Tool breakage detection device and CNC machine tool

Abstract

The present invention provides a tool breakage detection device and a numerically controlled machine tool. The tool breakage detection device includes an assembly frame and a plurality of detection devices connected under the assembly frame; the detection device includes a transmission component and a detection component; the detection component includes a laser temperature detector and a CCD camera visual detector; the surface temperature of the milling cutter is detected by the laser temperature detector and the data is transmitted to an external display screen to monitor the breakage of the milling cutter; when the temperature difference on the surface of the milling cutter is large, the operation of the machine tool is automatically suspended, and the milling cutter is photographed by the CCD camera visual detector at the same time. The surface breakage of the tool is compared and detected by built-in software uploaded to the external display, so that the milling cutter can be replaced when it is damaged, thereby avoiding defective molded products caused by timely replacement of the milling cutter.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing equipment, and in particular to a tool breakage detection device and a CNC machine tool. Background Art

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. It can move the machine and process parts according to a pre-programmed program. Generally, a tool (or other tool) is used to process parts mounted on a fixture. The tool of a CNC machine tool will be damaged after long-term use. During actual processing and production, the surface damage of the tool needs to be detected. When detecting the damage of the milling cutter, existing CNC milling machines often use multiple CCD camera visual detectors fixedly installed inside the CNC milling machine to take pictures of the milling cutter, and the surface damage of the tool is compared and detected by built-in software uploaded to an external display. This method usually requires that the machine tool tool stop working before shooting and testing can be performed, and CNC machine tools usually perform the entire process according to a pre-programmed program. If the tool is severely damaged during processing, the CCD camera visual detector cannot detect it, so the tool cannot be replaced in time, resulting in unqualified processed products. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a tool breakage detection device and a CNC machine tool to solve the above-mentioned problem.

[0004] The present invention adopts the following scheme:

[0005] The present application provides a tool breakage detection device, comprising an assembly frame and a plurality of detection devices connected to the assembly frame; the detection devices comprise a transmission assembly and a detection assembly;

[0006] The transmission assembly includes a plurality of fixed rods, a driving member, a driving wheel, a plurality of driven wheels, and a belt loop; one end of the fixed rod is connected to the assembly frame, and the driving member is provided on one of the fixed rods for driving the driving wheel connected to the other end of the fixed rod; the other end of the other fixed rod is connected to the driven wheel; the belt loop is sleeved on the driving wheel and the driven wheel;

[0007] The detection assembly includes a box body, and a laser temperature detector and a CCD camera visual detector placed on both sides of the box body; the box body is connected to the driving wheel and / or the driven wheel through a connecting rod; two chambers are formed in the box body, respectively for installing the laser temperature detector and the CCD camera visual detector; hardened thermal conductive silica gel and heat dissipation fins are provided in the chamber, and the heat dissipation fins are in contact with the wall surface of the laser temperature detector and the wall surface of the CCD camera visual detector; for installing the CCD camera visual detector A thin welding plate is provided on the outside of the cavity of the visual detector for fixing the CCD camera visual detector; a cavity cover is provided on the outside of the thin welding plate; the assembly frame includes a ring pad, an assembly ring provided on the top of the ring pad, a plurality of bent connecting rods connected between the ring pad and the assembly ring, and a plurality of arc pieces connected to the inner side of the assembly ring through support rods; a first threaded hole is provided on the arc piece; a locking stud is provided on the outside of the first threaded hole; the arc piece is used to connect the arc groove on the top of the milling cutter assembly main body shaft disk, and is locked by the locking stud.

[0008] Furthermore, it also includes an air transmission ring assembly, which is connected to the assembly frame; the detection device is connected to the air transmission ring assembly; the air transmission ring assembly is used to connect to an external air source and blow air to the tool.

[0009] Furthermore, the air transmission ring assembly includes a ring body, a ring box connected to the inner wall of the ring body, and an air guide ring box connected to the inner side of the ring box; a connecting hole is provided on the ring body for connecting to an external air source; the ring box is connected to the air guide ring box; a filter element is provided in the ring box; a plurality of air holes are provided on the inner side of the air guide ring box; and a cotton core is provided in the air holes.

[0010] Furthermore, the initial state of the detection component is that the laser temperature measurement detector is aligned with the tool.

[0011] A numerically controlled machine tool comprises the tool breakage detection device, which is connected to the milling cutter assembly body shaft disc.

[0012] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0013] 1. Since the surface of the milling cutter is usually coated with a carbide layer, when the surface of the milling cutter is damaged or worn, the carbide layer and the internal metal layer of the milling cutter are made of different materials, and the temperature difference on the surface of the milling cutter is large. When the milling cutter is processing the workpiece normally, the surface temperature of the milling cutter is detected by a laser temperature detector and transmitted to an external display to monitor the damage of the milling cutter; when the temperature difference on the surface of the milling cutter is large, the operation of the machine tool is automatically suspended, and the image of the milling cutter is photographed by a CCD camera visual detector. The surface damage of the tool is compared and detected by the built-in software uploaded to the external display, so that the milling cutter can be replaced when it is damaged, avoiding defective formed products due to timely replacement of the milling cutter.

[0014] 2. The laser temperature detector and the CCD camera visual detector can be converted by setting the transmission component, so that when the machine tool is operating, the laser temperature detector is aligned with the tool, while the CCD camera visual detector is facing away from the tool to avoid chips being damaged or adhering to the lens of the CCD camera visual detector.

[0015] 3. The entire detection device can be more conveniently connected to the milling cutter assembly main shaft disk through the setting of the assembly bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a tool breakage detection device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a detection device for a tool breakage detection device according to an embodiment of the present invention;

[0019] Figure 3 1 is a schematic cross-sectional structural diagram of a detection component of a tool breakage detection device according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic cross-sectional view of an air transmission ring assembly of a tool breakage detection device according to an embodiment of the present invention;

[0021] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of A;

[0022] Figure 61 is a schematic structural diagram of a driving component of a tool breakage detection device according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic structural diagram of an assembly stand for a tool breakage detection device according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the main shaft disc structure of a milling cutter assembly of a CNC machine tool according to an embodiment of the present invention;

[0025] Icons: assembly frame 1, transmission assembly 2, detection assembly 3, air transmission ring assembly 4, welding ring 5, shaft disc 6, ring pad 11, assembly ring 12, bent connecting rod 13, arc plate 14, first threaded hole 15, locking stud 16, fixing rod 21, driving part 22, driving wheel 23, driven wheel 24, belt ring 25, box body 31, laser temperature detector 32, CCD camera visual detector 33, connecting rod 34, heat dissipation fin 35, thermal conductive silicon 36, thin welding plate 37, sealing cavity cover 38, ring body 41, ring box 42, air guide ring box 43, filter element 44, mosaic round block 45, cotton core 46, arc groove 61, second threaded hole 62, adjustment motor 221. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Example

[0028] Combine Figures 1 to 8 As shown, this embodiment provides a tool breakage detection device, comprising an assembly frame 1, and a plurality of detection devices connected to the assembly frame 1; the detection devices comprise a transmission component 2 and a detection component 3;

[0029] The transmission assembly 2 includes a plurality of fixed rods 21, a driving member 22, a driving wheel 23, a plurality of driven wheels 24, and a belt loop 25; one end of the fixed rod 21 is connected to the assembly frame 1, and the driving member 22 is provided on one of the fixed rods 21 for driving the driving wheel 23 connected to the other end of the fixed rod 21; the other ends of the other fixed rods 21 are connected to the driven wheels 24; the belt loop 25 is sleeved on the driving wheel 23 and the driven wheels 24;

[0030] The detection assembly 3 includes a box body 31 , and a laser temperature detector 32 and a CCD camera visual detector 33 placed on both sides of the box body 31 ; the box body 31 is connected to the driving wheel 23 and / or the driven wheel 24 via a connecting rod 34 .

[0031] Specifically, in this embodiment, Figure 2 and Figure 3 As shown, it includes two detection components 3, one of which is connected to the bottom of the driving wheel 23 through a connecting rod 34, and the other is connected to the bottom of one of the driven wheels 24 through a connecting rod 34; the driving member 22 is a small adjusting motor 221, which drives the driving wheel 23 to rotate when it rotates, thereby driving the detection component 3 to rotate, and at the same time drives the driven wheel 24 to rotate through the transmission of the belt ring 25, thereby synchronously driving the other detection component 3 to rotate; the laser temperature detector 32 and the CCD camera visual detector 33 in the two detection components 3 are switched to realize the switching of the laser temperature detector 32 or the CCD camera visual detector 33 so that the laser temperature detector 32 or the CCD camera visual detector 33 is aligned with the tool.

[0032] Two chambers are formed in the box body 31, which are respectively used to install the laser temperature detector 32 and the CCD camera visual detector 33; hardened thermal conductive silicone 36 glue and heat dissipation fins 35 are provided in the chamber, and the heat dissipation fins 35 are in contact with the wall surface of the laser temperature detector 32 and the wall surface of the CCD camera visual detector 33; a thin welding plate 37 is provided on the outside of the chamber for installing the CCD camera visual detector 33, which is used to fix the CCD camera visual detector 33; a cavity cover 38 is provided on the outside of the thin welding plate 37; the thermal conductive silicone 36 glue and the heat dissipation fins 35 are used to dissipate heat for the packaged electronic components of the CCD camera visual detector 33 and the laser temperature detector 32 arranged in the chamber.

[0033] In this embodiment, if Figure 1 、 Figure 4 and Figure 5As shown, it also includes an air supply ring assembly 4, which is connected to the assembly frame 1 through a welding ring 5; the detection device is connected to the air supply ring assembly 4; the air supply ring assembly 4 is used to connect to an external air source and blow air to the tool. The air supply ring assembly 4 includes a ring body 41, a ring box 42 connected to the inner wall of the ring body 41, and an air guide ring box 43 connected to the inner side of the ring box 42; the ring body 41 is provided with a connecting hole for connecting to an external air source; the ring box 42 is connected to the air guide ring box 43; a filter element 44 is provided in the ring box 42; a plurality of interlocking circular blocks 45 are provided on the inner side of the air guide ring box 43, and air holes are provided on the interlocking circular blocks 45; a cotton core 46 is provided in the air hole; the inner side surface of the air guide ring box 43 is set at 60-68 degrees; the filter element 44 is used to filter particulate matter in the gas to avoid collision with the tool; the cotton core 46 is used to blow the gas out evenly.

[0034] In the initial state of the detection component 3 or when the machine tool is working, the laser temperature detector 32 is aligned with the tool. Since the surface of the milling cutter is usually plated with a carbide layer, when the surface of the milling cutter is damaged or worn, the carbide layer and the internal metal layer of the milling cutter are made of different materials, and the temperature difference on the surface of the milling cutter is large. When the milling cutter is processing the workpiece normally, the surface temperature of the milling cutter is detected by the laser temperature detector 32 and transmitted to the external display screen. The air supply ring component 4 discharges pressurized air to the surface of the milling cutter through an external air source to cool the milling cutter and increase the service life of the milling cutter. At the same time, it can blow away the debris and impurities adhering to the surface of the milling cutter to avoid Debris and impurities interfere with the temperature detection of the milling cutter by the laser temperature detector 32; when the surface of the milling cutter is damaged and the laser temperature detector 32 detects a large temperature difference, the operation of the machine tool is automatically suspended, and at the same time the small adjustment motor 221 rotates, and the two detection components 3 are rotated synchronously through the transmission of the driving wheel 23, the belt ring 25 and the driven wheel 24, so that the CCD camera visual detector 33 is aligned with the milling cutter and an image is taken. The surface damage of the tool is compared and detected by the built-in software uploaded to the external display, so that the milling cutter can be replaced in time to avoid defective molded products due to failure to replace the milling cutter in time.

[0035] Furthermore, if Figure 7 and Figure 8As shown, the assembly stand 1 includes an annular plate 11, an assembly ring 12 disposed on the top of the annular plate 11, a plurality of bent connecting rods 13 connected between the annular plate 11 and the assembly ring 12, and a plurality of arc pieces 14 connected to the inner side of the assembly ring 12 via a support rod; a first threaded hole 15 is formed on the arc piece 14; a locking stud 16 is disposed outside the first threaded hole 15; the arc piece 14 is used to connect to the arc groove 61 at the top of the milling cutter assembly body shaft disk 6 and is locked by the locking stud 16. A second threaded hole 62 is disposed on the outer side of the shaft disk 6, which is opposite to the first threaded hole 15; the assembly stand 1 can be quickly fixed by directly inserting the arc piece 14 into and out of the arc groove 61 and connecting the first threaded hole 15 and the second threaded hole 62 via the locking stud 16. This method is convenient and quick.

[0036] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0037] 1. Since the surface of the milling cutter is usually coated with a carbide layer, when the surface of the milling cutter is damaged or worn, the carbide layer and the internal metal layer of the milling cutter are made of different materials, and the temperature difference on the surface of the milling cutter is large. When the milling cutter is processing the workpiece normally, the surface temperature of the milling cutter is detected by the laser temperature detector 32 and transmitted to the external display to monitor the damage of the milling cutter; when the temperature difference on the surface of the milling cutter is large, the operation of the machine tool is automatically suspended, and the image of the milling cutter is photographed by the CCD camera visual detector 33. The surface damage of the tool is compared and detected by the built-in software uploaded to the external display, so that the milling cutter can be replaced when it is damaged, avoiding defective molded products due to timely replacement of the milling cutter.

[0038] 2. The laser temperature detector 32 and the CCD camera visual detector 33 can be switched by the setting of the transmission component 2, so that when the machine tool is operating, the laser temperature detector 32 is aligned with the tool, while the CCD camera visual detector 33 is facing away from the tool, to prevent chips from being damaged or adhering to the lens of the CCD camera visual detector 33.

[0039] 3. The installation of the assembly frame 1 allows the entire detection device to be more conveniently and detachably connected to the milling cutter assembly main body shaft disc 6.

[0040] The present invention further provides a numerically controlled machine tool comprising the aforementioned tool breakage detection device, which is connected to the milling cutter assembly main body shaft disc 6. The tool breakage detection device can be directly welded to the milling cutter assembly main body shaft disc 6, or can be fast and detachably fixedly connected via the arc piece 14 on the assembly frame 1 and the arc groove 61 on the milling cutter assembly main body shaft disc 6.

[0041] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0044] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

Claims

1. A tool breakage detection device, characterized in that: It includes an assembly frame and a plurality of detection devices connected under the assembly frame; the detection devices include a transmission component and a detection component; The transmission assembly includes a plurality of fixed rods, a driving member, a driving wheel, a plurality of driven wheels, and a belt loop; one end of the fixed rod is connected to the assembly frame, and the driving member is provided on one of the fixed rods for driving the driving wheel connected to the other end of the fixed rod; the other end of the other fixed rod is connected to the driven wheel; the belt loop is sleeved on the driving wheel and the driven wheel; The detection assembly includes a box body, and a laser temperature detector and a CCD camera visual detector placed on both sides of the box body; the box body is connected to the driving wheel and / or the driven wheel through a connecting rod; Two chambers are formed in the box body, one for mounting the laser temperature detector and the other for mounting the CCD camera visual detector; hardened thermal conductive silicone and heat dissipation fins are provided in the chamber, and the heat dissipation fins are in contact with the wall surface of the laser temperature detector and the wall surface of the CCD camera visual detector; a thin welding plate is provided on the outside of the chamber for mounting the CCD camera visual detector, for fixing the CCD camera visual detector; a cavity cover is provided on the outside of the thin welding plate; The assembly frame includes a ring plate, an assembly ring arranged on the top of the ring plate, a plurality of bent connecting rods connected between the ring plate and the assembly ring, and a plurality of arc pieces connected to the inner side of the assembly ring through support rods; a first threaded hole is opened on the arc piece; a locking stud is arranged on the outer side of the first threaded hole; the arc piece is used to connect to the arc groove on the top of the milling cutter assembly body shaft disk, and is locked by the locking stud.

2. The tool breakage detection device according to claim 1, characterized in that: It also includes an air transmission ring assembly, which is connected to the assembly frame; the detection device is connected to the air transmission ring assembly; the air transmission ring assembly is used to connect to an external air source and blow air to the tool.

3. The tool breakage detection device according to claim 2, characterized in that: The air transmission ring assembly includes a ring body, a ring box connected to the inner wall of the ring body, and an air guide ring box connected to the inner side of the ring box; a connecting hole is provided on the ring body for connecting to an external air source; the ring box is connected to the air guide ring box; a filter element is provided in the ring box; a plurality of air holes are provided on the inner side of the air guide ring box; and a cotton core is provided in the air holes.

4. The tool breakage detection device according to claim 1, wherein: The initial state of the detection component is that the laser temperature measuring detector is aligned with the cutting tool.

5. A CNC machine tool, characterized in that: It comprises a tool breakage detection device as described in any one of claims 1 to 4, which is connected to the shaft disc of the milling cutter assembly body.

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