CN210702557U - Automatic cutter replacing device for 3D printing equipment - Google Patents

Abstract

The utility model discloses a 3D printing apparatus is with automatic cutter device of changing, including clamping device, clamping device includes the centre gripping frame, the upper portion fixedly connected with sword box of centre gripping frame, be equipped with the slip guider in the centre gripping frame, the slip guider includes the frame body, frame body and centre gripping frame sliding connection, the terminal surface all is provided with the cutter through-hole about the frame body, this internal regulation catch bar that is provided with of frame, cutter in the sword box gets into the frame originally internally through the cutter through-hole, and under the promotion of adjusting the catch bar, the cutter is promoted to cutter through-hole department, cutter splint fix the bottom at centre gripping frame and frame body respectively, when relative displacement takes place for centre gripping frame and frame body, cutter splint realizes loosening or pressing from both sides tightly, the cutter directly falls to cutter splint department and is pressed from both sides tightly. The utility model discloses an automatic change cutter device has realized the automation mechanized operation that the cutter was changed and was installed, has solved the problem of the inefficiency that the artifical cutter of changing exists, troublesome poeration.

Description

Automatic cutter replacing device for 3D printing equipment

Technical Field

The utility model relates to a 3D printing apparatus field, in particular to 3D printing apparatus is with automatic cutter device of changing.

Background

The 3D printing technology is emerging from the 20 th 90 s to the present, and the additive manufacturing technology based on the principle of the laminated printing is continuously applied to the military field, the medical field, the automobile field and other aspects along with the abundant change of the printing medium and the diversity combination of the mechanical structure, and people's lives are continuously advanced and improved, while the metal 3D printing is taken as a major branch in the 3D printing technology, and the potential technology application thereof is a major support of the 3D printing industry in the future, wherein the metal 3D printing technology represented by the Selective Laser Sintering (SLM) technology has obvious advantages in the aspects of density of a formed part, mechanical properties, diversity of processed material types and the like, and the principle thereof is that the metal powder is completely melted under the thermal action of the Laser beam and finally realizes the layer-by-layer accumulation of the material through cooling and solidification, and the factors influencing the final printing precision of the finished product are many, for example, laser power, scanning path, metal powder quality and the like, and the quality of each layer of powder tiling is also one of the factors influencing printing precision, and at the present stage, the quality of the tiled powder is greatly improved by means of changing scraper materials, the appearance of a scraper contacting the powder surface, a scraper installation mode and the like, but the abrasion of the scraper is always an unavoidable problem in the printing process, and especially when the problem causes that the scraper needs to be replaced in the printing process, the printing efficiency is obviously influenced, and the time cost is increased.

Chinese utility model patent (application number 201820050828.1) has mentioned a scraper mounting structure in metal 3D printer cabin, change the passageway through setting up specific scraper, can realize the operation of manual change scraper under the prerequisite that does not change the under-deck atmosphere system, nevertheless consider the scraper and arrive the critical wearing and tearing state's when influencing powder surface layer quality uncertainty in the course of the work, this just requires that the operation of changing the scraper can be done rapidly to the 3D printer when discovering powder layer surface quality to descend, obviously, manual operation is unable completion.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: to the problem that above-mentioned exists, provide a 3D printing apparatus with automatic cutter device of changing to realize not changing the quick replacement of printing indoor atmosphere environment under the automatic quick replacement of accomplishing the cutter that has worn and torn by the machine, improve the automation of printing the process, overcome the not enough that artifical change exists.

The utility model adopts the technical scheme as follows: an automatic cutter replacing device for a 3D printing device comprises a clamping device and a cutter clamping plate, and is characterized in that the clamping device is arranged in a printing cabin and provides moving power through a driving device, the clamping device comprises a clamping frame with a frame structure, the upper portion of the clamping frame is fixedly connected with a cutter box for providing a cutter, a sliding guide device is arranged in the clamping frame, the sliding guide device comprises a frame body with a hollow structure, the outer side edge of the frame body is in sliding connection with the inner side edge of the clamping frame, cutter through holes communicated with the hollow structure are formed in the upper end face and the lower end face of the frame body, the cutter through holes are not located in the middle of the end face of the frame body and are arranged in a staggered mode, an adjusting push rod is arranged in the hollow structure of the frame body and is fixedly connected with the clamping frame, the cutter in the cutter box enters the hollow structure of the frame body through the cutter through hole in the upper end face of the frame body, under the pushing of the adjusting push rod, the cutter in the hollow structure of the frame body is pushed to the cutter through hole in the lower end face of the frame body and then leaves the frame body, the cutter clamping plates are respectively fixed at the bottoms of the clamping frame and the frame body, when the clamping frame and the frame body are relatively displaced, the cutter clamping plates are loosened or clamped, and the cutter coming out of the frame body directly falls to the cutter clamping plates and is clamped.

Further, in order to enable the cutter to smoothly pass through the cutter through hole, a sliding guide structure is arranged on the end face, provided with the cutter through hole, of the frame body, and the cutter slides to the cutter through hole through the sliding guide structure until passing through the cutter through hole. Through the guide effect of the sliding guide structure, the cutter can smoothly pass through the cutter through hole.

Furthermore, the side surface of the frame body is open to form a side surface through hole, a transverse sliding block is fixedly connected to the side surface through hole and protrudes out of the frame body, the frame body is in sliding fit with the side edge of the clamping frame through the transverse sliding block, an interval is reserved between the transverse sliding block and the top of the side surface through hole to form a side surface channel, and the adjusting push rod penetrates through the side surface channel and can freely slide along the trend of the side surface channel.

Further, in order to better realize that there is relative displacement between centre gripping frame and the frame body, the inner wall of printing the cabin is provided with the push rod, the one end and the printing cabin fixed connection of push rod, its other end can pass the centre gripping frame and cooperate with horizontal slider, the length direction of push rod is parallel with the moving direction of centre gripping frame, when centre gripping frame drove the frame body together towards the push rod removal, the push rod passes the horizontal slider contact cooperation on centre gripping frame and the frame body, when the centre gripping frame continues to move towards the push rod, the frame body received the limiting displacement of push rod and no longer removed, and then made and produced relative displacement between centre gripping frame and the frame body.

Further, in order to make the utility model discloses can take place relative displacement better between frame body and the centre gripping frame, centre gripping frame and frame body sliding connection's side are the slip limit, the one end sliding connection that the push rod was kept away from on the slip limit has the regulation seat, it is relative with horizontal slider to adjust the seat, adjusts and is provided with the pressure spring between seat and the horizontal slider, and the both ends of pressure spring imbed respectively in adjusting seat and the horizontal slider, the pressure spring has initial compression volume to there is thrust between horizontal slider and the regulation seat, when push rod and horizontal slider contact cooperation and centre gripping frame continue towards the push rod removal, the pressure spring is compressed.

In order to further make the cutter pass through the cutter through-hole smoothly, the sliding guide structure of terminal surface is located the frame body under the frame body to be located frame body up end cutter through-hole under, the sliding guide structure includes a plurality of sliding guide piece, and the sliding guide structure is constituteed jointly to a plurality of sliding guide piece, sliding guide piece and frame body fixed connection, sliding guide piece cooperate with the spout of cutter bottom, so that the cutter can be followed sliding guide piece and slided to cutter through-hole department.

In order to ensure that the cutter can pass through the cutter through hole in a moment so as to prevent the cutter from deflecting and clamping the cutter at the cutter through hole, one end of the sliding guide block extends to the upper side of the cutter through hole so that one end of the sliding guide block is suspended at the cutter through hole to form a tail end guide part, and when the cutter slides to the tail end guide part along the sliding guide block, the cutter can pass through the cutter through hole under the condition of not deflecting in the moment of leaving the tail end guide part.

Furthermore, a guide rail is arranged in the printing cabin, the clamping device is in transmission connection with the driving device through a connecting structure, and the driving device drives the clamping device to move along the guide rail in the printing cabin.

In order to drive better the utility model discloses an automatic change cutter device, drive arrangement includes servo motor, and servo motor passes through the coupling and is connected with screw drive, the guide rail sets up in the both sides of lead screw and parallel with the lead screw, the lead screw passes through bearing and fixes in one side of printing the cabin, and the cover is equipped with screw nut on the lead screw, screw nut and nut seat fixed connection, one side fixedly connected with axle slide of nut seat, the axle slide spanes between the guide rail and through guide rail slider and guide rail sliding connection, and the side fixed connection that clamping device connecting plate and clamping device were passed through to one side that the guide rail was kept away from to the axle slide, servo motor drives the axle slide through the lead screw and slides along the guide rail, and then drives clamping device and remove.

Furthermore, in order to realize automatic control and movement, one side of the adjusting seat opposite to the frame body is provided with a straight handle limit switch, the straight handle limit switch is connected with an external control system through a signal generator and a signal transmission line and realizes signal transmission, and when the frame body is in contact with the straight handle limit switch, the straight handle limit switch transmits a signal to the external control system through the signal generator.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model can realize the operation of replacing the cutter without changing the atmosphere in the printing cabin, greatly improves the production efficiency, and reduces the production cost because the cabin door does not need to be opened to replace the cutter and the atmosphere is created again;

2. on the premise of not increasing an additional power source, a series of automatic tool changing actions such as releasing an old tool, clamping a new tool and the like can be realized through the compressed spring energy storage and release process;

3. the storage and the placement and the integral replacement of new cutters are realized through the cutter box, the cutters are placed in the inner cavity of the cutter box in a single-row overlapping mode, and the storage capacity of the cutters can be properly adjusted according to the size of the cabin;

4. the utility model discloses an automation mechanized operation of single cutter change and installation has solved the problem of the artifical change cutter existence inefficiency, slow, the troublesome poeration of speed.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of an automatic cutter replacing device for a 3D printing apparatus according to the present invention;

FIG. 2 is a schematic structural view of a driving device of the automatic cutter replacing device of the present invention;

FIG. 3 is a schematic structural view of the shaft sliding plate and the clamping device according to the present invention;

FIG. 4 is a schematic view of the connection between the holding device and the holding device according to the present invention;

FIG. 5 is a schematic cross-sectional view of the automatic cutter changer of the present invention;

fig. 6 is a schematic view of the fitting structure of the clamping device and the sliding guide device of the present invention;

fig. 7 is a schematic three-dimensional structure diagram of the clamping device of the present invention;

fig. 8 is a schematic three-dimensional structure of the sliding guide device of the present invention;

fig. 9 is a schematic cross-sectional view of the clamping device of the present invention after being engaged with the sliding guide;

fig. 10 is a schematic three-dimensional structure of a cutter (scraper) according to the present invention;

fig. 11 is a schematic three-dimensional structure diagram of the knife box of the present invention;

fig. 12 is a schematic cross-sectional structural view of the holding device of the present invention;

FIG. 13 is a schematic view of the automatic cutter changer of the present invention in a retracted state;

fig. 14 is a schematic view of the automatic cutter changer of the present invention after replacing the new cutter.

The labels in the figure are: 1 is a clamping device, 101 is a clamping frame, 102 is a sliding edge, 103 is a sliding guide device sliding groove, 104 is a cutter box sliding groove, 105 is an adjusting push rod, 106 is a connecting edge, 107 is an adjusting seat, 108 is a square groove, 109 and 213 are compression spring counter bores, 110 is a straight handle limit switch, 111 is a dovetail-shaped limit block, 2 is a sliding guide device, 201 is a frame body, 202 is an upper end face, 203 is a lower end face, 204 is a first cutter through hole, 205 is a second cutter through hole, 206 is a sliding guide structure, 207 is a sliding guide block, 208 is a tail end guide part, 209 is a side through hole, 210 is a transverse sliding block, 211 is a side channel, 212 is a push rod counter bore, 3 is a compression spring, 4 is a driving device, 401 is a servo motor, 402 is a lead screw, 403 is a lead screw nut, 404 is a nut seat, 405 is a bearing support, 406 is a coupler, 5 is a cutter, 501 is a sliding groove part, 6 is a printing chamber, 7 is a push rod, 8 is a guide rail, 801 is a shaft sliding plate, 802 is a guide rail sliding block, 803 is a cutter adapter plate, 804 is a clamping device connecting plate, 9 is a first cutter clamping plate, 10 is a second cutter clamping plate, 11 is a cutter box, 1101 is a cutter box main body, 1102 is a handle, 1103 is a short cross handle, 1104 is an observation hole, and 1105 is a dovetail-shaped guide rail.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 and 2, an automatic tool changing device for a 3D printing apparatus comprises a clamping device 1, a sliding guide device 2, a tool box 11 and a driving device 4, wherein the driving device 4 is slidably connected to a printing cabin 6 through a guide rail 8, as shown in fig. 1 and 2, the driving device 4 comprises a servo motor 401, the servo motor 401 is fixedly arranged on the right outer wall of the printing cabin 6, a motor shaft of the servo motor 401 transmits power to a lead screw 402 through a coupler 406, the lead screw 402 passes through a lead screw nut 403, a nut seat 404 is fixed on the lead screw nut 403, the lead screw 402 is fixed on the inner wall of one side of the printing cabin 6 through a bearing support 405, the guide rails 8 are respectively arranged in parallel on the upper and lower sides of the lead screw, the guide rail 8 is positioned outside the bearing support 405 and fixed on the inner wall of the printing cabin 6, a shaft sliding plate 801 is arranged between the guide rails 8, the shaft sliding plate, the shaft sliding plate 801 is connected with the guide rail 8 in a sliding mode through the guide rail sliding block 802, the guide rail sliding block 802 is sleeved on the guide rail 8, one side of the nut seat 404 is fixedly connected with the shaft sliding plate 801, and the shaft sliding plate 801 can freely slide on the guide rail 8. The servo motor 401 converts the rotation motion into the linear motion through the lead screw 402, and under the action of the motion of the lead screw 402, as the nut base 404 of the lead screw 402 is fixedly connected with the shaft sliding plate 801, the lead screw 402 drives the shaft sliding plate 801 to make the linear motion along the guide rail 8, thereby realizing the driving of the shaft sliding plate 801. Of course, the above description only specifically describes the structure of one driving device, and as an alternative technical means, the above driving device may be replaced by other driving structures, for example, the driving device may be driven by conventional hydraulic or pneumatic, as long as the shaft sliding plate 801 can slide back and forth on the guide rail 8.

Further, a cutter adapter plate 803 is fixedly connected to the other side of the shaft sliding plate 801 (i.e. the side far away from the guide rail 8), one side of the cutter adapter plate 803 is fixedly attached to the shaft sliding plate 801, the other side of the shaft sliding plate is fixedly connected to a clamping device connecting plate 804, the clamping device 1 is fixedly connected to the cutter adapter plate 803 through the clamping device connecting plate 804, the clamping device connecting plate 804 has a triangle-like frame structure, as shown in fig. 3-5, one side of the clamping device connecting plate 804 is fixedly attached to the cutter adapter plate 803, and a sharp corner portion of the clamping device connecting plate 804 far away from the side is fixedly connected to the clamping device 1 through a connecting plate (not shown in the figure), so that a triangle-like cavity with a certain space is formed in the clamping device connecting plate 804, and such an arrangement not only can ensure the structural stability of the clamping device connecting plate 804 (when the clamping device connecting, the hypotenuse and lateral sides of which are not susceptible to bending deformation) and can also facilitate the insertion of installation and adjustment tools into the fixture attachment plate 804 for manipulation.

Further, the clamping device 1 includes a clamping frame 101 having a frame structure, as shown in fig. 6 and 7, the clamping frame 101 is configured to clamp the sliding guide device 2, at least one inner side surface of the clamping frame 101 is provided with a sliding groove or a sliding block, the side surface of the inner side surface having the sliding groove or the sliding block is the sliding edge 102, at least one side surface of the sliding guide device 2 is in sliding fit with the sliding groove or the sliding block of the sliding edge 102 to realize clamping, the sliding guide device 2 can freely slide along the length direction of the sliding edge 102, the clamping frame 101 is fixedly connected to the driving device 4 through a clamping device connecting plate 804, and the driving device 4 drives the shaft sliding plate 801 to move, so as to drive the clamping frame 101 to move along the length direction of the sliding edge 102. In the embodiment of fig. 7, the clamping frame 101 is a frame structure having a "C" shape, and two symmetrical side edges (i.e. the left and right side edges of the clamping frame 101) are provided with sliding guide grooves 103 (of course, sliding blocks) on the inner sides, which become the sliding edges 102, and the other side is a connecting edge 106, the clamping frame 101 is slidably connected with the sliding guide 2 through the sliding edges 102, and the sharp corner of the clamping device connecting plate 804 is fixedly connected with the outer side of one sliding edge 102 (i.e. fixedly connected with the sliding edge 102 on the right side of the clamping frame 101). Further, a sliding groove or a sliding block is disposed on an upper end surface of at least one sliding edge 102, the sliding groove or the sliding block on the upper end surface of the sliding edge 102, through which the knife box 11 passes, is slidably connected to the clamping frame 101, and the knife box 11 can slide along a length direction of the sliding edge 102, for example, in fig. 11, the knife box sliding grooves 104 (of course, a sliding block may be disposed) are disposed on the upper end surfaces of the sliding edges 102, and the knife box 11 is slidably connected to the clamping frame 101 through the knife box sliding grooves 104.

Further, as shown in fig. 8 and 9, the sliding guide 2 includes a frame body 201 having a hollow structure, the end face of the frame body 201 is opened with cutter through holes for the passage of the cutters 5, the cutter through holes are respectively disposed on symmetrical end faces, and the cutter through holes are not located in the middle of the end faces, the cutter through holes on the symmetrical end faces are staggered so that the cutter through holes are not directly opposite to each other, the cutter through holes communicate with the hollow cavity of the frame body 201, in the embodiment of fig. 8, the upper end face 202 and the lower end face 203 of the frame body 201 are respectively provided with a first cutter through hole 204 and a second cutter through hole 205, the first cutter through hole 204 is disposed on the left side of the upper end face 202 (as determined by the view facing fig. 8), the second cutter through hole 205 is disposed on the right side of the lower end face 203, the first cutter through hole 204 and the second cutter through hole 205 are staggered so that the width and the length thereof are both matched with the, the height of the hollow cavity of the frame body 201 is matched with the height of the cutter 5, namely the height is the same. The upper end surface 202 and the lower end surface 203 of the frame body 201 are provided with sliding guide structures 206, and the cutter 5 (i.e., the scraper) slides to the cutter through hole through the sliding guide structures 206 until passing through the cutter through hole.

Further, the sliding guide structure 206 is matched with the bottom of the cutter for sliding, the sliding guide structure 206 may be composed of a plurality of sliding guide blocks 207, of course, the sliding guide structure 206 may also be composed of other structures, for example, may be composed of a sliding chute, a sliding rail, etc., when the sliding guide structure 206 is composed of a plurality of sliding guide blocks 207, for example, in the embodiment of fig. 8, it may be composed of a pair of sliding guide blocks 207, the sliding guide blocks 207 may be a long rectangular structure or other convex structures, the sliding guide blocks 207 are fixedly disposed on the frame body 201 and are perpendicular to the through hole of the cutter, the sliding guide blocks 207 of the lower end surface 203 of the frame body 201 are located in the frame body 201, in order to better fix the cutter 5, the sliding guide blocks 207 are located at the short side ends of the through hole of the cutter, when the bottom of the cutter 5 is matched with the sliding guide blocks 207, the long side direction of the cutter 5 is restricted by the slide guide block 207, and the cutter 5 can slide only in the long side direction of the slide guide block 207, and is not easily deflected.

In order to facilitate the tool 5 to be exactly engaged and slidably engaged with the sliding guide block 207 on the lower end surface 203 when falling on the sliding guide block 207, the sliding guide block 207 beside the second tool through hole 205 is located right below the first tool through hole 204, when the tool 5 passes through the first tool through hole 204, the tool 5 is exactly fallen on the sliding guide block 207, and then under the driving action, the tool 5 slides to the second tool through hole 205 through the sliding guide block 207 and further smoothly passes through the second tool through hole 205.

In order to ensure that the tool 5 can pass through the tool through hole at an instant to prevent the tool 5 from deflecting and jamming at the tool through hole, one end of the sliding guide block 207 extends to above the tool through hole to make one end of the sliding guide block 207 suspend at the tool through hole to form the terminal guide portion 208, as shown in fig. 8 and 9, when the tool 5 slides along the sliding guide block 207 to the terminal guide portion 208, at the instant of leaving the terminal guide portion 208, the tool 5 can pass through the tool through hole without deflecting, thereby avoiding the problems of deflecting and jamming. Further, the knife 5 of the present invention may be a scraper for 3D printing equipment, as shown in fig. 10, fig. 10 shows a commonly used scraper structure, although the scraper may have other structural types, which has no substantial influence on the implementation of the present invention, the cross section of the scraper structure in fig. 10 is formed by combining "T" and "v", the outer side of the "v" of the lower portion is arc-shaped for facilitating the release of the old scraper, the two ends of the "v" are engaged with the inner sides of the first knife clamp 9 and the second knife clamp 10, as shown in fig. 9, so as to ensure that the scraper (i.e. the knife 5) does not deviate during the operation, the two sides of the end surface of the knife 5 are provided with chute portions 501 for engaging with the sliding guide 207 so as to facilitate the relative lateral translation of the scraper, the chute portions 501 of the knife 5 are disposed at the middle position of the end surface of the knife 5, and the cutter through hole protrudes from the two ends of the cutter 5, because the shape and the size of the cutter through hole are matched with the cutter 5, the length of the tail end guide part 208 which is suspended at the cutter through hole is half of the width size of the cutter 5, when the cutter 5 slides to the cutter through hole along the sliding guide block 207, the cutter 5 does not fall off immediately due to the existence of the tail end guide part 208, but continues to slide along the length of the tail end guide part 208 until the chute part 501 of the cutter 5 is separated from the tail end guide part 208, at the moment, the cutter 5 is just positioned right above the cutter through hole and aligned with the cutter through hole one by one, the cutter 5 directly and vertically falls down without deflection and hole clamping problems, and the cutter 5 is ensured to be just clamped and matched with the next sliding guide structure in a sliding way.

Further, a side through hole 209 is formed by opening the side of the frame body 201, as shown in fig. 9, a transverse slider 210 is fixedly connected to the side through hole 209, the transverse slider 210 protrudes out of the frame body 201, the outer side surface of the transverse slider 210 is of a dovetail flange structure, the sliding guide device chute 103 is of a dovetail groove structure, and the transverse slider 210 is in sliding fit with the sliding guide device chute 103 through the dovetail flange structure on the outer side thereof, so that the sliding guide device 2 is clamped inside the clamping device 1, that is, the clamping frame 101 of the clamping device 1 wraps and clamps the frame body 201 of the sliding guide device 2.

In one embodiment of the present invention, in order to facilitate the driving mechanism to enter the frame body 201 to drive the cutter 5 to move, the lateral slider 210 is spaced from the top of the lateral through-hole 209 to form a lateral channel 211, as shown in fig. 5, 7 and 9, the lateral channel 211 is used for accommodating the adjusting push rod 105, the adjusting push rod 105 is arranged at the inner side of the sliding edge 102, as shown in fig. 7, the adjusting pushing rod 105 is disposed above the sliding guide 103, one end of the adjusting pushing rod 105 penetrates the sliding edge 102 and is exposed outside the sliding edge 102 to form a pushing rod adjusting part (i.e. a cross handle), the other end of the adjusting pushing rod 105 extends into the hollow cavity of the sliding guide 2, i.e. into the hollow cavity of the frame body 201, the adjusting push rod 105 can slide freely along the direction of the side channel 211, and the adjusting push rod 105 is used for pushing the cutter 5 in the frame body 201 to slide along the sliding guide block 207 to the through hole of the cutter. That is, when the frame body 201 and the clamping frame 101 are displaced relatively, the adjusting push rod 105 can move along the side channel 211, and when the cutter 5 is located at the right side of the adjusting push rod 105, the adjusting push rod 105 moves rightwards, so that the cutter 5 can be pushed rightwards, and the cutter 5 is close to the second cutter through hole 205 until the cutter falls into the second cutter through hole 205.

In an embodiment of the present invention, the first tool holder plate 9 is fixedly connected to the lower portion of the holding frame 101, the second tool holder plate 10 is fixedly connected to the bottom portion of the frame body 201, the first tool holder plate 9 and the second tool holder plate 10 are combined to form a tool holder plate, as shown in fig. 9, the tool holder plate is used for holding the tool 5, further, the first tool holder plate 9 is disposed below the connecting edge 106 of the holding frame 101, and the second tool holder plate 10 is disposed below the second tool through hole 205.

Further, as shown in fig. 11, the knife box 11 includes a knife box main body 1101 with a hollow shape, the knives 5 are stored in the knife box main body 1101 in a single-row overlapping manner, the shape of the knife box main body 1101 may be a rectangular shape, but it may also be other shapes, such as a rectangular shape, a half arc shape, etc., a sliding notch (not marked in the figure) is provided in the inner cavity of the knife box main body 1101 for guiding and limiting the knife posture, a handle 1102 is provided on one side surface of the knife box 11 for facilitating the push-pull action when the knife box 11 is replaced, the side surface is further provided with a pair of short cross handles 1103, when the knife box 11 is installed in place, the short cross handles 1103 are screwed out, the bottom of the knife box 11 is clear, the new knives fall, the bottom of the new knives will contact with the right side of the upper end surface 202 of the frame body 201, the state of the lowest layer of the knife box 11 can be observed through an observation hole 1104 outside, a pair of guide rails or sliding grooves are distributed at the lower end of the knife box 11, in the example of fig. 11, the lower end of the knife box 11 is provided with a pair of dovetail guide rails 1105, and the upper end surface of the sliding edge 102 of the clamping frame 101 is provided with a dovetail knife box sliding groove 104, as shown in fig. 7, the dovetail guide rails 1105 are in sliding fit with the knife box sliding groove 104, and a dovetail limit block 111 is further arranged in the knife box sliding groove 104, and after the knife box 11 is in sliding fit with the knife box sliding groove 104 through the dovetail guide rails 1105, the position of the knife box 11 is fixed through the dovetail limit block 111 to limit the sliding thereof.

In the above, the knife box 11 is fixedly connected to the upper portion of the holding device 1, the sliding guide device 2 is slidably connected to the inside of the holding device 1, the holding device 1 is fixedly connected to the knife adapter plate 803 through the holding device connecting plate 804, when the driving device drives the shaft slide to move along the guide rail 8, the holding device 1 drives the knife box 11 and the sliding guide device 2 to move synchronously, so that the knife in the knife box can enter between the knife clamps to replace the used knife in order to make the relative displacement between the holding device 1 and the sliding guide device 2, in one embodiment of the present invention, the inner wall of the printing chamber 6 is fixedly provided with the push rod 7, one end of the push rod 7 is fixedly connected to the inner wall of the printing chamber 6 (i.e. fixedly connected to the inner wall on the left side of the printing chamber 6), and the other end thereof can pass through the connecting edge 106 of the holding, a through hole (not marked in the figure) for the push rod 7 to pass through is arranged on the connecting edge 106, a push rod counter bore 212 is arranged on one surface, facing the push rod 7, of the transverse slider 210 of the sliding guide device 2, and the push rod counter bore 212 is used for accommodating the end part of the push rod 7 extending into the connecting edge 106, that is, when the clamping device 1 moves towards the push rod 7 (namely, moves leftwards), the knife box 11 and the sliding guide device 2 also move synchronously towards the push rod 7, when the clamping device 1 gets closer to the push rod 7, the push rod 7 passes through the connecting edge 106 of the clamping frame 101 and is inserted into the transverse slider 210 through the push rod counter bore 212, at this moment, the sliding guide device 2 cannot move continuously towards the push rod 7 due to the blocking effect of the push rod 7, the clamping device 1 does not move continuously towards the push rod 7 due to the blocking effect of the push rod 7, and simultaneously drives the knife box, The relative displacement between the knife box 11 and the sliding guide 2 is generated:

for the tool box 11, under the condition of relative displacement, the tool 5 at the lower part of the tool box 11 slides leftwards along the sliding guide block 207 on the upper end surface of the frame body 201 to the first tool through hole until the tool 5 falls down and is in sliding fit with the sliding guide block 207 on the lower end surface 203;

as for the clamping frame 101, since the clamping frame 101 is slidably connected with the frame body 201, the adjusting push rod 105 inside the sliding edge 102 of the clamping frame 101 moves leftward along the side channel 211 until the cutter 5 falls down to the sliding guide block 207 on the lower end surface 203, at which time the adjusting push rod 105 is located on the left side of the cutter 5;

for the tool clamping plates, the first tool clamping plate 9 fixedly connected with the clamping frame 101 continues to move leftwards until the clamping frame 101 stops moving, and the second tool clamping plate 10 fixedly connected with the frame body 201 keeps still because the frame body 201 is limited to move, so that the distance between the first tool clamping plate 9 and the second tool clamping plate 10 is enlarged, and old tools originally clamped between the first tool clamping plate 9 and the second tool clamping plate 10 are separated from the constraint and fall down, thereby completing the tool retracting operation of the tool clamping plates.

Further, the driving device 4 drives the shaft sliding plate 801 to move in a direction away from the push plate 7 (i.e. move to the right) by the reverse servo motor 401, at this time, in order to keep the sliding guide device 2 relatively still, a pressure spring counter bore 213 is disposed on a side of the transverse sliding block 210 away from the push rod 7, the pressure spring counter bore 213 and the push rod counter bore 212 are not communicated with each other, and preferably are coaxially disposed therebetween, so as to ensure stability of the transverse sliding block 210 in the sliding process, an adjusting seat 107 is disposed at a cantilever end of the sliding edge 102 of the clamping frame 101, as shown in fig. 7, the adjusting seat 107 is slidably connected with an inner side surface of the cantilever end of the sliding edge 102, specifically, the adjusting seat 107 may be of a rectangular parallelepiped structure, a sliding block is disposed on a surface of the adjusting seat 107 which is attached to the inner side surface of the cantilever end of the sliding edge 102, a, the inner side surface of the cantilever end of the sliding edge 102 is provided with a square groove 108 for sliding of the sliding block, the adjusting seat 107 is slidably connected with the sliding edge 102 through sliding matching of the sliding block and the square groove, the number of the square grooves 108 can be one, or multiple, as shown in fig. 7, the upper and lower sides of the sliding guide device sliding groove 103 in the sliding edge 102 are provided with the square grooves 108, the square groove 108 is internally provided with a square limiting block (not marked in the figure), and the position and sliding of the adjusting seat 107 on the square groove are limited by the matching effect of the square limiting block and a screw on the adjusting seat 107. Furthermore, a pressure spring counter bore 109 is also arranged on one side of the adjusting seat 107 opposite to the transverse sliding block 201, the pressure spring counter bore 109 and the pressure spring counter bore 213 are coaxially arranged, two ends of the pressure spring 3 respectively extend into the pressure spring counter bore 109 and the pressure spring counter bore 213, the initial compression amount of the pressure spring 3 is adjusted by controlling the distance between the adjusting seat 107 and the transverse sliding block 210, so that the sliding guide device 2 has a tendency of sliding towards the connecting edge 106 of the clamping frame 101 in an initial state, initial pre-tightening force is further given to the first tool clamping plate 9 and the second tool clamping plate 10 respectively located at the lower portions of the clamping frame 101 and the frame body 201, the tool clamping plates can be guaranteed to tightly clamp the tool 5, and therefore the tool 5 is guaranteed not to shift or loosen during normal work, and the working stability of the tool. Further, due to the existence of the pressure spring 3, when the tool box 11 and the clamping device 1 move leftwards and the sliding guide device 2 is limited by the push rod 12 and is relatively immobile, the pressure spring 3 is compressed to store elastic energy, and when the tool box 11 and the clamping device 1 move rightwards, the pressure spring 3 releases elastic potential energy to enable the sliding guide device 2 to receive leftwards elastic force, so that the sliding guide device 2 cannot move rightwards together with the tool box 11 and the clamping device 1 to keep the position of the sliding guide device relatively immobile, at the moment:

as for the tool magazine 11, the tools 5 at the lower portion of the tool magazine 11 slide rightward along the slide guide block 207 of the upper end face of the frame body 201 and away from the first tool through-hole 204, thereby completing the feeding of new tools 5;

for the clamping frame 101, the adjusting push rod 105 inside the sliding edge 102 of the clamping frame 101 moves rightwards along the side channel 211, and the new cutter 5 slides rightwards along the sliding guide block 207 on the lower end surface 203 under the push of the adjusting push rod 105 due to the sliding fit of the new cutter 5 and the sliding guide block 207 on the lower end surface 203 until the new cutter 5 slides to the position of the second cutter through hole 205 and falls;

for the tool clamping plates, the first tool clamping plate 9 fixedly connected with the clamping frame 101 moves rightwards, and is kept still as the frame body 201 continues to be limited to move, so that the distance between the first tool clamping plate 9 and the second tool clamping plate 10 is gradually reduced, and the new tool 5 falling through the second tool through hole 205 falls between the first tool clamping plate 9 and the second tool clamping plate 10 and is bound, and the new tool 5 is tightly clamped by the tool clamping plates along with the continuous movement of the first tool clamping plate 9, thereby completing the operation of installing the new tool by the tool clamping plates.

Further, when the sliding guide device 2 and the knife box 11 and the clamping device 1 are displaced relatively, in order to control the relative displacement between each other, so that the external control device can automatically control the movement of the knife box 11, the clamping device 1 and the sliding guide device 2, a straight handle limit switch 110 is arranged above a pressure spring counter bore 109 of the adjusting seat 107, as shown in fig. 7, when the clamping device 1 moves leftwards relative to the sliding guide device 2, the distance between the adjusting seat 107 and a frame body 201 of the sliding guide device 2 is continuously reduced until contact is generated to trigger the straight handle limit switch 110 arranged on the adjusting seat 107, after the straight handle limit switch 110 is triggered, a signal is generated by a signal generator and transmitted to an external control system by a signal transmission line (namely, a traditional contact control system is adopted), and the external control system generates a feedback signal after receiving the signal, the magazine 11 and the holding device 1 are stopped from moving leftward while transmitting a signal to the servo motor 401 to reverse the servo motor 401, and the magazine 11 and the holding device 1 are reversed and moved rightward, but the conventional contact control system described above is not used for controlling the relative displacement therebetween, and the problem can be solved by the conventional infrared control system as long as the problem can be solved.

The utility model discloses a 3D printing apparatus is with automatic cutter device that changes, its theory of operation process is roughly: before the 3D printer starts to operate, the cutters 5 are sequentially arranged in the cutter box 11, the lower dovetail-shaped guide rail 1105 of the cutter box 11 is matched with the cutter box sliding groove 104 on the upper end surface of the sliding edge 102 of the clamping device 1 through the handle 1102 on the cutter box 11 and pushed to a set position, the cutter box 11 is fixed through the dovetail-shaped limiting block 111, the short cross handle 1103 is screwed out, the bottom of the cutter box 11 is smooth, the bottom of the new cutter 5 is contacted with the sliding guide block 207 on the upper end surface 202 of the clamping device 1, after the atmosphere environment in the cabin is built, the normal printing process is carried out, the transverse stroke range is between the powder supply port, the molding port and the powder collection port, when the machine judges that the old cutter needs to be replaced, when the machine finishes laying powder leftwards and returning to the right under the action of a transverse movement module, the powder supply port and the old scraper collection port sequentially pass through the molding port, and after the positioning is reached, the push rod 7 acts on the left counter bore 212 of the transverse sliding block 210 through the clamping, the clamping device 1 and the knife box 11 move left continuously, the compression spring 3 in the initial compression state is further compressed, wherein the initial compression state can be adjusted by the adjusting seat 107, the compression state is required to ensure that the scraper does not deviate during normal operation, at the moment, the first knife clamping plate 9 and the second knife clamping plate 10 are gradually separated, the old scraper can easily fall into a scraper collecting port due to the special section design, as shown in fig. 13, the clamping device 1 and the knife box 11 move left continuously until the straight shank limit switch 110 stops moving when being triggered, at the moment, the first knife through hole 204 of the sliding guide device 2 is communicated with the knife box 11, the new knife 5 falls into the hollow cavity of the frame body 201, the chute part 501 of the new knife 5 is just matched with the pair of sliding guide blocks 207 on the lower end surface 203, and after the straight shank limit switch 110 is triggered, a signal is returned to the control end of the servo motor 401, the servo motor 401 rotates reversely, the clamping device 1 and the knife box 11 move rightwards together under the driving of the driving device, at this time, the compression spring 3 starts to gradually release deformation energy to push the sliding guide device 2 to move leftwards relatively, but due to the limiting effect of the adjusting push rod 105, the new knife 5 falling into the hollow cavity of the frame body 201 cannot move leftwards together, under the pushing of the adjusting push rod 105, the new knife 5 falls between the first knife clamp plate 9 and the second knife clamp plate 10, as shown in fig. 14, at this time, the push rod 7 does not completely withdraw, when the clamping device 1 and the knife box 11 continue to move rightwards, finally, the first knife clamp plate 9 and the second knife clamp plate 10 completely clamp the new knife 5, the compression spring 3 returns to the initial compression state, the main body device continues to move rightwards, and sequentially passes through the powder supply port and the forming port, and the first printing after the new knife 5 is replaced is started.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An automatic cutter replacing device for a 3D printing device comprises a clamping device and a cutter clamping plate, and is characterized in that the clamping device is arranged in a printing cabin and provides moving power through a driving device, the clamping device comprises a clamping frame with a frame structure, the upper portion of the clamping frame is fixedly connected with a cutter box for providing a cutter, a sliding guide device is arranged in the clamping frame, the sliding guide device comprises a frame body with a hollow structure, the outer side edge of the frame body is in sliding connection with the inner side edge of the clamping frame, cutter through holes communicated with the hollow structure are formed in the upper end face and the lower end face of the frame body, the cutter through holes are not located in the middle of the end face of the frame body and are arranged in a staggered mode, an adjusting push rod is arranged in the hollow structure of the frame body and is fixedly connected with the clamping frame, the cutter in the cutter box enters the hollow structure of the frame body through the cutter through hole in the upper end face of the frame body, under the pushing of the adjusting push rod, the cutter in the hollow structure of the frame body is pushed to the cutter through hole in the lower end face of the frame body and then leaves the frame body, the cutter clamping plates are respectively fixed at the bottoms of the clamping frame and the frame body, when the clamping frame and the frame body are relatively displaced, the cutter clamping plates are loosened or clamped, and the cutter coming out of the frame body directly falls to the cutter clamping plates and is clamped.

2. The automatic cutter replacing device for the 3D printing equipment according to claim 1, wherein a sliding guide structure is provided on the end surface of the frame body having the cutter through hole, and the cutter slides to the cutter through hole through the sliding guide structure until passing through the cutter through hole.

3. The automatic cutter replacing device for the 3D printing equipment as claimed in claim 2, wherein the side surface of the frame body is open to form a side through hole, a transverse sliding block is fixedly connected to the side through hole and protrudes out of the frame body, the frame body is in sliding fit with the side edge of the clamping frame through the transverse sliding block, a space is left between the transverse sliding block and the top of the side through hole to form a side channel, and the adjusting push rod penetrates through the side channel and can freely slide along the direction of the side channel.

4. The automatic cutter replacing device for the 3D printing equipment as claimed in claim 3, wherein the inner wall of the printing cabin is provided with a push rod, one end of the push rod is fixedly connected with the printing cabin, the other end of the push rod can penetrate through the clamping frame and is matched with the transverse sliding block, the length direction of the push rod is parallel to the moving direction of the clamping frame, when the clamping frame drives the frame body to move towards the push rod together, the push rod penetrates through the clamping frame and is matched with the transverse sliding block on the frame body in a contact manner, when the clamping frame continues to move towards the push rod, the frame body is limited by the push rod and does not move any more, and therefore the relative displacement is generated between the clamping frame and the.

5. The automatic cutter replacing device for the 3D printing equipment according to claim 4, wherein the side edge of the clamping frame in sliding connection with the frame body is a sliding edge, one end of the sliding edge far away from the push rod is in sliding connection with an adjusting seat, the adjusting seat is opposite to the transverse sliding block, a pressure spring is arranged between the adjusting seat and the transverse sliding block, two ends of the pressure spring are respectively embedded into the adjusting seat and the transverse sliding block, the pressure spring has an initial compression amount, so that thrust exists between the transverse sliding block and the adjusting seat, and when the push rod is in contact fit with the transverse sliding block and the clamping frame continues to move towards the push rod, the pressure spring is compressed.

6. The automatic cutter replacing device for the 3D printing equipment according to claim 2, wherein the sliding guide structure of the lower end face of the frame body is located in the frame body and is located right below the through hole of the cutter on the upper end face of the frame body, the sliding guide structure comprises a plurality of sliding guide blocks, the sliding guide blocks jointly form the sliding guide structure, the sliding guide blocks are fixedly connected with the frame body, and the sliding guide blocks are matched with the sliding grooves at the bottom of the cutter, so that the cutter can slide towards the through hole of the cutter along the sliding guide blocks.

7. The automatic cutter replacing device for the 3D printing apparatus according to claim 6, wherein one end of the slide guide block extends above the cutter through hole so that the one end of the slide guide block overhangs the cutter through hole to form a tip guide portion, and when the cutter slides along the slide guide block to the tip guide portion, the cutter can pass through the cutter through hole without deflection at an instant of leaving the tip guide portion.

8. The automatic tool changing device for the 3D printing equipment according to claim 6, wherein a guide rail is arranged in the printing cabin, the clamping device is in transmission connection with a driving device through a connecting structure, and the driving device drives the clamping device to move along the guide rail in the printing cabin.

9. The automatic tool changer for 3D printing apparatus according to claim 8, wherein the driving device includes a servo motor, the servo motor is connected to the screw through a shaft coupling, the guide rail is disposed on both sides of the screw and parallel to the screw, the screw is fixed on one side of the printing chamber through a bearing support, a screw nut is sleeved on the screw, the screw nut is fixedly connected to the nut support, a shaft sliding plate is fixedly connected to one side of the nut support, the shaft sliding plate spans between the guide rails and is slidably connected to the guide rails through guide rail sliding blocks, one side of the shaft sliding plate away from the guide rails is fixedly connected to the side of the clamping device through clamping device connecting plates, and the servo motor drives the shaft sliding plate to slide along the guide rails through the screw, thereby driving the clamping device to move.

10. The automatic cutter replacing device for the 3D printing equipment according to claim 5, wherein a straight handle limit switch is arranged on the surface of the adjusting seat opposite to the frame body, the straight handle limit switch is connected with an external control system through a signal generator and a signal transmission line and realizes signal transmission, and when the frame body is in contact with the straight handle limit switch, the straight handle limit switch transmits a signal to the external control system through the signal generator.

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