A tool holder suitable for online cutting force measurement in a vertical grinding machine

Abstract

The application discloses a tool holder suitable for online cutting force measurement of a vertical tool grinder, and relates to the technical field of tool grinding force detection. The tool holder can not only monitor the change of the grinding force in the tool grinding process in real time, but also provides a basis for analyzing the influence of various parameters on the grinding force in the grinding process and optimizing the tool grinding process, and has the advantages of compact structure and low processing cost. The tool holder comprises a front clamp, a rear clamp and a force sensor. The front end of the front clamp is provided with a tool mounting hole, and the rear end is provided with a sensor mounting hole. The lower end of the force sensor is connected to the rear clamp, the upper end of the force sensor extends into the sensor mounting hole, and the upper end of the force sensor is in contact with the hole wall of the sensor mounting hole. The application is used for improving the performance of the tool holder suitable for the vertical tool grinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tool grinding force detection, and particularly relates to a tool holder suitable for online cutting force measurement of a vertical tool grinder. BACKGROUND

[0002] In tool grinding processing, accurate measurement of cutting force is extremely important, which can not only detect the grinding state of the tool in real time, but also more clearly analyze whether the tool grinding process is affected by the grinding force. Most of the existing tool grinding devices cannot realize force detection in the grinding process, especially in the grinding process of sharp tools, the formation of the cutting edge is greatly affected by the grinding force, and the existing devices cannot accurately capture the change of the force in the grinding process. In addition, due to the complex structure of the existing tool grinding device, the cost is also high, which brings great challenges to the grinding processing of precision and ultra-precision tools. SUMMARY

[0003] The embodiment of the present application provides a tool holder suitable for online cutting force measurement of a vertical tool grinder, which can not only monitor the change of the grinding force in the tool grinding process in real time, but also provide a basis for analyzing the influence of various parameters in the grinding process on the grinding force and optimizing the tool grinding process, and has the advantages of compact structure and low processing cost.

[0004] To achieve the above purpose, the embodiment of the present application provides a tool holder suitable for online cutting force measurement of a vertical tool grinder, which comprises a front clamp, a rear clamp and a force sensor; the front end of the front clamp is provided with a tool mounting hole, and the rear end is provided with a sensor mounting hole; the lower end of the force sensor is connected to the rear clamp, and the upper end extends into the sensor mounting hole and contacts the hole wall of the sensor mounting hole.

[0005] Further, the front clamp comprises a first tool mounting block, a sensor mounting plate and a vertical connecting plate; the first tool mounting block is connected to the lower surface of the vertical connecting plate and extends forward; the sensor mounting plate is connected to the upper surface of the vertical connecting plate and extends backward; the first tool mounting block is provided with a front and rear through tool mounting hole; the sensor mounting plate is provided with an up and down through sensor mounting hole.

[0006] Further, the rear clamp comprises a second tool mounting block; the second tool mounting block is provided with a tool mounting groove communicated with the tool mounting hole; the first fixing plate is arranged at the top opening of the tool mounting groove; the lower end of the force sensor is connected to the first fixing plate.

[0007] Further, a gap is arranged between the vertical connecting plate and the second tool mounting block.

[0008] Further, the first tool mounting block is a hollow cuboid; the tool fastening screw is arranged on the top wall and the side wall of the hollow cuboid.

[0009] Further, the width of the tool mounting hole and the tool mounting slot is 8-10mm; the height is 8-10mm.

[0010] Further, the thickness of the sensor mounting plate is 5mm.

[0011] Further, the second tool mounting block comprises a bottom plate and two vertical plates arranged on the bottom plate; the two vertical plates are symmetrically arranged left and right; the bottom plate and the two vertical plates jointly enclose the tool mounting slot.

[0012] Further, the length of the tool mounting slot is greater than the length of the first fixed plate; a second fixed plate is further arranged at the top opening of the tool mounting slot; the first fixed plate is arranged close to the front end of the tool mounting slot, and the second fixed plate is arranged close to the rear end of the tool mounting slot.

[0013] Further, the length of the bottom plate is greater than the length of the vertical plate, and the longitudinal section of the bottom plate is a trapezoid with the top larger than the bottom; a limiting groove is arranged on the rear surface of the bottom plate.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The tool holder of the present application comprises a front clamp, a rear clamp and a force sensor; the front clamp fixes the tool, the rear clamp connects the force sensor, and the force sensor contacts the tool extending into the rear clamp; not only can the change of the grinding force in the tool grinding process be monitored in real time, which provides a basis for analyzing the influence of various parameters on the grinding force in the grinding process and optimizing the tool grinding process by changing the parameters, but also has the advantages of compact structure and low processing cost.

[0016] 2. The front clamp in the tool holder of the present application is provided with a tool mounting hole, and the rear clamp is provided with a tool mounting slot; the tool is fixedly installed in the tool mounting hole and the tool mounting slot through tool fastening screws arranged on the top wall and the side wall of the tool mounting hole; the top opening of the tool mounting slot is connected with a first fixed plate through bolts, and the force sensor is connected with the first fixed plate through threads; not only has the advantages of simple and compact structure and convenient disassembly, but also the positioning between the parts is simple and the cooperation is tight, which can effectively avoid installation errors.

[0017] 3. The gap is arranged between the front clamp and the rear tool in the tool holder of the present application; when the front clamp slightly shifts due to the extrusion of force in the grinding process, it will not contact the front surface of the rear clamp, thereby reducing the detection error.

[0018] 4. The cutter mounting hole in the tool holder of the embodiment of the present application is designed to be widened and raised, and is in communication with the cutter mounting groove, so that clamps of different sizes can be installed and clamped, and the grinding work of precision and ultra-precision cutting tools of different cutting edge shapes and different models can be realized by cooperating with the clamps. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 Structure diagram of the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application;

[0021] Figure 2 Structure diagram of the front clamp in the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application;

[0022] Figure 3 Structure diagram of the rear clamp in the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application;

[0023] Figure 4 Structure diagram of the second cutter mounting block in the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application;

[0024] Figure 5 Structure diagram of the limiting groove in the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application;

[0025] Figure 6 Structure diagram of the first fixed plate in the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application;

[0026] Figure 7 Structure diagram of the second fixed plate in the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application;

[0027] Figure 8 Structure diagram of the measurement sensor in the tool holder suitable for the online cutting force measurement of the vertical tool grinder according to the embodiment of the present application. DETAILED DESCRIPTION

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the scope of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; for those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0031] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0032] The embodiments of the present application provide a tool holder suitable for online cutting force measurement of a vertical knife grinder, which not only has compact structure and small size, but also can cooperate with different tool installations, and can realize precise and ultra-precise tool grinding force measurement and real-time monitoring of different cutting edge types, thereby providing a basis for controlling processing time and contact state of the tool and the grinding disc.

[0033] Referring to Figures 1 to 8 The tool holder suitable for online cutting force measurement of the vertical knife grinder according to the embodiments of the present application comprises a front clamp 1, a rear clamp 2 and a force sensor 3.

[0034] Referring to Figure 2 The front clamp 1 comprises a first tool mounting block 11, a sensor mounting plate 12 and a vertical connecting plate 13 which are integrally formed. The first tool mounting block 11 and the sensor mounting plate 12 are both horizontally arranged.

[0035] The first tool mounting block 11 is connected to the lower surface of the vertical connecting plate 13 and extends forward. The first tool mounting block 11 is provided with a front-to-rear through tool mounting hole 14. Specifically, the first tool mounting block 11 is a hollow cuboid structure, the inner cavity of the first tool mounting block 11 is the tool mounting hole 14, and the top wall and the side wall are both provided with tool fastening screws 15. The tool fastening screws 15 are M3 bolts. The rear end of the first tool mounting block 11 is wider than the front end, and the left and right sides both include a beveled surface. The left and right sides of the first tool mounting block 11 are also provided with installation bevels 16 at the lower end.

[0036] When performing tool grinding, the tool handle portion is inserted into the tool mounting hole 14 and fastened by the tool fastening screws 15 on the side and top, which can prevent the tool from shifting during grinding. After installation, the tool faces the polishing disc. In addition, the tool mounting hole 14 is widened and raised, and penetrates the front clamp, which can flexibly adapt to different cross-sectional sizes and lengths of the tool handle. Specifically, the width and height of the tool mounting hole 14 are both 8-10 mm.

[0037] Referring to Figure 8 , the force sensor 3 is of Kistler 9017C type, and can receive the force feedback signal generated by the polishing disc pressing the tool. The sensor mounting plate 12 is connected to the upper surface of the vertical connecting plate 13 and extends rearward. The sensor mounting plate 12 is provided with an up-to-down through sensor mounting hole 17, which is a circular hole. The upper end of the force sensor 3 extends into the sensor mounting hole 14 and contacts the hole wall of the sensor mounting hole 17. The thickness of the sensor mounting plate 12 is 5 mm, which can reliably contact the force sensor 3 and transmit the change of grinding force of the tool during grinding to the force sensor 3. The rear side of the sensor mounting plate 12 is a semicylindrical surface.

[0038] The upper section of the vertical connecting plate 13 and the front end of the sensor mounting plate 12 are both provided with a weight-reducing hole 18.

[0039] Referring to Figures 3 to 7 , the rear clamp 2 includes a second tool mounting block 21, a first fixed plate 22, and a second fixed plate 23.

[0040] The rear end of the second tool mounting block 21 is wider than the front end, and the front end of the left and right sides of the second tool mounting block 21 is a beveled surface. The second tool mounting block 21 is parallel to the vertical connecting plate 13, and a gap of 1 mm is provided therebetween, so that when the front clamp 1 slightly shifts due to the extrusion of force during grinding, it will not contact the front surface of the rear clamp 2, reducing errors.

[0041] The second tool mounting block 21 comprises a bottom plate 211 and two vertical plates 212. The length of the bottom plate 211 is greater than the length of the vertical plate 212. The two vertical plates 212 are symmetrically arranged at the front end of the bottom plate 211. The bottom plate 211 and the two vertical plates 212 jointly enclose a tool mounting groove 213. The width and height of the tool mounting groove 213 are matched with the width and height of the tool mounting hole 14. After the front clamp 1 and the rear clamp 2 are assembled, the mounting groove 211 is in communication with the tool mounting hole 14, and the bottom surfaces of the two are parallel, so that different lengths of tool shank clamps can be installed.

[0042] The bottom plate 211 is a trapezoidal plate, that is, the longitudinal section of the bottom plate 211 is a trapezoid with the upper part being larger and the lower part being smaller. The bottom plate 211 is slidingly clamped on the tool grinder. The rear end of the bottom plate 211 is provided with a limiting groove 214. The limiting groove 214 is used for limiting and preventing the tool from retreating under the pressure in the grinding process.

[0043] The first fixed plate 22 and the second fixed plate 23 are connected at the top opening of the tool mounting groove 213 by means of the inner hexagonal bolt 24. The first fixed plate 22 is arranged close to the front end of the tool mounting groove 213, and the second fixed plate 23 is arranged close to the rear end of the tool mounting groove 213. Specifically, the first fixed plate 22 is provided with four first counterbores 221, the second fixed plate 23 is provided with four second counterbores 231 at the corners, and the vertical plate 212 is provided with eight threaded holes 215. The hexagonal bolt 24 is connected in the corresponding threaded hole 215 after passing through the first counterbore 221 or the second counterbore 231. The hexagonal bolt 24 is also an M3 bolt.

[0044] The first fixed plate 22 is also provided with a threaded hole 222 at the center, and the lower end of the force sensor 3 is connected in the threaded hole 222. The force sensor 3 receives the grinding force from the front clamp 1.

[0045] The first fixed plate 22 can guarantee the stability of the tool mounting groove 213, bear the pressure in the vertical direction of the tool grinder, and has the functions of fixing and adjusting.

[0046] The second fixed plate 23 can prevent the deformation of the groove body, bear the pressure from the positioning bolt of the tool grinder, limit the deviation of the upper and lower positions, and prevent loosening.

[0047] The front clamp 1 and the rear clamp 2 are made of stainless steel, which can meet the requirements of rigidity and strength.

[0048] In summary, the tool holder for online cutting force measurement of the vertical tool grinder in the embodiment of the application can install different types of tool shanks to realize the grinding of the tool. When designing the grinding tool shank, the front shape of the tool shank can be changed according to the requirements, without other additional design. The entire device is made of stainless steel, which meets the requirements of rigidity and strength, and does not rust for a long time

[0049] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any change or replacement within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tool holder suitable for online cutting force measurement of a vertical tool grinder, characterized in that: It includes a front fixture, a rear fixture and a force sensor; the front end of the front fixture is provided with a tool mounting hole, and the rear end is provided with a sensor mounting hole; the lower end of the force sensor is connected to the rear fixture, and the upper end extends into the sensor mounting hole and contacts the hole wall of the sensor mounting hole; The front fixture includes a first tool mounting block, a sensor mounting plate and a vertical connecting plate; the first tool mounting block is connected to the lower surface of the vertical connecting plate and extends forward; the sensor mounting plate is connected to the upper surface of the vertical connecting plate and extends backward; the first tool mounting block is provided with a tool mounting hole that passes through front and back; the sensor mounting plate is provided with a sensor mounting hole that passes through top and bottom; The rear fixture includes a second tool mounting block; the second tool mounting block is provided with a tool mounting groove connected to the tool mounting hole; a first fixing plate is provided at the top opening of the tool mounting groove; the lower end of the force sensor is connected to the first fixing plate; The first tool mounting block is a hollow cuboid; tool fastening screws are provided on the top wall and side walls of the hollow cuboid.

2. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 1, characterized in that: A gap is provided between the vertical connecting plate and the second tool mounting block.

3. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 1, characterized in that: The tool installation hole and the tool installation groove have a width of 8-10 mm and a height of 8-10 mm.

4. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 1, characterized in that: The thickness of the sensor mounting plate is 5 mm.

5. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 1, characterized in that: The second tool mounting block includes a bottom plate and two vertical plates arranged on the bottom plate; the two vertical plates are arranged symmetrically on the left and right; the bottom plate and the two vertical plates together form the tool mounting groove.

6. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 5, characterized in that: The length of the tool mounting groove is greater than that of the first fixing plate; a second fixing plate is further provided at the top opening of the tool mounting groove, the first fixing plate is arranged near the front end of the tool mounting groove, and the second fixing plate is arranged near the rear end of the tool mounting groove.

7. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 6, characterized in that: The length of the bottom plate is greater than that of the vertical plate, and the longitudinal section of the bottom plate is a trapezoid with a larger upper portion and a smaller lower portion; a limiting groove is provided on the rear surface of the bottom plate.

Images