Machine tool and method for detecting the dimensions of a workpiece without stopping the machine

Abstract

A machine tool for detecting workpiece size without stopping and a detection method, comprising a machine tool shell, a machine head for installing a chuck, an automatic workpiece feeding device and a tool rest device in the machine tool shell, the tool rest device comprising a motor-driven carriage, the carriage being provided with a tool rest and an automatic detection device; the automatic detection device comprising a detection tool, the detection tool being connected to a rotating shaft, the rotating shaft being connected to a sensor through a connecting rod device, the sensor outputting different rotating forces to the rotating shaft through induction, and the machine tool displaying the detection result. The machine tool for detecting workpiece size without stopping comprises the tool rest and the automatic detection device installed on the carriage, the cutting of the workpiece is completed by the tool on the tool rest, and then the automatic detection device detects the size of each workpiece, so that each workpiece completes the size detection on the machine tool, the additional detection equipment and the secondary detection work are reduced, and the workpiece processing efficiency and the product yield are improved.

Description

Technical Field

[0001] This invention relates to machine tool cutting tools for machining hole-type or threaded hole-type workpieces, workpiece size detection devices and methods, and particularly to methods for detecting workpiece size without stopping the machine and methods for tool wear alarms. Background Technology

[0002] Currently, after machining holes or threaded holes on a workpiece, other equipment or expensive visual inspection is required to check whether its dimensions meet the requirements. Most existing methods rely on other equipment for workpiece inspection, lacking the machine tool's own inspection devices or structures. How to achieve workpiece dimensional inspection and tool wear alarm without stopping the machine is a research topic for those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a machine tool and detection method for non-stop workpiece dimension detection, which can monitor the workpiece's machining dimension status in real time, promptly detect tool wear or damage, thereby improving production efficiency and machining accuracy.

[0004] To achieve the above objectives, this invention provides a machine tool and method for non-stop workpiece dimension inspection. The machine tool includes a machine head housing, within which are mounted a chuck, an automatic workpiece feeding device, and a tool post device. The tool post device includes a motor-driven slide, on which a tool post and an automatic inspection device are mounted. The automatic inspection device includes an inspection tool connected to a rotating shaft, which is connected to a sensor via a linkage. The sensor senses the difference in rotational force output by the inspection tool to the rotating shaft and controls the machine tool to display the inspection result. The inspection tool includes one or more of a go gauge, a thread plug gauge, a reamer, and a tap. This non-stop workpiece dimension inspection machine tool, through the tool post mounted on the slide and the automatic inspection device, allows the tool on the tool post to cut the workpiece, and then the automatic inspection device to inspect the dimensions of each workpiece. This allows each workpiece to complete dimension inspection on the machine tool, reducing additional inspection equipment and secondary inspection work, improving workpiece processing efficiency and product yield. The wear of the cutting tool is indirectly reflected by the workpiece size detection of each workpiece by the automatic detection device. As long as the workpiece is within the specified size range, it means that the cutting tool is within the normal range. Once the detection alarm occurs, it means that the cutting tool is worn too much and needs to be replaced. Timely detection of tool wear can prevent a batch of unqualified products.

[0005] The automatic detection device includes a threaded hole automatic detection device, which comprises a first rotating shaft connected to a tap or thread plug gauge. The first rotating shaft is connected to a first connecting rod assembly, which includes a first swing arm connected to the first rotating shaft. The first swing arm is connected to one end of a first spring via a first screw, and the other end of the first spring is connected to a second screw. The second screw is connected to a spring adjustment bracket, which is connected to a first housing. The first swing arm engages with the sensing rod of a first sensor. The threaded hole automatic detection device uses a tap or thread plug gauge to engage with the threaded hole on the workpiece. The tap not only performs secondary thread machining to clean residual cutting powder, but also, by measuring the magnitude of the rotational force on the first swing arm, the first sensor determines whether the threaded hole meets technical requirements, achieving the technical objective of detecting workpiece dimensions without stopping the machine.

[0006] The elastic adjustment bracket has two or more first adjustment holes. These first adjustment holes cooperate with a second screw. By adjusting the distance between the first adjustment hole and the first spring, different sensing cutting forces are required for threads of different diameters, thus addressing the adaptability of the automatic detection device to different threaded holes. The sensing rod is a spring rod, preventing damage during contact and extending the sensor's lifespan and reliability. The first sensor is connected to a first connecting rod via a first connecting post. The first connecting rod connects to the elastic adjustment bracket or the first housing. The first connecting rod and the sensing rod are parallel to each other, and the distance between them defines the swing range of the first swing arm. Adjusting the distance between the first connecting rod and the sensing rod allows for adjustment of the detection range of the automatic threaded hole detection device.

[0007] A first bushing is fitted into the middle of the first rotating shaft, and rubber pads are fitted at both ends of the first bushing. The rubber pad structure prevents damage to the workpiece caused by impact between the tap or thread plug gauge. A positioning screw is connected to the outer periphery of the first bushing. The positioning screw connects the first housing and the first rotating shaft. The positioning screw structure can limit the position of the first rotating shaft to a certain extent and prevent the first rotating shaft from deflecting unexpectedly.

[0008] The first rotating shaft has a reduced diameter shaft end at one end, and a second spring is sleeved on the outer circumference of the reduced diameter shaft end to provide spring force for the rotation and reset of the first rotating shaft, thereby improving the stability of the rotation of the first rotating shaft.

[0009] The automatic detection device includes an automatic circular hole diameter detection device. This device comprises a second rotating shaft connected to a go gauge, which in turn connects to a second linkage device. The second linkage device includes a disk connected to the second rotating shaft, with a second elastic rod connected to the side of the disk. This elastic rod is connected to a second sensor. The automatic circular hole diameter detection device uses a go gauge to work with a circular hole on the workpiece. The go gauge not only cleans the cutting powder inside the hole but also, by measuring the magnitude of the rotational force on the second elastic rod, uses the second sensor to determine whether the hole meets technical requirements, thus achieving the technical objective of detecting workpiece dimensions without stopping the machine.

[0010] The second rotating shaft is provided with a second rubber pad and a second housing on its outer periphery. The protective cover of the second linkage device is connected to the side of the second housing. The rod of the second elastic rod is a third spring. The second sensor is sleeved on the outer periphery of the third spring. The rotational force of the third spring under different forces determines whether the second sensor triggers the machine tool to generate an alarm. It not only detects the diameter of the circular hole, but also automatically judges the status of the cutting tool.

[0011] The automatic detection device includes an automatic hole enlargement detection device, which comprises a third rotating shaft connected to a reamer, a third connecting rod device, and a third swing arm connected to the third rotating shaft. The third swing arm is connected to one end of a fourth spring via a third screw, the other end of the fourth spring is connected to the fourth screw, the fourth screw is connected to a first elastic force adjustment bracket, and the first elastic force adjustment bracket is connected to a third housing. The third swing arm engages with the first sensing rod of a third sensor. The automatic hole enlargement detection device uses a reamer to work on a circular hole in the workpiece. The reamer not only enlarges the hole a second time to remove residual cutting powder, but also allows the third sensor to determine whether the hole meets technical requirements based on the magnitude of the rotational force on the third swing arm, achieving the technical objective of detecting workpiece dimensions without stopping the machine.

[0012] The first elastic adjustment bracket is provided with two or more second adjustment holes. The second adjustment holes cooperate with the fourth screw. By adjusting the different distances between the second adjustment holes and the fourth spring, the different sensing cutting forces required for enlarging different round holes can be adjusted, thereby solving the problem of the automatic detection device's adaptability to different round holes. The first sensing rod is a spring rod, which avoids damage to the first sensing rod during contact, extends the service life of the sensor and improves the reliability of sensing. The third sensor is connected to the second connecting rod through the second connecting post. The second connecting rod is connected to the first elastic adjustment bracket or to the third housing. The second connecting rod and the first sensing rod are parallel to each other. The distance between the first sensing rod and the second connecting rod is the swing range of the third swing arm. The ability to adjust the detection range of the automatic round hole detection device is achieved by adjusting the distance between the second connecting rod and the first sensing rod.

[0013] The third rotating shaft is fitted with a second bushing in the middle, and the front and rear ends of the second bushing are fitted with second rubber pads. The second rubber pad structure prevents damage to the workpiece caused by the reamer impacting the workpiece. A second positioning screw is connected to the outer periphery of the second bushing. The second positioning screw connects the third housing and the third rotating shaft. The second positioning screw structure can limit the position of the second rotating shaft to a certain extent, preventing the second rotating shaft from deflecting unexpectedly.

[0014] A method for detecting the dimensions of a workpiece without shutting down the machine, the method comprising the following steps:

[0015] Step 1: The workpiece is machined with threaded holes or round holes using cutting tools on the tool holder;

[0016] Step 2: For the machined threaded holes, use an automatic threaded hole detection device. With a tap or thread plug gauge, the threaded hole meets the design requirements. When the threaded hole meets the design requirements, the first shaft drives the first swing arm to rotate, but the rotation angle does not trigger the sensing rod of the first sensor. When the threaded hole is too small, the first shaft drives the first swing arm to rotate, triggering the sensing rod of the first sensor. The machine tool displays the detection result and alarms. At this time, it indicates that the cutting tool is worn or damaged and needs to be replaced.

[0017] For the machined round holes, only the hole diameter is detected. An automatic hole diameter detection device is used. The round hole is matched with a go gauge. When the round hole meets the design requirements, the rotation angle of the second elastic rod connected to the side of the second rotating shaft drive disk is insufficient to trigger the second sensor. When the round hole is too small, the rotation of the second elastic rod connected to the side of the second rotating shaft drive disk triggers the second sensor. The machine tool displays the detection result and alarms. At this time, it indicates that the cutting tool is worn or damaged and needs to be replaced.

[0018] When a machined round hole needs to be enlarged and its diameter automatically detected, the automatic enlargement detection device uses a reamer to work with the round hole. When the round hole meets the design requirements, the reamer drives the third rotating shaft to rotate, but the rotation angle does not trigger the first sensing rod of the third sensor. Of course, it is also possible that the round hole is too large and the reamer is too small to trigger rotation. Only when the round hole is too small does the reamer drive the third rotating shaft and the third swing arm to rotate, triggering the first sensing rod of the third sensor. The machine tool displays the detection result and alarms. At this time, it indicates that the cutting tool is worn or damaged and needs to be replaced.

[0019] By adopting the above technical solution, this machine tool and inspection method for non-stop workpiece dimension inspection utilizes a tool holder mounted on a slide and an automatic inspection device. The tool on the tool holder cuts the workpiece, and then the automatic inspection device inspects the dimensions of each workpiece. This allows each workpiece to undergo dimension inspection on the machine tool, reducing additional inspection equipment and secondary inspection work, thereby improving workpiece processing efficiency and product yield. The automatic inspection device indirectly reflects the wear condition of the cutting tool by detecting the dimensions of each workpiece. As long as the workpiece is within the specified size range, it indicates that the cutting tool is within the normal range. Once an alarm is triggered, it indicates that the cutting tool is excessively worn and needs to be replaced, allowing for timely detection of tool wear and preventing batches of defective products. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a three-dimensional structural schematic diagram of a machine tool for detecting workpiece dimensions without stopping operation according to the present invention;

[0022] Figure 2 is a three-dimensional structural diagram of a machine tool for detecting workpiece dimensions without stopping the machine, according to the present invention, which is equipped with an automatic detection device for the diameter of a circular hole.

[0023] Figure 3 is a three-dimensional structural diagram of a machine tool for detecting workpiece dimensions without stopping the machine, according to the present invention, which is equipped with an automatic thread hole detection device.

[0024] Figure 4 is a three-dimensional structural diagram of the automatic thread hole detection device of the present invention;

[0025] Figure 5 is a schematic diagram of the internal three-dimensional structure of the automatic thread hole detection device of the present invention;

[0026] Figure 6 is a schematic diagram of the tap installation structure of the automatic thread hole detection device in this invention;

[0027] Figure 7 is a schematic diagram of the first rotating shaft mounting structure of the automatic thread hole detection device of the present invention;

[0028] Figure 8 is a three-dimensional structural schematic diagram of the automatic hole expansion detection device in this invention;

[0029] Figure 9 is a schematic diagram of the internal three-dimensional structure of the automatic hole expansion detection device in this invention;

[0030] Figure 10 is a schematic diagram of the reamer mounting structure of the automatic hole reaming detection device of the present invention;

[0031] Figure 11 is a schematic diagram of the third rotating shaft mounting structure of the automatic hole enlargement detection device in this invention;

[0032] Figure 12 is a three-dimensional structural diagram of the automatic hole diameter detection device in this invention;

[0033] Figure 13 is a schematic diagram of the internal three-dimensional structure of the automatic hole diameter detection device in this invention;

[0034] Figure 14 is a three-dimensional structural diagram of the automatic workpiece feeding device in this invention;

[0035] Figure 15 is a three-dimensional structural diagram of the workpiece holder in the automatic workpiece feeding device of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0037] like Figure 1-15 As shown, a machine tool and method for non-stop workpiece dimension inspection include a machine tool housing 1, a machine head 5 for mounting a chuck 3, an automatic feeding device 2 for a workpiece 66, and a tool post device 4. The tool post device 4 includes a slide 6 driven by a motor 8, on which a tool post 84 and an automatic inspection device are mounted. The automatic inspection device includes an inspection tool connected to a rotating shaft, which is connected to a sensor via a linkage device. The sensor senses the difference in rotational force output by the inspection tool to the rotating shaft and controls the machine tool to display the inspection result. The inspection tool includes one or more of a go gauge, a thread plug gauge, a reamer, and a tap.

[0038] The preferred automatic detection device includes a threaded hole automatic detection device 9. The threaded hole automatic detection device 9 includes a first rotating shaft 25 connected to a tap 11 or a thread plug gauge. The first rotating shaft 25 is connected to a first connecting rod device. The first connecting rod device includes a first swing arm 18 connected to the first rotating shaft 25. The first swing arm 18 is connected to one end of a first spring 17 via a first screw 20. The other end of the first spring 17 is connected to a second screw 15. The second screw 15 is connected to a spring adjustment bracket 14. The spring adjustment bracket 14 is connected to a first housing 10. The first swing arm 18 engages with the sensing rod 22 of the first sensor 21.

[0039] The elastic adjustment bracket 14 is provided with two or more first adjustment holes 13, which are matched with the second screw 15; the sensing rod 22 is a spring rod; the first sensor 21 is connected to the first connecting rod 16 through the first connecting post 19, and the first connecting rod 16 is connected to the elastic adjustment bracket 14 or to the first housing 10. The first connecting rod 16 and the sensing rod 22 are parallel to each other, and the distance between the first connecting rod 16 and the sensing rod 22 is the swing range of the first swing arm 18.

[0040] The first shaft 25 is fitted with a first bushing 24 in the middle. The first bushing 24 is fitted with rubber pads 23 at both ends. The first bushing 24 is connected to a positioning screw 12 on its outer periphery. The positioning screw 12 connects the first housing 10 and the first shaft 25. One end of the first shaft 25 is provided with a reduced diameter shaft end 27. The second spring 26 is fitted to the outer periphery of the reduced diameter shaft end 27.

[0041] The preferred automatic detection device includes a circular hole diameter automatic detection device 7. The circular hole diameter automatic detection device 7 includes a second rotating shaft 54 ​​connected to a gauge 50. The second rotating shaft 54 ​​is connected to a second linkage device. The second linkage device includes a disk 58 connected to the second rotating shaft 54. A second elastic rod 55 is connected to the side of the disk 58. The second elastic rod 55 is connected to a second sensor 56.

[0042] The second rotating shaft 54 ​​is provided with a second rubber pad 53 and a second housing 51 on its outer periphery. The protective cover 52 of the second linkage device is connected to the side of the second housing 51. The rod body of the second elastic rod 55 is a third spring 57, and the second sensor 56 is sleeved on the outer periphery of the third spring 57.

[0043] The preferred automatic detection device includes an automatic hole enlargement detection device 30. The automatic hole enlargement detection device 30 includes a third rotating shaft 44 connected to a reamer 28. The third rotating shaft 44 is connected to a third linkage device. The third linkage device includes a third swing arm 41 connected to the third rotating shaft 44. The third swing arm 41 is connected to one end of a fourth spring 35 via a third screw 38. The other end of the fourth spring 35 is connected to the fourth screw 34. The fourth screw 34 is connected to a first elastic force adjustment bracket 32. The first elastic force adjustment bracket 32 ​​is connected to a third housing 31. The third swing arm 41 engages with the first sensing rod 40 of the third sensor 39.

[0044] The first elastic adjustment bracket 32 ​​is provided with two or more second adjustment holes 33, which are matched with the fourth screw 34; the first sensing rod 40 is a spring rod; the third sensor 39 is connected to the second connecting rod 36 through the second connecting post 37, and the second connecting rod 36 is connected to the first elastic adjustment bracket 32 ​​or to the third housing 31. The second connecting rod 36 and the first sensing rod 40 are parallel to each other, and the distance between the first sensing rod 40 and the second connecting rod 36 is the swing range of the third swing arm 41.

[0045] The third rotating shaft 44 is fitted with a second bushing 43 in the middle. The front and rear ends of the second bushing 43 are fitted with second rubber pads 42. The outer periphery of the second bushing 43 is connected to a second positioning screw 29. The second positioning screw 29 connects the third housing 31 and the third rotating shaft 44.

[0046] A method for detecting workpiece dimensions without shutting down the machine includes the following steps:

[0047] Step 1: The workpiece 66 is machined into a threaded hole or a round hole by the cutting tool on the tool holder 84;

[0048] Step 2: For the machined threaded hole, use the automatic threaded hole detection device 9 to connect the threaded hole with the tap 11 or thread plug gauge. When the threaded hole meets the design requirements, the first rotating shaft 25 drives the first swing arm 18 to rotate, but the rotation angle does not trigger the sensing rod 22 of the first sensor 21. When the threaded hole is too small, the first rotating shaft 25 drives the first swing arm 18 to rotate, triggering the sensing rod 22 of the first sensor 21. The machine tool displays the detection result and alarms. At this time, it indicates that the cutting tool is worn or damaged and needs to be replaced.

[0049] For the machined round hole, only the hole diameter is detected. The automatic hole diameter detection device 7 is used. The gauge 50 is matched with the round hole. When the round hole meets the design requirements, the second rotating shaft 54 ​​drives the second elastic rod 55 connected to the side of the disk 58 to rotate. The rotation angle is insufficient to trigger the second sensor 56. When the round hole is too small, the second rotating shaft 54 ​​drives the second elastic rod 55 connected to the side of the disk 58 to rotate and trigger the second sensor 56. The machine tool displays the detection result and alarms. At this time, it means that the cutting tool has been worn or damaged and needs to be replaced.

[0050] When a machined round hole needs to be enlarged and its diameter automatically detected, the enlargement automatic detection device 30 uses a reamer 28 to work with the round hole. When the round hole meets the design requirements, the reamer 28 drives the third rotating shaft 44 to rotate, but the rotation angle does not trigger the first sensing rod 40 of the third sensor 39. Of course, if the round hole is too large and the reamer 28 is too small, the rotation will not be triggered. Only when the round hole is too small will the reamer 28 drive the third rotating shaft 44 and the third swing arm 41 to rotate, triggering the first sensing rod 40 of the third sensor 39. The machine tool will then display the detection result and trigger an alarm. This indicates that the cutting tool is worn or damaged and needs to be replaced.

[0051] The automatic feeding device 2 for the workpiece 66, which is structurally preferred, includes a horizontal adjustment seat 62 and a vertical adjustment seat 61 connected to each other. The vertical adjustment seat 61 is connected to a vertical connecting plate 63, and the vertical connecting plate 63 is connected to a first slider 60. The first slider 60 is connected to a workpiece clamping base 64, and the workpiece clamping base 64 is connected to a vertical cylinder 72, a vertical cylinder mounting seat 71, and a workpiece clamp. The workpiece clamp includes a fixed clamping seat 65 and a rotating clamping frame 73 connected to each other. The fixed clamping seat 65 and the rotating clamping frame 73 clamp the workpiece 66, which is arranged along the guide rail groove 75. The vertical cylinder mounting seat 71 is connected to a second slider 69, which is connected to a horizontal cylinder 68. The horizontal cylinder 68 is connected to a pressing plate 67, and the cylinder push rod 70 of the horizontal cylinder 68 is connected to the workpiece clamping base 64.

[0052] The working process of the automatic feeding device 2 is as follows: the vertical cylinder 72 drives the workpiece holder to transport the workpiece 66 to the chuck 3 of the machine tool. Then, the horizontal cylinder 68 drives the pressing plate 67 through the cylinder push rod 70 to press the workpiece 66 into the chuck 3, completing the automatic clamping function of the workpiece. After that, the automatic feeding device 2 resets, and the workpiece 66 in the guide rail groove 75 automatically enters the workpiece holder. After the workpiece is processed, it reciprocates to work with the chuck 3 to achieve automated production.

[0053] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machine tool for detecting the size of a workpiece without stopping, comprising a machine tool housing (1), a machine head (5) provided with a mounting chuck (3) in the machine tool housing (1), an automatic feeding device (2) of a workpiece (66) and a tool holder device (4), characterized in that: The tool holder device (4) comprises a motor (8) driven carriage (6), the carriage (6) is provided with a tool holder (84) and an automatic detection device; the automatic detection device comprises a detection tool, the detection tool is connected with a rotating shaft, the rotating shaft is connected with a sensor through a connecting rod device, the sensor outputs different rotating forces to the rotating shaft through induction, and the machine tool displays the detection result; the detection tool comprises one or more of a go gauge, a thread plug gauge and the like; The automatic detection device comprises a threaded hole automatic detection device (9), the threaded hole automatic detection device (9) comprises a first rotating shaft (25) connected with a thread plug gauge, the first rotating shaft (25) is connected with a first connecting rod device, the first connecting rod device comprises a first swing arm (18) connected with the first rotating shaft (25), the first swing arm (18) is connected with one end of a first spring (17) through a first screw rod (20), the other end of the first spring (17) is connected with a second screw rod (15), the second screw rod (15) is connected with a spring force adjusting support (14), and the spring force adjusting support (14) is connected with a first box body (10); the first swing arm (18) is matched with an induction rod (22) of a first sensor (21); The spring force adjusting support (14) is provided with two or more than two first adjusting holes (13), and the first adjusting holes (13) are matched with the second screw rod (15); the induction rod (22) is a spring rod; the first sensor (21) is connected with a first connecting rod (16) through a first connecting column (19), the first connecting rod (16) is connected with the spring force adjusting support (14) or the first box body (10), the first connecting rod (16) and the induction rod (22) are parallel to each other, and the spacing between the first connecting rod (16) and the induction rod (22) is the swing interval of the first swing arm (18); The first rotating shaft (25) is sleeved with a first shaft sleeve (24) in the middle, the first shaft sleeve (24) is sleeved with rubber pads (23) at the front and rear ends, the first shaft sleeve (24) is connected with a positioning screw rod (12) outside the periphery, the positioning screw rod (12) is connected with the first box body (10) and the first rotating shaft (25), and one end of the first rotating shaft (25) is provided with a reduced diameter shaft end (27), and the reduced diameter shaft end (27) is sleeved with a second spring (26) outside the periphery.

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