CN214447143U - Adjustable assembled scraper assembly for additive manufacturing - Google Patents

Abstract

The utility model relates to a vibration material disk field discloses an adjustable assembled scraper assembly for vibration material disk. The scraper assembly comprises a scraper component and a mounting seat, the mounting seat and the scraper component are inserted into a positioning hole through a positioning pin in a rotating fit mode, the scraper component is provided with a stress plate, the upper surface and the lower surface of the mounting seat, corresponding to the stress plate, are respectively provided with an adjusting threaded hole and an elastic part, an adjusting threaded rod is arranged in the adjusting threaded hole, the elastic part is abutted to the stress plate, and the stress plate and the positioning pin are staggered mutually. Adopt the utility model discloses a atress is even when scraper assembly adjustment scraper can make the scraper installation, and residual stress is not improved and is spread the powder quality, extension scraper life, and high unevenness problem when solving and spread the powder has reduced because the base plate is uneven time and the cost of changing the base plate and regrinding the base plate, improves base plate fault-tolerant rate and production efficiency, reduction in production cost.

Description

Adjustable assembled scraper assembly for additive manufacturing

Technical Field

The utility model relates to a vibration material disk field specifically is an adjustable assembled scraper anchor clamps and scraper assembly.

Background

Due to the rapid development of the additive manufacturing technology, the additive manufacturing technology plays a significant role in the current manufacturing industry, the production efficiency and the forming quality of parts directly depend on the powder laying quality of additive manufacturing equipment, and the most critical influencing the powder laying quality is a scraper and a scraper clamp, most of the current additive manufacturing equipment does not have the function of adjusting the levelness of the scraper, and the scraper clamp is integral, so that the following adverse effects can be caused:

1. the part has inconsistent forming height and even leads to forming failure

When the part is formed by the additive manufacturing technology, powder materials are required to be uniformly and uniformly paved on a forming platform in the first step, if the first layer of powder is not uniformly paved, the Z-axis height of the part formed at the position where the powder is too thin is reduced, the Z-axis height of the part formed at the position where the powder is too thick is increased, and the laser cannot be penetrated by the too thick powder layer, so that the part cannot be bonded with a substrate, and finally the part is failed to be formed;

2. poor powder laying quality influences part forming quality

The integral scraper clamp of the current market equipment can only hold one end of a scraper and drag the end from one end of a clamp notch to the other end when the scraper is installed, the scraper is obviously deformed when dragged due to the small size of the notch of the scraper, the lower edge of the scraper is uneven, a formed part has obvious equidirectional stripes, the service life of the scraper is obviously shortened, the scraper and the clamp are not firmly attached due to the large size of the notch of the scraper, and the scraper and the notch slide relatively in the powder spreading process, so that the powder spreading defect finally causes the part forming failure;

3. the fault tolerance rate of the substrate is low, the labor cost is wasted, and the production efficiency is influenced

Part vibration material disk equipment can not adjust the base plate height neither can adjust the scraper height, often can change the base plate back and forth because certain one side of shaping base plate is lower or higher in the production process, has not only reduced production efficiency, still because of the base plate need grind the labour cost that increases again.

The patent application with publication number CN210940474U discloses an adjustable composite flexible powder spreading device, which is a composite powder spreading device comprising a flexible strip assembly and a scraper assembly, wherein the top of the flexible strip assembly and the scraper assembly are provided with an adjusting through groove, the scraper assembly and the powder spreading assembly are respectively arranged in a first connecting through groove and a second connecting through groove of a powder spreading arm, an adjusting bolt is connected in the adjusting through groove and is overlapped at the top of the first connecting through groove and the second connecting through groove, the levelness of the flexible strip assembly and the scraper assembly can be adjusted by rotating the adjusting bolt, the adjusting mode mainly depends on the adjusting bolt overlapped at the top of the connecting through groove to adjust the levelness, but because the adjusting bolt adopts the overlapping mode, the upper part and the lower part of the adjusting bolt are not stable, when the scraper assembly is subjected to an upward acting force, the scraper assembly can move upwards and can not be directly used for spreading powder, therefore, the scraper component and the flexible strip component are tightly ejected from the first ejecting threaded through hole and the second ejecting threaded hole of the side walls of the first connecting through groove and the second connecting through groove by bolts, and the scraper component and the flexible strip component are fixed in position. Although the fixed problem of scraper has been solved like this, nevertheless do not exclude when utilizing the bolt to push up tight scraper subassembly, slight removal appears in the scraper, lead to position control to the deviation appears to the scraper subassembly relies on the bolt of side to push up tightly fixedly in the use, and the stability of this kind of side fixed mode is relatively poor, takes place to remove very easily.

Patent application with publication number CN208497687U discloses a coating scraper accurate adjustment device of vibration material disk rapid prototyping equipment, is connected scraper body and benchmark crossbeam through ball stud in the middle of it, and the bulb of ball stud cooperatees with the sphere recess of scraper body, makes the scraper body rotate around the bulb, is favorable to the levelness regulation of scraper both sides, and the scraper both sides are through the ball end top adjusting screw realization horizontal adjustment, lock fixedly through locking screw. This patent application is higher for the regulation stability of the patent application that the aforesaid was mentioned, but actually adjust the back through ball end top adjusting screw, the relative position that locking screw and the locking screw hole that corresponds on the scraper body take one's place and change, hardly guarantee that locking screw can smoothly screw in locking screw hole and screw in back scraper position appearance and do not change, therefore, this patent application adjustment range is extremely limited, only can realize very slight adjustment, only be applicable to usually in the photocuring shaping with the scraper accurate adjustment of horizontal state, make it parallel with the liquid level, and difficult to apply to adjusting the scraper to and parallel with oblique base plate in the vibration material disk manufacturing such as laser election district melts. In addition, the structure is relatively complex, and particularly the related structure of the ball stud in the middle has relatively complex process difficulty in both manufacturing and assembling.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an adjustable assembled scraper assembly for vibration material disk is provided, the adjustment scraper levelness of being convenient for improves the convenience and the stability of scraper installation simultaneously.

The utility model discloses an adjustable assembled scraper assembly for vibration material disk, including scraper subassembly and mount pad, be provided with corresponding locating pin and locating hole on mount pad and the scraper subassembly respectively, mount pad and scraper subassembly pass through the locating pin and insert locating hole normal running fit, the scraper subassembly is provided with the atress board, the upper and lower two sides that the mount pad corresponds the atress board are provided with adjusting screw hole and elastic component respectively, the threaded adjusting rod that is provided with in the adjusting screw hole, the elastic component supports and leans on the atress board, the position of atress board and locating pin staggers each other.

Preferably, the installation seat and the scraper assembly are respectively provided with a long hole and a fixing stud, the long holes are arranged along the adjustment direction of the scraper assembly, and the fixing studs penetrate through long hole matching nuts to connect the installation seat with the scraper assembly.

Preferably, the mount pad is provided with the scale cylinder, adjust the screw hole and set up in the scale cylinder along the axial, scale cylinder outer wall is provided with first scale along the axial, adjusting threaded rod is provided with the scale cap, the scale cap suit is on the scale cylinder, the outer wall of scale cap is provided with the second scale along circumference.

Preferably, the elastic member is a spring, a spring mounting groove is formed in the mounting seat corresponding to the position of the elastic member, and the spring is arranged in the spring mounting groove.

Preferably, the side wall of the adjusting threaded hole is provided with a through locking threaded hole, and a locking screw for locking the adjusting threaded rod is arranged in the locking threaded hole.

Preferably, the adjusting threaded hole and the adjusting threaded rod are located above the stress plate, and the elastic piece is located below the stress plate.

Preferably, the doctor assembly comprises a first clamping plate, a second clamping plate and a doctor body clamped between the first clamping plate and the second clamping plate.

Preferably, the first clamping plate and the second clamping plate are connected through a countersunk bolt and a countersunk bolt hole, and the countersunk side of the countersunk bolt hole is located on the side of the scraper assembly corresponding to the mounting seat.

Preferably, the doctor assembly is a doctor body.

Preferably, the positioning pin is arranged in the middle of the mounting seat, and the stress plate is arranged at the end part of the scraper component.

The utility model has the advantages that:

1. the middle part of the scraper assembly is positioned by the positioning pin and rotates, so that the structure is simpler under the condition of ensuring the adjusting function of the scraper assembly;

2. the adjustment is realized by matching the elastic piece with the adjusting threaded rod, the stability in the adjusting process is higher, and the adjusting operation is more convenient.

3. Adopt the utility model discloses a atress is even when scraper assembly adjustment scraper can make the scraper installation, and residual stress is not improved and is spread the powder quality, extension scraper life, and high unevenness problem when solving and spread powder or coating has reduced because the base plate is uneven and change the time and the cost of base plate and regrinding, improves base plate fault-tolerant rate and production efficiency, reduction in production cost.

4. The laser selective melting and sintering device has high adjustment accuracy and a relatively large adjustment range, the adjustment height can reach more than +/-1 mm in a horizontal state, and the laser selective melting and sintering device can be applied to additive manufacturing such as laser selective melting, laser selective sintering, photocuring and the like.

Drawings

Fig. 1 is a schematic perspective view of a doctor assembly of the present invention;

figure 2 is an exploded view of the present doctor assembly;

FIG. 3 is a partial schematic view of an adjustment mechanism;

FIG. 4 is a front view of the mount;

FIG. 5 is a top view of the mount;

FIG. 6 is a front view of the doctor assembly;

figure 7 is a top view of the doctor assembly.

Reference numerals: countersunk bolt 1, first clamp plate 2, second clamp plate 3, mount pad 4, nut 5, locating pin 6, scraper assembly mounting hole 7, fixing stud 8, adjusting threaded rod 9, scale cylinder 10, locking screw 11, spring mounting groove 12, spring 13, stress plate 14, scraper body 15, slot hole 16, countersunk bolt hole 17, locating hole 18.

Detailed Description

The present invention will be further explained below.

As shown in fig. 1 and 2, the utility model discloses an adjustable assembled scraper assembly for vibration material disk, including scraper subassembly and mount pad 4, be provided with corresponding locating pin 6 and locating hole 18 on mount pad 4 and the scraper subassembly respectively, mount pad 4 and scraper subassembly pass through locating pin 6 and insert 18 normal running fit in locating hole, the scraper subassembly be provided with atress board 14, the upper and lower two sides that mount pad 4 corresponds atress board 14 are provided with adjusting screw hole and elastic component respectively, adjusting screw is threaded the downthehole adjusting threaded rod 9 that is provided with, the elastic component supports and leans on atress board 14, atress board 14 staggers each other with locating pin 6's position.

The blade assembly may be a blade body 15 or a combination of a blade body 15 and a blade holder. The positioning pin 6 may be disposed on the scraper assembly or on the mounting seat 4, if the positioning pin 6 is located on the scraper assembly, the positioning hole 18 is correspondingly disposed on the mounting seat 4, and if the positioning pin 6 is disposed on the mounting seat 4, the positioning hole 18 is correspondingly disposed on the scraper assembly, the latter method is adopted in the embodiment shown in fig. 1, and the mounting seat 4 is further provided with a scraper assembly mounting hole 7 for mounting the scraper assembly on the additive manufacturing equipment. Adjusting threaded rod 9 on mount pad 4 cooperates with adjusting threaded hole, acts on stress plate 14 through rotating adjusting threaded rod 9, staggers each other because of stress plate 14 and locating pin 6's position, makes scraper subassembly rotatory around locating pin 6 under adjusting threaded rod 9's effect, and then realizes the regulation of scraper levelness. The elastic component is located adjusting threaded rod 9's offside, and its elasticity supports and leans on atress board 14, plays the effect of stabilizing atress board 14 and scraper, makes the scraper can not take place to rock at the accommodation process, guarantees the stability of adjusting. Although the adjustment of the levelness of the scraper can be realized by staggering the positions of the stress plate 14 and the positioning pin 6, considering that the adjustment needs high precision, the farther the stress plate 14 is from the positioning pin 6, the higher the adjustment precision is, the smaller the adjustment amplitude is, and at the same time, the scraper assembly can be adjusted in both the clockwise direction and the counterclockwise direction of the horizontal plane, in a preferred embodiment, as shown in fig. 4 and 5, the positioning pin 6 is arranged in the middle of the mounting seat 4, and the stress plate 14 is arranged at the end of the scraper assembly. Besides the single end is provided with the stress plate 14, the adjusting threaded rod 9 and other corresponding adjusting structures, the two ends can be provided with the stress plate 14, the adjusting threaded rod 9 and other corresponding adjusting structures.

In order to guarantee that the scraper does not move after being adjusted, the stability of combining of scraper component and mounting seat 4 is improved simultaneously, be provided with slot hole 16 and fixing stud 8 on mounting seat 4 and the scraper component respectively, slot hole 16 is arranged along scraper component adjustment direction, fixing stud 8 passes slot hole 16 cooperation nut 5 and is connected mounting seat 4 with the scraper component. The slot hole 16 specifically can adopt waist type hole, bar hole, arc hole, because the scraper is around locating pin 6 pivoted, the width in arc hole can just be unanimous with fixing stud 8's external diameter, but the centre of a circle in arc hole need be located locating pin 6, waist type hole and bar hole except having a fixed length degree, its width still need slightly be greater than fixing stud 8's external diameter to guarantee that fixing stud 8 can be in its smooth adjusting position. One of the fixing stud 8 and the long hole 16 is arranged on the mounting seat 4, the other is correspondingly arranged on the scraper component, and after the levelness of the scraper component is adjusted to the right position through the adjusting threaded rod 9, the nut 5 on the fixing stud 8 can be screwed down, so that the scraper component is ensured not to move any more. Preferably, the long holes 16 and the fixing studs 8 are arranged on both sides of the positioning pin 6, so as to further ensure the stability of the scraper component.

Present scraper levelness regulative mode can only rely on experience or tentative adjustment, and this can great improvement the degree of difficulty of adjustment undoubtedly, for realize the adjustment more easily accurately, as shown in fig. 3, the utility model discloses quantized the range of adjustment, the concrete mode is mount pad 4 sets up scale cylinder 10, adjusting screw hole sets up in scale cylinder 10 along the axial, 10 outer walls of scale cylinder are provided with first scale along the axial, adjusting screw 9 is provided with the scale cap, the scale cap suit is on scale cylinder 10, the outer wall of scale cap is provided with the second scale along circumference. The screw micrometer with large differential span in the field is taken into account in the adjustment quantification mode, the height adjusted on one side can be roughly read out through the position of the end face of the scale cap on the first scale, and the height adjusted on one side can be accurately read out by combining the position of the first scale corresponding to the second scale, so that the accurate quantification of the adjustment amplitude is realized.

The effect of elastic component utilizes its elasticity to stabilize scraper subassembly in the adjustment process, and the elastic component specifically can adopt flexure strip or spring 13 etc. if adopt spring 13, for its installation of convenience, the position that mount pad 4 corresponds the elastic component is provided with spring mounting groove 12, spring 13 sets up in spring mounting groove 12.

The threads have a certain self-locking function, so that the adjusting threaded rod 9 cannot move after being adjusted in place under normal conditions, but in order to further lock the adjusting threaded rod, a through locking threaded hole is formed in the side wall of the adjusting threaded hole, and a locking screw 11 used for locking the adjusting threaded rod 9 is arranged in the locking threaded hole. After the adjusting threaded rod 9 is adjusted in place, the locking screw 11 can be screwed down to abut against the adjusting threaded rod 9 to prevent the adjusting threaded rod from moving. In order to facilitate the manual tightening of the locking screw 11, a handle may be provided thereon.

Adjusting threaded rod 9 and elastic component divide and are in the upper and lower two sides of atress board 14, and both combined action stabilize atress board 14, no matter both are in atress board 14 upper surface respectively or following all, but if adjusting threaded rod 9 at mount pad 4 both ends is below atress board 14, not only be unfavorable for the operation, and under the condition that does not set up fixing stud 8, then the elastic component needs great elasticity just can offset the upward effort that the scraper during operation received, guarantees the stability of scraper work, therefore as preferred mode, adjusting threaded hole and adjusting threaded rod 9 are located the higher authority of atress board 14, the elastic component is located the below of atress board 14. The upward force of part of the doctor assembly is taken up by the adjusting screw 9.

As mentioned above, the scraper assembly may be the scraper body 15, or may be a combination of the scraper body 15 and a scraper fixture, for example, a light curing process, the scraper is made of a hard material, so a rotating structure may be directly disposed in the middle of the scraper body 15, and the stress plate 14 is disposed at both ends, and also a rigid scraper may be partially used in the laser selective melting process, or the scraper body 15 may be directly used as the above scraper assembly to be combined, but as shown in fig. 6 and 7, in the embodiment, a rubber scraper is used in the laser selective melting process, and cannot be directly matched with the mounting base 4, so the scraper assembly further includes the first clamping plate 2 and the second clamping plate 3 in addition to the scraper body 15, and the scraper body 15 is clamped between the first clamping plate 2 and the second clamping plate 3. The scraper body 15 can be installed in a clamping mode through the first clamping plate 2 and the second clamping plate 3, smoothness of the scraper body 15 can be guaranteed, and installation and replacement are convenient. The first clamping plate 2 and the second clamping plate 3 can be connected with each other by bolts, screws, bonding and the like to clamp the scraper body 15, but considering that the scraper assembly needs to be matched with the mounting seat 4, when the first clamping plate 2 and the second clamping plate 3 are connected by bolts, the first clamping plate preferably adopts the countersunk head bolt 1 and the countersunk head bolt hole 17 for connection, and the countersunk head side of the countersunk head bolt hole 17 is positioned at one side of the scraper assembly corresponding to the mounting seat 4, so that the bolt head of the countersunk head bolt 1 is positioned in the countersunk head bolt hole 17 and does not interfere with the mounting seat 4.

Claims (10)

1. A adjustable assembled scraper assembly for vibration material disk, its characterized in that, including scraper subassembly and mount pad (4), be provided with corresponding locating pin (6) and locating hole (18) on mount pad (4) and the scraper subassembly respectively, mount pad (4) and scraper subassembly pass through locating pin (6) and insert locating hole (18) normal running fit, the scraper subassembly is provided with atress board (14), the upper and lower two sides that mount pad (4) correspond atress board (14) are provided with adjusting screw hole and elastic component respectively, adjusting screw is threaded the downthehole adjusting threaded rod (9) that is provided with, the elastic component supports and leans on atress board (14), atress board (14) stagger each other with the position of locating pin (6).

2. The adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1, wherein: be provided with slot hole (16) and fixing stud (8) on mount pad (4) and the scraper subassembly respectively, slot hole (16) are arranged along scraper subassembly adjustment direction, fixing stud (8) pass slot hole (16) cooperation nut (5) and are connected mount pad (4) with the scraper subassembly.

3. The adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1, wherein: the mounting seat (4) is provided with a scale cylinder (10), the adjusting threaded hole is axially arranged in the scale cylinder (10), the outer wall of the scale cylinder (10) is axially provided with a first scale, the adjusting threaded rod (9) is provided with a scale cap, the scale cap is sleeved on the scale cylinder (10), and the outer wall of the scale cap is circumferentially provided with a second scale.

4. An adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1 or 3, wherein: the elastic piece is spring (13), the position that mount pad (4) corresponds the elastic piece is provided with spring mounting groove (12), spring (13) set up in spring mounting groove (12).

5. An adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1 or 3, wherein: the side wall of the adjusting threaded hole is provided with a through locking threaded hole, and a locking screw (11) used for locking the adjusting threaded rod (9) is arranged in the locking threaded hole.

6. The adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1, wherein: the adjusting threaded holes and the adjusting threaded rods (9) are located above the stress plate (14), and the elastic pieces are located below the stress plate (14).

7. The adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1, wherein: the scraper component comprises a first clamping plate (2), a second clamping plate (3) and a scraper body (15), wherein the scraper body (15) is clamped between the first clamping plate (2) and the second clamping plate (3).

8. The adjustable assembled doctor assembly for additive manufacturing as claimed in claim 7, wherein: first clamp plate (2) and second clamp plate (3) are connected through countersunk head bolt (1) and countersunk head bolt hole (17), the countersunk head side position of countersunk head bolt hole (17) is located scraper subassembly and mount pad (4) corresponding one side.

9. The adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1, wherein: the scraper component is a scraper body (15).

10. The adjustable assembled doctor assembly for additive manufacturing as claimed in claim 1, wherein: the positioning pin (6) is arranged in the middle of the mounting seat (4), and the stress plate (14) is arranged at the end part of the scraper component.

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