JPS6228563A - moving mechanism - Google Patents

Abstract

PURPOSE:To arbitrarily transfer the transfer bodies by connecting a motor and a ball nut to a rotary body rotatably installed onto the transfer body and connecting a motor to the ball nut through a ball screw. CONSTITUTION:A ball screw 73 is revolved by the first motor 64 is allowed to penetrate through the first transfer body 68 and the second transfer body 69 by the first motor 64, and the first and the second ball nuts 75 and 76 are screwed onto the ball screw 73. The first ball nut 75 is fixed onto the first transfer body 68, and the second ball nut 76 is fixed onto a rotary body 77 rotatably installed onto the second transfer body. Since the rotary body 77 is connected to the second motor 65, the both transfer bodies 68 and 69 can be arbitrarily transferred by properly revolving the first and the second motors 64 and 65.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a moving mechanism that allows a pair of moving bodies to move synchronously and separately.

(Prior art) The cam 117 on the 6th, It is known to improve wear resistance.

Conventionally, when performing such remelting hardening treatment on a member to be treated such as a camshaft, one plasma torch is used to remelt the member to be treated.

(Problems to be Solved by the Invention) For example, in the case of a camshaft as a member to be treated, there are a plurality of camshaft parts to be subjected to remelting and hardening treatment, and one plasma torch is used as described above. If the remelting and hardening treatment is then performed, there is an inconvenience that the treatment takes time.

Therefore, for example, it is conceivable to arrange two plasma torches in parallel to treat two camshaft sections at the same time.

However, even if this method is used, it cannot be applied if the spacing between the cam lift parts of the camshaft is not constant.
There is a disadvantage that processing efficiency cannot be improved.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides first. A moving mechanism including a second moving body has a ball screw rotated by a first motor passing through the first and second moving bodies, and first and second ball nuts are screwed into the ball screw, The first ball nut is fixed to the first moving body, and the second ball nut is fixed to a rotating body rotatably attached to the second moving body, and this rotating body is rotated by a second motor. I made it.

(Operation) By driving the first motor, the first and second moving bodies move synchronously, and by driving the second motor, the second moving bodies move individually.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side view of a remelting and hardening processing apparatus equipped with a moving mechanism according to the present invention, and FIG. 2 is a front view of the apparatus. The remelting and hardening treatment apparatus (1) has a frame (2) set up on the floor, a support box (3) containing a power supply etc. is fixed to this frame (2), and a control box (3) is installed behind this support box. 4), a cooling device (5) above, and a plasma power supply box (Ei) on the left and right of this cooling device (5).
, (B) are arranged.

In addition, the remelting and hardening treatment apparatus (1) includes a loading and unloading station (S+) for loading and unloading the workpiece (Ill) such as a camshaft, and a preheating station (S2) for preheating the workpiece (Ill). and a heating station (S3) for remelting the workpiece (S), and each of these stations (Sθ, (S2), (
A rotating shaft (7) is arranged at an intermediate position of S:l). This rotating shaft (7) is rotated via a motor (8) fixed to the support box (3) and a speed reduction mechanism, and the amount of rotation is controlled intermittently by, for example, 120' in accordance with a signal from the control box (0). The rotation shall be as follows.

A case (9) having a substantially hexagonal shape in side view is provided in the center of the rotating shaft (7), and three arms (10) project outward from the case (9). There is. These arms (10) are attached at a distance of 120 degrees from each other, and a clamp mechanism (11) is provided at the tip of each arm (10).

This clamp mechanism (11) is attached to the case (11) as shown in Fig. 3.
9) The rod (
13) to the left and right members (10) constituting the arm (10).
a) and (10a), and attach fingers (14) to the tips of these left and right members (10a) and (loa).
, (15) are pivotally connected, and these fingers (1
4), link the rear ends of (15) (1B), (1B)
The fingers (14) and (15) are opened by operating the cylinder (22) (12) and causing the rod (13) to project.
Release the grip on the workpiece (W) and remove the rod (13).
The fingers (14), (
15) is closed to grip the member to be processed (W). The tip of one finger (15) faces the workpiece (W) (4-I~m/IC-)
LTh -I all -t l -/
# (+A1 (15)) Even after a slight delay, the member to be processed (ill) did not fall.

It is rotatably held between the bifurcated i'1ll (15a) and the finger (14), and the finger (14),
When (+5) is closed, the member to be processed (W) is clamped at three points so that the center of the member to be processed (W) is always constant. By rotating the rotating shaft (7), the rotation locus of the clamp mechanism (11) is made to approximately pass through each of the stations (S+), (S2), and (S3).

Further, a rail member (17) is fixed to the front surface of the upper horizontal frame (2a) of the frame (2), and this rail member (17) is fixed to the front surface of the upper horizontal frame (2a) of the frame (2).
7) is engaged with the traveling head (1 day). A motor (19) is attached to the travel head (18), and by driving this motor (18), the rack (page 18) is moved laterally along the rail member (17) through a rack and pinion mechanism. do.

The running head (18) has a loading member (20) for transporting unprocessed workpieces to the loading and unloading station (S+), and a loading member (20) for transporting unprocessed workpieces (W) to the loading and unloading station (Sl) for carrying processed workpieces (W) to the loading and unloading station (Sl). ) Dispensing member (21) dispensing from
The input member (20) consists of a cylinder unit (22) fixed to the traveling head (18) and a clamp mechanism (23) provided at the rod end of the cylinder unit (22). (22) causes the clamp mechanism (23) to move up and down the loading and unloading station (Sl) and this station (B) in every forward and upper direction than S. 20), a cylinder unit (24) fixed to the traveling head (1B), and a clamp mechanism (25) provided at the rod tip of this cylinder unit (24).
), and when the cylinder unit (24) is actuated, the clamp mechanism (25) operates as a loading and unloading station (S+).
and a position directly above this station (Sl).

Furthermore, a transfer member (2B) is provided below the input/discharge station (Sl). The bridge member (28) has the middle part of the arm (26a) swingably attached to the flange part (27) protruding forward from the front surface of the support box (3), and the lower end of this arm (28a) The arm (28a) is connected to the loft of the cylinder unit (28) fixed to the support box (3), and when the cylinder unit (28) is operated, the arm (28a) swings backwards j1j (left and right in Fig. 1) about the middle part. That's what I do. And arm (2
At one end of 6a), there is a 5
As shown in the figure, the chuck mechanism (29
) has been established. This chuck mechanism (29) includes a cylinder unit (29a) and a cylinder unit (29a).
), and the left and right centers (29b) hold both ends of the workpiece (W) by making the cylinder unit (29a) move in a protruding manner. When the arm (28a) swings due to the operation of the shilling unit (28), the chuck mechanism (29)
) is a clamp mechanism (1) provided at the tip of the arm (10).
1) and the clamping mechanisms (23) and (2) at the lowering ends of the input member (20) and the dispensing member (21).
5).

Further, in the preheating station (G2), the second
As shown in the figure, a pair of cylinder units (30) on the left and right,
(30), and an electrical heating device (32) as a preheating device is added to the tip of the loft (31) of these cylinder units (30).

Further, the heating station (G3) is provided with a heating device (6I) equipped with the transfer mechanism of the present invention. The heating device (61) is attached to the support box (3) by a column (
B2) is erected, and a pair of support plates (63) and (83) spaced apart laterally are attached to this column (62), and the structure shown in FIG. 4 is attached to the outside of these support plates (63) and (63). The first motor (64) and the motor (G5) of :52 are fixed as shown in FIG.
) is attached to the case (67).

A pair of first movable bases (68) and second movable bases (69) are provided inside the case (67), and these movable bases (H)
, (H) are attached with a plasma torch (70) connected to the +iir plasma power source (6).

In addition, the movable tables (88) and (69) have guide rods (
71), (71) pass through, and the moving table (H) as a moving body, (
69).

In addition, ball screws (7) are attached to the movable tables (88) and (69).
3) and a spline rod (74) pass through in common,
These ball screws (73) and spline rods (74)
) is rotatably supported by the case (67), and one end of the ball screw (73) is connected to the drive shaft (
64a), and one end of the spline rod (74) is connected to the drive shaft (65a) of the second motor (65). A first pole nut (75) and a second pole nut (78) are screwed into the ball screw (73), and the first pole nut (75) is fixed to the first movable base (68). and the second paulnay) (7B
) is fixed to an inner sleeve (77) which is a rotating body. This inner sleeve (77) is connected to the ball screw (
I
] Movement in the axial direction with respect to the outer sleeve (78) is restricted.

Furthermore, one end of the inner sleeve (77) has teeth I (80).
This gear (80) and the spline Ron 1 are fixed to each other.
' (74) and the south ll1 (81) fitted are combined by +11. In addition, in the 4th [N (82)... is a tasto seal, (83) is an i-member.

In the following, when the first motor (64) is driven, the ball screw (73) rotates, and when the ball screw (73) rotates, the first pole nut (75) and the second pole nut (78) are rotated. try to rotate. However, the first pole nara (75) is
8), the second pole nut (78) is fixed to the inner sleeve (77), a gear (80) is fitted into this inner sleeve (77), and this tooth 1tj (8) is fixed to the inner sleeve (77).
0) is meshed with U'I (81) fitted to the spline rod (74) connected to the second motor (85) (not being driven at the moment), so in the end the first pole motor, h (75) and the second pole nut (78) do not rotate, but instead spiral along the ball screw (73). As a result, the first moving table (68) and the second moving table (69) move synchronously.

Furthermore, when the second motor (65) is driven, the spline rod (74) rotates, and the spline rod (74) rotates.
), the gears (81) and (80) rotate, and the gear (8
0) rotates the inner sleeve (77) and the second hole nand (7B). However, the ball screw (
73) does not rotate, so use the second pole nara) (7G)
moves along the ball screw (73) while rotating, and as a result, only the second moving table (69) moves leftward or rightward.

In this way, the first and second moving platforms (ea), (ea)
Since the plasma torches (70) and (70) can be moved synchronously, there is no interference between the plasma torches (70) and (70).
In addition, since only the second moving table (69) can be moved individually, for example, when performing IFG melting treatment on two cam lift parts of a camshaft at the same time, the intervals between the cam lift parts may be different on one camshaft. Even in such cases, the remelting process can be carried out efficiently.

The heating device (61) can be moved up and down by a vertically moving unit lift (84) disposed on the column (82) J-.

Further, a laser position detection device (85) is arranged behind the plasma torch (70), and this position detection device (85) detects the end surface of the cam portion of the camshaft, which is the workpiece (W), and the plasma torch The plasma torch (70) is moved in the axial direction by a signal from the position detection device (85) so that the arc from the plasma torch (70) is accurately positioned on the cam portion.

Furthermore, chuck devices (86) and (8El) are installed on both sides of the heating station (S3) below the plasma torch (70).
, hold both ends of the workpiece (W) by these chunk devices (8B) and (8B), and rotate the chuck device (86) via one motor (87) and speed reduction mechanism. The member to be processed (W) is rotated around the axis.

Next, the operation of the remelting and hardening processing apparatus (1) configured as described above will be described below. In addition, in the explanation, the clamping device (11) at the tip of each arm (10) is attached to the workpiece (
The description will be made starting from a state in which W) is not gripped.

First, by driving the motor (19) of the traveling hand (18), the unprocessed workpiece is moved in the direction perpendicular to the plane of the paper in FIG.
0), the unprocessed workpiece (W
) and drive the motor (19) again to move the traveling head' (+8) to the center of the device (1).

At step 7, insert the cylinder unit 1-(2) of the input member (20).
2) is activated to lower the clamp mechanism (23) diagonally downward, and both ends of the workpiece (W) held by the clamp mechanism (23) are held by the gripping mechanism of the transfer member (26). (29) holds.

Then, the cylinder unit (28) is activated, and the arm (26a) of the transfer member (26) is driven in the direction shown in FIG.
The workpiece (W) held by the arm (10)
This is advantageous for the rotation locus of the clamp mechanism (11) provided at the tip of the clamp mechanism (11). Therefore, the clamp mechanism (11) provided at the tip of the arm (10) grips the workpiece (W), the gripping state by the chunk mechanism (29) is released, and the arm (
10) The workpiece to be processed (powder) is delivered to the clamp mechanism (11).

After this, one rotation axis (7) is rotated 120° in the counterclockwise direction in Fig. 1.
Rotates and preheats the workpiece (W) to the preheating station (S2)
to be located. Specifically, when the rotating shaft (7) rotates 120° and the clamping mechanism (11) reaches the lowest position, the rotating shaft (7) stops rotating, and the holding member of the electrical heating device (32) (35), the member to be processed (
While holding both ends of the energizing heating device (32
), the laminate (5 days), the piston body (34), and the conductive member (38) pass electricity to the member to be processed (W) to preheat the member to be processed (-) to about 200 to 450°C.

When the preheating is completed, the holding state by the electrical heating device (32) is released, and the 1-rotation shaft (7) is rotated to 11
and rotate 120' counterclockwise in FIG. 1 to position the member to be processed (W) at the heating station (S3). Then, the chuck devices ('813) and (8B) placed on both sides of the heating station (S3)
Hold both ends of I). Once both ends are held, the grip by the clamp mechanism is loosened.

Next, the plasma torches (70), (70) move downward and left and right, so that the tips of the torches face the part of the workpiece (W) to be remelted. Specifically, the parts to be processed (oath)
If the camshaft is used as a camshaft, a plasma torch (70
) and (70) so that their tips face one end of the cam lift.

Once the plasma torches (70) and (70) are positioned at predetermined positions, the chuck device (86) is rotated by driving the motor (87), and the workpiece is rotated by the rotation of the chuck device (86). While (W) is rotated around its axis, a predetermined location of the workpiece (W) is j'
F# Melt. Furthermore, the melting depth at this time is shallow;
Since only the surface portion is melted, after melting, heat is rapidly transferred to other parts than the fused part, and the material is rapidly chilled by self-cooling, forming a part with high hardness and excellent wear resistance.

Thereafter, the rotating shaft (7) further rotates 120" counterclockwise to position the processed workpiece (W) at the loading/unloading station (S). Then, the receiver is moved to the transfer member (
26) is driven in the clockwise direction, and the receiver transfers the processed workpiece (
-) and release the gripping state by the clamp mechanism (11), and the workpiece to be processed (W) is transferred to the transfer member (2).
6) Pass the uke. Next, by the operation of the cylinder unit (28), the arm (28a) of the transfer member (26) swings counterclockwise by a predetermined angle, and the workpiece to be processed is taken out of the rotation trajectory of the clamp mechanism (11). .

When the workpiece is taken out of the rotation locus of the clamp mechanism (11), the cylinder unit (24) of the dispensing member (21) is activated and the clamp mechanism (25
) is lowered and the workpiece to be processed is gripped at its lowered end. In addition, the dispensing member (21) and the input member (20)
At the same time, F: is controlled not to fall, and interference is prevented at the lower end of q.

In this way, the clamping mechanism (
After the processed workpiece (W) is gripped by the cylinder unit 7) (25), the cylinder unit 7) (24) is activated to pull the workpiece upward, and then moved to the traveling end (18) by the drive of the motor (19). The whole unit moves, and the processed member (W) is transported to the next stage, etc.

By repeating the above operation 1-, the object to be treated is continuously remelted and hardened at the same location.

(Effects of the Invention) As explained in I- below, the present invention allows a pair of movable bodies to be moved synchronously, so if applied to a moving mechanism for a plasma torch in a remelting and hardening treatment apparatus, for example, a cam When remelting two cam lift parts of a shaft at the same time, even if the spacing between the cam lift parts is different on one camshaft, efficiency is high.
Can be melt processed. Further, since one plasma torch can be moved relative to the other plasma torch, it is possible to easily deal with cases where the intervals between the cam parts are different.

[Brief explanation of the drawing]

Fig. 1 is a side view of the No. 11 melt hardening processing device equipped with a moving mechanism according to the present invention, Fig. 2 is a front view of the same device, Fig. 3 is an enlarged view of the clamp mechanism, and Fig. 4 is a movement of the heating device. A cross-sectional view showing the mechanism, FIG. 5 is a view taken along two directions of arrows in FIG. 1. In the drawing, (1) is the remelting and hardening processing device, (3) is the support poncus, (7) is the rotating shaft, (lO) arm, (+1
), (23), (25) are clamp mechanisms, (20) are loading members, (21) are dispensing members, (2nd) are receiving members, (32) are preheating devices, (61) are heating devices ,
(84) is the first motor, (G5) is the second motor, (
88) is the first moving table, (H) is the second moving table, (70
) is a plasma torch, (73) is a ball screw, (75)
is the first ball nut, (76) is the second ball nut, (77) is the inner sleeve, (86) is the chuck device, (Sl) is the loading and unloading station, (S2) is the preheating station, (S3) is the heating Station, (W)
is the member to be processed. Figure 2 Figure 3 - ``- Itohisashi Neyama 21E (Spontaneous) September 1985
Monthly 30[l]

Claims (1)

[Claims] In the moving mechanism including first and second moving bodies that move along a guide member, a ball screw rotated by a first motor passes through the first and second moving bodies, and a ball screw rotated by a first motor passes through the first and second moving bodies. The first and second ball nuts are screwed together, the first ball nut is fixed to the first moving body, and the second ball nut is fixed to the first moving body.
A moving mechanism characterized in that the ball nut is fixed to a rotating body rotatably attached to the second moving body, and the rotating body is rotated by a second motor.