined by the width of the workpiece W and the mounting position of the positioning plate 23, and can be accurately controlled by the number of rotations of the screw rod 41.
(5) The fork 20 is lowered. At this time, since the support bar 21 enters the gap between the lower jigs 3, the workpiece W can be placed on the lower jig 3.
(6) Then, the fork 20 is moved backward and lowered to the initial standby position.
(7) When the fork 20 is retracted, the upper jig 6 is lowered by the clamp cylinder 5, and the workpiece W is clamped between the lower jig 3. As a result, the workpiece W can be machined.
[0018]
Since it is as mentioned above, since a workpiece | work can be carried in easily and rapidly, productivity improves.
Further, since the work can be placed on the support bar 21 and protruded to the operation side when the work is carried out after the processing, the carrying out work is facilitated.
[0019]
【The invention's effect】
According to invention of Claim 1 , there exists the following effect.
a) When the fork of the work carry-in device is advanced by the advance / retreat mechanism, it can be protruded laterally from the work table, so that the work can be placed on the fork without being obstructed by the clamp mechanism above the work table. When the fork is retracted and lowered, the workpiece can be placed on the lower jig. Further, since the unloading can be carried out without being obstructed by the clamping mechanism, the loading of the workpiece is considerably automated and the productivity is improved.
b) Since the fork support bar can enter the gap between the lower jig bodies, the workpiece can be placed directly on the lower jig by lowering the fork, and the processed workpiece is the fork support bar. It can also be taken. For this reason, the work loading / unloading work can be performed in a shorter time.
c) Using the positioning plate, the workpiece can always be placed at a fixed position on the fork. For this reason, by monitoring and controlling the amount of movement of the fork, in other words, the amount of movement of the advance / retreat mechanism, it is possible to accurately position the workpiece on the lower jig, thereby improving productivity.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a double-sided side milling machine according to an embodiment of the present invention.
2 is a side view of the double-sided side milling machine shown in FIG. 1. FIG.
3 is a perspective view around the fork 20 shown in FIG. 1. FIG.
FIG. 4 is a front view of the carry-in device. FIG. 5 is a side sectional view of the carry-in device.
FIG. 6 is an operation explanatory diagram of a carry-in mechanism.
FIG. 7 is an explanatory view of a work loading operation in a conventional double-sided side milling machine.
[Explanation of symbols]
3 Lower jig 5 Clamp cylinder 10 Processing head 20 Fork 21 Support rod 22 Base 30 Lifting mechanism 40 Advance / Retreat mechanism

Claims (1)

On the base, a processing table that is slidable in the front-rear direction,
A pair of processing heads provided on the base so as to be close to and away from each other in the left-right direction across the slide position of the processing table,
A lower jig on the processing table for placing a workpiece;
A clamp mechanism provided with a clamp cylinder that is provided above the processing table and moves up and down an upper jig for pressing the workpiece downward from above;
In the base, comprising a work loading device installed on the side in the preparation position before the processing start of the processing table,
The workpiece carry-in device is
A fork comprising a plurality of support rods on which a workpiece is placed, and a positioning plate mounted on the upper surface of the plurality of support rods so as to be parallel to the lower jig ;
Ri Do and a lifting mechanism and the forward-reverse is to advance and retreat mechanism for raising and lowering the forks,
The lower jig is composed of a plurality of lower jig bodies divided in the longitudinal direction, and a gap is formed between the adjacent lower jig bodies for the support rod of the fork to enter. Characteristic double-sided side milling machine .

Images