Machine tool capable of detecting size of threaded hole of workpiece without shutdown

Abstract

A machine tool capable of detecting the size of a threaded hole of a workpiece without shutdown comprises a machine tool shell, a machine head provided with a chuck, an automatic workpiece feeding device and a tool rest device are arranged in the machine tool shell, the tool rest device comprises a dragging plate driven by a motor, and the dragging plate is provided with a tool rest 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 controls a machine tool to display a detection result by sensing the difference of rotating force output by the detection tool to the rotating shaft, and the detection tool comprises one of a thread plug gauge and a screw tap. According to the machine tool capable of detecting the sizes of the threaded holes of the workpieces without shutdown, the tool rest and the automatic detection device are installed on the carriage, cutting of the workpieces is completed through the tool on the tool rest, and then the sizes of the threaded holes of all the workpieces are detected through the automatic detection device.

Description

Technical Field

[0001] The utility model relates to a machine tool cutter for workpieces with threaded holes, a detection device and method for the sizes of workpiece threaded holes, in particular to a method for detecting the sizes of workpiece threaded holes without stopping the machine and a method for alarming tool wear. Background Art

[0002] At present, after the threaded holes of workpieces are machined, other equipment or expensive vision detection is required to complete the detection of whether the threaded sizes meet the requirements. Most of the existing methods use other equipment to complete workpiece detection, lacking the detection device or structure of the machine tool itself. How to achieve the detection of the sizes of workpiece threaded holes and tool wear alarm without stopping the machine is the research object of those skilled in the art. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a machine tool for detecting the sizes of workpiece threaded holes without stopping the machine aiming at the defects and deficiencies of the prior art, which can monitor the machining size state of the workpiece threaded holes in real time, and timely detect the wear or damage of the cutting tool for the threaded holes, so as to improve the production efficiency and machining accuracy.

[0004] To achieve the above purpose, the utility model provides a machine tool for detecting the sizes of workpiece threaded holes without stopping the machine, which includes a machine tool housing, a machine head for installing a chuck, an automatic feeding device for workpieces and a tool rest device arranged inside the machine tool housing. The tool rest device includes a carriage driven by a motor, and a tool rest and an automatic detection device are installed on the carriage. The automatic detection device includes a detection tool, the detection tool is connected to a rotating shaft, the rotating shaft is connected to a sensor through a connecting rod device, and the sensor controls the machine tool to display the detection result by sensing the different rotational forces output by the detection tool to the rotating shaft. The detection tool includes one of a thread plug gauge and a tap. The machine tool for detecting the sizes of workpiece threaded holes without stopping the machine of the utility model, through 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 sizes of the workpiece threaded holes of each workpiece are detected by the automatic detection device, so that the size detection of the threaded holes of each workpiece is completed on the machine tool, reducing additional detection equipment and secondary detection work, improving the workpiece processing efficiency and product qualification rate. By detecting the sizes of the workpiece threaded holes of each workpiece through the automatic detection device, the wear condition of the thread cutting tool is indirectly reflected. As long as the size of the workpiece threaded hole is within the specified size range, it means that the cutting tool is in the normal range. Once a detection alarm appears, it means that the cutting tool is excessively worn and needs to be replaced, timely detecting the tool wear condition and avoiding the occurrence of a batch of unqualified products.

[0005] The automatic detection device includes a thread hole automatic detection device. The thread hole automatic detection device includes a first rotating shaft connected to a tap or a thread plug gauge. The first rotating shaft is connected to a first link device. The first link device includes a first swing arm connected to the first rotating shaft. The first swing arm is connected to one end of a first spring through a first screw. The other end of the first spring is connected to a second screw. The second screw is connected to an elastic force adjusting bracket. The elastic force adjusting bracket is connected to a first box body. The first swing arm cooperates with and contacts the sensing rod of a first sensor. The thread hole automatic detection device cooperates with the thread hole on the workpiece through a tap or a thread plug gauge. The tap can not only reprocess the thread to clean the cutting powder remaining on the thread, but also judge whether the thread hole meets the technical requirements through the magnitude of the rotational force received by the first swing arm by the first sensor, achieving the technical purpose of detecting the size of the workpiece thread hole without stopping the machine.

[0006] The elastic force adjusting bracket is provided with more than two first adjusting holes. The first adjusting holes cooperate with the second screw. By adjusting the different connection distances between the first adjusting holes and the first spring, the adjustment of different induction cutting forces required for different aperture threads can be realized, so as to solve the adaptability detection performance of the automatic detection device for different thread holes. The sensing rod is a spring rod, which can avoid damage to the sensing rod during the contact process, extend the service life of the sensor and the reliability of induction. The first sensor is connected to a first connecting rod through a first connecting column. The first connecting rod is connected to the elastic force adjusting bracket or the first box body. The first connecting rod is parallel to the sensing rod. The distance between the first connecting rod and the sensing rod is the swing range of the first swing arm. By adjusting the distance between the first connecting rod and the sensing rod, the detection range adjustment ability of the thread hole automatic detection device can be realized.

[0007] A first shaft sleeve is sleeved in the middle of the first rotating shaft. Rubber pads are sleeved at both the front and rear ends of the first shaft sleeve. The rubber pad structure avoids damage to the workpiece caused by the impact of the tap or the thread plug gauge on the workpiece. A positioning screw is connected to the outer periphery of the first shaft sleeve. The positioning screw is connected to the first box body and the first rotating shaft. The positioning screw structure can limit the position of the first rotating shaft to avoid accidental deflection of the first rotating shaft.

[0008] One end of the first rotating shaft is provided with a reduced-diameter shaft end. A second spring is sleeved on the outer periphery of the reduced-diameter shaft end, providing spring force for the rotation and reset of the first rotating shaft and improving the rotation stability of the first rotating shaft.

[0009] A detection method for detecting the size of the workpiece thread hole without stopping the machine. The detection method includes the following steps:

[0010] Step 1: The workpiece processes a thread hole through the cutting tool on the tool rest.

[0011] Step 2: For the machined threaded holes, select a threaded hole automatic detection device to cooperate with the threaded holes through taps or thread gauges. When the threaded holes meet the design requirements, the first rotating 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 holes are too small, the first rotating shaft drives the first swing arm to rotate and trigger the sensing rod of the first sensor, and the machine tool displays the detection result for alarm processing. At this time, it indicates that the cutting tool has been worn or damaged and needs to be replaced.

[0012] Adopting the above technical solution, this kind of machine tool for detecting the size of workpiece threaded holes without stopping the machine is equipped with a tool rest installed on the carriage and an automatic detection device. The cutting of the workpiece threaded holes is completed by the cutting tool on the tool rest, and then the size of the workpiece threaded holes of each workpiece is detected by the automatic detection device. This enables the size detection of the threaded holes to be completed on the machine tool for each workpiece, reducing additional detection equipment and secondary detection work, and improving the processing efficiency of the workpiece and the product qualification rate. Detecting the size of the workpiece threaded holes of each workpiece by the automatic detection device indirectly reflects the wear condition of the cutting tool. As long as the workpiece is within the specified size range, it indicates that the cutting tool is in the normal range. Once a detection alarm occurs, it means that the cutting tool is worn out and needs to be replaced, promptly discovering the wear condition of the tool and avoiding the occurrence of a batch of unqualified products. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 is a three-dimensional structural schematic diagram of a machine tool for detecting the size of workpiece threaded holes without stopping the machine according to the present invention;

[0015] Figure 2 is a three-dimensional structural schematic diagram of a machine tool for detecting the size of workpiece threaded holes without stopping the machine with a threaded hole automatic detection device installed according to the present invention;

[0016] Figure 3 is a three-dimensional structural schematic diagram of the threaded hole automatic detection device according to the present invention;

[0017] Figure 4 is a three-dimensional internal structural schematic diagram of the threaded hole automatic detection device according to the present invention;

[0018] Figure 5 is a schematic diagram of the tap installation structure of the threaded hole automatic detection device according to the present invention;

[0019] Figure 6 is a schematic diagram of the first rotating shaft installation structure of the threaded hole automatic detection device according to the present invention;

[0020] Figure 7 is a schematic three-dimensional structure diagram of the automatic workpiece loading device in the present utility model;

[0021] Figure 8 is a schematic three-dimensional structure diagram of the workpiece gripper in the automatic workpiece loading device of the present utility model. Detailed implementation manners

[0022] Next, in combination with the drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1-8 shown, a machine tool for detecting the size of a workpiece threaded hole without stopping the machine includes a machine tool housing 1. Inside the machine tool housing 1, there are a machine head 5 for installing a chuck 3, an automatic workpiece loading device 2 for a workpiece 66, and a tool rest device 4. The tool rest device 4 includes a carriage 6 driven by a motor 8. The carriage 6 is equipped with a tool rest 84 and an automatic detection device; the automatic detection device includes a detection tool. The detection tool is connected to a rotating shaft, the rotating shaft is connected to a sensor through a linkage device, and the sensor controls the machine tool to display the detection result by sensing the different rotational forces output by the detection tool to the rotating shaft; the detection tool includes one of a thread plug gauge and a tap.

[0024] As a structural preference, the 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 linkage device. The first linkage 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 through 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 an elastic force adjusting bracket 14. The elastic force adjusting bracket 14 is connected to a first box body 10; the first swing arm 18 cooperates with and contacts the sensing rod 22 of the first sensor 21.

[0025] The elastic force adjusting bracket 14 is provided with two or more first adjusting holes 13, and the first adjusting holes 13 cooperate with the second screw 15; the sensing rod 22 is a spring rod; the first sensor 21 is connected to a first connecting rod 16 through a first connecting column 19. The first connecting rod 16 is connected to the elastic force adjusting bracket 14 or connected to the first box body 10. The first connecting rod 16 is parallel to the sensing rod 22, and the distance between the first connecting rod 16 and the sensing rod 22 is the swing range of the first swing arm 18.

[0026] A first shaft sleeve 24 is sleeved in the middle of a first rotating shaft 25. Rubber pads 23 are sleeved at both the front and rear ends of the first shaft sleeve 24. A positioning screw 12 is connected to the outer periphery of the first shaft sleeve 24. The positioning screw 12 is connected to a first box body 10 and the first rotating shaft 25. One end of the first rotating shaft 25 is provided with a reduced-diameter shaft end 27, and a second spring 26 is sleeved on the outer periphery of the reduced-diameter shaft end 27.

[0027] A method for detecting the size of a threaded hole of a workpiece without stopping the machine includes the following steps:

[0028] Step 1: A threaded hole is machined on the workpiece 66 by a cutting tool on a tool rest 84.

[0029] Step 2: For the machined threaded hole, a threaded hole automatic detection device 9 is used to cooperate with the threaded hole by a tap 11 or a thread 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 and trigger the sensing rod 22 of the first sensor 21, and the machine tool displays the detection result for alarm processing. At this time, it indicates that the cutting tool has been worn or damaged and needs to be replaced.

[0030] As a structural preference, the automatic feeding device 2 of the workpiece 66 includes a laterally adjustable seat 62 and a longitudinally adjustable seat 61 that are connected to each other. The longitudinally adjustable seat 61 is connected to a vertical connecting plate 63. The vertical connecting plate 63 is connected to a first slider 60. The first slider 60 is connected to a workpiece gripper base 64. The workpiece gripper base 64 is respectively connected to a vertical cylinder 72, a longitudinal cylinder mounting seat 71, and a workpiece gripper. The workpiece gripper includes a fixed gripper seat 65 and a rotating gripper 73 that are connected to each other. The workpiece 66 is clamped between the fixed gripper seat 65 and the rotating gripper 73, and the workpieces 66 are arranged along a guide groove 75. The longitudinal cylinder mounting seat 71 is connected to a second slider 69. The second slider 69 is connected to a horizontal cylinder 68. The horizontal cylinder 68 is connected to a pressing plate 67. The cylinder push rod 70 of the horizontal cylinder 68 is connected to the workpiece gripper base 64.

[0031] The working process of the automatic feeding device 2 is as follows: The vertical cylinder 72 drives the workpiece gripper to convey the workpiece 66 to the chuck 3 of the machine tool. Then, the horizontal cylinder 68 drives the pressing plate 67 to press the workpiece 66 tightly into the chuck 3 through the cylinder push rod 70 to complete the automatic clamping function of the workpiece. Then, the automatic feeding device 2 resets, and the workpiece 66 in the guide groove 75 automatically enters the workpiece gripper. After the workpiece is processed, it reciprocates again to cooperate with the chuck 3 to work to achieve automated production.

[0032] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill 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 present 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's threaded hole without stopping the machine, comprising a machine tool housing (1), a machine head (5) for installing a chuck (3), an automatic feeding device (2) for a workpiece (66), and a tool rest device (4) arranged inside the machine tool housing (1), characterized in that: The described tool rest device (4) includes a carriage (6) driven by a motor (8). A tool rest (84) and an automatic detection device are mounted on the carriage (6). The automatic detection device includes a detection tool. The detection tool is connected to a rotating shaft, the rotating shaft is connected to a sensor through a connecting rod device, and the sensor controls the machine tool to display the detection result by sensing different rotating forces output by the detection tool to the rotating shaft. The detection tool includes a thread plug gauge or a tap.

2. The machine tool for detecting the size of the threaded hole of the workpiece without stopping the machine according to claim 1, characterized in that: The automatic detection device includes an automatic thread hole detection device (9). The automatic thread hole 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) through a first screw rod (20). The other end of the first spring (17) is connected to a second screw rod (15). The second screw rod (15) is connected to an elastic force adjusting bracket (14). The elastic force adjusting bracket (14) is connected to a first box body (10). The first swing arm (18) is in contact with the sensing rod (22) of the first sensor (21) in a matching manner.

3. A machine tool for detecting the size of a workpiece threaded hole without stopping the machine, characterized in that: The elastic force adjusting bracket (14) is provided with more than two first adjusting holes (13) which are matched with the second screw rod (15). The sensing rod (22) is a spring rod. The first sensor (21) is connected to a first connecting rod (16) through a first connecting column (19). The first connecting rod (16) is connected to the elastic force adjusting bracket (14) or the first box body (10). The first connecting rod (16) and the sensing rod (22) are parallel to each other. The distance between the first connecting rod (16) and the sensing rod (22) is the swing range of the first swing arm (18).

4. A machine tool for detecting the size of a workpiece threaded hole without stopping the machine, characterized in that: A first bushing (24) is sleeved in the middle of the first rotating shaft (25). Rubber pads (23) are sleeved at the front and rear ends of the first bushing (24). A positioning screw rod (12) is connected to the outer circumference of the first bushing (24). The positioning screw rod (12) is connected to the first box body (10) and the first rotating shaft (25). A reduced-diameter shaft end (27) is provided at one end of the first rotating shaft (25). A second spring (26) is sleeved on the outer circumference of the reduced-diameter shaft end (27).

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