Tool rest suitable for on-line cutting force measurement of vertical tool sharpener

Abstract

The invention discloses a tool rest suitable for online cutting force measurement of a vertical tool sharpener, and relates to the technical field of tool grinding force detection. The device can monitor the change of the grinding force in the cutter grinding process in real time, provides a basis for analyzing the influence of each parameter on the grinding force in the grinding process and optimizing the cutter grinding process, and has the advantages of being compact in structure and low in machining cost. The tool rest comprises a front clamp, a rear clamp and a force transducer. The front end of the front clamp is provided with a cutter mounting hole, and the rear end is provided with a sensor mounting hole; and the lower end of the force transducer is connected to the rear clamp, and the upper end of the force transducer extends into the sensor mounting hole and is in contact with the hole wall of the sensor mounting hole. The performance of the tool rest suitable for the vertical tool sharpener is improved.

Description

Technical Field

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

[0002] In tool grinding, accurate measurement of cutting force is extremely important. This can not only detect the grinding status of the tool in real time, but also more clearly analyze whether the tool is affected by the grinding force during the grinding process. Most of the existing tool grinding devices are unable to detect the force during the grinding process. Especially in the grinding process of sharp tools, the formation of the cutting edge is greatly affected by the grinding force. The existing devices cannot accurately capture the changes in force during the grinding process. In addition, due to the complex structure and high cost of existing tool grinding devices, it poses a great challenge to the grinding of precision and ultra-precision tools. Summary of the invention

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

[0004] To achieve the above-mentioned purpose, an embodiment of the present application provides a tool holder suitable for online cutting force measurement of a vertical tool grinder, comprising 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 with the hole wall of the sensor mounting hole.

[0005] Furthermore, the front clamp 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 from front to back; the sensor mounting plate is provided with a sensor mounting hole that passes through from top to bottom.

[0006] Furthermore, 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; and the lower end of the force sensor is connected to the first fixing plate.

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

[0008] Furthermore, 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.

[0009] Furthermore, the tool installation hole and the tool installation groove have a width of 8 to 10 mm and a height of 8 to 10 mm.

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

[0011] Furthermore, 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.

[0012] Furthermore, the length of the tool mounting groove is greater than the length of the first fixing plate; a second fixing plate is also 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.

[0013] Furthermore, the length of the bottom plate is greater than that of the vertical plate, and the longitudinal cross-section of the bottom plate is a trapezoid that is larger at the top and smaller at the bottom; a limiting groove is provided on the rear surface of the bottom plate.

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

[0015] 1. The tool holder of the embodiment of the present application includes a front clamp, a rear clamp and a force sensor. The front clamp fixes the tool, and the rear clamp is connected to the force sensor. The force sensor contacts the tool inserted into the rear clamp. It can not only monitor the change of grinding force during the tool grinding process in real time, but also provide a basis for analyzing the influence of various parameters on the grinding force during the grinding process and optimizing the tool grinding process by changing the parameters, and it also has the advantages of compact structure and low processing cost.

[0016] 2. In the embodiment of the present application, a tool mounting hole is provided in the front clamp of the tool holder, and a tool mounting groove is provided in the rear clamp. The tool is fixedly installed in the tool mounting hole and the tool mounting groove by tool fastening screws arranged on the top wall and side walls of the tool mounting hole; the top opening of the tool mounting groove is connected to the first fixing plate by bolts, and the force sensor is connected to the first fixing plate by threads. It not only has the advantages of simple and compact structure and easy disassembly, but also the positioning of each component is simple and the fit is tight, which can effectively avoid installation errors.

[0017] 3. A gap is provided between the front fixture and the rear tool in the tool holder of the embodiment of the present application. When the front fixture is slightly displaced due to the squeezing force during the grinding process, it will not contact the front surface of the rear fixture, thereby reducing detection errors.

[0018] 4. The tool mounting hole in the tool holder of the embodiment of the present application is designed to be widened and heightened, and is connected to the tool mounting groove, so that clamps of different sizes can be installed to clamp and grind precision and ultra-precision cutting tools of different cutting edge shapes and different models in combination with the clamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a tool holder suitable for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application;

[0021] Figure 2 This is a schematic structural diagram of a front clamp in a tool holder for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application;

[0022] Figure 3 This is a schematic structural diagram of a rear fixture in a tool holder for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application;

[0023] Figure 4 This is a schematic structural diagram of a second tool mounting block in a tool holder for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the structure of the limit groove in the tool holder suitable for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application;

[0025] Figure 6 This is a schematic structural diagram of a first fixed plate in a tool holder for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application;

[0026] Figure 7 This is a schematic structural diagram of a second fixed plate in a tool holder for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application;

[0027] Figure 8 This is a schematic diagram of the structure of a measuring sensor in a tool holder for online cutting force measurement of a vertical tool grinder according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, they can understand the specific meanings of the above terms in this application according to specific circumstances.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" can explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0032] The embodiment of the present application provides a tool holder suitable for online cutting force measurement of a vertical tool grinder. It is not only compact in structure and small in size and can be installed with different tools, but also can realize the measurement and real-time monitoring of the grinding force of precision and ultra-precision tools with different cutting edge types, providing a basis for controlling the processing time and the contact state between the tool and the grinding disc.

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

[0034] Reference Figure 2 The front fixture 1 includes an integrally formed first tool mounting block 11, a sensor mounting plate 12 and a vertical connecting plate 13. The first tool mounting block 11 and the sensor mounting plate 12 are both arranged horizontally.

[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 tool mounting hole 14 which passes through from front to back. Specifically, the first tool mounting block 11 is similar to a hollow rectangular parallelepiped structure, the inner cavity of the first tool mounting block 11 is the tool mounting hole 14, and tool fastening screws 15 are provided on the top wall and the side walls. The tool fastening screws 15 are M3 bolts. The rear end width of the first tool mounting block 11 is greater than the front end width, and the left and right side surfaces both include a section of inclined surface. The lower ends of the left and right side surfaces of the first tool mounting block 11 are also provided with an installation inclined surface 16.

[0036] When performing tool grinding operations, insert the tool handle into the tool mounting hole 14 and fasten it with the tool fastening screws 15 on the side and top to 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 heightened, and passes through the front clamp, which can flexibly adapt to tool handles of different cross-sectional sizes and lengths. Specifically, the width and height of the tool mounting hole 14 are both 8 to 10 mm.

[0037] Reference Figure 8 The force sensor 3 adopts the Kistler9017C model. The force sensor 3 can receive the force feedback signal generated by the polishing disc squeezing the tool. The sensor mounting plate 12 is connected to the upper surface of the vertical connecting plate 13 and extends backward. The sensor mounting plate 12 is provided with a sensor mounting hole 17 that passes through from top to bottom. The sensor mounting hole 17 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 5mm, which can reliably contact the force sensor 3 and transmit the changes in the grinding force of the tool during the grinding process to the force sensor 3. The rear side surface of the sensor mounting plate 12 is a semi-cylindrical 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 weight-reducing holes 18 .

[0039] Reference Figures 3 to 7 The rear fixture 2 includes a second tool mounting block 21 , a first fixing plate 22 and a second fixing plate 23 .

[0040] The rear width of the second tool mounting block 21 is greater than the front width, and the front ends of the left and right sides of the second tool mounting block 21 are inclined. The second tool mounting block 21 is parallel to the vertical connecting plate 13, and a gap of 1 mm is provided between the two. Therefore, when the front fixture 1 is slightly displaced due to the squeezing force during the grinding process, it will not contact the front surface of the rear fixture 2, reducing the error.

[0041] The second tool mounting block 21 includes a bottom plate 211 and two vertical plates 212. The length of the bottom plate 211 is greater than the length of the vertical plates 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 together form a tool mounting groove 213. The width and height of the tool mounting groove 213 are adapted to the width and height of the tool mounting hole 14. After the front fixture 1 and the rear fixture 2 are assembled, the mounting groove 211 is connected to the tool mounting hole 14, and the bottom surfaces of the two are parallel, so that tool holder fixtures of different lengths can be installed.

[0042] The bottom plate 211 is a trapezoidal plate, that is, the longitudinal section of the bottom plate 211 is a trapezoidal shape with a larger upper portion and a smaller lower portion. The bottom plate 211 is slidably clamped on the knife sharpener. A limiting groove 214 is provided at the rear end of the bottom plate 211. The limiting groove 214 is used for limiting to prevent the tool from being squeezed and retreating during the grinding process.

[0043] The first fixing plate 22 and the second fixing plate 23 are both connected to the top opening of the tool installation slot 213 by means of the hexagon socket bolts 24. The first fixing plate 22 is arranged near the front end of the tool installation slot 213, and the second fixing plate 23 is arranged near the rear end of the tool installation slot 213. Specifically, four first countersunk holes 221 are arranged on the first fixing plate 22, and second countersunk holes 231 are arranged on the four corners of the second fixing plate 23, and eight threaded holes 215 are arranged on the vertical plate 212. The hexagon socket bolts 24 pass through the first countersunk holes 221 or the second countersunk holes 231 and are connected to the corresponding threaded holes 215. The hexagon socket bolts 24 are also M3 bolts.

[0044] A threaded hole 222 is also provided at the center of the first fixing plate 22, 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 fixing plate 22 can ensure the stability of the tool installation groove 213 and bear the vertical pressure of the tool grinding frame, and has the functions of fixing and adjusting.

[0046] The second fixing plate 23 can prevent the groove body from being deformed, and at the same time bear the pressure from the positioning bolts on the tool holder of the knife sharpener, limit the deviation of the upper and lower positions, and prevent loosening.

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

[0048] In summary, the tool holder for online cutting force measurement of a vertical knife sharpener in the embodiment of the present application can be equipped with different types of tool handles to achieve tool grinding. When designing the grinding tool handle, the shape of the front part of the tool handle can be changed according to the needs, and no other additional design is required. The material of the entire device is stainless steel, which meets the rigidity and strength requirements and will not rust after long-term use.

[0049] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on 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 with the hole wall of the sensor mounting hole.

2. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 1, characterized in that: 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 from front to back; the sensor mounting plate is provided with a sensor mounting hole that passes through from top to bottom.

3. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 2, characterized in that: The rear fixture comprises 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; and the lower end of the force sensor is connected to the first fixing plate.

4. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 3, characterized in that: A gap is provided between the vertical connecting plate and the second tool mounting block.

5. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 2, characterized in that: 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.

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

7. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 2, characterized in that: The thickness of the sensor mounting plate is 5 mm.

8. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 3, characterized in that: The second tool installation block comprises 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 installation groove.

9. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 8, characterized in that: The length of the tool installation groove is greater than that of the first fixing plate; a second fixing plate is also provided at the top opening of the tool installation groove, the first fixing plate is arranged near the front end of the tool installation groove, and the second fixing plate is arranged near the rear end of the tool installation groove.

10. The tool holder suitable for online cutting force measurement of a vertical tool grinder according to claim 9, 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 that is larger at the top and smaller at the bottom; a limiting groove is provided on the rear surface of the bottom plate.

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