A machine tool workpiece clamping detection device

Abstract

The present invention relates to a machine tool workpiece clamping detection device, which comprises a machine tool table, on which a workpiece position for placing a workpiece is provided; a mounting seat, on which the mounting seat can move along the XYZ direction above the machine tool table, and is detachably mounted with a tool for cutting the workpiece or a detection tube extending downward in the vertical direction, the detection tube being able to bend by collision and not rebound; when the detection tube is mounted on the mounting seat and the workpiece position is placed with the workpiece, the length of the detection tube is set to not collide with the workpiece in the process of translating from the reset height over the workpiece, and colliding with the workpiece in the process of translating from the non-reset height over the workpiece; and a tool setting instrument, which is mounted on the machine tool table. By detecting whether the detection tube is bent due to touching the workpiece, it is determined whether the position of the mounting seat is at a normal height, thereby avoiding damage to the mounting seat or the machine tool due to improper operation by the operator.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool workpiece detection, in particular to a machine tool workpiece clamping detection device. Background Art

[0002] When a factory processes a tiny cylindrical workpiece into a metal sheet, it usually mounts the workpiece vertically on the machine table and then performs milling on the end face of the workpiece, as shown in the attached figure of the manual. Figure 1 and Figure 2 As shown in the figure, after the end face of the workpiece is milled, the small cutting tool will be lowered to the initial point of the highest first processing position of the workpiece. The cutting tool will then horizontally cut around the side of the workpiece and return to the initial point, cutting a thin slice from the workpiece and transporting it away. Then the cutting tool will be adjusted to the next processing plane in the Z direction of the processing coordinate. By analogy, another thin slice will be cut from the workpiece using the cutting tool. The cycle will continue until the material is processed. The operator will control the cutting tool to reset to the highest first processing position and then replace the new workpiece. During the processing, after each thin slice is cut, the operator needs to collect the cut thin slices and check whether the machine tool controller prompts to change the material. If there is a prompt, let the operator change the material.

[0003] However, sometimes due to operator negligence, the operator does not wait for the machine tool controller to prompt before changing to a new material, and does not feed back the operation of changing to a new material to the machine tool controller, resulting in the machining coordinates not being reset to the highest first machining position. When the machining program is started, the tool is below the correct cutting position, causing the tool to hit the workpiece, causing damage to the workpiece, spindle and machine tool. In order to solve this problem, some manufacturers use 3D probes to detect whether the workpiece position is correct before each machining, but this 3D probe is expensive and needs to be powered by dry batteries, resulting in a high overall cost of use. Summary of the invention

[0004] The object of the present invention is to provide a machine tool workpiece clamping detection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a machine tool workpiece clamping and detection device, which includes a machine tool table, on which a workpiece position for placing a workpiece is provided; a mounting seat, which can move along the XYZ direction above the machine tool table and is detachably mounted with a tool for cutting the workpiece or a detection tube extending downward in the vertical direction, wherein the detection tube can be bent by collision and does not rebound; when the detection tube is installed on the mounting seat and a workpiece is placed on the workpiece position, the length of the detection tube is set to not collide with the workpiece during the process of translating from the reset height over the workpiece, and to collide with the workpiece during the process of translating from the non-reset height over the workpiece; a tool setting instrument, which is mounted on the machine tool table.

[0006] Furthermore, the mounting seat includes a main body and a main shaft, the main shaft is mounted on the bottom end of the main body, and the detection tube is detachably mounted on the main shaft.

[0007] Furthermore, the spindle is provided with a mounting head, and the detection tube or the tool is detachably mounted on the mounting head.

[0008] Furthermore, a driving mechanism is connected to the mounting seat, and the driving mechanism drives the mounting seat to move.

[0009] Furthermore, the detection tube is a hollow copper tube or a hollow aluminum tube.

[0010] The beneficial effects of the present invention are as follows: by detecting whether the detection tube is bent due to touching the workpiece, it is possible to determine whether the position of the mounting seat is at a normal height, thereby avoiding damage to the mounting seat or the machine tool due to improper operation by the operator. Moreover, since the detection tube is low in cost, a new detection tube can be replaced in time after being bent by the workpiece, which reduces the cost of use compared to using a three-dimensional probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0012] Figure 1 A schematic diagram of a small-sized cutting tool cutting a workpiece in the prior art;

[0013] Figure 2 It is a schematic diagram of a workpiece after cutting in the prior art;

[0014] Figure 3 A schematic diagram of a structure provided for an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the detection tube after collision with the workpiece;

[0016] Figure 5 Schematic diagram of preparing the tool setting probe for contact with the detection tube.

[0017] In the figure: 100-workpiece; 1-machine table; 11-workpiece position; 2-tool setting instrument; 3-mounting seat; 31-main body; 32-spindle; 33-mounting head; 4-detection tube. DETAILED DESCRIPTION

[0018] like Figure 3 As shown in , an embodiment of the present invention provides a machine tool workpiece clamping detection device, which includes a machine tool table 1, a tool setting instrument 2, and a mounting seat 3. The machine tool table 1 is provided with a workpiece position 11, the workpiece position 11 is used to place a workpiece 100 to be processed, the mounting seat 3 is used to install a tool, the mounting seat 3 can move along the working coordinate XYZ axis above the machine tool table 1, and the mounting seat 3 can control the tool to cut the workpiece 100, and cut the workpiece 100 into multiple slices.

[0019] like Figure 3-4 As shown in , the tool setting instrument 2 is installed on the machine tool table 1. When an object contacts the tool setting instrument 2, the tool setting instrument 2 sends a signal to the controller of the machine tool. The mounting seat 3 is connected to a driving mechanism, and the driving mechanism can drive the mounting seat 3 to translate above the machine tool table 1, and can also drive the mounting seat 3 to rise and fall at the workpiece position 11 or at the tool setting instrument 2, wherein the driving mechanism can be a robotic arm or a screw slide rail module. The mounting seat 3 is detachably mounted with a detection tube 4, and the detection tube 4 extends downward in a vertical direction, wherein the detection tube 4 is generally made of a bendable and non-rebound pipe, such as a hollow aluminum tube or a copper tube, and the diameter of the pipe is close to that of a copper wire, and such a pipe can be easily bent and does not rebound. When the detection tube 4 is installed on the mounting seat 3 and the workpiece 100 is placed on the workpiece position 11, the length of the detection tube 4 is set to not collide with the workpiece 100 when translating from the self-resetting height to pass over the workpiece 100, and to collide with the workpiece 100 when translating from the non-resetting height to pass over the workpiece 100.

[0020] like Figure 3-5As shown in the figure, the detection tube 4 moves with the mounting seat 3 and passes over the workpiece position 11 and the tool setting instrument 2 in turn. In actual use, the mounting seat 3 first installs a tool for cutting the workpiece. After the mounting seat 3 cuts the workpiece 100 into multiple thin slices, the operator puts a new workpiece 100 on the workpiece 11, and then replaces the tool with the detection tube 4. The vertical distance from the bottom end of the detection tube 4 without collision to the top end of the tool setting instrument 2 is assumed to be A. When the operator is prompted by the machine tool controller, he changes to new material and resets the processing coordinates of the mounting seat 3 to the highest first processing position. When the mounting seat 3 is at a normal working height, the bottom end of the detection tube 4 is higher than the workpiece 100, and the detection tube 4 passes over the workpiece 100 without colliding with the workpiece 100. The detection tube 4 always maintains a vertically downward extending state. When the detection tube 4 passes the tool setting instrument 2, the mounting seat 3 drives the detection tube 4 to move downward a distance A. At this time, the detection tube 4 contacts the tool setting instrument 2, and the tool setting instrument 2 sends a signal to the machine tool controller. The machine tool controller receives the signal and determines that the mounting seat 3 is in a normal position. The mounting seat 3 returns to the position when the operator installed the detection tube 4 before. The operator replaces the detection tube 4 with a tool to start the next round of cutting of the workpiece 100.

[0021] However, due to the operator's negligence, the new material is replaced without waiting for the prompt from the machine tool controller, and the processing coordinates of the mounting seat 3 are not reset to the first highest processing position. When the mounting seat 3 is in an abnormal position, the bottom end of the detection tube 4 is lower than the top of the workpiece 100, and the mounting seat 3 passes through the workpiece position 11. At this time, the detection tube 4 will touch the workpiece 100, and the detection tube 4 will bend due to the reaction force of the workpiece 100. Then the mounting seat 3 drives the detection tube 4 to leave the workpiece 100 and move above the tool setting instrument 2. When the detection tube 4 is above the tool setting instrument 2, the mounting seat 3 drives the detection tube 4 to move downward a distance A. At this time, since the detection tube 4 is in a bent state, the detection tube 4 and the tool setting instrument 2 are separated, and the tool setting instrument 2 cannot detect any object contact. The machine tool controller does not receive the contact signal from the tool setting instrument 2. The machine tool controller determines that the mounting seat 3 is in an abnormal position, indicating that the operator is negligent in operation. In this case, the external alarm device can send an alarm to prompt the operator to adjust the mounting seat 3 and the machine tool. At this time, the operator needs to reset the processing coordinates of the mounting seat 3 to the highest first processing position, and then replace the detection tube 4 with a tool to restart the next round of cutting of the workpiece 100. By detecting whether the detection tube 4 is bent due to touching the workpiece 100, it is determined whether the position of the mounting seat 3 is at a normal height, avoiding damage to the mounting seat 3 or the machine tool due to improper operation by the operator. In addition, since the detection tube 4 is low in cost, it can be replaced with a new detection tube 4 in time after being bent by the workpiece 100, which reduces the cost of use compared to using a three-dimensional probe.

[0022] like Figure 3-5 As shown in , the mounting seat 3 includes a main body 31 and a spindle 32, the spindle 32 is mounted at the bottom of the main body 31, the detection tube 4 is detachably mounted on the spindle 32, and the main body 31 controls the rotation of the spindle 32. The spindle 32 is provided with a mounting head 33, the mounting head 33 is located at the bottom of the spindle 32, the tool or the detection tube 4 is detachably mounted on the mounting head 33, and the tool or the detection tube 4 can be switched on the mounting head 33 at any time according to different work requirements. Therefore, the detection tube 4 and the tool for cutting the workpiece 100 can share a mounting head 33, and there is no need to set a new structure on the spindle 32 to match the tool, which saves the overall cost of the mounting seat 3 and is convenient for the operator to install the detection tube 4. The detection tube 4 is a hollow copper tube or a hollow aluminum tube. The hollow detection tube 4 is easy to bend and deform when hit, and will not rebound, nor will it cause damage to the workpiece 100.

[0023] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0024] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A machine tool workpiece clamping detection device, characterized in that: include: A machine tool table, wherein a workpiece position for placing a workpiece is provided on the machine tool table; A mounting seat, the mounting seat can move in XYZ directions above the machine table, and is detachably mounted with a tool for cutting a workpiece or a detection tube extending downward in a vertical direction, the detection tube being able to bend by collision without rebounding; when the detection tube is mounted on the mounting seat and a workpiece is placed on the workpiece position, the length of the detection tube is set so as not to collide with the workpiece during the process of translating from a reset height over the workpiece, and to collide with the workpiece during the process of translating from a non-reset height over the workpiece; A tool setting instrument is installed on the machine tool table.

2. The machine tool workpiece clamping detection device according to claim 1, characterized in that: The mounting seat comprises a main body and a main shaft, wherein the main shaft is mounted on the bottom end of the main body, and the detection tube is detachably mounted on the main shaft.

3. The machine tool workpiece clamping detection device according to claim 2, characterized in that: The main shaft is provided with a mounting head, and the detection tube or the tool is detachably mounted on the mounting head.

4. The machine tool workpiece clamping detection device according to claim 1 or 2, characterized in that: The mounting seat is connected with a driving mechanism, and the driving mechanism drives the mounting seat to move.

5. The machine tool workpiece clamping detection device according to claim 1, characterized in that: The detection tube is a hollow copper tube or a hollow aluminum tube.

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