Precise grinding head

Abstract

The utility model discloses a precise grinding head, which comprises a rod body, a grinding head and a grinding head, a first embedded cavity is formed in one end of the elastic body, and the connecting section is arranged in the first embedded cavity; and the head part is provided with a mounting end and a grinding end, the mounting end is provided with a second embedded cavity, the elastic body is arranged in the second embedded cavity, and the connecting section is partially or completely located in the second embedded cavity. By the adoption of the scheme, the elastic body is arranged between the rod body and the head, so that when the grinding head passes through the fluctuating surface needing to be polished, the relative position between the rod body and the head is elastically and finely adjusted through the elastic body, and it is guaranteed that the head is stably pressed on the surface needing to be polished; and the precise grinding head is prevented from being damaged due to excessive pressure generated on the head part and the rod body.

Description

Technical Field

[0001] The utility model belongs to the field of grinding devices, and in particular relates to a precision grinding head. Background Art

[0002] Polishing process is an indispensable part in the mold production process. The high-speed rotating grinding head rolls and slightly cuts the mold surface to reduce the roughness of the mold surface, thereby obtaining a bright processed surface and meeting the mold precision requirements.

[0003] The existing grinding head usually includes a rod and a head, and the head is fixedly mounted on one end of the rod by means of clamping, bonding, etc. When in use, the rod is arranged on a mobile device that can rotate at high speed, and the head is abutted against the surface to be polished, so that the mobile device is started to realize high-speed rotation of the rod and the head, and the head passes through various areas of the surface to be polished along a specific route under the movement of the mobile device to realize polishing.

[0004] The shortcomings of the existing grinding heads are that the rod and the head are both relatively hard components, and there is no elastic travel between each of them and between the two. In order to ensure that the head always fits the surface to be polished, a certain pressure needs to be applied to the rod. However, the pressure changes greatly during the undulation of the surface to be polished, which can easily cause excessive pressure to cause pits to appear on the surface to be polished, thereby damaging the grinding head and the mold. It is also easy for the head to completely separate from the surface to be polished, resulting in unpolished. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a precision grinding head by arranging an elastic body between the rod body and the head so that when the grinding head passes through the undulating surface to be polished, the relative position between the rod body and the head can be fine-tuned by the elasticity of the elastic body, which not only ensures that the head is stably pressed on the surface to be polished, but also prevents the head and the rod body from being damaged by excessive pressure.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: comprising: a rod body, a connecting section is provided at one end of the rod body; an elastomer, a first embedded cavity is provided at one end of the elastomer, and the connecting section is configured in the first embedded cavity; a head, the head is provided with a mounting end and a grinding end, the mounting end is provided with a second embedded cavity, the elastomer is placed in the second embedded cavity, and the connecting section is partially or completely located in the second embedded cavity.

[0007] The utility model is further configured as follows: the rod body is made of SKD61 material.

[0008] The utility model is further configured as follows: the grinding end is configured in an arc surface.

[0009] The utility model is further configured as follows: the hardness of the elastic body is 85° to 99°.

[0010] The utility model is further configured as follows: the elastic body comprises a spherical portion, and the outer peripheral cross-section of the spherical portion increases first and then decreases from one end close to the rod body to one end far from the rod body.

[0011] The utility model is further configured as follows: a push plane is arranged at one end of the spherical portion away from the rod body, and a contact plane parallel to and abutting against the push plane is arranged in the second embedded cavity; the push plane and the axial direction of the rod body are perpendicular to each other.

[0012] The utility model is further configured as follows: a columnar portion is provided at one end of the spherical portion facing the top rod, and the second embedded cavity is provided with a columnar cavity that is adapted to the shape and size of the columnar portion.

[0013] The utility model is further configured as follows: a plurality of clamping parts are circumferentially arranged on the outer periphery of the spherical part, a plurality of clamping grooves are arranged in the second embedded cavity, and the clamping parts are clamped in the clamping grooves to realize circumferential limitation of the elastic body and the head.

[0014] The utility model is further configured as follows: the clamping portion is provided with an arcuate end face and parallel side faces located on both sides of the arcuate end face; the spacing between the arcuate end face and the outer peripheral surface of the spherical portion is s, and the size of s and the size of the outer peripheral cross-section of the spherical portion have the same change trend from one end close to the rod body to the end away from the rod body; the angle between the parallel side faces and the arcuate end face is α, 85°≤α≤95°.

[0015] The utility model is further configured as follows: an abutting end surface is provided at one end of the rod body located at the connecting section, and the abutting end surface abuts against the elastic body.

[0016] By adopting the above technical solution, an elastomer is used as an intermediate piece to connect the rod body and the head. During polishing, a large pressure is applied to the rod body to transmit the force to the head under the deformation of the elastomer, so that the head effectively fits the surface to be polished, and during the movement of the grinding head, even if the head passes through an undulating surface, the elastomer will elastically adapt. 1. When the head passes through a gradually rising surface, the elastomer is further compressed to adapt the head to rise, thereby preventing the head from not rising with the surface and causing the interaction force between the head and the surface to increase sharply, resulting in damage to the grinding head and wear of the surface to be polished; 2. When the head passes through a gradually lowered surface, the elastomer is reset to cause the head to move downward to ensure contact with the surface, thereby preventing the head from detaching from the surface to be polished and causing the polishing area to be unable to be completely covered. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is an assembly diagram of a specific implementation method of the utility model;

[0019] Figure 2 It is a cross-sectional view of a specific implementation mode of the utility model;

[0020] Figure 3 It is an exploded view of a specific implementation method of the utility model;

[0021] Figure 4 for Figure 2 A partial enlarged view of

[0022] Figure 5 It is a part diagram of the elastic body in a specific implementation mode of the utility model;

[0023] Figure 6 It is a cross-sectional view of an elastic body in a specific embodiment of the utility model;

[0024] Figure 7 for Figure 6 A magnified view of middle;

[0025] Figure 8 It is a three-dimensional cross-sectional view of the head in a specific implementation manner of the utility model.

[0026] Description of reference numerals:

[0027] 1. Rod body;

[0028] 11. connecting section; 12. abutting end surface;

[0029] 2. Elastomer;

[0030] 21. first embedded cavity; 22. spherical portion; 23. push plane; 24. columnar portion; 25. clamping portion;

[0031] 251, arc-shaped end face; 252, parallel side face;

[0032] 3. Head;

[0033] 31. second embedded cavity; 32. mounting end; 33. grinding end;

[0034] 311, spherical cavity; 312, abutment plane; 313, columnar cavity; 314, snap-fit ​​groove. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention. The conventional selections and substitutions made by those skilled in the art under the guidance of the present invention shall be deemed to be within the scope of protection claimed by the present invention.

[0036] like Figure 1-Figure 8 As shown, the utility model discloses a precision grinding head, comprising:

[0037] The rod body 1 is cylindrical in shape as a whole, and the axial direction of the rod body 1 is arranged vertically. In addition, a cylindrical connecting section 11 is arranged at the lower end of the rod body 1;

[0038] The elastic body 2 has a first embedded cavity 21 at its upper end, and the shape of the first embedded cavity 21 matches the shape of the connecting section 11, so that the connecting section 11 is disposed in the first embedded cavity 21;

[0039] The head 3 has a mounting end 32 at its upper end and a grinding end 33 at its lower end. The mounting end 32 has a second embedded cavity 31 . The elastomer 2 is placed in the second embedded cavity 31 . In addition, the connecting section 11 is entirely located in the second embedded cavity 31 .

[0040] Therefore, the rod body 1 and the head 3 are connected by an elastomer 2 as an intermediate piece. During polishing, a large pressure is applied to the rod body 1 so that the force is transmitted to the head 3 under the deformation of the elastomer 2, and the head 3 effectively fits the surface to be polished. In the process of movement of the grinding head, even if the head 3 passes through an undulating surface, the elastomer 2 will elastically adapt. 1. When the head 3 passes through a gradually rising surface, the elastomer 2 is further compressed to make the head 3 adapt and rise, preventing the head 3 from not rising with the surface and causing the interaction force between the head 3 and the surface to increase sharply, resulting in damage to the grinding head and wear of the surface to be polished; 2. When the head 3 passes through a gradually lowered surface, the elastomer 2 is reset to make the head 3 move downward to ensure contact with the surface, preventing the head 3 from detaching from the surface to be polished, resulting in the polishing area not being fully covered. In summary, more precise polishing is achieved.

[0041] In other embodiments, the connecting section 11 is only partially inserted into the second embedded cavity 31 .

[0042] Preferably, the rod body 1 in this embodiment is made of SKD61 material, so that the rod body 1 has good rigidity characteristics and avoids vibration during the high-speed rotation of the grinding head.

[0043] Preferably, the outer circumference of the head 3 in this embodiment is cylindrical, and the grinding end 33 is hemispherical.

[0044] Preferably, the hardness of the elastomer 2 in this embodiment is 85° to 99°, so that the elastomer 2 has good wear resistance, and is not easily worn when in contact with the head 3 having a certain surface roughness, thereby ensuring the stability of the connection between the elastomer 2 and the head 3.

[0045] Specifically, the head 3 is made of a mixture of synthetic resin and hard particles, such as corundum or artificial sand, so that the head 3 has the characteristics of high temperature resistance and wear resistance.

[0046] Specifically, the connecting section 11 can be inserted into the first embedded cavity 21 and interfere with each other to achieve high-strength connection between the rod body 1 and the elastic body 2, or the connecting section 11 can be inserted into the first embedded cavity 21 and glued to achieve high-strength connection between the rod body 1 and the elastic body 2, or the elastic body 2 is covered on the outer periphery of the connecting section 11 during the injection molding process to achieve high-strength connection between the rod body 1 and the elastic body 2. Similarly, the elastic body 2 can be embedded in the second embedded cavity 31 and interfere with each other to achieve high-strength connection between the elastic body 2 and the head 3, or the elastic body 2 can be embedded in the second embedded cavity 31 and glued to achieve high-strength connection between the elastic body 2 and the head 3, or the elastic body 2 is filled in the second embedded cavity 31 during the injection molding process to achieve high-strength connection between the elastic body 2 and the head 3.

[0047] Among them, the elastomer 2 in this embodiment includes a spherical portion 22, and the outer peripheral cross-section of the spherical portion 22 first increases and then decreases from top to bottom. Correspondingly, the second embedded cavity 31 is provided with a spherical cavity 311 that is adapted to the shape and size of the spherical portion 22, so that the stability of the connection between the elastomer 2 and the head 3 is ensured under the cooperation of the spherical portion 22 and the spherical cavity 311.

[0048] Preferably, a push plane 23 is provided at the lower end of the spherical portion 22 in this embodiment, and a contact plane 312 parallel to and abutting against the push plane 23 is provided in the second embedded cavity 31; and the push plane 23 is a horizontal plane.

[0049] Therefore, under the action of the pushing plane 23 and the abutting plane 312, the spherical portion 22 is subject to different degrees of rotation restriction relative to the spherical cavity 311 in directions other than the vertical axis, thereby ensuring the stability of the assembly of the elastomer 2 and the head 3. In addition, the rod body 1 usually applies a force downward, which is perpendicular to the pushing plane 23, and the applied force basically does not produce a deflection component force that causes the elastomer 2 to rotate relative to the head 3, so that a larger force can be applied downward to ensure that the head 3 stably fits the surface to be polished.

[0050] Preferably, in this embodiment, a columnar portion 24 is integrally formed on the upper end of the spherical portion 22 , and the second embedded cavity 31 is provided with a columnar cavity 313 that matches the shape and size of the columnar portion 24 .

[0051] Therefore, with the cooperation of the columnar portion 24 and the columnar cavity 313, the spherical portion 22 is subject to different degrees of rotation restriction relative to the spherical cavity 311 in directions other than the vertical axis, ensuring the stability of the assembly of the elastomer 2 and the head 3. In addition, the push plane 23 is at the bottom and the columnar portion 24 is at the top so that the upper and lower parts jointly restrict the rotation of the spherical portion 22.

[0052] The columnar portion 24 in this embodiment is a cylinder. The cylindrical columnar portion 24 makes the circumferential structure of the grinding head more uniform, simple in structure, and uniform in force. Other embodiments may also use a polygonal prism.

[0053] In addition, the outer periphery of the spherical portion 22 in this embodiment is circumferentially provided with multiple clamping portions 25, and the second embedded cavity 31 is provided with multiple clamping grooves 314. The clamping portions 25 are clamped in the clamping grooves 314 to achieve circumferential limitation of the elastic body 2 and the head 3.

[0054] Specifically, the clamping portion 25 is provided with an arc-shaped end surface 251 and parallel side surfaces 252 located on both sides of the arc-shaped end surface 251 .

[0055] The upper and lower ends of the arcuate end surface 251 are respectively connected to the outer circumferential surface of the spherical portion 22, and the distance between the arcuate end surface 251 and the outer circumferential surface of the spherical portion 22 is s. The size of s has the same trend as the size change of the outer circumferential cross-section of the spherical portion 22 from top to bottom, so that the arcuate end surface 251 and the outer circumference of the spherical portion 22 are more adapted, and the shape of the arcuate end surface 251 makes the limiting force of the clamping portion 25 close to the plane where the diameter of the spherical portion 22 is located greater, thereby better transmitting the force to the spherical portion 22 to better bear the load and ensure strength.

[0056] The included angle between the parallel side surface 252 and the arc-shaped end surface 251 is α, 85°≤α≤95°, so that the parallel side surface 252 and the arc-shaped end surface 251 are close to perpendicular, and the circumferential force can be effectively carried.

[0057] Among them, the lower end of the rod body 1 in this embodiment is provided with an abutting end surface 12, and the abutting end surface 12 abuts against the elastomer 2, so that under the downward force of the top rod, part of the force acts on the elastomer 2 through the abutting end surface 12, and part of the force acts on the elastomer 2 through the connecting section 11, thereby increasing the contact area and making the elastomer 2 subject to force at multiple positions to prevent stress concentration in the elastomer 2.

[0058] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A precision grinding head, characterized in that: include: A rod body (1), wherein one end of the rod body (1) is provided with a connecting section (11); An elastic body (2), wherein one end of the elastic body (2) is provided with a first embedded cavity (21), and the connecting section (11) is arranged in the first embedded cavity (21); A head (3), wherein the head (3) is provided with a mounting end (32) and a grinding end (33), the mounting end (32) is provided with a second embedded cavity (31), the elastomer (2) is disposed in the second embedded cavity (31), and the connecting section (11) is partially or entirely located in the second embedded cavity (31).

2. The precision grinding head according to claim 1, characterized in that: The rod body (1) is made of SKD61 material.

3. The precision grinding head according to claim 1, characterized in that: The grinding end (33) is arranged in the form of an arc surface.

4. The precision grinding head according to claim 1, characterized in that: The hardness of the elastomer (2) is 85° to 99°.

5. The precision grinding head according to claim 1, characterized in that: The elastic body (2) comprises a spherical portion (22), and the outer peripheral cross-section of the spherical portion (22) first increases and then decreases from an end close to the rod body (1) to an end away from the rod body (1).

6. The precision grinding head according to claim 5, characterized in that: A pushing plane (23) is provided at one end of the spherical portion (22) facing away from the rod body (1), and a contact plane (312) parallel to and abutting against the pushing plane (23) is provided in the second embedded cavity (31); The thrust plane (23) and the axial direction of the rod body (1) are perpendicular to each other.

7. The precision grinding head according to claim 5, characterized in that: The spherical portion (22) is provided with a columnar portion (24) at one end facing the top rod, and the second embedded cavity (31) is provided with a columnar cavity (313) whose shape and size match those of the columnar portion (24).

8. The precision grinding head according to claim 5, characterized in that: The outer periphery of the spherical portion (22) is provided with a plurality of clamping portions (25) along the circumferential direction, and the second embedded cavity (31) is provided with a plurality of clamping grooves (314). The clamping portions (25) are clamped in the clamping grooves (314) to achieve circumferential limiting of the elastic body (2) and the head (3).

9. The precision grinding head according to claim 8, characterized in that: The clamping portion (25) is provided with an arc-shaped end surface (251) and parallel side surfaces (252) located on both sides of the arc-shaped end surface (251); The distance between the arc-shaped end surface (251) and the outer peripheral surface of the spherical portion (22) is s, and the size of s and the size of the outer peripheral cross section of the spherical portion (22) have the same change trend from the end close to the rod body (1) to the end far from the rod body (1); The included angle between the parallel side surface (252) and the arc-shaped end surface (251) is α, and 85°≤α≤95°.

10. The precision grinding head according to claim 1, characterized in that: An abutting end surface (12) is provided at one end of the rod body (1) located at the connecting section (11), and the abutting end surface (12) abuts against the elastic body (2).

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