JPS61146470A - Deburring device - Google Patents

Abstract

PURPOSE:To deburr or chamfer a burr removal surface without receiving any effect of roughness of burrs, by controlling a deburring condition so as to set it in optimum condition all the time during operation according to a variation in burr height. CONSTITUTION:A piston 22 of an air cylinder 23 is pressurized in a 42a direction, while a tool rotating motor 18 is rocked in a 42a direction, and a deburring tool 5 is made contact with a machining start end part 40 of a work 1. A displacement detecting signal SA corresponding to a displacement value of the deburring tool 5 is outputted to an operation control part 36 from a varying transformer 33 via an amplifier 35. Then, from the operation control part 36, control signals SC and SD are outputted so as to cause each rotational frequency of the tool rotating motor 18 and a drive motor 14 to become optimum revolving speeds NX and NY during operation. As a result, height of a burr 6 grows large, while the motor 18 increases its speed and the motor 14 decreases its speed the other way. And, a removal speed per unit time by the tool 5 varies according to the height of the burr, thus a removal surface is uniformly ground for removal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a burr breaking device for automatically removing burrs.

[Technical background of the invention and its problems]

In general, various types of burrs, such as large burrs such as cast burrs, molding burrs on plastic molded products, and cutting mark grinding burrs on machined products, are removed manually using an air grinder or electric grinder equipped with a rotating tool. It's being done well. However, since the deburring process described above is done manually,
Not only does it cause work safety problems, but it also requires a high level of skill to remove burrs uniformly, and has the disadvantage that the quality of the deburring is unstable.

Therefore, attempts have recently been made to automatically remove burrs using robot devices. However, conventional automatic deburring machines usually remove burrs under constant burr failure conditions regardless of their uneven shape, which results in uneven burr removal amount and requires highly accurate deburring. It was difficult.

[Purpose of the invention]

The present invention has been made in consideration of the above circumstances.

An object of the present invention is to provide a deburring device that can automatically perform uniform deburring.

[Summary of the invention]

The influence of the unevenness of the burr and the change in tb height can be determined by controlling the feed rate relative to the actual workpiece during deburring, the rotational speed of the deburring tool, and the pressure force applied to the burr by the deburring tool. The problem is solved by at least one selected one.

[Embodiments of the invention]

An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 3 show the deburring device of this embodiment. This deburring device includes a holding part (2) that holds a workpiece (1), and a left arrow (3a) of this holding part (2).

It has a feed section (4) that feeds in the direction (3b) and a deburring tool (5), and rotates the deburring tool (5) and creates a burr (6) on the workpiece (1). A tool holding part ()) that presses against the side edge of the deburring machine A (5), a displacement detection part (8) that detects the amount of displacement during processing of the deburring machine A (5), and a displacement detection part (B) of the deburring machine A (5). 8), and a processing control section (9) that controls the removal amount of the burr (6) to be constant based on the displacement detection signal 8A output from the section 8).

Therefore, the holding part (2) is a rectangular flat plate-shaped mounting table.

A fixing jig (not shown) for fixing the mounting table (workpiece 0 mounted on the mounting table 111) in a predetermined position, and a plurality of engaging protrusions a1) protruding from the lower surface of the mounting table a1). It's 1 from. The engaging protrusion (11)... is connected to the center of the mounting table (11).

Five protrusions are provided at the four corners. moreover.

The feeding section (4) includes a pair of support plates (121), (12b
), a pair of guide shafts α3. (13), and a support plate (12-8) installed on these support plates (12-8, 12-8) so that the axial directions are in the directions of arrows (3a) and (3b). and a feed drive motor a4 fixed so that the rotation axis I is in the direction of the arrow (3s, (3b)).

A shaft joint 9 coaxially connected to the tip of the rotating shaft a4.

It consists of a feed screw α whose one end is coaxially connected to the shaft joint IS and whose other end is pivotally supported by a support plate (12b). Above guide shaft α3. (1: I and feed screw (Ie
are parallel to each other, the feed screw (le is located at the center of the guide shaft 3.0, and the feed screw αe is located at the center of the mounting table (II). Projection e1m) I
C is screwed on. On the other hand, other engaging protrusions υ...
2 guide shafts 0. Arrow (31) on a3, (
3b) is fitted so as to be slidable in the direction. therefore,
By starting the feed drive motor I and rotating the rotating shaft I forward and backward, the holding part (2) can be moved as indicated by the arrows (3a) and (3b).
It is now possible to feed and drive in the direction. on the other hand.

The tool holder (7) includes a deburring tool (5) and a tool rotation motor (aEL) that coaxially supports the holding shaft αη of the deburring tool (5) and rotates the tool rotation motor (11). The motor support (to) is freely supported and vertically installed on the fixed part 4, and one end is pivotally attached to the fixed part r19&).
It has a piston rod (2) whose shaft end is connected to the upper surface of a flat plate-like protrusion that is suspended and protrudes from the rear end of the tool rotating motor, and carries a deburring tool (5). Burrs at constant pressure (6
) and an air cylinder (2) that presses against the The deburring tool (5) is a so-called shafted grindstone, and the grindstone portion has a cylindrical shape, and its side surface serves as a grinding surface. In addition, the tool rotation motor or one cylindrical holding case (goods) and the rotating shaft (to) to which the holding shaft a'0 is attached are partially protruded from one end of the holding case (goods) and are held inwardly. with the motor body (a).

It consists of a protruding piece Qυ protruding from the other end of the holding case. The motor support (2) also includes a pair of pins (5), (2) coaxially protruding from both sides of the holding case (goods).
7), and a pair of support plates (c), (to) whose lower ends are pivotally supported by these pins (gr), whose upper ends are fixed to the fixing part α scratches, and which sandwich the holding case (gr). It consists of The air cylinder (G) is a double-acting type consisting of a piston rod to which the piston rod (2) is coaxially connected, and a cylinder (to) into which the piston rod is slidably inserted. A pair of air conducting tubes C for reciprocating in the axial direction
31) and 01) are connected to the side wall of the cylinder (to) with the piston (to) sandwiched therebetween. Furthermore, the displacement detection section (8)
is a differential transformer (19JL) whose lower end is pivotally connected to a fixed part (19JL) opposite to this fixed part (19JL) directly below the fixed running part (α Nishiki), and a 9 differential transformer (19JL). The displacement detection rod (
It consists of (goods). Then, from the differential transformer (to), the displacement detection rod (goods) comes in and out, and the deburring tool 5
) A displacement detection signal 8A having a voltage corresponding to the amount of displacement is output. On the other hand, the processing control section (9) is connected to the output side of the differential transformer (to) and receives a displacement detection signal S.
An amplifier (to) that amplifies the signal A, a calculation control section (to) connected to the output side of this amplifier (to), such as a microcomputer table, this calculation control section (to), and a feed drive motor I. a first motor driver (b) that is provided between the feed drive motor a4 and controls the rotation of the feed drive motor a4; and a calculation control section (to).
and a second motor driver (to) that is installed between the tool rotation motor α barrel and controls the rotation of the tool rotation motor I, and a control signal button from the calculation control unit (to) to control the operation of the air cylinder @. It consists of an air pressure control circuit (to). The arithmetic control section (to) stores a computer program which will be described later.

Ru.

The workpiece (1) is a rectangular parallelepiped-shaped cast product.

- There are burrs (6) on the ridge. This burr (6)
teeth.

There are irregularities as shown in the figure. Therefore.

This workpiece (1) is mounted using a fixing jig so that the side edge where the burr (6) is generated is in the direction of the arrows (3a) and (3b) and directly under the deburring tool (5). Stand Q
Fix it to l. Next, the feed drive motor I is started, and the mounting table a is moved to the machining start end C of the workpiece (1).
Position the deburring tool (5) so that it comes into contact with G.

Therefore, from the calculation control section (to) to the air pressure control circuit (to)
By outputting control signal 8B to the air cylinder (
Pressurize the piston (2) in c) in the direction of the arrow (4C1). Then, the tool rotation motor α oscillates in the direction of the arrow (42), and the deburring tool (5) moves toward the machining start end G411.
comes into contact with. Note that before machining, the piston (2) should be aligned with the arrow (
41b) direction to move the tool rotation motor in the direction of arrow (41b).
2b) direction to move the deburring tool (5) to the workpiece (1).
). Next, the arithmetic control unit outputs the control signal SC to the first motor driver (b) and the control signal 8D to the second motor driver @. Then, as a result of the rotation of the feed drive motor I and the tool rotation motor H, the workpiece (1) is integrated with the holding part (2) as shown by the arrow (3a).
) direction, and the deburring tool (5) rotates to remove the burr (6). On the other hand, a displacement detection signal 8 is sent from the differential transformer (to) via an amplifier (to).
The person is output to the arithmetic control section (to). This differential transformer (
(to), the deburring tool (5) is in a fixed position in advance.

For example, it is set so that when it comes into contact with the side edge of the workpiece (1), it shows a reference displacement amount D. Then, the arithmetic control section (to) multiplies and divides the displacement value indicated by the displacement detection signal 8A, respectively, and calculates the proportional coefficient A (= ΔD
X M ), B (= N/ΔD) are calculated. That is, among these proportional coefficients A and B, proportional coefficient A is.

It increases as the height of the burr (6) increases, and vice versa.

The proportionality coefficient B decreases as the height of the burr (6) increases. Next, these proportional coefficients A and B are multiplied by the standard rotational speed Nox of the tool rotation motor α Enoki and the standard rotational speed Noy of the feed drive motor α4, respectively, to obtain the optimum rotational speed Nx.
(=NoxxA) and Ny (=NoyxB) are obtained.

Therefore, from the calculation control S (to), the rotation speed of the tool rotation motor and the feed drive motor I is determined during the machining period.

Control signals SC, SD to achieve the optimum rotation speed NX, NY
is output. As a result, the height of the burr (6) increases, the speed of the tool rotation motor α is increased, and the feed drive motor 14) is decelerated. On the contrary, Bali (6)
As the height of the tool rotation motor decreases, the speed of the feeder drive motor (X4) increases.Thus, the removal speed per unit time by the deburring tool (5) is Despite the unevenness of the burr (6), it changes depending on the height of the burr (6).

It is possible to uniformly polish and remove the removed surface so that it forms a straight line.

In the above embodiment, the feed drive motor α4 of the feed section (2) and the tool rotation motor (2) of the tool holding section (7) are
) are simultaneously controlled to the optimum state according to the height of the burr (6), but only one of them may be used. Further, the feeding section (2) is configured to feed and move the workpiece (1) side, but the workpiece (1) side is fixed.

The tool holder (7) side may be sent toward the workpiece (1)K. Furthermore, the pressing force of the deburring tool (5) by the air cylinder (to) may be changed in accordance with the change in the height of the burr. tb, in proportion to the height of the burr.

The pressing force of the deburring tool (5) may be increased or decreased. Furthermore, other displacement needles such as a potentiometer or a magnetic displacement meter may be used as the displacement detection section (8).

〔Effect of the invention〕

As described above, in this invention, the deburring processing conditions are controlled to be optimal during processing according to changes in the height of the burr, so that the surface from which the burr is removed is not affected by the unevenness of the burr. Instead, it can be deburred, that is, the floor plan can be changed.

As a result, the quality of deburring is improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of a deburring device according to an embodiment of the present invention;
Figure 2 is a cross-sectional view of the line 1-1 in Figure 1, and Figure 3 is a cross-sectional view of Figure 2.
It is a sectional view taken along the line -■. (1): Workpiece, (2): Holding part. (4): Feeding section, (5): Deburring tool. (6): Paris, (7): Tool holding part. (8): Displacement detection section, (9): Processing control section. αI: Tool rotation motor. (2): Air cylinder (tool pressing part). Agent: Patent Attorney Noriyuki Chika (1 person)

Claims (1)

[Scope of Claims] A holding part that holds a workpiece with burrs, a tool holding part that has a deburring tool that removes the burrs, and a tool rotation motor that supports and rotates the deburring tool. , a feeding section that feeds and moves the holding section relative to the deburring tool along the burr generation direction; a tool pressing section that presses the deburring tool against the burr; and a tool pressing section that presses the burr against the burr. a displacement detection section that detects the amount of displacement of the deburring tool in contact with the deburring tool, and a displacement detection signal that is electrically connected to the tool holding section, the feeding section, and the tool holding section and output from the displacement detection section; a processing control unit that outputs a control signal that changes the burr removal efficiency in response to the change in the height of the burr and makes the surface after the burr removal uniform; By at least one selected from the following: controlling the rotational speed of a motor, controlling the relative feeding speed of the holding section by the feeding section, and controlling the pressing force of the deburring tool to the burr by the tool pressing section. A deburring device that is characterized by: