JPS5858183B2 - Two-way processing device in one-way automatic processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-way processing device in a one-way automatic processing machine.

For example, in a surface grinder that holds a workpiece at a specific location on a rotary table and transports it, and grinds the workpiece from above while it is being transported, it is possible to simultaneously process both the front and back sides of the workpiece. I can't.

Therefore, for a workpiece that requires processing on both the front and back sides, it is necessary to use two grinders or manually turn the workpiece over.

An object of the present invention is to enable such a one-way automatic processing machine to continuously process the front and back sides of one workpiece from two different directions using one processing machine, and in particular, to This enables processing to be carried out automatically and efficiently.

To explain the embodiment, reference numeral 10 denotes a workpiece holding and conveying body, which is a rotary table that holds and conveys and circulates the workpiece. At location S, a first workpiece holding section 11 for first processing and a second workpiece holding section 12 for second processing.
and arranged alternately.

Reference numeral 20 denotes a processing tool such as a grinding wheel, which performs circular movement for each workpiece 13 held on the first and second workpiece holding parts 11.12 of the workpiece holding and conveying body 10 and moved in a circular manner. It is arranged so that processing is carried out from above.

Each time the first workpiece holder 11 faces each other at a suitable position in front of the processing area, a first workpiece supply means 14 supplies the unprocessed workpiece 13, and a second workpiece holder 12 at a suitable position behind the processing area. A second workpiece retrieval means 15 for taking out the processed workpiece 13 each time they face each other is arranged near the periphery of the workpiece holding and conveying body 10, and the first workpiece supply means 14 and the second workpiece retrieval means 15 A direction changing means 16, which is similarly located near the outer peripheral side of the workpiece holding and conveying body 10, is provided at a suitable location intermediate between the workpiece holding and conveying body 10.

Each time the first workpiece holding part 11 of the workpiece holding and conveying body 10 that is rotationally driven faces the direction changing means 16, the workpiece 13 that has been processed for the first time is transferred to the workpiece 13 of the direction changing means 16. Each time the second workpiece holding part 12 faces the first workpiece take-out means 17 which feeds the workpiece into the workpiece holding rotating part 16a configured to rotate while receiving the workpiece, and the direction changing means 16,
A second workpiece supplying means 18 for feeding the workpiece 13 which has been turned upside down and which is held by the workpiece holding rotating part 16a onto the second workpiece holding part 12 is connected to a support body 19 that supports the direction changing means 16. and arranged around the workpiece holding and conveying body 10.

The first workpiece supplying means 14, the second workpiece retrieval means 15, and the support body 19 are arranged on an arcuate guide rail 21 centered on the rotation center of the workpiece holding and conveying body 10, respectively. supports each individual so that they can move back and forth within a certain range.

The support structure includes, for example, as shown in FIG. 2, a ring-shaped slide base 22 is provided on a guide rail 21, and the support body 19 is fixed onto the base 22.

The first workpiece supply means 14 is provided with a guide rail 2 in the same manner as described above.
The center of the workpiece holding and conveying body 10 is provided on a support body 23 supported on the workpiece holding conveyance body 10 by a supply path 24 which is driven by a drive mechanism (not shown) and a cylinder 25. Feed-out claw 2 that can be moved forward and backward in the direction
6, and the supply path 24 receives the unprocessed workpiece 13 at the sending end of a conveyance means 27 such as a chute for feeding the unprocessed workpiece into the means 14, and then rotates 90 degrees counterclockwise. It is rotated in the direction so that it can directly face the first workpiece holder 11 so that the workpiece can be fed thereto.

The second workpiece retrieval means 15 includes a claw that is reciprocated in the radial direction of the workpiece holding and conveying body 10 by a cylinder (not shown) and takes out the workpiece 13 on the second workpiece holding part 12 onto the unloading means 28. It is supported on the slide base 29 on the guide rail 21, as described above, together with the carrying-out means 28.

The second workpiece retrieval means 17 includes a cylinder 3 on a support 19.
Similarly, the second workpiece supply means 18 is moved forward and backward in the radial direction of the workpiece holding and conveying body 10 by the cylinder 31 of the support 19.

The slide base 32 of the first workpiece supply means 14, the slide base 29 of the second workpiece removal means 15, and the support 19
Each of the slide bases 22 is provided with an engager 34 which can be operated independently and is driven by a cylinder 33 as shown in FIG. A synchronized drive means 36 is provided which engages and disengages from engaging portions 35 provided corresponding to each specific location S of the workpiece holding and conveying body 10.

The retainer 34 corresponds to the interval at which each of the first workpiece supply means 14, the second workpiece removal means 15, and the direction change means 16 faces the workpiece holding section 11.12 of the workpiece holding and conveying body 10. and correctly set each of the means 14, 15, 16 at a predetermined position by advancing and engaging the engaging portion 35 just before the facing state is obtained each time,
When the rotation within a certain range is completed, the engagement is released.

To each slide base 32, 29, 22 or a part fixed thereto, a double-acting means 37, 38, 39, which has one end fixed outside the machine or at a stationary position of the machine and has a spring inside it, is connected, respectively. When each slide base 32.29.22 is synchronously driven by the engagement of the interlocker 34, the spring is loaded, and when the engagement is released, each of the bases 32.29, 2
2, each means is moved back toward its original position.

Each workpiece holder 11.12 includes a machining reference surface support member 40 that supports the workpiece 13 with an appropriate machining allowance (grinding allowance), and a position regulating member that regulates the position of the workpiece 13 in the plane direction. 41, and a clamp member 42 which is movable forward and backward relative to the member 41 and which clamps and fixes the workpiece 13 between the member 41 and the workpiece 13 when the workpiece 13 is advanced. In order to slightly lift the workpiece 13 diagonally upward during supply and removal, a lift member 43 is provided whose base end is pivotally connected to the center of the workpiece holding and conveying body 10 in the radial direction. It is meant to be pushed upwards.

Further, the lift member 43 is provided with a regulating member 44 for guiding the supply and removal of the workpiece 13.

The clamp member 42 and the lift member 43 are individually provided for all of the workpiece holding parts 11.12, and each clamping member 42 is provided individually for each of the workpiece holding parts 11.12.
0, the clamp arms 46 are attached to the same number of clamp arms 46, which are pivoted at equal intervals around the circumference by a shaft 45, and a clamp force is applied to each clamp arm 46 individually by the biasing force of a clamp spring 41 acting on each clamp arm 46.

A passive roller 48 is pivotally attached to the lower end of the clamp arm 46 so as to be engaged with and disengaged from a cam 49 provided at an appropriate position on the outer periphery of the non-processing area of the workpiece holding and conveying body 10 and concentrically arranged with the conveying body 10. , the roller 48 is rotated by the cam 4 due to the rotation of the conveyor 10.
9, the clamp arm 46 is rotated clockwise against the bias of the spring 47,
The clamp on the workpiece 13 is released.

A lift member upper mover 50 for operating the lift member 43 is further attached to the clamp arm 46, and the lift member 43 is
The lift member 43 is pushed upward as shown in the imaginary line in FIG. Prior to clamping, the lift member 43 is lowered, and the workpiece 13 supplied to the upper surface of the lift member 43 is set in a predetermined position.

Reference numeral 51 denotes a rotation drive unit that rotates the direction changing unit 16 by 180 degrees each time a workpiece is received in the workpiece holding rotation unit 16a of the unit 16, and the structure of this unit is, for example, a rack that is reciprocated. Any mechanism can be adopted, such as a combination of a screw and a pinion, a combination of screw gears, or a combination of a simple gear device. It is enough if rotation can be obtained.

The present invention has the above configuration, and a series of processing operations are as follows.

Due to the rotation of the workpiece holding and conveying body 10, the clamp member 42
However, the first workpiece supply means 14 is located at a suitable place in the non-processing area
, the second workpiece retrieving means 15, and the direction changing means 16 are disposed in the non-processing area, as shown by the imaginary line in FIG. It is lifted upward in an inclined state where the outward side is higher.

First, the unprocessed workpiece 13 is transported by the transport means 27,
When the supply path 24 of the first workpiece supply means 14 receives the workpiece 13 at the position shown by the imaginary line in FIG. and fixed to the support body 23.

Immediately before the first workpiece holder 11 of the workpiece holding and conveying body 10 from which the workpiece has been taken out faces the supply path 24, a cylinder (not shown) provided on the slide base 32 moves an engager (not shown) When the first workpiece holding part 11 faces the supply path 24, it engages with the engaging part 35 (see FIG. 2) of the workpiece holding and conveying body 10. When the conveyor 10 rotates, the first
The workpiece supply means 14 are synchronously driven.

During the synchronization 1 drive, the cylinder 25 operates and the supply path 24
The upper workpiece 13 is pushed and transferred onto the lift member 43 and supplied to the first workpiece holder 11.

During the range where
5, the first workpiece supply means 14 returns to its original position by the urging of the reciprocating means 37, and then the supply path 24 rotates to the position shown by the imaginary line in FIG. The next raw material is received from route 27.

When the first workpiece holder 11 is supplied with an unworked workpiece and rotates within a certain range, the roller 48 of the clamp arm 46 comes out of the regulated position by the cam 49 and is released from its engagement, and the clamp spring 47 is biased. As a result, it returns to the position shown by the solid line in FIG.

During this return operation, first, the upper mover 50 that pushes the lift member 43 separates from the member 43 to return the member 43 to the horizontal position, and the unprocessed workpiece 13 is transferred to the processing reference surface support member 4.
0, and then the clamping member 42 firmly clamps the workpiece 13 between it and the position regulating member 41.

When the workpiece holding and conveying body 10 further rotates, the clamped workpiece 13 reaches the lower surface of the rotating machining tool 20 (for example, a grinding wheel), and the required first machining is performed.

The workpiece 13 that has been processed for the first time moves in the non-processing area, and the first workpiece holding section 11 that holds the workpiece moves to the cam 49.
When the position is reached, the clamp arm 46 is moved as described above.
The roller 48 contacts the cam 49 and releases the clamp,
Then, lift member 43 is pushed upward.

Immediately before this first workpiece holding part 11 reaches the position of the direction changing means 16, the cylinder 33 of this means 16 is actuated to advance the engager 34, so that the first workpiece holding part 11 and the direction changing means 16 are moved forward. The direction changing means 16, the first workpiece retrieval means 17, and the second workpiece supply means 18 are driven in synchronism.

During this time, the cylinder 30 of the fourth workpiece retrieving means 11 is operated, and the workpiece 13, which has been processed once, is placed on the lift member 43.
is taken out and fed into the workpiece holding rotation part 16a of the direction changing means 16.

As a result, the first workpiece retrieving means 17 returns to its original position, the direction changing means 16 rotates 180 degrees, and the engaging element 34 temporarily releases its engagement with the engaging portion 35, and the direction changing means 16 rotates 180 degrees. The converting means 16 starts to move back, and just before it directly faces the next second workpiece holding part 12, the engaging element 34 is advanced again and engages with the engaging part 35 of the holding part 12.

Thus, the direction changing means 16 is synchronously driven by the workpiece holding and conveying body 10 directly facing the second workpiece holding part 12, and during this time the cylinder 31 of the second workpiece supplying means 18 is operated to hold the workpiece. Workpiece 1 inverted by 180 degrees inside rotating part 16a
3 is extruded and supplied onto the lift member 43.

Due to this supply, the engagement between the engaging element 34 and the engaging portion 35 is released, and the direction changing means 16, the first workpiece retrieving means 17,
Then, the second workpiece supply means 18 is returned to its original position by the return movement means 38.

Note that during this time, the cylinder 31 has also returned to its original state.

Due to the continued rotation of the workpiece holding and conveying body 10, the lift member 43 returns and the clamp member 42 returns as described above.
The workpiece 13 that has been machined once is clamped by
The second machining is performed when the machining area is reached.

After the second processing is completed, the workpiece holding conveyor 10
When rotates, the clamp is released and the lift member 43 is moved upward as described above, and the second workpiece holder 12 that holds the workpiece 13 directly faces the second workpiece retrieval means 15. Immediately before, an engaging member (not shown, similar to that shown in FIG. 2) provided on the slide base 29 engages with the engaging portion 35, and the second workpiece retrieving means 15 is moved to the workpiece holding and conveying body. 10
During this time, the second workpiece take-out means 15 is driven by its cylinder (not shown) to take it out onto the carry-out means 28 and carry it out of the machine.

Then, the cylinder of the second workpiece take-out means 15 returns to its original position, and during this time the engaging element separates from the engaging portion 35, and the second workpiece take-out means is returned to its original position by its return movement means 39.

Thereafter, the operation of supplying the next workpiece onto the first or second workpiece holder from which the workpiece was taken out is repeated, and the workpiece 13 held and conveyed by the workpiece holding and conveying body 10 is
In a processing machine that is designed to process only from one direction, by changing the direction of the workpiece itself and subjecting it to machining twice before and after, it is possible to process a single workpiece from two directions, and each By controlling the operation of the cylinder using a position detection means such as a microsinch or a programmable control circuit, everything from supplying the unprocessed material to changing direction and taking it out after processing is completed can be done automatically. Moreover, it can be carried out with high efficiency under continuous driving of the workpiece holding and conveying body.

In the example, the workpiece is a connecting rod, and the case where both the front and back surfaces of the workpiece are machined is shown, and even when machining the open side of the workpiece, it is possible to hold it under the same conditions. Both the 1st and 2nd workpiece holding parts have the same configuration, and the height of the machining reference surface holding member of the second workpiece holding part is adjusted so that the first workpiece is It is sufficient to set it higher than that of the holding part.

Such a difference in height of the machining reference surface support member does not cause any inconvenience by using it exclusively for the first and second machining.

In addition, further differences are allowed, and the first processing and
It is also possible to have a completely different structure suitable for the second machining, and it is possible to perform automated machining on any two sides or two locations of a workpiece of any shape.

As described above, the present invention is capable of continuously performing automated processing in two directions by changing the direction of the workpiece in one one-way automatic processing machine, and the first workpiece supplying means , a second workpiece retrieval means, further a first workpiece retrieval means, a direction changing means, and a second workpiece supply means,
Since it is driven in synchronization with the workpiece holding and conveying body when required, and the workpiece is fed and taken out with the relative speed set to zero, the transfer is proper and reliable, and high-precision two-way machining is possible. At the same time, highly efficient machining can be realized and the device can be made at low cost.

In addition, by arranging the direction changing means as a simple rotation mechanism near the outer periphery of the workpiece holding and conveying body, there is no need for a complicated device for reversing the workpiece, and the installation space is minimized, resulting in a compact device. can do.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a main part of the embodiment, and FIG. 2 is a longitudinal cross-sectional view of a portion corresponding to the line ■-■ in FIG. 10... Workpiece holding conveyance body, 11...
First workpiece holding section, 12... Second workpiece holding section, 13... Workpiece, 14... First workpiece supply means, 15... ...Second workpiece retrieval means, 1
6... Direction changing means, 17... First workpiece taking out means, 18... Second workpiece supplying means,
19...Support body, 20...Processing tool,
21... Guide rail, 22, 29, 32...
...Slide base, 24... Supply path, 27
...Transporting means, 28... Carrying out means, 3
4... Engagement element, 35... Engagement portion, 36
... Tuning, driving means, 37, 38, 39...
... Reciprocating means, 40 ... Processing reference surface support member, 41 ... Position regulating member, 42 ... Clamp member, 43 ... Lift member ,46...
... Clamp arm, 47 ... Clamp spring, 48 ... Roller, 49 ... Cam, 50 ... Upper mover, 51 ...・Rotation drive unit.

Claims (1)

[Scope of Claims] 1. A workpiece holding/transporting body configured to hold and circulate a workpiece and subject it to processing from one direction includes a first workpiece holding section for first processing and a first workpiece holding section for second processing. The second workpiece holders are arranged alternately at equal intervals, and the first
a first workpiece supply means for supplying a workpiece each time the workpiece holder faces each other; and a second workpiece extractor for taking out the workpiece held by the second workpiece holder at a proper position behind the processing area each time the second workpiece holder faces each other. a direction changing means for receiving and turning over the workpiece held by the first workpiece holding portion each time the first workpiece holding portion faces each other at an intermediate position between the first workpiece supplying means and the second workpiece removal means; A first workpiece retrieving means for taking out the workpiece held by the first workpiece holding part to the direction changing means each time the first workpiece holding part faces the direction changing means, and further a second workpiece holding part to the direction changing means. A second workpiece supplying means for supplying the workpiece held by the direction changing means to the second workpiece holding part each time the direction changing means faces each other is disposed on the side of the circulating movement locus of each workpiece holding part, and the first processing A device comprising: a raw material conveying means for feeding the raw material into the material supplying means; a carrying-out means for transporting the workpiece taken out by the second workpiece taking-out means; and a driving means for driving the direction changing means. Two-way machining device 2 in a directional automatic machining machine A workpiece holding and conveying body configured to hold and convey a workpiece for processing from one direction is provided with a first workpiece holding section for first processing and a second workpiece holding section for first processing. The second workpiece holders for two processes are arranged alternately at equal intervals, and the first
a first workpiece supply means for supplying a workpiece each time the workpiece holder faces each other; and a second workpiece extractor for taking out the workpiece held by the second workpiece holder at a proper position behind the processing area each time the second workpiece holder faces each other. a direction changing means for receiving and turning over the workpiece held by the first workpiece holding portion each time the first workpiece holding portion faces each other at an intermediate position between the first workpiece supplying means and the second workpiece removal means; A first workpiece retrieving means for taking out the workpiece held by the first workpiece holding part to the direction changing means each time the first workpiece holding part faces the direction changing means, and further a second workpiece holding part to the direction changing means. A second workpiece supplying means for supplying the workpiece held by the direction changing means to the second workpiece holding part each time the direction changing means faces each other is disposed on the side of the circulating movement locus of each workpiece holding part, and the first processing A raw material conveying means for feeding the raw material to the material supplying means, a carrying-out means for transporting the workpiece taken out by the second workpiece taking-out means out of the machine, and a driving means for driving the direction changing means. , furthermore, the direction changing means, the first workpiece retrieval means and the second workpiece supply means are provided on one support, the first workpiece supply means, the second workpiece retrieval stage and the support each time the first workpiece holder faces the first workpiece supply means; and Each time the second workpiece holding part faces the second workpiece retrieval means, a synchronized drive means is connected to and disengaged from the conveyance body so as to drive them in synchronism with the conveyance body, and the first workpiece supply means and the second workpiece It is provided in each of the take-out means, and the first workpiece supply means and the second
Provided between each of the first workpiece supply means and the second workpiece retrieval means and the machine body or a stationary part outside the machine, a backward movement means for respectively moving the workpiece takeout means back after the synchronized driving,
Each time the first workpiece holder faces the direction changing means, it engages and disengages from the workpiece holding and conveying body so as to synchronize the direction changing means within a certain range, and when the direction changing means is released from the synchronized drive, the direction changing means is activated. Each time the second workpiece holding section moves backward and faces the direction changing means, the first workpiece supplying means engages and disengages from the workpiece holding and conveying body so as to synchronize the direction changing means with the workpiece holding conveyance body again within a certain range. A tuned driving means separate from the first tuned driving means provided in each of the second workpiece retrieving means is provided on the support supporting the direction changing means, and the direction changing means is connected to the first workpiece holding part and the second processing part. Another reciprocating means for moving the direction changing means backward each time the direction changing means is synchronously driven in opposition to each of the object holding parts is connected to a support that supports the direction changing means and a stationary part outside the machine body or the machine body. Provided between
A two-way processing device in a one-way automatic processing machine, wherein each workpiece supply means and each workpiece take-out means are operated during each synchronous drive.