JPH0790419B2 - Deburring device - Google Patents

Description

The present invention relates to a deburring device for casting products, injection molding products, and the like.
More specifically, the present invention relates to a deburring device which is installed in parallel with a die casting machine or the like and automatically removes burrs from a die casting product by using a driving force for displacing the movable mold.

[Prior Art] The die casting method is a method in which a molten metal is injected under pressure into a precision mold to cast the molten metal. The castings made by this method are highly accurate,
Almost no machining required. Therefore, it is the most suitable method for mass production and is widely used for casting aluminum, zinc alloys and the like. However, in this method, since the molten metal is injected into the cavity defined by the movable mold and the fixed mold with a considerably high pressing force, the molten metal flows out of the cavity of the mold to the outside of the cavity, which appears as burrs in the cast product. . Therefore, this burr needs to be removed from the molded product in a separate step, which has been an obstacle to mass production.

Conventionally, when deburring a die cast product, the deburring is removed by a dedicated deburring machine which is arranged at a considerable distance from the mold. That is, the die cast product cast by the die cast machine is taken out by the work take-out machine, and once,
It is transported to the vicinity of the deburring device, which is placed a considerable distance away, and temporarily stocked. The stocked die-cast products are collectively collected and sequentially deburred by a deburring device.

[Problems to be Solved by the Invention] However, this method requires a work stock space near the deburring device. In particular, as the production efficiency of die-casting machines has increased, the stock space has inevitably expanded as the quantity of products has increased, and it has become a dead space that cannot be overlooked in a factory utilizing a small space. Moreover, the personnel who operate the deburring device are indecisable, so labor costs are also required, and because the semi-finished products before deburring are stocked, the manufacturing process is interrupted and complete automation is difficult to achieve. In addition, there was inconvenience such as loss of time.

Therefore, an object of the present invention is to provide a low-cost deburring device with a simple structure capable of continuously and automatically performing deburring, and effectively utilizing a small space which is unnecessary for deburring personnel. It is in.

[Means for Solving the Problems] In order to solve the above problems, the present invention is a deburring device installed in the vicinity of a die casting machine including a fixed mold and a movable mold. The device is connected to an arm extending from a movable platen that holds a movable mold of the die casting machine,
A movable head that is displaced integrally with the movable mold, a fixed head that is arranged so as to face the movable head, and a reciprocating operation between the fixed mold and the movable mold to move the workpiece from the movable mold. And a work take-out machine that conveys a work between the fixed head and the movable head, and at least one of the movable head and the fixed head. The work take-out machine removes the movable head and the fixed head. Deburring means for removing burrs adhering to the work conveyed between the fixed head and the movable head, and the movable head has an annular member defining positioning holes. When the movable head is displaced to the fixed head side, the guide post and the annular member are fitted to each other to position the movable head and the fixed head. And wherein the Ukoto.

[Operation] The work unloader is displaced to remove the work from the movable mold, and the work is conveyed and positioned between the movable head and the fixed head. Next, the movable head is displaced to the fixed head side, and burrs on the work are removed by the deburring means. At this time, the positioning guide post of the fixed head and the annular member of the movable head are fitted to each other, and the positioning of both heads is accurately performed.

[Embodiment] Next, a preferred embodiment of the deburring apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

First, the overall configuration of the apparatus will be described with reference to FIGS. 1 to 3.

A fixed platen 14 is disposed in the vicinity of one end of a base 12 which constitutes a die casting machine 10 shown by a chain double-dashed line in FIG.
A fixed mold 16 and a molten metal press-fitting portion 18 are provided on both surfaces of the platen 14 and communicate with each other through a runner (not shown).

On the other hand, a stand (not shown) is erected on the other end of the base 12, and a guide shaft 20 is installed between the stand and the stationary platen 14. The movable die 22 is fixed to a movable platen 24 which is movably supported on the guide shaft 20 in the directions of arrows A and B. The movable platen 24 is driven by a drive shaft 26 connected to a mold clamping cylinder (not shown).

Therefore, the deburring device 28 is arranged close to the die casting machine 10. Steps 30a and 30b are formed at both ends of a pedestal 30 that constitutes the deburring device 28, and stands 32, 34 and 36 are erected on the steps 30a and 30b (see FIG. 2). At the upper ends of these stands 32, 34, 36 are a pair of guide bars 3
8 and 40 are mounted, and these guide rods 38 and 40 are on the stand 3
It is fixed to 2, 36 by a plurality of nuts 42.

The movable head 44 for deburring is a guide rod through the sliding tube 46.
38 and 40 are slidably suspended in the directions of arrows C and D. The movable head 44 is connected to the movable platen 24 via an arm 48, and the drive shaft 26 of the die casting machine 10 is
Alternatively, by moving in the B direction, it is possible to move in the direction parallel to this moving operation, that is, the C or D direction.
Reference numeral 50 indicates a stopper, reference numeral 52 indicates a deburring pin, and reference numeral 54 indicates a positioning hole. The configurations of the movable head 44 and the floating arm 48 will be described in detail later.

On the other hand, the fixed head 56 includes plate bodies 62 and 64 fixed to the stands 34 and 36 by a nut 60 via a shaft 58, and a deburring plate 66 fixed to the stand 34. In this case, the shaft 58 is fixed to the stands 34, 36 by the nut 68. The work holding cylinder 70 is horizontally oriented and supported by the plates 62 and 64 and the stand 36.
The end portion of is engaged with the guide shaft 72. Work piece 74
Is for supporting a conveyed work, as will be described later, and is provided with a deburring pin 75 around it. Similarly, the deburring plate 66 has deburring pins.
A positioning guide post 80 is disposed below the deburring plate 66. In addition, the guide post 80
Underneath, attach the gate breaking pin 78 to the stand 34.
And a deburring hole 82 is formed in the deburring plate 66 (see FIG. 3).

Next, the work take-out machine 84 is provided with a sliding portion 90 which is slidably supported on a base 86 via guide shafts 88 in the directions of arrows G and H. The cylinder 92 fixed to the base 86 is coupled to the sliding portion 90 via the member 94 (see FIG. 2), and the sliding portion 90 is connected to the arrows E and F.
Move in both directions. An arm 96 is supported on the sliding portion 90 by a sliding member in a direction orthogonal to the arrows E and F. Further, a workpiece 98 (see FIG. 4) is provided at the tip of the arm 96.
A work holder 100 that grips is attached. The arm 96 and the work holder 100 are moved by a cylinder 104 via a shaft 102 (see FIGS. 7 and 8). Therefore, in addition to the position shown by the solid edge in FIG.
Each position shown by a dotted chain line can be taken.

Next, before entering a detailed description of each part of the deburring device 28, a die cast product cast by the die casting machine 10 of FIG. 1, that is, a work 98 will be described with reference to FIGS.
Description will be made with reference to the drawings.

The work 98 has, in addition to the product section 106, an overflow section 108 corresponding to the mold pool and a gate section 110 corresponding to the mold gate. Further, the product section 106 has a plurality of through holes.
On the other hand, the tip of the gate part 110 is provided with a disc-shaped stamp part 112. The stamp portion 112 has a recess 112a.
Is provided and the loader head 1 of the work holder 100, which will be described later.
It is configured to fit with 14 (see FIG. 5). In addition, burrs are formed on the outer edge of the workpiece 98 and the inner surface end of the through hole 106a.
116 is attached. In the case of the through hole 106a, these burrs 116 are concentrated near both ends of the hole and do not occur on the inner surface.

Next, with reference to FIGS. 7 to 9, the work holder 100
The configuration of will be described. FIG. 7 shows a state in which the stamp portion 112 of the work 98 is not gripped, while FIGS. 8 and 9 show a state in which the stamp portion 112 is gripped.

A trapezoidal side plate 120 erected on the side end surface of the base plate 118 is fixed to the tip of a hollow arm 96, and the tip screw portion 102a of the shaft 102 is fixed to the side plate 120 by a nut 122 screwed with this.
Is engaged with. A cylinder 124 is mounted on the base plate 118,
The loader head 114 is driven in both directions of arrows I and J via a shaft. On the other hand, the grip claws 126, 126 are rotatably supported by a claw support 130 via rotary support shafts 128, 128, and the claw support 130 is fixed to a base plate 118 with bolts 132. The nail 1
Pins 134 are inserted into the rear ends of the pins 26, and the upper and lower ends of these pins 134 and 134 are connected by a spring 136. Further, discs 138 and 138 are fitted to these pins 134 and 134. Therefore, when the loader head 114 is driven in the J direction and the small diameter portion 114a is displaced between the disks 138, 138, the claw 126 expands around the support shaft 128 by the contracting force of the spring 136. (See FIG. 7). On the other hand, when the head 114 is driven in the I direction and the large diameter portion 114b thereof is inserted between the disks 138 and 138, these disks 138 are spread out against the contracting force of the spring 136, and the claw 126 is opened. It closes (see Fig. 8 and Fig. 9). At that time, since the loader head 114 fits into the concave portion 112a of the stamp portion 112 of the work 98 and holds the stamp portion 112 between the claw 126, the positional relationship with the work holder 100 is accurately determined. Become.

Next, the floating arm 48 that connects the movable platen 24 and the movable head 44 will be described with reference to FIG.

The floating arm 48 connects the movable-side platen 24 and the rear plate 44a that constitutes the movable head 44 to the movable-side platen 24.
When is moved in the A and B directions by the drive shaft 26, the movable head 33 is interlocked and moved in the directions parallel thereto, that is, the C and D directions, respectively (see FIGS. 1 to 3). Bending member 14
0 is fixed to the movable platen 24 by a plurality of bolts 142. A through hole is provided at the end 140a of the bending member 140,
The screw member 144 penetrating the through hole is fixed to the bending member end portion 140a by a pair of nuts 146 screwed with the screw member 144.

A through hole 1 is formed in the center of the end of the screw member 144 on the movable head 44 side.
A spherical body 148 having 48a is fitted through the through hole 148a and fixed to the screw member 144 by the fixing member 150 and the nut 152. The bearing member 154, which forms a spherical bearing paired with the spherical body 148, forms a substantially cylindrical body having a spherical concave portion 154a corresponding to the outer surface of the spherical body 148 therein, and accommodates the spherical body 148. .

The annular disc 156 is fixed to the end surface of the hollow cylinder 160 having the annular foot 160a by the bolt 158. The annular disc 156 and the hollow cylinder 160 form a floating bearing housing portion and house the bearing member 154. On the other hand, the fixed bearing housing member 162
Is fixed to the rear plate 44a of the movable head via bolts 164, and the annular foot portion of the hollow cylinder 160 is formed between the movable head and the rear plate 44a.
160a is slidably stored.

Since the floating arm 48 is configured as described above, the floating arm 48 absorbs some errors in the positional relationship between the movable platen 24 of the die casting machine 10 and the movable head 44 of the deburring device 28.

Next, the configuration of the movable head 44 will be described in detail with reference to FIGS. 1 to 3 and FIGS. 11a and 11b.

The front plate 44b is provided with an annular member 54 defining a positioning hole corresponding to the positioning guide post 80 provided on the stand 34 of the fixed head 56 (see FIG. 2). When the movable head 44 slides in the C direction and approaches the fixed head 56, the annular member 54 fits with the positioning guide post 80 and both heads.
Accurately regulate the mutual positional relationship between 44 and 56. Further, the stopper 50 is fixed to the counter plate 44c attached to the front plate 44b by the screw portion 50a. On the other hand, the deburring pin 52 is attached to the counter plate 44c at a position corresponding to the through hole 106a (see FIGS. 4 to 6) of the product portion 106 of the work 98. That is, the product portion 106 of the workpiece 98 is the stopper 50.
When pressed by the pins, the pins 52 fit into the corresponding through holes 106a (see FIG. 11a).

11a and 11b show the details of the structure of each deburring pin 52. As shown in FIG. The tip of the pin 52 has a tapered small diameter portion 52a.
To facilitate the fitting of the workpiece 98 with the through hole 106a. A cylindrical body 166 attached to the counter plate 44c houses a spring 168. This spring 168 has a fixed ring 52b fitted to the pin 52.
And the bottom surface 166a of the cylindrical body 166, and by the elastic force between the fixed ring 52b and the bottom edge 166a of the cylindrical body 166,
The elastic force pushes the pin 52 in the direction of arrow K through the fixed ring 52b. Therefore, the pin 52 is held at the position shown in FIG. 11a when no external force is applied. When a force is applied to the pin 52 in the direction of the arrow L, the fixed ring 52b slides in the cylindrical body 166 to compress the spring 168, and the pin 52 moves in the L direction to retreat to the position shown in FIG. 11b. To do.

Next, referring to FIGS. 3 and 12, the fixed head 56
The structure of will be described in detail. Figure 12 shows the deburring device
28 is a partial plan view of the vicinity of the fixed head 56 of 28, showing a state in which the workpiece support piece 74 has moved in the direction of arrow M and has protruded from the deburring hole 82 provided in the deburring plate 66 and the stand 34. FIG.

Deburring plate 66 and stand 34 have workpiece 98
A deburring hole 82 having a shape corresponding to the outer edge of 6 is provided, and the deburring hole 82 has a dimension that exactly corresponds to the product portion 106 at the side end portion 82a facing the movable head 44.
It expands in the direction. The overflow break-off pin 76 and the gate break-off pin 78 are provided at positions corresponding to the overflow break 108 and the gate break 110 of the workpiece 98, respectively.

A plurality of deburring pins 75 are planted on the front surface of the fixed plate body 62 at positions corresponding to the deburring pins 52 on the movable head side. Further, the plate bodies 62 and 64 have through holes 62a, 64a, and 62a.
b and 64b are drilled on the same axis. Further, the cylinder 70 and the support rod guide tube 72a are mounted on the rear surface portion of the plate body 64 corresponding to the through holes 64a and 64b, respectively. This cylinder 70
A cylinder shaft 70a extending from is slidably slidable in the through holes 62a and 64a, and its end is fixed to the work supporting piece 74. Furthermore, M in the guide tube 72a,
The support rod 73 slidably supported in both N directions is the through hole.
It is slidably slidable in 62b and 64b, and its end is fixed to the work support piece 74. Therefore, the workpiece support piece
74 is a deburring hole from the position where it contacts the plate 62 (see FIG. 3)
After passing through 82, the cylinder 70 reciprocates in the M and N directions up to the tip of the stopper 50 of the movable head 44 (see FIG. 12) in the retracted position.

The work support piece 74 includes a pressing portion 74a having a shape corresponding to the product portion 106 of the work 98, a support portion 74b fixed to the cylinder shaft 70a and the support rod 73.

Next, the deburring device 28 and the work removing device 84 described above are used.
The operation will be described mainly with reference to FIGS. 1 and 13 to 17.

When the casting of the workpiece 98 by the die casting machine 10 is completed, the movable platen 24 and the movable die 22 are driven by the drive shaft 26 and retract in the B direction. At that time, the workpiece 98 is the movable mold 22.
Along with the retreat.

Here, the cylinder 104 of the work take-out machine 84 is urged,
The work holder 100 moves together with the arm 96 in the G direction by the shaft 102, and advances between the separated molds 16 and 22. Then, the sliding portion 90 of the work take-out machine 84 is moved in the E direction by the cylinder 92, the holder 100 approaches the retracted movable die 22, and faces the stamp portion 112 of the work 98. At that time, the loader head 114 of the work holder 100 is in the retracted position, and the grip claw 126 is expanded. As shown in FIG. 7, when the holder 100 advances to the position where the stamp portion 112 of the work 98 is sandwiched between the grip claws 126, 126, the cylinder 124 is urged to move the head 114 in the I direction. As a result, the head 114 forms the concave portion 112a of the stamp portion 112 that constitutes the workpiece 98.
The grip claw 126 is closed at the same time when the stamp part 112 is clamped between the head 114 and the head 114 (see FIGS. 8 and 9). Therefore, the work 98 is gripped by the work holder 100 at an accurate position.

Next, the cylinder 92 is biased in the F direction, and the work holder 10
0 retreats to the position indicated by the solid line in FIG. Further cylinder 104
Is driven in the H direction, and the work holder 100 is retracted to the position of the chain line 100a in FIG. Next, the cylinder 92 is urged in the E direction, the work holder 100 advances to the position of the chain line 100b in FIG. 1, and the through holes 106a of the work 98 are fitted to the small diameter tip portions 52a of the corresponding deburring pins 52, respectively. .

At the same time, the work supporting cylinder 70 is urged, and the work supporting piece 74 is driven in the M direction. Therefore, the workpiece support piece
74 presses the product portion 106 of the workpiece 98 against the stopper 50 toward the tip. As a result, the movable head 44 side end of the through hole 106a of the work 98 is fitted to the large diameter portion of the pin 52, whereby the burr 116 on the movable head 44 side of the through hole 106a is removed (Fig. 11a and Fig. 11a). (See Figure 13).

On the other hand, the cylinder 124 of the work holder 100 is biased in the J direction to open the stamp portion 112 (see FIG. 7). Further, the cylinder 92 is urged in the F direction, and the work holder 100 retreats to the position 100a in the chain line in FIG. Thereafter, the cylinder 104 is driven in the H direction, and the work holder 100 returns to the chain line position 100c shown in FIG. Here, the die casting machine 10 enters the next casting operation, the movable platen 24 is driven by the drive shaft 26, and starts moving in the A direction. Therefore, the movable head
The floating arm 48 moves in the C direction by the floating arm 48, and the deburring plate 66 attached to the stand 34 of the fixed head 56.
Approach the neighborhood (see Figure 14). At that time, the movable head 44
The work supporting piece 74 retracts in response to the movement of the work piece, and thus the work piece 98 is held while being sandwiched between the work piece 98 and the stopper 50. For this reason, the stamp portion 112 of the work 98 has the deburring plate 6
The gate part 110 is broken off from the product part 106 by being pressed by the gate part breaking pin 78 implanted in 6. On the other hand, the overflow section 108 has the corresponding overflow breaker pins 7
6 is abutted, and is broken off from the product portion 106 by these.

Furthermore, the movable head 44 moves in the C direction,
When 74 is retracted in the N direction, the annular member 54 engages with the positioning guide post 80 of the fixed head 56, and the positional relationship between both heads 44 and 56 is accurately determined. After that, the product portion 106 sandwiched between the stopper 50 and the work supporting piece 74 is deburred into a deburring hole 82.
When entering the inside and passing through the side end portion 82a, the burr 116 on the peripheral edge of the product portion 106 is removed (see FIG. 15).

When the movable head 44 further advances in the direction C, the tip of the deburring pin 52 on the movable head 44 side comes into contact with the end 75a of the deburring pin 75 on the fixed head 56 side (see FIG. 16). . Therefore, the spring 168 in the cylindrical body 116 is fixed to the fixed ring 52b.
The pin 52 on the movable head 44 side is gradually retracted by being pressed and contracted (see FIG. 11b). As a result, the through-holes 106a of the product section 106 respectively correspond to the deburring pins 75 on the fixed head 56 side.
The fitting with the end portion 75a of the

Furthermore, when the movable head 44 moves in the C direction, the product unit 10
6 is pressed by the stopper 50 and is completely fitted with the deburring pin 75 on the fixed head 56 side (see FIG. 17). At this time, the deburring pin 52 on the movable head 44 side is in the maximum retracted position.
In this way, the burr 116 on the fixed head 56 side in the through hole 106a of the product section 106 is deburred on the fixed head 56 side.
Are removed by.

After that, the next die casting is completed and the movable platen 24
Is driven by the drive shaft 26 to start retreating in the B direction. Therefore, the movable head driven by the floating arm 48
44 recedes in the D direction. Here again the work holding cylinder
70 is urged in the M direction to disengage the product portion 106 from the pin 75. As a result, the product section 106 drops onto a conveyor such as a belt conveyor (not shown) provided below, and is thereby conveyed to another section.

[Effects of the Invention] As described above, the deburring apparatus according to the present invention uses the driving force of the movable mold of the casting machine directly as the driving force for deburring, and thus has a relatively simple structure. There is an advantage that the deburring of the cast product can be efficiently performed without labor. Especially when continuously obtaining products with a die casting machine or the like, it is possible to perform the deburring and casting operation of the cast die casting products continuously in succession, so that the automatic process can be interrupted by manpower. There is a significant effect on the improvement of production efficiency. Moreover, during deburring, the positioning guide post of the fixed head is fitted to the annular member of the movable head to perform accurate positioning, so that deburring failure does not occur.

Although the deburring apparatus according to the present invention has been described above with reference to the preferred embodiment, the present invention is not limited to this embodiment, and unnecessary parts of a product can be provided by juxtaposing the apparatus for reciprocating operation. Needless to say, various improvements and design changes can be made without departing from the scope of the present invention, such as application to any device to be removed.

[Brief description of drawings]

FIG. 1 is a plan view of a deburring apparatus according to the present invention, FIG. 2 is a front view of the apparatus shown in FIG. 1, and FIG. 3 is a view similar to FIG. Fig. 4, Fig. 4 is a plan view of the work, Fig. 5 is a side view of the work, Fig. 6 is a sectional view taken along the line IV-IV in Fig. 4, and Fig. 7 is a plan view of the work holder in the work picking machine. FIG. 8 is a view similar to FIG. 7, but showing a state where the stamp portion of the work is gripped by the grip claws, FIG. 9 is a side view of the work holder in the state shown in FIG. 8, and FIG. Partial cross-sectional plan view of the floating arm, FIGS. 11a and 11b are cross-sectional views of the movable head side deburring pin, FIG. 12 is a plan view near the fixed head of the deburring machine of the apparatus of FIG. 1, and FIG. Description of the vicinity of both movable and fixed heads of the deburring machine shown in FIG. 1 when a work is attached to the movable head. FIG. 14 is a view similar to FIG. 13, but showing a state in which a part other than the product part of the work is being broken, FIG. 15 is a view similar to FIG. 14, but the work is FIG. 16 is a view showing a state of passing through the deburring hole, and FIG. 16 is also a view similar to FIG. 14, but showing a state in which the work is being attached to the fixed head side, and FIG. It is a figure showing the state where wearing was completed. 10 …… Die casting machine, 14 …… Fixed side platen 16 …… Fixed die, 22 …… Movable die 24 …… Movable side platen, 26 …… Drive shaft 28 …… Deburring device, 44 …… Movable head 48 …… Floating arm, 52 …… Deburring pin 54 …… Annular member, 56 …… Fixed head 66 …… Deburring plate, 75 …… Deburring pin 76 …… Overflow breaking pin, 78 …… Gate breaking Pin 82 …… Deburring hole, 84 …… Work take-out machine 98 …… Work, 150 …… Fixing member 154 …… Bearing member, 156 …… Annular disk 162 …… Fixed bearing housing member, 168 …… Spring

Claims (7)

[Claims] 1. A deburring device (28) installed near a die casting machine (10) comprising a fixed mold (16) and a movable mold (22), wherein the deburring device (28) is A movable head that is connected to an arm (48) extending from a movable platen (24) that holds a movable mold (22) of the die casting machine (10) and is displaced integrally with the movable mold (22). (44), a fixed head (56) arranged to face the movable head (44), and an advance / retreat operation between the fixed mold (16) and the movable mold (22) to move the movable mold. A work take-out machine (84) for taking out a work from the mold (22) and then carrying the work between the fixed head (56) and the movable head (44), and at least the movable head (44) and the fixed head (56). ), And between the movable head and the fixed head by the work take-out machine. Deburring means (52, 66, 75, for removing burrs adhering to the work conveyed to
76, 78, 82), and the fixed head (56) is a positioning guide post (80).
On the other hand, the movable head (44) has an annular member (54) defining a positioning hole, and when the movable head (44) is displaced to the fixed head (56) side, the guide is provided. A deburring device characterized in that a post (80) and the annular member (54) are fitted to each other to position the movable head (44) and the fixed head (56). 2. The apparatus according to claim 1, wherein the work take-out machine (84) holds the work between the movable mold (22) and the fixed mold (16).
0) and the cylinder (104), the work holder (10
Deburring device consisting of an arm (96) that moves the (0) back and forth. 3. The device according to claim 1 or 2, wherein deburring means (52, 66, 75, 76, 78, 8) is provided.
The deburring device 2) includes pin members (52, 75, 76, 78) implanted in the movable head (44) and the fixed head (56). 4. The device according to claim 3, wherein the pin members (52, 75, 76, 78) are deburring pins (5).
2, 75), an overflow breaking pin (76) and a gate breaking pin (78). 5. The apparatus according to claim 3 or 4, wherein the fixed head (56) has a cylinder (70) and is held by a pin member (52) of the movable head (44). A deburring device for removing a burr of a work by engaging a pin member (75) implanted in a fixed head (56) with the conveyed work under the action of the cylinder (70). 6. The apparatus according to claim 5, wherein the movable head (44) has a cushioning mechanism (168) for cushioning the pin member (52), and the fixed head (56).
Pin member (52) of movable head (44) to pin member (75) of
Deburring device configured to urge the cushioning mechanism (168) to retract the pin member (52) of the movable head (44) when abutting against each other. 7. A deburring device according to claim 6, wherein the buffer mechanism (168) includes a coil spring.