JP2004160563A - Oscillating deburring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oscillating deburring device which is used to deburr and to face-finish the depth and the crossing bore or the like of a part having many long complicated flow passages, and which is provided with a low noise and a low oscillation. <P>SOLUTION: A strong oscillation is applied to a workpiece with abundantly supplying media and a washing liquid dropped continuously like a waterfall to the workpiece. That is, the deburring device applied to a workpiece to be machined in which a passage or a groove opened outside is formed, is provided with: a vibrator 2 retained on a frame via an oscillation proofing material 24; an oscillated body vibrated by the vibrator 2; a jig box 28 fixed on this oscillated body and retaining the above workpiece to be machined; and a circulation connecting passage which leads a polishing grain and the washing liquid toward the passage or the groove of the workpiece to be machined 29 within this jig box 28; deburrs the workpiece to be machined by slurry containing these polishing grain and washing liquid, and also, circulates these polishing grain and washing liquid. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for removing burrs generated after machining or in a casting, and more particularly to a deburring device for supplying a slurry in which an abrasive and a cleaning liquid are mixed to a work to be processed and removing the burrs by vibrating them. It is about.
[0002]
[Prior art]
The mainstream of the conventional vibratory deburring apparatus is a system usually called tumbling. In this method, abrasive grains (also referred to as media) such as balls (bearing balls) used for a ball bearing and a work (also referred to as a workpiece or a work to be processed) are placed in the same container, and vibration is applied to the container. The work was deburred by the mutual impact between the media and the work. However, in this method, the fluidity of the medium is insufficient, and even if the cleaning liquid is added during the vibration, it is difficult to remove burrs over the entire passage portion of a work having a long flow path such as used in a hydraulic system. Therefore, it has been proved that deburring is insufficient even if a long-time vibration is applied.
[0003]
In addition, for vibration transmission parts such as automotive torsion parts, which need to be processed in large quantities and need to be deburred in a short time, increase the vibration acceleration. Is required. However, in this case, the machine becomes large and its own vibration also becomes large, so that it may cause excessive vibration to other precision machine tools on the production line to cause troubles. For this reason, a quiet deburring apparatus with little vibration and capable of processing in a short time has been required.
[0004]
The present invention has been made in view of such circumstances, and has three main objects to be solved. That is, (1) deburring can be performed over the entire length and the entire surface of a complicated work having many long flow paths and grooves, and (2) vibration and noise propagation to the surroundings can be reduced as much as possible. 3) It is an object of the present invention to provide a deburring apparatus capable of performing deburring and surface finishing at the same time so that the deburring time is adjusted to the tact time of the line and enabling the deburring to be performed on a precision equipment manufacturing line.
[0005]
Configuration of the Invention
According to the present invention, it is an object of the present invention to provide a deburring apparatus applied to a work to be processed in which a passage or a groove that opens outward is provided, the vibrator being held on a frame via a vibration isolator, A vibrating body vibrated by the vibrator, a jig box fixed to the vibrating body and holding the work to be processed, and abrasive grains and a cleaning liquid passing through the passage or groove of the work to be processed in the jig box And a circulating system for circulating the polishing particles and the cleaning liquid while deburring the work to be processed with a slurry containing the polishing particles and the cleaning liquid.
[0006]
The work to be processed is held in the jig box with its passage or groove directed upward, and the abrasive particles and the cleaning liquid flow down from above into the jig box in a waterfall manner, so that the slurry is formed in the passage or groove of the work to be processed. It is preferable that the fluid flows sufficiently into the inside so that deburring in the passage and the groove can be reliably performed.
[0007]
The vibrator used here includes a vibrator held on a frame via a second vibration isolator, a vibration motor fixed to the vibrator, and an appropriate vibrator for transmitting vibration of the vibrator to the vibrated body. An elastic member having a high strength can be used. A coil spring is suitable for this elastic material, and the spring constant is set so that the vibrating body, the jig box fixed thereto, and the work to be processed vibrate close to resonance to increase vibration acceleration and amplitude. Is done.
[0008]
The circulation path can be configured so that the slurry flowing down from the jig box is divided into abrasive grains and a cleaning liquid and these are separately supplied to the jig box. In this case, the abrasive particles are allowed to flow down from the hopper into the jig box, and the slurry is separated into abrasive particles and a cleaning liquid by a sieve under the jig box. It may be configured to send to
[0009]
The cleaning liquid separated from the slurry is stored in the cleaning liquid tank divided into two tanks, and the cleaning liquid is sent from one of the clean side tanks to the jig box by the main pump, while the cleaning liquid refluxed from the jig box is guided to the dirty side tank. . It is preferable that a sub-pump is provided in the dirty side tank so that the cleaning liquid containing powdered burrs removed from the work is removed through a filter and then sent to the clean side tank.
[0010]
The vibration isolator can be formed of a steel wire made of a braided body. In particular, it is suitable to wind the steel wire in a tubular or spiral shape and fix one side to the frame and the other side to the vibrator with respect to the center axis. This steel wire has the elasticity of the wires themselves and the damping force due to the friction between the wires, and is optimal as a vibration-proof material.
[0011]
[Action]
According to the present invention, when the medium is passed along the narrow and long passages and grooves of the work, the medium and the cleaning liquid are simultaneously supplied toward the passages and the grooves. It can flow efficiently into the groove. Therefore, burrs on the work can be efficiently removed. In addition, by supplying a sufficient washing liquid and performing necessary filtration, surface finishing is performed simultaneously with deburring. Further, since the vibrating object and the vibrating body are held on the frame via the vibration isolator (isolator), vibration and noise can be sufficiently attenuated. Therefore, there is little possibility that the surrounding environment is adversely affected.
[0012]
Embodiment
FIG. 1 is a front view of a deburring machine according to the present invention. FIG. 2 is a left side view of the same. FIG. 3 is a conceptual diagram of the jig box. In FIGS. 1 and 2, reference numeral (1) denotes a main body frame of a deburring machine, which is usually an iron welding structure. An operation panel (40) is mounted on the right side of the frame (1). The operation panel (40) is used to operate devices and set numerical values. In addition, an opening (11) is provided in the front of the frame (1), from which the work (29) to be described later is exchanged and the discharge position of the cleaning liquid is adjusted. The opening (11) can be opened and closed by a transparent plate (13) which moves up and down by a hydraulic cylinder (12).
[0013]
(2) is a vibrating device, which has a vibrator (20) and a vibrated body (23), as shown in detail in the side section of FIG. The vibrator (20) includes a plate-shaped vibrator (20a) held substantially perpendicular to the frame (1) via a plurality of vibration-proof materials (24), and a vibrator (20a). It has a plurality of fixed vibration motors (21) and a spring (22) for elastically holding the vibrated body (23) on the vibrating body (20a). This spring (22) becomes the elastic material of the present invention.
[0014]
Therefore, when the vibrating body (20a) is vibrated by the vibration motor (21), the vibrated body (23) vibrates via the spring (22). Since a jig box (28) described later is fixed to the vibrated body (23), the vibrated body (23) is hereinafter also referred to as a jig mounting plate (23). The spring constant of the spring (22) used here is set so that the vibrated body (23), the jig box (28), the work (29), etc., vibrate close to resonance, and the vibration acceleration and amplitude increase. I do.
[0015]
The jig box (28) is a box for accommodating the work (29), and as shown in FIG. 3, its upper surface is largely open upward, and an appropriate number of holes (28a) are formed on its bottom surface and side surfaces. ) Is provided. The work (29) is, for example, a valve body used in a hydraulic automatic transmission for an automobile, has burrs at the time of casting or machining, and has passages and grooves serving as flow paths. The jig box (28) is fixed to the vibrated body (23), while the work (29) is oriented in a direction in which the slurry efficiently enters the openings of the passages and grooves, for example, in a state where the jig box (28) faces upward. 28) is fixed inside.
[0016]
Next, the circulation path will be described. The circulation path continuously and circulates abrasive particles (hereinafter also referred to as a medium) and a cleaning liquid from above into a jig box (28). In this circulation system, the media and the cleaning liquid are separately supplied to the jig box (28), where they are merged, passed through the jig box (28) as slurry, and then separated.
[0017]
The media is supplied to a jig box (28) from a hopper (25) provided above the jig mounting plate (23), and the cleaning liquid is supplied from a cleaning liquid tank (35) to be described later by a pump (37a). It is sent to (28). The medium used here is, for example, a ball for a ball bearing (a bearing ball made of steel), a granular grindstone, or the like. The particle size and material of this medium should be appropriately determined according to the work (29). When the work (29) has a passage having a diameter of about 3 mm, the medium is preferably a bearing ball having a diameter of about 1.5 to 2.0 mm.
[0018]
The outlet at the bottom of the hopper (25) faces above the jig box (28), and a stop plate (33) for controlling the media from flowing down is mounted on the outlet so as to be openable and closable. That is, the stop plate (33) is swingably attached to a spindle crossing the outlet of the hopper (25), and is driven to be opened and closed by the hydraulic cylinder (33a). 1 and 2 show the closed state of the stop plate (33).
[0019]
The medium and the cleaning liquid that have entered the jig box (28) fall onto the work 29 in the jig box 28, and the work (29) is vibrated by the vibration motor 21 at that time. Violently collides with. As a result of this collision, burrs of the work (29) are removed as described later, and finishing of the inner surface of the passage or the inner surface of the groove of the work (29) is performed.
[0020]
The slurry flowing down from the hole (28a) of the jig box (28) or overflowing from the upper surface of the jig box (28) falls to a sieve (30) provided below the vibrating device (2). I do. The sieve (30) is slightly inclined and acts as a vibration conveyor by a small vibration motor (31) to separate the medium and the cleaning liquid.
[0021]
Behind the frame (1), a vertically arranged bucket conveyor (26) is arranged as shown in FIG. The media separated by the sieve (30) is transported upward by the bucket conveyor (26), and sent to the hopper 25 from above the bucket conveyor (26) by the injection trough (27). The cleaning liquid separated and dropped by the sieve (30) enters the lower receiving tank (34), is further guided by the gutter (34a), and accumulates in the cleaning liquid tank (35) by free fall.
[0022]
The cleaning liquid tank (35) is divided by a partition into two rooms (35a, 35b), and each room (35a, 35b) is provided with a pump (37a, 37b). One of the chambers (35a) is a clean side tank for storing a cleaning liquid from which powder burrs are removed, and the other chamber (35b) is a dirty side for storing a cleaning liquid containing powder burrs that has been separated by a sieve (30). It is a tank. The main pump (37a) conveys the cleaning liquid to the jig box (28).
[0023]
The sub-pump (37b) sends the cleaning liquid guided from the lower receiving tank (34) to the gutter (34a) and flowing down through the filter device (36) to the room provided with the main pump (37b). The capacity of the main pump (37a) is larger than that of the sub pump. The cleaning liquid is supplied to the jig mounting plate (23) by the main pump (37a) as the medium drops, in conjunction with the opening and closing of the stop plate (33). Mix down. Thus, the cleaning liquid returns to the cleaning liquid tank (35) via the sieve (30) and the lower receiving tank (34).
[0024]
A plurality of small isolators (vibration insulators) (38) are inserted between the main frame (1) and the sieve (30) in order to eliminate vibration and noise of the sieve (30). In this case, as shown, an isolator (38) is attached so as to suspend the receiving tank (34). Although the piping for the cleaning liquid is not shown, the flow direction thereof is indicated by an arrow in FIG.
[0025]
A jig box (28) indicated by a dotted line is attached to the jig mounting plate (23), and a work (29) is fixed. The work (29) is subjected to the action of the medium and the cleaning liquid, and is deburred and finished. The bottom of the jig box (28) is provided with a hole (28a) through which the medium can pass so that a part of the medium can pass through the inside of the box and go down as described above. Usually, since the supply amount of the medium is large, the medium overflows from the jig box (28). If a slightly excessive washing liquid is supplied, the fluidity of the medium can be increased and the work (29) can be sufficiently washed. Therefore, it is possible to make the cleaning step after deburring unnecessary.
[0026]
Since the cleaning liquid contains fine particles (pulverized burrs) in the form of burrs as the burrs are removed, a filter device (36) is provided to separate the burrs. The cleaning liquid is guided from the receiving tank (34) to the gutter (34a) and enters the dirty side room (35b) of the cleaning liquid tank (35). From here, the cleaning liquid is sent to the filter device (36) by the sub-pump (37b), and the cleaning liquid cleaned here is sent to the clean side room (35a) to be circulated. The filter element is usually of a paper throw-away type. Piping is not shown. The above operation is automatically performed by the sequencer set in the operation panel (40), and the operator normally presses the start button to complete one operation.
[0027]
FIG. 4 is a front view of the vibration isolators (isolators) (24) and (38), FIG. 5 is a plan view of the vibration isolators (isolators) (24) and (38), and FIG. The vibration insulators (24) and (38) are formed by spirally winding a wire (50) made of a braided body formed by knitting a thin stainless steel wire. The wire (50) is sandwiched between the upper and lower retainer bars (51) with screws (52) and tightened to fix the position in a spiral (or cylindrical) shape. The winding directions are changed on the way so that the wires (50) of the isolators (24) and (38) are symmetrical with respect to a plane passing through the center on the central axis in FIGS.
[0028]
The retainer bar (51) for fixing the wire (50) is provided with several mounting holes (53), through which holes are mounted between required parts by bolts (not shown). The strengths and spring constants of the eye sorters (24) and (38) are determined by the thickness, number of turns, and diameter of the wire, and by selecting an appropriate value, a large amplitude can be obtained and good attenuation can be obtained. Can be The resonance points of the isolators (24) and (38) are made slightly lower than the vibration frequencies of the vibration motors (21) and (31). In this state, the vibration is moderately attenuated and transmitted to the machine body.
[0029]
Originally, this part is used for the purpose of, for example, silencing the sound of a submarine and preventing the user from taking any action. Compared to rubber, the range of choice of energy consumption is wider, and therefore it is possible to increase the damping rate. In addition, it does not have heat like rubber and has the advantage that it does not break suddenly like rubber, and has high reliability and withstands severe use.
[0030]
In this type of vibration deburring apparatus, the mass of the entire vibration device (2), the jig box (28), the work (29), the vibrating portion including the medium and the cleaning liquid reaches several hundred kilograms, and the vibration acceleration is usually 20 G. Exceeds. In addition, since there is also noise from the sieve (30), the noise and vibration are too high for use in a normal production line. However, by using appropriate isolators (24) and (38) as in this embodiment, the volume around the worker can be suppressed to 80 horn or less, and the vibration of the floor does not affect the peripheral devices. You can do so. For this reason, it is possible to use it incorporated in a production line.
[0031]
Particularly in this embodiment, a separating means for separating the cleaning liquid from the medium such as a sieve (30) is provided below the vibrating device (2), and the separated media is arranged vertically by a bucket conveyor (26) at the rear to separate the separated media from the vibrating device (2). ) Is returned to the hopper (25) arranged above, so that the entire apparatus becomes compact. Further, since a cleaning liquid filter device and the like are also integrated, there is no need to provide a separate cleaning device, so that the installation place can be reduced and total cost can be reduced.
[0032]
【The invention's effect】
The device according to the invention makes it possible to deburr components with many long and complex channels, for example components such as valve bodies used in automatic transmissions of motor vehicles. In addition, since the propagation of vibration and noise to the surroundings can be extremely reduced, continuous operation such as 24 hours a day, 6 days a week can be performed. It is now possible to place it on the production line on the second floor.
[0033]
In addition, since surface finishing can be performed simultaneously with deburring, it is convenient to match the deburring time with the tact time of the assembly line, and it is possible to use the device in a precision equipment manufacturing line.
[Brief description of the drawings]
FIG. 1 is a front view of the apparatus. FIG. 2 is a left sectional view of the same. FIG. 3 is a conceptual view of a jig box. FIG. 4 is a front view of an isolator. FIG. 5 is a plan view thereof. FIG. Side view [Explanation of reference numerals]
DESCRIPTION OF SYMBOLS 1 Main body frame 2 Vibration device 21 Vibration motor 22 Elastic material (spring)
23 Jig mounting plate 24 Anti-vibration material (isolator)
24a Anti-vibration material (isolator)
25 Hopper 26 Bucket conveyor 27 Injection gutter 28 Jig box 29 Workpiece to be processed 30 Sieve 31 Small vibration motor 33 Stopper plate 33a Hydraulic cylinder 34 Receiving tank 35 Cleaning liquid tank 36 Filter device 37a Main pump 37b Sub pump 40 Operation panel 50 Wire 51 Retainer bar 52 Screw 53 Mounting hole

Claims (8)

A deburring apparatus applied to a workpiece to be processed in which a passage or a groove that opens to the outside is formed,
A vibrator held on the frame via a vibration isolator, a vibrator to be vibrated by the vibrator, a jig box fixed to the vibrator and holding the work to be processed, and polishing The particles and the cleaning liquid are guided toward the passage or groove of the workpiece in the jig box, and the workpiece is deburred with a slurry containing the abrasive particles and the cleaning liquid, and the abrasive particles and the cleaning liquid are circulated. Routes and
A vibration type deburring device comprising: The work to be processed is held in the jig box with its passage or groove directed upward, and the circulating system passage is formed by causing the abrasive grains and the cleaning liquid to flow down from above into the jig box in a waterfall manner. 2. The vibratory deburring apparatus according to claim 1, wherein the slurry flows through the groove. The vibrator includes a vibrating body held on a frame via a vibration isolator, a vibration motor fixed to the vibrating body, and an elastically connected vibrating body and the vibrating body. The vibration type deburring apparatus according to claim 1 or 2, further comprising: an elastic material that vibrates the vibration. 4. The vibratory deburring apparatus according to claim 1, wherein the circulation system divides the slurry flowing down from the jig box into abrasive grains and a cleaning liquid, and separately supplies these to the jig box and joins them in the jig box. . The circulation path includes a hopper that supplies abrasive particles to the jig box from above, a sieve that separates the slurry flowing down from the jig box into abrasive particles and a cleaning liquid, and sends the abrasive particles separated by the sieve to the hopper. The vibration type deburring apparatus according to claim 4, further comprising a bucket conveyor and a pump for sending the cleaning liquid separated by the sieve to the jig box. The cleaning liquid separated from the slurry is stored in a cleaning liquid tank, and the cleaning liquid is sent from the cleaning liquid tank to a jig box by a main pump, and the cleaning liquid tank is provided with a sub-pump for circulating the cleaning liquid through a filter device. Vibrating deburring device. The vibration-type deburring apparatus according to any one of claims 1 to 6, wherein the vibration-proof material is formed of a steel wire made of a braided body formed by knitting a thin element wire. The vibration type deburring apparatus according to claim 7, wherein the vibration isolator is formed of a steel wire wound in a cylindrical shape, and one side of the center line is fixed to the frame side and the other side is fixed to the vibrator.

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