JPS6044082B2 - Workpiece changing device in vertical lathe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece changing device configured to automatically load and unload the workpiece to and from the rotary table in a vertical lathe that cuts the workpiece by attaching the workpiece to the rotary table. The front of the column provided on the rear side is made into two intersecting planes, and a saddle that holds the cutting tool bar horizontally is mounted on the intersecting plane so that it can be raised and lowered freely. A carriage is mounted on the handle, and the related parts are arranged so that the center of the grip crosses directly above the center of the rotary table, and when the cutter bar held in the saddle is moved back, it protrudes above the rotary table. There are no objects, and the gripper can move up and down and move freely above the rotary table, and the workpiece can be placed concentrically with the rotary table, which allows automatic workpiece exchange on a vertical lathe. As a result, we succeeded in significantly improving work efficiency and safety.

In the embodiment shown in FIGS. 1 to 3, A is a vertical lathe for rough machining, with a circular bed 2 on which a rotary table 1 is installed on the floor.
The workpiece W is mounted on the top surface and rotated at high speed.

Reference numeral 3 denotes a column established on the rear side of the rotary table 1. The front surface of the upper part of the column is formed into two planes that intersect at an arbitrary angle, and vertical guide surfaces 4 and 5 are provided on each intersecting plane 3a and 3b to form a saddle. 6 and 7 are mounted so that they can be freely raised and lowered, and the saddles 6 and 7 respectively horizontally hold cutter rods 8 and 9 facing upward from the center of the rotary table 1, and a cutting tool (not shown) is attached to the tip thereof.

B is a finishing vertical lathe placed side by side on the left side of the vertical lathe A, a workpiece "W2" is mounted on a rotary table 11 placed on a circular bed 12, and the front of the upper part of the column 13 is made into two intersecting surfaces 13a and 13b. Saddles 16 and 17 are mounted on the guide surfaces 14 and 15 in the vertical direction at each intersection so that they can rise and fall freely, and each saddle horizontally holds a knife bar 18 and 19 that points upward from the center of the rotary table 11. Attach a cutting tool (not shown) to the vertical lathes A and B.
And 13a, 13b made saddles 6, 7 and saddle 16
, 17 are mounted so that they can be raised and lowered freely, and the blade rods 8, 9 and 18, 19 are held horizontally on each saddle, so when each blade rod is retreated, there is no protrusion above the rotary tables 1, 11. It can be in a state where there is no. In addition, both vertical lathes A and B are equipped with a tightening device that automatically attaches and detaches the workpiece and a control device that incorporates a machining cycle (both not shown).
When the workpiece is placed on the rotary table, the workpiece is tightened and then the rotary table rotates at high speed. According to a predetermined machining cycle, the saddle moves up and down and the cutting tool bar moves back and forth to cut the workpiece. When stopped, the workpiece is untightened and released. Two bases 20... are installed on the floor on the right side of column 3 and the left side of column 13, and supports 21 to 24 are established on each base, and the rear girder 25 and horizontal The girders 26, 26 are connected, and a rail 27 projecting to both sides is attached to the top end of the front support column in the left-right direction, and protrusions 28, 28 are provided at the top and bottom of the front surface over the entire length of the rail 27.

C. (5D is a loading conveyor and an unloading conveyor that form part of the transfer line. Loading conveyor C is located on the right side of vertical lathe A and is arranged in the front-back direction, and unloading conveyor D is located on the left side of vertical lathe B and is arranged in the front-back direction. Distance M between the center of the end of the carry-in conveyor C and the center of the rotary table 1, and distance M between the center of the end of the carry-in conveyor D and the center of the rotary table 1.
Rotary tables 1 and 11 and conveyors C and D are arranged so that the distance N from the center of rotary table 1 is equal to the center distance L of rotary tables 1 and 11, and their centers are aligned on a straight line parallel to rail 27. do. 30, 31, 32 are three carriages mounted on the front surface of the rail 27, and upper and lower protrusions 28, 2
8 and put the trochanters 33, 33 on the side edges of the rail,
Vertical cylinders 34 and 36 fixed perpendicularly to the front surface of each carriage are connected together by a horizontal bar 37, and the three carriages 30 to 32 are moved together by an operating cylinder 38 built into the rail.

40 to 42 are vertical lifting rods inserted into the vertical cylinders 34 to 36 of each carriage, respectively, and the workpieces W that have reached the terminal end of the carry-in conveyor C are driven by a hydraulic cylinder (not shown).
A gripper 43 that moves up and down with respect to the center of O and each center of the rotary tables 1 and 11, and automatically grips or releases a workpiece at the lower end.
~45, and the grippers 43~45 are the carriage 4.
0 to 42, each member is arranged so that the center of each gripper passes directly above the straight line connecting the centers of the rotary tables 1 and 11.

One embodiment of the present invention has the above-described configuration. Initially, the carriages 30 to 32 take a position where the carriage 30 is attached to the right end of the rail 7 as shown in the figure, and the center of the gripper 43 is placed at the center of the end of the carry-in conveyor C. The vertical lathe A is placed on standby with the saddles 6 and 7 in the raised position and the cutter rods 8 and 9 are retracted so that there are no protruding objects above the rotary table 1, and the workpiece W to be machined is placed on standby.

is placed on the carry-in conveyor C and intermittently fed to the right side of the vertical lathe A. Work W. When the material reaches the end of the carry-in conveyor C, the lifting rod 40 descends together with the gripper 43, and this gripper holds the workpiece W. When the lifting rod 40 is grabbed, the lifting rod 40 rises slightly and lifts the workpiece W.
. The operating cylinder 38 lifts the carriage 30~
32 to the left by a distance M, and the carriage 30 is moved to a position where the center of the gripper 43 is directed toward the center of the rotary table 1.
~32 is stopped. Subsequently, when the lifting rod 40 is lowered, since there is no protrusion above the rotary table 1, the gripper 4
3 and Work W. descends without any trouble and places the workpiece on rotary table 1 (this workpiece is designated as W1). Then, the gripper 43 releases the workpiece a, moves up along with the lifting rod 40, and then moves the carriage 3 by the actuating cylinder 38.
0 to 32 and returns to the illustrated standby position. In the vertical lathe A, when the workpiece W1 is placed on the rotary table 1, the tightening device (
(not shown) automatically tightens and fixes the workpiece, a control device (not shown) operates to rotate the rotary table 1 at high speed, and the saddles 6 and 7 are rotated simultaneously or at different times according to a predetermined machining cycle. The tool bar 8 or 9 advances and roughens the circumferential surface and upper surface of the workpiece W1 with a cutting tool. l
When the rough machining of the workpiece W1 is completed, the rotary table 1 stops, the tightening device releases the workpiece W1, the cutting rods 8 and 9 retreat, and then the saddles 6 and 7 rise once, and a protruding object is placed above the rotary table. After removing the lifting rods 40 and 41
descends, and the gripper 43 picks up a new workpiece W at the end of the carry-in conveyor C. At the same time, the gripper 44 grips the rough-machined workpiece W1 on the rotary table 1, and then the lifting rods 40, 4
1 rises a little to levitate each workpiece, the actuating cylinder 38 operates to move the carriages 30 to 32 to the left by the center distance L of the rotary table, and the lifting rods 40 and 41 descend again to lift the workpieces W. is placed on the rotary table 1, and the workpiece W1 is placed on the rotary table 11 (the workpieces placed on the rotary tables 1 and 11 are referred to as Wl and W2, respectively).
. When the grippers 43 and 44 release the workpieces Wl and W2, they rise along with the lifting rods 40 and 41, and then move to the operating cylinder 38.
The carriages 30 to 32 are returned to the illustrated standby position. In the vertical lathes A and B, when new workpieces Wl and W2 are placed on the rotary tables 1 and 11, respectively, the tightening device automatically fixes the workpieces, and then the control device operates to rotate the rotary tables 1 and 11 at high speed to achieve a predetermined position. According to the machining cycle, the saddles 6, 7 and the saddles 16, 17 are lowered simultaneously or with a time difference, and the cutter rods 8, 9 advance to roughly machine the circumferential surface and upper surface of the workpiece W1. 18 and 19 also move forward to finish the peripheral and upper surfaces of the workpiece W2. Work W
When the machining of Wl and W2 is completed, the rotary tables 1 and 11 stop, the tightening device releases the workpieces Wl and W2, and the cutting tool bar 8
, 9 and the cutter rods 18, 19 move back to rotate the rotary tables 1, 1.
After ensuring that there are no protruding objects above 1, the saddles 6, 7 and 16, 17 rise once, and then the lifting rod 40,
41 and 42 descend, and grippers 43, 44, and 45 respectively hold new workpieces W.

, rough-machined workpiece W1, finish-machined workpiece W
2, and then the lifting rods 40 to 42 rise a little to levitate each workpiece a little, and the actuating cylinder 38 works to move the carriages 30, 31, 32 to the center distance L of the rotary table.
The lifting rods 40 to 42 descend again to pick up the workpiece W. is placed on the rotary table 1, the work W1 is placed on the rotary table 11, and the work W2 is placed on the end of the carry-out conveyor D. When the grippers 43 to 45 release the works WO, Wl, and W2, they are moved along with the lifting rods 40 to 42. After rising, the operating cylinder 38 returns the carriages 30 to 32 to the illustrated standby position. Vertical lathes A and B are rotary tables 1 and 1.
When new workpieces Wl and W2 are respectively placed on the workpieces 1 and 1, the workpieces are automatically fixed at the tightening position, and then the control device operates to rotate the rotary tables 1 and 11 at high speed, and the saddles 6 and 7 and the saddles 16 and 17 are lowered. The knife rods 8, 9 and the knife rod 18
, 19 advances and performs new rough machining and finishing machining on the workpieces W1 and W2, and the carry-out conveyor D sends out the finished workpieces. The above operations are repeated one after another, and the workpiece sent in by the carry-in conveyor C is sequentially rough-machined and finished by the vertical lathe A (5B), and when the machining is completed, the workpiece is exchanged and sent out by the carry-out conveyor D. Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and the design can be changed within the gist of the invention.
For example, in the embodiment, a vertical lathe A for rough machining and a vertical lathe B for finishing machining are arranged, and three elevating rods each having a workpiece gripper at the lower end are arranged, but only one vertical lathe or vertical lathe B is installed. The present invention can also be applied to the case of three or more units by changing the number of lifting bars with grips. In the present invention, two
A saddle that holds the cutter bar horizontally is mounted on this intersecting plane so that it can be raised and lowered freely, and a carriage of the lifting bar with a grip is mounted on the rail above the rotary table. The related parts are arranged so that the blade crosses directly above the center of the rotary table, and when the blade rod held in the saddle is moved back, there is no protrusion above the rotary table, so the gripper is It is possible to move up and down freely above the rotary table, and it is also possible to place workpieces concentrically with respect to the rotary table, which makes it possible to automatically exchange workpieces on a vertical lathe. This has the effect of significantly improving the working efficiency and safety of vertical lathes.

[Brief explanation of the drawing]

The drawings show one embodiment of the apparatus of the present invention, and FIG. 1 is a plan view of the embodiment, FIG. 2 is a front view thereof, and FIG. 3 is a side view seen from the right side of FIG. 2.

Claims (1)

[Claims] 1. The front of the column established on the rear side of the rotary table is made into two intersecting planes, and a saddle that holds the cutter rod horizontally is mounted on one or both of these intersecting planes so that it can be freely raised and lowered, and above the rotary table. A carriage is mounted on the left and right rails provided on the turret, and a lift bar with a workpiece gripper at the bottom end is mounted vertically on this carriage, so that the center of the gripper crosses directly above the center of the rotary table. A workpiece changing device for a vertical lathe, characterized in that related members are arranged as follows.