JPS6234772A - Automatic grindstone exchanger in grinding machine - Google Patents

Abstract

PURPOSE:To make a grindstone changed quickly and easily while aligning its center with a grindstone head spindle by employing a rail cramp device which makes paired teeth of a curvic coupling engage and fixes a grindstone case via a guide rail to the side of a grindstone head. CONSTITUTION:A grindstone case 84 of a grindstone cassette 8 transferred along a guide rail 58 via a transfer guide 87 in front of a grindstone head 43 is fixed by means of rail cramp devices 61 and 63 provided on the grindstone head 43 via a guide rail 58 to the grindstone head 43. At the same time, one tooth 49 of a curvic coupling 47 equipped on a boss 82 of a grindstone 81 engages with the other tooth 48 of the coupling 47 equipped on the spindle, and the grindstone 81 is quickly and easily axially aligned with a spindle of the grindstone head 43 and automatically changed.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an automatic grindstone exchange device for a grinding machine.

(Prior art) When replacing the grinding wheel provided on the spindle of the grinding wheel head in a grinding machine, conventionally, the grinding wheel is lifted from a stocker etc. using a chain block, moved to the front of the 1g stone head, and the grinding wheel is attached to the tip of the spindle. was installed manually.

(The origin IJ1 tries to solve I!1iIIIl!il1
Point) Because the grindstone is replaced mainly by hand, 1.
It is reported that it is time-consuming and requires skill, especially the alignment of the grinding wheel and spindle.

Therefore, attempts are being made to automatically replace the grindstone.

The first object of the present invention is to provide an automatic grinding wheel changing device that can quickly and easily align a cassetted grinding wheel with the spindle of a grinding wheel head and change the wheels in a grinding machine. It is in.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a grinding wheel (81) having one tooth (48) of a carbide, hawk, and pull (47) on the side surface of the boss (82). ) The outer periphery of the boss (82) is rotatably held in the whetstone case (84), and the whetstone case (84)
4) is a grinding machine in which a grinding wheel cassette (8) with feeding guides (11?) and (87) on the side is replaced with respect to a spindle (b) of a grinding wheel head (43), The guide (87) of the whetstone cassette (8), (8)
7) is engaged with a guide rail (58) disposed on the opening force of the grinding wheel head (43), and a +18 carboxylic coupling (4) provided on the tip surface of the spindle (44).
7), a grindstone tightening rod (54) that passes through the center of the spindle (44) and screws into the center of the boss (82) of the grindstone 4 ((81)); A rod rotation device (B6) is provided behind the grindstone head (43) to rotate the tightening rod (54), and when the rod rotation device (68) rotates the grindstone tightening rod (54), the spindle ( To regulate the rotation of the grindstone (43
) installed in the rotation stopper 22 (52)
The curvic coupling (47) is engaged with the grinding wheel head (4) in order to fix the grinding wheel case (8) to the grinding wheel head (43) via the guide rail (58).
3) Rail clamp device 2 installed! i(81),
From (82) and (H), the automatic grindstone exchange device in a grinding machine is 4iIr&.

(Function) A feeding guide (87) along the guide rail (58),
The grindstone cassette (8) conveyed to the front of the grindstone head (43) via the rail clamp device m (6
1L (62), guide rail (58) by (B3)
The grinding wheel case (84) is fixed to the grinding wheel head (43) via f# (49) provided on the boss (82) of the grinding wheel (81) and m (4
8), and automatic centering is performed by the curvic coupling (47).

The rotation of the spindle (44) is regulated by the spindle rotation stopper 21 (52), and the rod rotation device (8)
6), the grinding wheel tightening rod (50) is fastened to the center of the boss (82) of the grinding wheel (81).

(Example) Examples will be described in detail below based on the accompanying drawings.

Figure a'G1 is a plan view of the grinding machine, (1) is the workpiece grinding unit, (2) is the tilt stock unit, (3),
(3) is a work rest unit, (4) and (4) are a pair of left and right grinding wheel heads arranged opposite each other, (7) is a grinding wheel stocker unit, and the crankshaft (w) which is a workpiece is a workpiece. It is chucked between the head (11) and tailstock (21).

The left and right grinding wheel head units (0 are movable forward and backward relative to the crankshaft (W) by a feed 1 servo motor (41), and are driven in the longitudinal direction of the crankshaft (W) by a feed servo motor (42).

That is, the spindle (44), which is movable laterally and is supported on the grinding wheel head (43), is driven by a driving servo motor (44).
5) through a belt pulley mechanism (46).

As shown in FIG. 8, a ring-shaped, for example, Humpex & (48), which forms one side of the curvic coupling (47), is fixed concentrically to the tip surface of the spindle (40).
A seven flange (51) is fixedly installed on the outer periphery of the rear end of the spindle (44), and is engaged with this flange (51) to rotate the spindle (
A cylinder piston device (52) for stopping the rotation of the grinding wheel head (43) is installed. Piston rod (53)
moves forward and engages the flange (51), and the spindle (4
4) is rotated according to rule 1.

Furthermore, inside the spindle (44), it can be rotated freely by the same person.
In addition, a grindstone tightening rod (54) is installed so as to be freely movable in the axial direction, and a male screw (55) is formed at the tip of this tightening rod (54), and a hexagonal part (56) is formed at the rear end.
The tightening rod (54) is urged in the backward direction by the spring (57).

A guide rail (58) with guide surfaces on the top and bottom is provided to support the gravity of each grinding wheel head unit (4).

A rod rotation device (8B) is installed at the rear.

At the tip of the guide rail (58), as shown in FIG. 7, a non-pindle (511) is formed so that the tip of the guide rail (40) is exposed.

This 56! (59) Holding rods (81) are fixedly installed in the 4RIl of the tR area as shown in Fig. 6, and each holding rod (81) is slidable in the axial direction inside the grinding wheel head (43). This retaining rod (81) is assembled into a spring (
82) in the backward direction. This allows the rail (5
8) is clamped to the grindstone head (43). In addition, the guide clamp seat (83) is located above the front surface of the grinding wheel head (43) from which the upper holding rods (61) protrude.
... to be fixed. A positioning pin (63t) is provided at the tip of this clamp seat (63). Furthermore, the holding rod (61
) A cylinder piston device 2i ($4) for rail unclamping is installed behind the rail. Piston rod (65)
As the holding rod (81) moves forward, the holding rod (81) bends and the rail (5
'8) becomes an unglamped state.

Rod rotating equipment! (6B) is a hexagonal wrench (67),
Cylinder piston device 21 (H) that moves this forward and backward
and a runner m ((8)) that rotates the wrench (67).
and is installed above the feed servo motor (42).

A pair of left and right grindstone head units (0° (grindstone stocker units y) (7) are arranged in parallel with 0).

As shown in Figures 1 to 5, the grindstone stocker unit (
A grindstone stocker (75) is installed on the base (71) of 7) so as to be movable laterally, and this stocker 7 (75) is driven by a belt pulley mechanism (73) by a feeding servo motor (72).
) and the feed screw (74).

The stocker (75) has a guide rail (76) provided with a guide surface at the bottom of one of three pairs in a direction perpendicular to the moving direction.
... are installed in parallel and alternately in pairs.

In addition, a gate (77) facing above the stocker (75) is erected on the middle part of the base (71), and this gate (77)
At the top, a cylinder piston mounting (7B) is installed parallel to the guide rail (76), and a piston rod (7!3) is installed.
is arranged so as to curve forward and face between both grinding wheel heads (43), (43). A feed bar (791) is provided at the tip of this piston rod (79).

On the other hand, the grinding wheel cassette (8) is as shown in Fig. rS9 and Fig. 1θ, and consists of a grinding wheel (81) and a grinding wheel case (84).

That is, when the inner periphery of the grinding wheel (81) is sandwiched between the bosses (82) and the acid screws (83) are formed in the center of the bosses (82), the curvic coupling (47) is formed on the side surface. Hun Cape & (49), which forms the other side, is fixed with Dokun.

Such a grinding wheel (81) is stored in a grinding wheel case (80,
The grinding wheel (8) is inserted into the center hole (85) formed in the case (84).
The outer periphery of the boss (82) of I) is rotatably assembled, and a cutout (8B) is formed in a part of this grindstone case (80) to expose the grindstone (81).

and above and below the center hole (85) of the whetstone case (84).

Further, upper and lower feed guides (87) and (87) that engage with the guide rails (58) and (7fi) are fixedly installed on the side facing the fun cape m (49), and the upper guide (87) ) Form a pin hole (871) on the side 1
Both guides (87).

(87) is provided with rollers (88)..., (88).... Note that (89) in Figure 1 is a grindstone fixing pin, and a window (82) from which a dresser (81) consisting of a diamond wheel faces is formed on the side surface of the case (84).

Furthermore, a coolant joint (93) is fixed on the top of the grinding wheel case (80), and the coolant nozzle (84) connected to the tip of the joint (93) is exposed to the notch (8B). ) above the feed bar (79
1) An engaging portion (85) that engages with the end portion is provided.

On the other hand, a coolant joint (97) is installed on the grindstone head (43) via a bracket (96). The hose (97) from the coolant supply source (
88) is connected.

The automatic exchange of grinding wheels will be explained below.

First, when replacing the grinding wheel head units (4), the motors (41) and (42) wait at their original positions, and the pair of left and right guide rails (58) on the side of each grinding wheel head (43). 58) so that its base end faces the grindstone stocker unit (7) side. In this state, tighten the tightening rod (5
4) is located in front of the rod rotating device m (6G).

When removing the grinding wheel cassette (8) from the spindle (44), use the cylinder piston fitting El (118) to set the hexagonal wrench (11?) +1: + de 1 and tighten the tightening port 7 de (54
) engages with the hexagonal part (5G) at the t & end, and engages the piston loft (53) with the flange (51) by the cylinder piston 921 (52) to prevent rotation of the spindle (4°0). , When the wrench (87) is rotated by the launch (88), the wrench (87) is rotated, and the tightening rod (50) is removed from the female screw (83) of the grinding wheel boss (82), and the spring ( 59) to tighten the tightening opening (54).
) is returned to the retracted position.

Then, the piston rod (85) is advanced by the cylinder piston installation rL (64), the holding rod (61) is moved forward, and the engagement between the clamp seat (63) and the guide (87) of the grindstone cassette (8) is released. Then, the guide rail (58) is pushed out by the gravity of the grinding wheel head (43), and as a result, the pair of left and right guide rails (58), (58) is pushed out by the grinding wheel, and the pair of guide rails on the force (75) side are pushed out. Rail (7B), (7
G) 11".

On the other hand, the motor (72) moves the grindstone and the stocker (75) horizontally onto the base (71), and the pair of guide rails (78) and (7B) of the stocker (75) are moved to the guide rail (58).

Connect to (58). After that, the piston rod (7) is installed by the cylinder piston mounting m (78) on
9) I: Move forward and attach both ends of the feed bar (791) at the tip to the engaging portions (95) on the left and right grindstone cassettes (8), (8).
) and (95) respectively.

Next, the piston rod (78) is moved backward, and each grindstone cassette (8) is moved from the guide rail (58) to the guide rule (7G) via the guides (8?) and (87). (75) and engage M (115)
and the feed bar (791).

If you want to continue installing the grinding wheel cassette (8) on the spindle (40), move the stocker (75) sideways again and move the other pair of guide rails (7G) and (7G) to the guide rails.
Connect to (58), (5B) and rail (7G)
, (7B), the grindstone cassette (8), (
8) engaging portion (aS).

(85) is engaged with the feed bar (7!91), the piston rod (79) is advanced, and each grinding wheel head (43) is engaged with the feed bar (7!91).
) Send the grindstone cassette (8) forward.

When the piston rod (85) is moved back when the center of the grinding wheel (81) and the center of the spindle (40) are aligned, the spring (62) causes the holding port
is 4G! IL, rail (58) and grindstone cassette (
8) is pulled into the front side of the grinding wheel head (43), and the guide (
The positioning pin (831) of the clamp seat (83) is engaged with the pin hole (871) of the grinding wheel head (43), and the grinding wheel case (80) is positioned with respect to the grinding wheel head (43).
8).

The grindstone case (80) is fixed to the helad (43) via the guides (87), (87).

Simultaneously with the fixing of the case (84), the curvic coupling (47) engages, and its characteristics automatically align the grinding wheel (81) with respect to the spindle (44).

Next, rotate the wrench (67) and move it forward to fasten the male thread (55) of the tightening rod (54) to the female thread (83) of the grinding wheel boss (82).
K) is fixed.

After replacing the grindstone in this way, move the wrench (87) backward to remove it from the tightening rod (54), move the piston rod (53) backward to release the rotation of the spindle (40), and remove the piston The rod (73) is moved back to its original position.

Thereafter, desired grinding is performed.

With the above, when replacing the whetstone so that the IJ is smooth.

A pair of grindstone cassettes (8) can be automatically carried in and out from the grindstone stocker unit (7) to the position corresponding to the spindle (44) of the grindstone head (4), increasing the efficiency of one operation. It can be achieved.

Replacement can also be done fully automatically with quick alignment.

(Effects of the Invention) As described above, according to the present invention, the grindstone 41 having one tooth of a curvic coupling on the side surface of the boss is rotatably held in the grindstone case around the outer periphery of the boss, and In a grinding machine in which a grinding wheel cassette with a feed guide is exchanged with the spindle of the grinding wheel head, a guide rail is placed 7 degrees toward the grinding wheel so that the guide of the grinding wheel cassette being conveyed engages with the grinding machine. , the external force tooth of the curvic coupling provided on the tip surface of the 1 mm spindle, the grinding wheel tightening rod provided passing through the center of the spindle and screwed into the center of the boss of the grinding wheel, and the grinding wheel tightening rod A rod rotation device placed behind the grindstone head to rotate the attached rod, and a spindle rotation stop device provided on the grindstone head to restrict rotation of the spindle when the grindstone tightening rod is rotated by the first rod rotation device. Since the grindstone automatic exchange device was constructed from the above-mentioned curvic coupling and a rail clamp device provided on the grindstone head to fix the grindstone case to the grindstone head side via the guide rail, it was made into a cassette. The grinding wheel can be quickly and easily aligned with the spindle of the grinding wheel head while being automatically replaced, and high efficiency of replacement work can be achieved.

[Brief explanation of drawings]

Fig. 1 is a plan view of the grinding machine, Fig. 2 is a side view showing the grinding condition, Fig. 3 is a front view of the grindstone stocker unit, Fig. 4 is a side view of the same, and Fig. 5 is the grindstone set state. An open plan view showing,
Figure 6 is a sectional view of the rail clamp device, Figure 7 is a side view of the tip of the guide rail showing the guide in cross section, and Figure 8 is a grindstone set! Longitudinal cross-sectional view of the grinding wheel rad part, No. 9r
I4 is a side view of the grindstone cassette showing the case in cross section, and Figure 1θ is a longitudinal sectional view of the grindstone cassette also showing the front part of the grindstone. In addition, (4) in the drawing is the grinding wheel head unit ( ), (43)
is the grinding wheel head, (40 is the spindle, (47) is the curvic coupling, (52) is the spindle rotation stopper, (54) is the grinding wheel tightening rod, (57) is the spring, (58) is the grinding wheel head side guide Rail, (81), (8
2), (+1:l) is the rail clamp device, (aS)
is a rod rotating device. (7) is a grindstone stocker unit, (72), (73)
, (74) is a grindstone stocker feeding device, and (75) is a grindstone stocker. (7B) is a grindstone stocker side guide rail, (78) is a grindstone cassette feeder, (8) is a grindstone cassette, (81)
is the grinding wheel, (82) is the boss, (80 is the grinding wheel case, (8
5) is a center hole, and (87) is a feeding guide.

Claims (1)

[Scope of Claims] A grinding wheel cassette in which a grinding wheel having one tooth of a curvic coupling on the side surface of the boss is rotatably held in a grinding wheel case around the outer periphery of the boss, and a feeding guide is provided on the side surface of the grinding wheel case. A grinding machine in which a guide rail is arranged in front of the grinding wheel head to be engaged with a guide of a grinding wheel cassette to be conveyed, and a guide rail is provided on the tip end surface of the spindle. the other tooth of the curvic coupling, a grinding wheel tightening rod that is provided through the center of the spindle and screwed into the center of the boss of the grinding wheel, and a wheel that is arranged behind the grinding wheel head to rotate the grinding wheel tightening rod. meshing the curvic coupling with a rod rotation device provided thereon, and a spindle rotation stop device installed on the grindstone head to restrict rotation of the spindle when the rod rotation device rotates the grindstone tightening rod; An automatic grindstone exchange device for a grinding machine comprising a rail clamp device provided on the grindstone head to fix the grindstone case to the grindstone head side via a guide rail.