CN116851818A - Milling cutter for forming external corners of PVC (polyvinyl chloride) veneer - Google Patents

Abstract

The application relates to the technical field of assembly type decoration, in particular to a milling cutter for forming external corners of a PVC (polyvinyl chloride) veneer. The tool comprises a tool bit and a tool handle, wherein the tool bit comprises a connecting surface forming part and a bending groove forming part; the connecting surface forming part comprises a connecting surface forming side surface, and an angle alpha is clamped between the connecting surface forming side surface and the radial direction of the cutter handle, wherein alpha is smaller than 90 degrees; the bending groove forming part comprises a groove wall forming side face, and a beta angle is formed between the groove wall forming side face and the radial direction of the cutter handle, wherein alpha is more than beta and less than or equal to 90 degrees. The side surface of the cutter head is adjusted to be a bending surface, a bending groove forming part far away from the cutter handle is used for milling a bending groove convenient to bend, and a connecting surface forming part near to the cutter handle is used for milling a connecting surface continuous with the groove wall of the bending groove; the inclination of the connecting surface forming part is controlled to be smaller than that of the bending groove forming part, so that the inclination of the connecting surface is smaller than that of the wall of the bending groove, and further, when the plate is bent and the bending groove is deformed, the two opposite connecting surfaces can be propped against each other.

Description

Milling cutter for forming external corners of PVC (polyvinyl chloride) veneer

Technical Field

The application relates to the technical field of assembly type decoration, in particular to a milling cutter for forming external corners of a PVC (polyvinyl chloride) veneer.

Background

Along with the standard export of the domestic assembled building and the popularization of the assembled decoration, the assembled decoration becomes the trend of the whole decoration industry, and the traditional wall facing emulsion paint or wallpaper technology has the problems of complex working procedures, long construction period, easy mildew and difficult cleaning, and the assembled wall facing wallboard becomes a facing decoration main stream decoration scheme. In the application process of the assembled wall facing wall board, the corner position of the wall is frequently encountered, but the prior A-level fireproof inorganic wall board mainly comprises a calcium silicate board and a magnesium oxysulfide base board, and the facing material adopts the processes of PVC film coating and the like; the wall calcium silicate board and the magnesium oxysulfate base material board belong to hard brittle materials, cannot be directly bent, meanwhile, the PVC film on the surface is thinner, and the direct bending treatment damages the facing, so that the facing Leng Yi is cracked and whitened, therefore, the board needs to be bent after being treated, generally, a groove is milled on the non-decorative surface of the board, then the groove is taken as the center, the board is bent into a right-angle shape and fixed, the external corner fitting is obtained, and meanwhile, the facing of the board is rounded.

A method for manufacturing a fireproof inorganic facing board disclosed in patent document with publication number CN112248592a, for example, comprises the following steps: milling a trapezoid groove on the base plate by using a V-shaped milling cutter along the thickness direction of the base plate, wherein the opening angle of the trapezoid groove is 105-120 degrees, the opening direction of the trapezoid groove is far away from the aluminum skin layer, the central axis of the trapezoid groove is perpendicular to the aluminum skin layer, the height of the trapezoid groove is the same as the thickness direction of the base plate, and the extension direction of the trapezoid groove is a straight line direction perpendicular to the section of the plate; bending the plate to one side of the base plate at the center of the upper bottom of the trapezoid groove by adopting a guiding rule until the plate is attached to the assembled external corner; glue is adhered in the bent trapezoid groove, so that the base layer plate at the bent position is firmly adhered.

It can be seen that the grooves are usually obtained by milling, and that the shape of the milling cutter head influences the shape of the grooves and thus also has a great influence on the positive corner forming effect. For example, in the application, the milled trapezoid groove is large in hollow, so that a large amount of glue is needed for fixing and avoiding external corner collapse; moreover, after bending, the trapezoid groove cannot form a closed hole, and the fixing after bending depends on the connection between the glue and the groove wall and the connection between the glue and the glue, but the glue is filled in the unsealed groove, so that the problems of incomplete filling of the glue in the groove, easy overflow of the glue and the like are caused, and the filling and fixing effects are affected.

Disclosure of Invention

The application aims to solve the problems and provides a milling cutter for forming the external corners of a PVC veneer.

The technical scheme of the application for solving the problem is that the milling cutter for forming the external corner of the PVC veneer comprises a cutter head and a cutter handle, wherein the cutter head comprises a connecting surface forming part connected with the cutter handle and a bending groove forming part connected with the connecting surface forming part; the connecting surface forming part comprises a connecting surface forming side surface, and an angle alpha is clamped between the connecting surface forming side surface and the radial direction of the cutter handle, wherein alpha is smaller than 90 degrees; the bending groove forming part comprises a groove wall forming side face, and a beta angle is formed between the groove wall forming side face and the radial direction of the cutter handle, wherein alpha is more than beta and less than or equal to 90 degrees.

Preferably, α is 45 °.

Preferably, the bending groove forming part further comprises a groove bottom forming top surface, and an obtuse angle is formed between the groove bottom forming top surface and the groove wall forming side surface.

Preferably, a rounded corner is provided between the groove bottom forming top surface and the groove wall forming side surface.

Preferably, the bottom forming top surface of the groove is a convex cambered surface protruding towards a direction away from the cutter handle.

Preferably, a round angle is arranged between the groove wall forming side surface and the connecting surface forming side surface.

Preferably, the connecting surface forming part comprises a first central shaft overlapped with the central shaft of the tool handle, and a plurality of first blades annularly and uniformly arranged on the first central shaft, and the cutting edge part of the first blades forms the connecting surface forming side surface; the bending groove forming part comprises a second central shaft overlapped with the central shaft of the cutter handle and a plurality of second blades which are annularly and uniformly arranged on the second central shaft, and the cutting edge part of each second blade forms the groove wall forming side face.

Preferably, the milling cutter further comprises a stop plate for limiting the depth of the milling groove, wherein the stop plate comprises a connecting part connected with the cutter handle and a stop part protruding out of the side edge of the forming part of the connecting surface.

Preferably, the cutter handle is provided with external threads, the connecting part is an internal threaded hole arranged in the center of the stop plate, and the connecting part is in threaded connection with the cutter handle.

Preferably, the knife handle is provided with scale marks along the axial direction of the knife handle.

The application has the beneficial effects that:

1. in the application, the structure of the milling cutter head is adjusted, the bending groove forming part far away from the cutter handle is used for milling a bending groove convenient to bend, and the connecting surface forming part near to the cutter handle is used for milling a connecting surface continuous with the groove wall of the bending groove; the inclination of the connecting surface forming part is controlled to be smaller than that of the bending groove forming part, so that the inclination of the connecting surface is smaller than that of the wall of the bending groove, and further, when the plate is bent and the bending groove is deformed, the two opposite connecting surfaces can be propped against each other. On the one hand, the opening of the bending groove is sealed by the propped connecting surface, so that the bending groove is bent into a sealed hole, glue is filled in the bending groove, glue overflow is avoided, and the combination effect of the glue and the groove wall is ensured. On the other hand, under the same milling depth, the volume of the bending groove is reduced by the abutted connecting surfaces, so that the glue filling amount can be reduced, the environmental protection performance is improved, and the fixing effect can be further improved through the fixing between the connecting surfaces.

2. In the application, in order to adapt to the situation of most right-angle external corners, the inclination of the forming part of the connecting surface is set to be 45 degrees, and the abutting area of the two connecting surfaces after bending is increased, so that the fixing effect is improved.

3. According to the application, the groove bottom forming top surface is additionally arranged to mill the U-shaped groove, compared with a V-shaped groove which is milled without the groove bottom forming top surface, the problems of stress concentration of the plate and cracking of the plate and the like caused by large mutation degree of the groove and the geometric shape of the plate can be relieved, more bending points can be provided for the plate through the larger bending groove bottom surface, and the bending deviation problem caused by groove deviation is relieved.

4. In the application, the rounded corner structures are arranged at the geometric abrupt change positions of the cutter head so as to relieve the stress concentration problem of the cutter head and the groove milled by the cutter head and reduce the occurrence rate of the plate cracking condition in the groove milling process.

5. According to the application, the adjustable stop plate is additionally arranged, the depth of the milling groove is controlled by abutting the stop plate with the plate, the influence of excessive depth of the milling groove on the strength of the plate is avoided, and the milling groove can also adapt to the milling groove work of plates with different thicknesses.

Drawings

FIG. 1 is a schematic view showing the structure of an example 1 of a milling cutter for forming external corners of PVC veneer;

FIG. 2 is a comparison of the use of the milling cutter of example 1 with the prior art milling cutter;

fig. 3 is a schematic perspective view of the milling cutter of embodiment 1;

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

FIG. 5 is a schematic view showing the structure of an example 2 of a milling cutter for forming external corners of PVC veneer;

FIG. 6 is a schematic view showing the structure of an example 3 of a milling cutter for forming external corners of PVC veneer;

in the figure: the tool bit 1, the connecting surface forming part 11, the connecting surface forming side surface 111, the bending groove forming part 12, the groove wall forming side surface 121, the groove bottom forming top surface 122, the tool shank 2 and the stop plate 3.

Detailed Description

The following is a specific embodiment of the present application, and the technical solution of the present application is further described with reference to the accompanying drawings, but the present application is not limited to these examples.

Example 1

A milling cutter for forming external corners of a PVC veneer is shown in figure 1 and comprises a cutter head 1 and a cutter handle 2. The tool shank 2 is of a columnar structure, one end of the tool shank 2 is connected with the tool bit 1, the other end of the tool shank can be connected with an output shaft of a motor, and the tool shank 2 is driven to rotate through rotation of the output shaft of the motor so as to drive the tool bit 1 to rotate for milling. The connection mode of the cutter handle 2 and the motor output shaft is not limited, and the milling cutter needs to rotate to work, so that the connection between the cutter handle 2 and the motor output shaft usually adopts a radial fixing structure, and the connection stability between the cutter handle 2 and the motor output shaft is prevented from being influenced by rotation. For example, a sleeve is arranged on the output shaft, the cutter handle 2 is inserted into the sleeve, meanwhile, an axial convex strip is arranged on the surface of the cutter handle 2, a strip groove for the axial convex strip to pass through is arranged on the inner wall of the sleeve, and the cutter handle 2 is limited to rotate in the sleeve through the cooperation of the convex strip and the groove; screw holes are respectively formed in the sleeve and the cutter handle 2, and after the cutter handle 2 is inserted into the sleeve, a screw sequentially penetrates through the two screw holes to realize fixation and rotation limitation; two structures may also be used in combination. The connection mode between the tool shank 2 and the tool bit 1 is not limited, and the tool bit 1 and the tool shank 2 are generally integrally formed for improving strength.

In the groove milling process, the tool bit 1 rotates by taking the tool shank 2 as a central shaft, and the top and the side surfaces of the tool bit 1 mill the plate, so that the shape of the milled groove is matched with the shape of the tool bit 1.

As shown in fig. 2 b and c, in the prior art, the side surface of the cutter head 1 is generally a smooth inclined surface, and the effect of bending by 90 ° after milling is different based on the inclination angle of the inclined surface. For example, in fig. b, the inclination angle is too small, the notch ends of the grooves are propped against each other after bending, and the contact between the angles is not easy to align due to small contact area, so that the bending accuracy is affected. In the graph c, the inclination angle is too large, the groove cannot be closed after the groove is bent for 90 degrees, and the groove is difficult to fill glue and fix. And the grooves milled by the two tool bits 1 are large in hollow, so that a large amount of glue is required to be filled, and the environmental protection of the plate is affected.

Therefore, in the present application, the side surface of the tool bit 1 is adjusted to be a curved surface, so as to solve the above-described problem. As shown in fig. 1 and a of fig. 2, the tool bit 1 includes a connection surface forming portion 11 connected with the tool shank 2 and a bending groove forming portion 12 connected with the connection surface forming portion 11, which are respectively used for milling connection surfaces and bending grooves on a plate, the side surface of the connection surface forming portion 11 is a connection surface forming side surface 111, the side surface of the bending groove forming portion 12 is a groove wall forming side surface 121, the connection surface forming side surface 111 and the groove wall forming side surface 121 together form a side surface of the tool bit 1, and the side surface of the tool bit 1 is made to be a bending surface based on different inclination angles of the connection surface forming side surface 111 and the groove wall forming side surface 121.

The inclination angle of the connection face forming side face 111 affects the inclination of the connection face milled on the plate, the inclination angle of the groove wall forming side face 121 affects the inclination of the groove wall of the bending groove milled on the plate, and the inclination angles of the connection face forming side face 111 and the groove wall forming side face 121 should be respectively limited to ensure the effect after bending. Specifically, as shown in fig. 1, an angle α is formed between the forming side 111 of the connecting surface and the radial direction of the shank 2, the angle α should be smaller than 90 °, preferably 45 °, when milling grooves, the shank 2 is generally perpendicular to the plate surface, the radial direction of the shank 2 is the plate surface direction, so that a connecting surface inclined by 45 ° is milled on the plate, when the plate is bent by 90 °, as shown in a diagram in fig. 2, the connecting surfaces inclined by 45 ° are just attached and abutted, at this time, fixation after bending of the plate can be realized by gluing between the connecting surfaces, compared with glue filling fixation in the prior art, the used glue amount is greatly reduced, and the bending alignment effect is improved by the offset between the surfaces. The angle beta is formed between the groove wall forming side 121 and the radial direction of the tool handle 2, and the angle beta is larger than the angle alpha, so that when the connecting surfaces are propped against each other after bending, the groove walls of the bending groove cannot be propped against each other, thereby forming a hole for filling glue to support the right-angle external corner structure and strengthen fixation. As can be seen from a comparison of fig. 2a, b and c, the volume of the hole is greatly reduced compared with the prior art, and the hole is a closed hole, so that the adhesive is not easy to overflow during filling, and contact connection between the adhesive and the groove wall is ensured. Of course, the angle β should not be too large, and should be smaller than or equal to 90 °, and when it exceeds 90 °, the upper end side edge of the bending groove forming portion 12 will contact the plate material first to mill the plate material compared with the groove wall forming side surface 121, and during the milling process, the groove wall forming side surface 121 cannot contact the plate material any more, and the function of the groove wall forming side surface 121 is lost.

In order to achieve the above-mentioned angle setting, in this embodiment, the whole connecting surface forming portion 11 is a truncated cone, specifically, as shown in fig. 3, the connecting surface forming portion 11 includes a first central shaft overlapping with the central shaft of the tool shank 2, and a plurality of first blades annularly and uniformly arranged on the first central shaft, the blade edge portions of the first blades form a connecting surface forming side 111, the corresponding angle α can be obtained by adjusting the shape of the first blades, the first blades can be fixedly connected with the first central shaft, and also can be detachably connected, the detachable connection mode is not limited, for example, a slot with a T-shaped section along the axial direction can be arranged on the first central shaft, and the opposite side ends of the first blades and the blade edge portions are provided with T-shaped blocks for sliding insertion into the slot. The whole bending groove forming part 12 can be in a cylindrical shape, a round table shape or a conical shape, and in this embodiment, a cylindrical shape is adopted, specifically, as shown in fig. 3, the bending groove forming part 12 includes a second central axis overlapping with the central axis of the tool shank 2, and a plurality of second blades annularly and uniformly arranged on the second central axis, and the blade edge part of the second blades forms a groove wall forming side 121, and similarly, the beta angle is obtained by adjusting the shape of the second blades.

Theoretically, the whole bending groove forming part 12 can be in a cylindrical shape, a round table shape or a conical shape, if the whole bending groove forming part 12 is in a conical shape, a V-shaped bending groove can be milled, and the advantages are that: when the plate is bent after milling the bending groove, the center of the bottom of the bending groove is taken as the center, the smaller the area of the bottom of the bending groove is, the easier the center of the bending groove is found, the center of the V-shaped bending groove is very easy to find, but the fact that the bending state of the plate is fixed once the milling groove is completed means that the plate is fixed, if the position deviation of the milling groove occurs, the scrapping problem of the plate is caused, and the sharp structure is easy to influence the balance of the response force and the cracking of the plate. Therefore, as shown in fig. 1, it is considered that the bending groove forming portion 12 further includes a groove bottom forming top surface 122, and an obtuse angle is formed between the groove bottom forming top surface 122 and the groove wall forming side surface 121, that is, the bending groove forming portion 12 is generally in a cylindrical shape or a circular truncated cone shape, and in this embodiment, a cylindrical shape is used, that is, the angle β is 90 °. When the prior art tool bit 1 adopts a smooth inclined side structure, the groove bottom forming top surface 122 with a certain area is disadvantageous because the two ends of the groove opening milled by the tool bit 1 are not aligned well, and if the groove milling position is accurate, the groove milling position is easy to bend and deviate. However, in the bent side structure of the present application, the groove bottom forming top surface 122 with a certain area can play a regulating role when the connecting surface is formed, because the area of the connecting surface is relatively large, even if the bending point is changed, the connecting surface is aligned in a dislocation manner, and the connecting surface can still be aligned and fixed.

The shape of the groove bottom forming top surface 122 is not limited, and the groove bottom forming top surface is set to be a convex arc surface protruding towards a direction away from the tool handle 2, so that the groove bottom of the milled bending groove is arc-shaped, the arc-shaped bending groove is easier to bend compared with the plane shape, and the cracking condition of the plate during bending is improved.

In addition, in order to further improve the stress situation, as shown in fig. 4, in this embodiment, a rounded corner is provided between the groove bottom forming top surface 122 and the groove wall forming side surface 121, and a rounded corner is provided between the groove wall forming side surface 121 and the connecting surface forming side surface 111. The fillet structures are arranged at the abrupt change positions of the geometric shapes of the cutter head 1 to relieve the stress concentration problem of the cutter head 1 and the grooves milled by the cutter head 1, so that the occurrence rate of the plate cracking condition in the groove milling process is reduced.

Example 2

This embodiment is substantially the same as embodiment 1, except that:

as shown in fig. 5, in the present embodiment, the angle of the angle β is smaller than 90 °; the groove bottom shaped top surface 122 is planar. The volume of the bending groove precipitated by the milling cutter of the present embodiment is smaller than that of the bending groove of embodiment 1, and the amount of filler can be further reduced.

Example 3

This embodiment is substantially the same as embodiment 1, except that:

as shown in fig. 6, in this embodiment, the milling cutter further includes a stop plate 3 for limiting the depth of the milling groove, where the stop plate 3 includes a connection portion connected to the cutter handle 2 and a stop portion protruding from a side edge of the connection surface forming portion 11, where the side edge is a portion of the connection surface forming portion 11 farthest from the cutter handle 2, that is, an end portion of a bottom surface of the connection surface forming portion 11 in the present application. The specific shape of the stop plate 3 is not limited, for example, it may be a strip plate, one end of which is a connecting portion to be connected with the tool shank 2, and the other end is a free end, and by controlling the length of the strip plate to be greater than the radius of the bottom surface of the connecting surface forming portion 11, the free end of the strip plate protrudes from the end portion of the bottom surface of the connecting surface forming portion 11, and the protruding portion forms a stop portion. Also in this embodiment, the stop plate 3 is a circular plate, and a through hole is arranged in the center of the circular plate and is sleeved on the tool handle 2 through the through hole, and the through hole is a connecting part; the radius of the circular plate is larger than the radius of the bottom surface of the connecting surface forming part 11, and the annular part of the circular plate protruding out of the connecting surface forming part 11 is a stop part.

The use mode of the stop plate 3 is as follows: when the cutter head 1 is used for milling grooves, the cutter head starts from the plate surface and continuously stretches into the plate while rotating, and when the cutter head 1 stretches into the stop part of the stop plate 3 to be abutted to the plate surface of the plate, the depth of the milling grooves reaches the required depth, and then continuous milling grooves can be stopped, so that the milling grooves are prevented from being too shallow or too deep.

In order to adapt to different milling groove depths, the distance between the stop plate 3 and the top surface of the cutter head 1 can be adjusted by detachably connecting the stop plate 3 with the cutter handle 2, and the distance between the stop plate 3 and the top surface of the cutter head 1 is the groove depth. The detachable connection mode is not limited, in this embodiment, the cutter handle 2 is provided with external threads, the through hole of the stop plate 3 is set to be an internal threaded hole, and under the action of threaded connection, the stop plate 3 can move up or down on the cutter handle 2 in a rotating manner so as to adjust the distance between the stop plate 3 and the top surface of the cutter head 1. For the convenience of use, the handle 2 may be provided with graduation marks along its axial direction for indicating the position of the stop plate 3 on the handle 2, and further indicating the depth of the groove between the stop plate 3 and the top of the cutter head 1.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the application. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the application or exceeding the scope of the application as defined in the accompanying claims.

Claims (10)

1. The utility model provides a PVC decorative board external corner milling cutter for shaping, includes tool bit (1) and handle of a knife (2), its characterized in that: the tool bit (1) comprises a connecting surface forming part (11) connected with the tool handle (2), and a bending groove forming part (12) connected with the connecting surface forming part (11); the connecting surface forming part (11) comprises a connecting surface forming side surface (111), wherein an angle alpha is formed between the connecting surface forming side surface (111) and the radial direction of the cutter handle (2), and alpha is smaller than 90 degrees; the bending groove forming part (12) comprises a groove wall forming side surface (121), wherein an angle beta is formed between the groove wall forming side surface (121) and the radial direction of the cutter handle (2), and alpha is more than or equal to 90 degrees.

2. The milling cutter for forming the external corners of the PVC veneer according to claim 1, wherein: alpha is 45 deg..

3. The milling cutter for forming the external corners of the PVC veneer according to claim 1, wherein: the bending groove forming part (12) further comprises a groove bottom forming top surface (122), and an obtuse angle is formed between the groove bottom forming top surface (122) and the groove wall forming side surface (121).

4. A milling cutter for forming external corners of PVC veneers according to claim 3, wherein: rounded corners are arranged between the groove bottom forming top surface (122) and the groove wall forming side surface (121).

5. A milling cutter for forming external corners of PVC veneers according to claim 3, wherein: the groove bottom forming top surface (122) is a convex cambered surface protruding towards a direction away from the cutter handle (2).

6. The milling cutter for forming the external corners of the PVC veneer according to claim 1, wherein: rounded corners are arranged between the groove wall forming side surfaces (121) and the connecting surface forming side surfaces (111).

7. The milling cutter for forming the external corners of the PVC veneer according to claim 1, wherein: the connecting surface forming part (11) comprises a first central shaft overlapped with the central shaft of the knife handle (2) and a plurality of first blades which are annularly and uniformly arranged on the first central shaft, and the cutting edge part of each first blade forms the connecting surface forming side surface (111); the bending groove forming part (12) comprises a second central shaft overlapped with the central shaft of the cutter handle (2) and a plurality of second blades which are annularly and uniformly arranged on the second central shaft, and the cutting edge part of each second blade forms the groove wall forming side surface (121).

8. The milling cutter for forming the external corners of the PVC veneer according to claim 1, wherein: the milling cutter further comprises a stop plate (3) for limiting the depth of the milling groove, wherein the stop plate (3) comprises a connecting part connected with the cutter handle (2) and a stop part protruding out of the side edge of the connecting surface forming part (11).

9. The milling cutter for forming the external corners of the PVC veneer according to claim 8, wherein: the tool handle (2) is provided with external threads, the connecting part is an internal threaded hole arranged in the center of the stop plate (3), and the connecting part is in threaded connection with the tool handle (2).

10. The milling cutter for forming the external corners of the PVC veneer according to claim 9, wherein: the knife handle (2) is provided with scale marks along the axial direction of the knife handle.