CN112388435A

CN112388435A - Burr removing equipment for wooden furniture processing

Info

Publication number: CN112388435A
Application number: CN202011067213.8A
Authority: CN
Inventors: 李阳
Original assignee: Individual
Current assignee: Fujian Guantanxuan Classical Art Furniture Co.,Ltd.
Priority date: 2020-10-05
Filing date: 2020-10-05
Publication date: 2021-02-23
Anticipated expiration: 2040-10-05
Also published as: CN112388435B

Abstract

The invention discloses deburring equipment for processing wooden furniture, which comprises a base, wherein two supporting plates are fixedly connected to the base, a top plate is fixedly connected to the upper ends of the two supporting plates together, a servo motor is installed at the bottom of the top plate, the output end of the servo motor is fixedly connected with a reciprocating lead screw, the reciprocating lead screw penetrates through the supporting plates and is rotatably connected with the supporting plates, the other end of the reciprocating lead screw is rotatably connected with the other supporting plate, a sliding block matched with the reciprocating lead screw is sleeved on the reciprocating lead screw, the upper end of the sliding block abuts against the bottom of the top plate, and the bottom of the sliding block is fixedly connected with an electric telescopic rod. The wood board deburring machine is reasonable in structure, can polish wood boards with different sizes, is wide in application range, can carry out comprehensive deburring treatment on the surfaces of the wood boards without moving the wood boards, improves the working efficiency, reduces the labor capacity of workers and improves the wood board deburring quality.

Description

Burr removing equipment for wooden furniture processing

Technical Field

The invention relates to the technical field of wooden furniture processing equipment, in particular to deburring equipment for processing wooden furniture.

Background

Furniture, namely household appliances, are increasingly diversified along with the development of times, the furniture is different in types, materials and purposes, is complete in variety, is an important basis for establishing working and living spaces, and mainly comprises wooden furniture.

The wood board is an important component of the wood furniture, a large amount of burrs are generated on the surface of the wood board in the processing process of the wood board, the wood board is usually polished by a polishing wheel, a large amount of flying chips are generated due to continuous friction between the polishing wheel and the wood board when the existing deburring equipment is used for processing, the flying chips are easy to float into the air, and the flying dust can be removed through the cooperation of a dust cover and a fan, so that the air pollution is reduced, and the influence on the body of a worker is reduced; but to the plank of broad, it can only partially polish, polishes and accomplishes the back, needs the staff to remove the plank, then polishes once more, so not only polishes inefficiency, has increased staff's the amount of labour, and can not guarantee to polish the butt joint complete, leads to the unable condition of polishing or polishing excessively of part, has reduced the quality to plank polishing burring, therefore we have designed a wood system furniture processing and have used burr equipment to solve above problem.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides the deburring equipment for processing the wooden furniture, which can be used for polishing the wooden plates with different sizes, has a wide application range, can be used for comprehensively deburring the surfaces of the wooden plates without moving the wooden plates, improves the working efficiency, reduces the labor capacity of workers and improves the deburring quality of the wooden plates.

In order to achieve the purpose, the invention adopts the following technical scheme:

the deburring device for processing wooden furniture comprises a base, wherein two supporting plates are fixedly connected to the base, a top plate is fixedly connected to the upper ends of the two supporting plates together, a servo motor is installed at the bottom of the top plate, a reciprocating lead screw is fixedly connected to the output end of the servo motor, the reciprocating lead screw penetrates through the supporting plates and is rotatably connected with the supporting plates, the other end of the reciprocating lead screw is rotatably connected with the other supporting plate, a sliding block matched with the reciprocating lead screw is sleeved on the reciprocating lead screw, the upper end of the sliding block is abutted to the bottom of the top plate, an electric telescopic rod is fixedly connected to the bottom of the sliding block, a polishing machine is fixedly connected to the output end of the electric telescopic rod, a dust cover positioned outside the polishing machine is installed on the outer wall of the fixed end of the electric telescopic rod, two track, two the common fixedly connected with slide in upper end of track piece, be equipped with on the slide and treat the burring plank, treat that the burring plank passes through fixture and install on the slide, transversely run through on the base be equipped with rather than rotate the horizontal pole of being connected, all be equipped with actuating mechanism between horizontal pole and the two track pieces, fixedly connected with supporting shoe on the base, be equipped with drive mechanism between supporting shoe and the horizontal pole, be equipped with between reciprocal lead screw and the backup pad with drive mechanism complex slewing mechanism, the bottom fixedly connected with and the sliding block assorted switch spare of roof, two the switch spare is located the both sides of sliding block.

Preferably, fixture is including fixing the quiet board on the slide, treat that burring plank offsets with quiet board, just sliding connection has the movable plate that offsets with treating burring plank on the slide, fixedly connected with fixed block on the slide, run through on the fixed block and be equipped with rather than threaded connection's adjusting screw, adjusting screw rotates with the movable plate to be connected, adjusting screw and the one end fixedly connected with hand wheel that the movable plate carried on the back mutually.

Preferably, actuating mechanism is including fixing the first gear on the horizontal pole, first gear is located the track inslot, the bottom fixedly connected with rack plate of track piece, rack plate and first gear intermeshing.

Preferably, the transmission mechanism includes a second gear fixedly connected with the cross bar, a rotation groove is formed in the supporting block in a penetrating mode, a shaft lever is connected in the rotation groove in a rotating mode, a third gear meshed with the second gear is fixedly connected to the shaft lever, a guide groove is formed in the other end of the shaft lever, a sliding column is connected in the guide groove in a sliding mode, a first spring is fixedly connected between the sliding column and the guide groove, a clamping mechanism is arranged between the sliding column and the rotation groove, and an electromagnet is fixedly connected to one end, back to the first spring, of the sliding column.

Preferably, the screens mechanism includes running through the axostylus axostyle and rather than sliding connection's fixture block, the inner wall that rotates the groove is equipped with a plurality of draw-in grooves that are the annular distribution, in the draw-in groove was gone into to the fixture block card, be equipped with the wedge groove on the slip post, sliding connection has the arc piece in the wedge groove, arc piece and fixture block fixed connection, just fixedly connected with second spring between the inner wall of arc piece and guide slot, the second spring housing is on the fixture block.

Preferably, the rotating mechanism comprises a rotating shaft rotatably connected with the supporting plate, driving wheels are fixedly connected to the rotating shaft and the reciprocating screw rod respectively, the two driving wheels are connected through a belt, a magnetic block is fixedly connected to one end, opposite to the supporting plate, of the rotating shaft, and the magnetic poles of the magnetic block on the side opposite to the electromagnet are opposite in polarity.

Preferably, the switch spare is including installing the box body in the roof bottom, the first electric contact of fixedly connected with in the box body, sliding connection has the second electric contact in the box body, establish fixedly connected with insulating spring between second electric contact and the first electric contact, the one end fixedly connected with collets that second electric contact and first electric contact carried on the back mutually, collets run through the box body and rather than sliding connection.

Preferably, the first electrical contact and the second electrical contact are electrically connected to the electromagnet.

Compared with the prior art, the invention has the beneficial effects that:

1. through the cooperation of reciprocal lead screw, electro-magnet, magnet etc. when burnishing machine reciprocating motion treats the burring plank and carries out burring processing, also can realize treating the removal of burring plank equidistance to can treat the burring plank and carry out complete burring processing, need not the manual work and remove and treat the burring plank, improve the efficiency of treating the burring plank processing greatly, also reduced staff's the amount of labour, and improve the quality to the plank burring.

2. When the electro-magnet outage, the post that slides resets under the effect of first spring, under the spacing of wedge groove, arc piece and fixture block remove to in making the fixture block card go into the draw-in groove, so the axostylus axostyle is by spacing unable rotation once more, thereby can guarantee to treat the stability when burring plank burring.

3. The deburring device can be used for deburring wood boards of different sizes, is wide in application range, can automatically move wood boards to be deburred, and is high in accuracy and rapid.

In conclusion, the wood board deburring machine has a reasonable structure, can polish wood boards with different sizes, is wide in application range, can carry out comprehensive deburring treatment on the surfaces of the wood boards without moving the wood boards, improves the working efficiency, reduces the labor capacity of workers and improves the wood board deburring quality.

Drawings

FIG. 1 is a schematic structural view of a deburring device for wooden furniture processing according to the present invention;

FIG. 2 is a top view of a base of the deburring device for wooden furniture processing according to the present invention;

FIG. 3 is a schematic view of the connection between the track groove and the track block in the deburring device for wooden furniture processing according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 1;

fig. 5 is a sectional view of a switch member of the deburring device for wooden furniture processing according to the present invention.

In the figure: 1 base, 2 supporting plates, 3 top plates, 4 servo motors, 5 reciprocating screw rods, 6 sliding blocks, 7 electric telescopic rods, 8 polishing machines, 9 dust covers, 10 transmission wheels, 11 belts, 12 cross rods, 13 sliding plates, 14 wood plates to be deburred, 15 static plates, 16 movable plates, 17 fixed blocks, 18 adjusting screws, 19 hand wheels, 20 shaft rods, 21 third gears, 22 second gears, 23 track grooves, 24 first gears, 25 track blocks, 26 rack plates, 27 rotating shafts, 28 magnetic blocks, 29 electromagnets, 30 sliding columns, 31 supporting blocks, 32 rotating grooves, 33 clamping grooves, 34 guide grooves, 35 first springs, 36 wedge-shaped grooves, 37 clamping blocks, 38 arc-shaped blocks, 39 second springs, 40 box bodies, 41 second electric contact pieces, 42 insulating springs, 43 first electric contact pieces and 44 insulating blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-5, a burr removing device for wooden furniture processing comprises a base 1, two support plates 2 are fixedly connected to the base 1, a top plate 3 is fixedly connected to the upper ends of the two support plates 2, a servo motor 4 is installed at the bottom of the top plate 3, a reciprocating screw rod 5 is fixedly connected to the output end of the servo motor 4, the reciprocating screw rod 5 penetrates through the support plates 2 and is rotatably connected with the support plates, the other end of the reciprocating screw rod 5 is rotatably connected with another support plate 2, and the reciprocating screw rod 5 is rotatably connected with the support plates 2 through bearings.

The reciprocating screw rod 5 is sleeved with a sliding block 6 matched with the reciprocating screw rod, the upper end of the sliding block 6 is abutted to the bottom of the top plate 3, the bottom of the sliding block 6 is fixedly connected with an electric telescopic rod 7, the output end of the electric telescopic rod 7 is fixedly connected with a polishing machine 8, the outer wall of the fixed end of the electric telescopic rod 7 is provided with a dust cover 9 positioned outside the polishing machine 8, the dust cover 9 can be connected with the air inlet end of a negative-pressure air fan, and the negative-pressure air fan is not.

The bottom of the base 1 is provided with two track grooves 23, track blocks 25 are connected in the two track grooves 23 in a sliding manner, and the track blocks 25 cannot be separated from the track grooves 23; the upper ends of the two track blocks 25 are fixedly connected with a sliding plate 13 together, a wood plate 14 to be deburred is arranged on the sliding plate 13, and the wood plate 14 to be deburred is arranged on the sliding plate 13 through a clamping mechanism.

Specifically, fixture is including fixing the quiet board 15 on slide 13, treat that burring plank 14 offsets with quiet board 15, and sliding connection has and treats movable plate 16 that burring plank 14 offsets on slide 13, fixedly connected with fixed block 17 on slide 13, run through on the fixed block 17 be equipped with rather than threaded connection's adjusting screw 18, adjusting screw 18 rotates with movable plate 16 to be connected, adjusting screw 18 and the one end fixedly connected with hand wheel 19 that movable plate 16 carried on the back mutually, through adjusting screw 18, it is spacing that burring plank 14 can be treated to quiet board 15 and movable plate 16 carries out stable centre gripping, stability when guaranteeing its burring.

Transversely run through on the base 1 and be equipped with rather than rotating the horizontal pole 12 of being connected, all be equipped with actuating mechanism between horizontal pole 12 and two track pieces 25, actuating mechanism is including fixing the first gear 24 on horizontal pole 12, first gear 24 is located track groove 23, the bottom fixedly connected with rack plate 26 of track piece 25, rack plate 26 and first gear 24 intermeshing, so horizontal pole 12 rotates and to realize first gear 24 and rotate, rack plate 26 removes can be realized in first gear 24 rotation, and then realize the removal of slide 13.

A supporting block 31 is fixedly connected to the base 1, a transmission mechanism is arranged between the supporting block 31 and the cross bar 12, the transmission mechanism comprises a second gear 22 fixedly connected with the cross bar 12, a rotating groove 32 penetrates through the supporting block 31, a shaft rod 20 is rotatably connected in the rotating groove 32, and a third gear 21 meshed with the second gear 22 is fixedly connected to the shaft rod 20; the other end of the shaft lever 20 is provided with a guide groove 34, a sliding column 30 is connected in the guide groove 34 in a sliding manner, a first spring 35 is fixedly connected between the sliding column 30 and the guide groove 34, a clamping mechanism is arranged between the sliding column 30 and the rotating groove 32, and an electromagnet 29 is fixedly connected at one end of the sliding column 30, which is opposite to the first spring 35.

Specifically, screens mechanism includes running through axostylus axostyle 20 and rather than sliding connection's fixture block 37, and the inner wall that rotates groove 32 is equipped with a plurality of draw-in grooves 33 that are annular distribution, and in fixture block 37 card was gone into draw-in groove 33, be equipped with wedge groove 36 on the slip post 30, sliding connection has arc piece 38 in wedge groove 36, arc piece 38 and fixture block 37 fixed connection, and fixedly connected with second spring 39 between the inner wall of arc piece 38 and guide slot 34, and second spring 39 overlaps on fixture block 37.

A rotating mechanism matched with the transmission mechanism is arranged between the reciprocating screw rod 5 and the supporting plate 2, the rotating mechanism comprises a rotating shaft 27 rotatably connected with the supporting plate 2, the rotating shaft 27 and the reciprocating screw rod 5 are both fixedly connected with transmission wheels 10, the two transmission wheels 10 are connected through a belt 11, one end of the rotating shaft 27, which is back to the supporting plate 2, is fixedly connected with a magnetic block 28, and the magnetic pole of the magnetic block 28, which is opposite to the electromagnet 29, is opposite in polarity.

The bottom of the top plate 3 is fixedly connected with switch pieces matched with the sliding block 6, the two switch pieces are positioned at two sides of the sliding block 6, each switch piece comprises a box body 40 arranged at the bottom of the top plate 3, a first electric contact piece 43 is fixedly connected in the box body 40, a second electric contact piece 41 is slidably connected in the box body 40, an insulating spring 42 is fixedly connected between the second electric contact piece 41 and the first electric contact piece 43, an insulating block 44 is fixedly connected at one end of the second electric contact piece 41, which is opposite to the first electric contact piece 43, penetrates through the box body 40 and is slidably connected with the box body, and the first electric contact piece 43 and the second electric contact piece 41 are electrically connected with the electromagnet 29; the second electrical contact 41 is T-shaped, and the first electrical contact 43 is annular and matches the second electrical contact 41.

In the invention, when the wood board 14 to be deburred is processed, a worker puts the wood board 14 to be deburred on the sliding plate 13 and abuts against the static plate 15, and then manually rotates the hand wheel 19, because the movable plate 16 cannot rotate under the limit of the sliding plate 13, when the adjusting screw 18 rotates along with the hand wheel 19, the movable plate 16 can move, and the movable plate 16 abuts against the wood board 14 to be deburred, so that the wood board 14 to be deburred can be stably clamped;

then starting the electric telescopic rod 7 to enable the dust cover 9 and the polishing machine 8 to abut against the upper end face of the wood board 14 to be deburred, then starting the servo motor 4 by a worker, enabling the servo motor 4 to work to drive the reciprocating screw rod 5 to rotate, and enabling the sliding block 6 to horizontally move on the reciprocating screw rod 5 due to the fact that the sliding block 6 cannot rotate under the limiting position of the top plate 3, so that the electric telescopic rod 7, the dust cover 9 and the polishing machine 8 can move, and the wood board 14 to be deburred can be polished through the polishing machine 8;

when the sliding block 6 moves to abut against one of the switch parts (the polishing machine 8 is separated from the board 14 to be deburred), namely, when the sliding block 6 abuts against the insulating block 44, the sliding block 6 abuts against the insulating block 44 to move, so that the second electric contact piece 41 moves and compresses the insulating spring 42, when the second electric contact piece 41 abuts against the first electric contact piece 43, the electromagnet 29 is electrified to work, because the magnetic poles of the opposite surfaces of the electromagnet 29 and the magnetic block 28 are opposite in polarity, the electromagnet 29 and the magnetic block 28 attract each other, the sliding column 30 slides, at the moment, the arc-shaped block 38 is not limited any more, under the elastic force of the second spring 39, the clamping block 37 is separated from the clamping groove 33, and thus, the shaft rod 20 and the rotating groove;

the rotating reciprocating screw rod 5 drives the transmission wheel 10 to rotate, under the coordination of the transmission wheel 10 and the belt 11, the rotation of the rotating shaft 27 can be realized, further, the rotation of the magnetic block 28, the electromagnet 29, the shaft rod 20 and the third gear 21 can be realized, the third gear 21 rotates to be meshed with the second gear 22 and drives the second gear 22 to rotate, thereby, the rotation of the cross rod 12 is realized, the cross rod 12 rotates to drive the two first gears 24 to rotate, through the coordination of the first gears 24 and the rack plate 26, the movement of the rack plate 26 and the track block 25 can be realized, further, the movement of the sliding plate 13 can be realized, further, the movement of the wood plate 14 to be deburred can be realized, when the sliding block 6 moves back, the insulating block 44 is not extruded any more, under the action of the insulating spring 42, the separation of the second electric contact piece 41 and the first electric contact piece 43 can be realized, at the moment, the electromagnet 29 is powered, the arc-shaped block 38 and the fixture block 37 move, and the fixture block 37 is clamped in the clamping groove 33, so that the shaft rod 20 is limited again and cannot rotate, and the stability of the wood board 14 to be deburred during deburring can be ensured;

when the sliding block 6 moves back, the wood board 14 to be deburred can be polished again through the polishing machine 8, the moving distance of the wood board 14 to be deburred is matched with that of the polishing machine 8, so that the wood board 14 to be deburred can be butted when being deburred, and the wood board 14 to be deburred can be completely polished and deburred;

when sliding block 6 offsets with another switch spare, the same reason (electro-magnet 29 is through two accuse switch control), 8 reciprocating motion of burnishing machine so when treating burring plank 14 and carry out burring, also can realize treating the removal of burring plank 14 equidistance to can treat burring plank 14 and carry out complete burring, need not artifical the removal and treat burring plank 14, improved the efficiency of treating the processing of burring plank 14 greatly, also reduced staff's the amount of labour, and improve the quality to the plank burring.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The deburring device for processing wooden furniture comprises a base (1) and is characterized in that two supporting plates (2) are fixedly connected to the base (1), a top plate (3) is fixedly connected to the upper ends of the two supporting plates (2) jointly, a servo motor (4) is installed at the bottom of the top plate (3), a reciprocating lead screw (5) is fixedly connected to the output end of the servo motor (4), the reciprocating lead screw (5) penetrates through the supporting plates (2) and is rotatably connected with the supporting plates, the other end of the reciprocating lead screw (5) is rotatably connected with the other supporting plate (2), a sliding block (6) matched with the reciprocating lead screw (5) is sleeved on the reciprocating lead screw (5), the upper end of the sliding block (6) is abutted against the bottom of the top plate (3), an electric telescopic rod (7) is fixedly connected to the bottom of the sliding block (6), and a polishing machine (8) is fixedly connected to the, the outer wall of the fixed end of the electric telescopic rod (7) is provided with a dust cover (9) positioned outside the polishing machine (8), the bottom of the base (1) is provided with two track grooves (23), the two track grooves (23) are internally and evenly connected with track blocks (25) in a sliding manner, the upper ends of the two track blocks (25) are jointly and fixedly connected with a sliding plate (13), the sliding plate (13) is provided with a board (14) to be deburred, the board (14) to be deburred is arranged on the sliding plate (13) through a clamping mechanism, the base (1) is transversely provided with a cross rod (12) in rotary connection with the base in a penetrating manner, a driving mechanism is arranged between the cross rod (12) and the two track blocks (25), the base (1) is fixedly connected with a supporting block (31), a transmission mechanism is arranged between the supporting block (31) and the cross rod (12), and a rotating mechanism matched with the transmission mechanism is arranged between the reciprocating, the bottom fixedly connected with of roof (3) and sliding block (6) assorted switch spare, two the switch spare is located the both sides of sliding block (6).

2. The wooden furniture processing deburring device according to claim 1, wherein the clamping mechanism comprises a static plate (15) fixed on a sliding plate (13), the wood plate (14) to be deburred abuts against the static plate (15), a movable plate (16) abutting against the wood plate (14) to be deburred is connected on the sliding plate (13) in a sliding manner, a fixed block (17) is fixedly connected on the sliding plate (13), an adjusting screw (18) in threaded connection with the fixed block (17) penetrates through the fixed block (17), the adjusting screw (18) is rotatably connected with the movable plate (16), and a hand wheel (19) is fixedly connected at one end of the adjusting screw (18) opposite to the movable plate (16).

3. A deburring apparatus for processing wooden furniture as claimed in claim 1, wherein said driving mechanism comprises a first gear (24) fixed to said cross bar (12), said first gear (24) is located in said track groove (23), a rack plate (26) is fixedly attached to the bottom of said track block (25), said rack plate (26) is engaged with said first gear (24).

4. A deburring apparatus for wooden furniture manufacture according to claim 1, the transmission mechanism comprises a second gear (22) fixedly connected with the cross rod (12), a rotating groove (32) is arranged on the supporting block (31) in a penetrating way, a shaft lever (20) is rotationally connected in the rotating groove (32), a third gear (21) which is meshed with the second gear (22) is fixedly connected to the shaft lever (20), the other end of the shaft lever (20) is provided with a guide groove (34), a sliding column (30) is connected in the guide groove (34) in a sliding way, a first spring (35) is fixedly connected between the sliding column (30) and the guide groove (34), a clamping mechanism is arranged between the sliding column (30) and the rotating groove (32), and one end of the sliding column (30) back to the first spring (35) is fixedly connected with an electromagnet (29).

5. The wooden furniture processing deburring device according to claim 4, wherein the clamping mechanism comprises a clamping block (37) penetrating through the shaft rod (20) and connected with the shaft rod in a sliding manner, a plurality of clamping grooves (33) distributed in an annular manner are formed in the inner wall of the rotating groove (32), the clamping block (37) is clamped in the clamping grooves (33), a wedge-shaped groove (36) is formed in the sliding column (30), an arc-shaped block (38) is connected in the wedge-shaped groove (36) in a sliding manner, the arc-shaped block (38) is fixedly connected with the clamping block (37), a second spring (39) is fixedly connected between the arc-shaped block (38) and the inner wall of the guide groove (34), and the second spring (39) is sleeved on the clamping block (37).

6. The deburring device for processing wooden furniture according to claim 5, wherein the rotating mechanism comprises a rotating shaft (27) rotatably connected with the support plate (2), the rotating shaft (27) and the reciprocating screw rod (5) are both fixedly connected with transmission wheels (10), the two transmission wheels (10) are connected through a belt (11), one end of the rotating shaft (27) opposite to the support plate (2) is fixedly connected with a magnet (28), and the magnetic poles of the magnet (28) and the side opposite to the electromagnet (29) are opposite in polarity.

7. A deburring apparatus for processing wooden furniture as claimed in claim 6, wherein said switch member comprises a case (40) mounted at the bottom of the top plate (3), said case (40) being fixedly connected with a first electrical contact (43), said case (40) being slidably connected with a second electrical contact (41), an insulating spring (42) being fixedly connected between said second electrical contact (41) and said first electrical contact (43), an insulating block (44) being fixedly connected to the end of said second electrical contact (41) opposite to said first electrical contact (43), said insulating block (44) extending through said case (40) and being slidably connected thereto.

8. A deburring apparatus for wooden furniture manufacture according to claim 7 wherein said first electrical contact (43) and second electrical contact (41) are electrically connected to an electromagnet (29).