Length on-line detection mechanism

Abstract

The utility model discloses a length on-line detection mechanism, which comprises a contact displacement sensor, a sensor installation fixing sleeve, a contact extension piece and an installation fixing bracket, wherein the two ends of the sensor installation fixing sleeve are communicated; the sensor mounting fixing sleeve is sleeved on the outer ring of the contact type displacement sensor, and the contact type displacement sensor is fixedly connected with the sensor mounting fixing sleeve through a connecting piece; the rear end of the contact extension piece is connected with the front end of the contact type displacement sensor, and the front end of the contact extension piece is arranged outside the sensor mounting and fixing sleeve; the installation fixing support is connected with the sensor installation fixing sleeve. The device can be installed in the front area of a main shaft of the multi-shaft automatic lathe, the contact type displacement sensor is connected with a control system of the multi-shaft automatic lathe, and the device can be used for detecting the length of the extending part of the charge bar before cutting operation.

Description

Technical Field

[0001] The utility model relates to the technical field of online detection, in particular to an online length detection mechanism. Background Art

[0002] Online detection is to use soft measurement technology to perform real-time detection and real-time feedback through equipment directly installed on the production line, so as to better guide production and reduce unnecessary waste.

[0003] In some multi-axis automatic lathes, multiple circumferentially distributed spindles are set up on the spindle turntable. During the processing, the material rod is inserted into the spindle from the back to the front, and the spindle turntable will drive the spindle to rotate step by step in the circumferential direction. The front side of the spindle is the processing position, which is equipped with several processing tools and clamping fixtures.

[0004] After the processing starts, one of the spindles is located on the side of the clamping fixture. The clamping fixture can clamp the protruding part of the material bar protruding from the front end of the spindle according to the setting and pull the material bar forward to a fixed length. Then the spindle turntable rotates and drives the material bar to rotate. The processing tool starts to perform a certain amount of turning on the side tube wall of the protruding part of the material bar (the part of the material bar protruding from the spindle) to form a preset shape (i.e., cutting and forming operation). After the cutting and forming operation and before the cutting operation, if the length of the protruding part of the material bar meets the preset, the cutting tool cuts the protruding part of the material bar from the preset cutting point (cutting operation). After the front section of the protruding part of the material bar is cut off from the material bar, a finished workpiece (part) with a qualified length can be formed.

[0005] However, after long-term use of the multi-axis automatic lathe, the material clamp and other parts of the machine tool may be worn out, which may cause the material clamp to fail to accurately complete the operation instructions. For example, the length of the material rod pulled out of the spindle by the material clamp is too long or too short, that is, the front end of the material rod is not at the preset zero position after the material clamp is pulled out of the spindle, and the other operation data values ​​of the multi-axis automatic lathe have been pre-set before starting; finally, after the cutting operation and before the cutting operation, the length of the protruding part of the material rod may not meet the preset, and when the tool cuts the protruding part of the material rod from the preset cutting point according to the preset path, the length of the finished workpiece formed after cutting will not match the length of the qualified workpiece, that is, an unqualified workpiece with a length that is too long or too short will be formed.

[0006] For example, since the initial length of the material rod itself is too short, the length of the part of the material rod extending out from the front side of the spindle after being pushed into the spindle and before being pulled out of the spindle by the clamping fixture is too short; afterwards, although the clamping fixture accurately pulls the material rod in the spindle forward a fixed length according to the preset value, the front end of the material rod may still not be able to reach the preset zero position, and after each turning tool cuts and cuts the material rod according to the preset path and turning points, the length of the finished workpiece after processing is still too short, which does not match the length of the preset standard part product.

[0007] In the prior art, during the operation of a multi-axis automatic lathe, there is a lack of corresponding components to detect in real time the length of the protruding portion of the material rod before the cutting operation, so as to assist in determining whether there will be an error in the length of the final workpiece product. Once an error occurs and continuous production occurs, it may lead to the production of a large number of unqualified workpiece products. Utility Model Content

[0008] The purpose of the utility model is to provide an online length detection mechanism to solve the technical problem that the length of the protruding portion of the material rod extending out of the main shaft before the cutting operation cannot be timely detected in the prior art during the processing of the multi-axis automatic lathe. The utility model has a simple structure and lower cost.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] An online length detection mechanism comprises a contact displacement sensor, a sensor installation fixing sleeve with two ends penetrating therethrough, a contact extension piece and an installation fixing bracket;

[0011] The sensor mounting and fixing sleeve is sleeved on the outer ring of the contact displacement sensor, and the contact displacement sensor and the sensor mounting and fixing sleeve are fixedly connected through a connecting piece; the rear end of the contact extension piece is connected to the front end of the contact displacement sensor, and the front end of the contact extension piece is placed outside the sensor mounting and fixing sleeve;

[0012] The mounting and fixing bracket is connected to the sensor mounting and fixing sleeve.

[0013] Furthermore, the front end of the sensor installation fixing sleeve is also connected to an extension piece fixing sleeve that passes through the front and rear ends; the extension piece fixing sleeve is arranged on the outer ring of the contact extension piece, and the front end of the contact extension piece extends out from the front port of the extension piece fixing sleeve.

[0014] Furthermore, the extension piece fixing sleeve is detachably connected to the sensor installation fixing sleeve.

[0015] Furthermore, the contact extension piece is threadedly connected to the contact displacement sensor.

[0016] Furthermore, the contact extension member includes a contact section, an intermediate connecting section 1, an intermediate connecting section 2 and a screw rod which are connected in sequence from front to back; the screw rod is threadedly connected to the contact displacement sensor, and the width of the contact section and the width of the intermediate connecting section 2 are both greater than the width of the intermediate connecting section 1.

[0017] Furthermore, the contact segment, the middle connecting segment 1 and the middle connecting segment 2 are all cylinders; the outer diameter of the contact segment is equal to the outer diameter of the middle connecting segment 2; and the outer diameter of the middle connecting segment 1 is one third of the outer diameter of the contact segment.

[0018] Compared with the prior art, the utility model provides an online length detection mechanism, which has the following beneficial effects:

[0019] The length online detection mechanism in the utility model can be installed and fixed on the processing position of the multi-axis automatic lathe through the installation fixing bracket, located in front of the spindle turntable, and the front end of the contact extension piece in the length online detection mechanism is facing the front end surface of the spindle turntable. At the same time, the contact displacement sensor in the length online detection mechanism can be connected to the control system of the multi-axis automatic lathe.

[0020] Before the finished workpiece is cut off from the material bar after the cutting and forming operation, the material bar extension will rotate with the spindle turntable to the front of the contact extension; then, the material bar is pushed forward by the feeding drive mechanism of the multi-axis automatic lathe, causing the front end of the material bar to move horizontally toward the front end of the contact extension by a preset distance. After the front end of the material bar extension (i.e. the front end of the material bar) contacts the front end of the contact extension, the contact displacement sensor is compressed to detect the displacement data of the front end of the material bar. In the uncompressed state, the front end vertex of the contact extension is at the preset position point.

[0021] If the displacement data detected by the contact displacement sensor is within the preset range after the front end of the material rod is pushed horizontally toward the front end of the contact extension, it means that the length of the extended part of the material rod is qualified at this time; before the cutting operation, if the length of the extended part of the material rod meets the requirements, the length of the finished workpiece formed after the tool cuts off the extended part of the material rod from the preset cutting point will also meet the preset length, and you can choose to continue the subsequent cutting operation.

[0022] If the contact displacement sensor does not detect any displacement or the detected displacement value exceeds the preset upper limit after the front end of the material rod is pushed horizontally toward the front end of the contact extension, it means that the length of the extended part of the material rod does not meet the requirements. At this time, if the tool continues to cut from the preset cutting point, the length of the finished workpiece after cutting will not meet the requirements, and you can choose to pause the operation.

[0023] Before the cutting operation, when it is detected that the length of the extended part of the material rod does not meet the requirements, since the contact displacement sensor is connected to the control system of the multi-axis automatic lathe, the control system can issue an alarm and stop the processing operation, which can avoid the production of a large number of unqualified products. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the length online detection mechanism of the utility model.

[0025] Figure 2 It is a structural schematic diagram of the utility model in which the length online detection mechanism is installed on the front side of the main shaft turntable.

[0026] Figure 3 yes Figure 2 Left view of .

[0027] Figure 4 It is a partial structural schematic diagram of the length online detection mechanism of the utility model in a working state.

[0028] Figure 5 It is a cross-sectional view of the online length detection mechanism of the utility model.

[0029] Figure 6 It is a structural schematic diagram of a sensor installation fixing sleeve in the utility model.

[0030] Figure 7 It is a structural schematic diagram of the extension piece fixing sleeve in the utility model.

[0031] Figure 8 It is a structural schematic diagram of the contact extension piece in the utility model.

[0032] In the picture:

[0033] 1-spindle turntable, 2-spindle, 3-material rod extension, 4-contact displacement sensor, 5-fixing sleeve, 51-sensor installation fixing sleeve, 511-sleeve cavity one, 52-extension piece fixing sleeve, 521-sleeve cavity two, 6-contact extension piece, 61-contact section, 62-middle connecting section one, 63-middle connecting section two, 64-screw, 7-installation fixing bracket. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] like Figure 1-8As shown, the utility model provides an online length detection mechanism, including a contact displacement sensor 4, a sensor installation and fixing sleeve 51 with two ends penetrating therethrough, a contact extension piece 6 and an installation and fixing bracket 7.

[0036] At the same time, if Figure 5 As shown, in this embodiment, the front end of the sensor mounting fixing sleeve 51 is also connected to an extension fixing sleeve 52 that penetrates the front and rear ends; the extension fixing sleeve 52 and the sensor mounting fixing sleeve 51 are connected by screws to form the fixing sleeve 5. If the extension fixing sleeve 52 needs to be replaced, the screws can be removed to quickly remove the extension fixing sleeve 52 for replacement.

[0037] At the same time, if Figure 5-Figure 7 As shown, the sensor installation fixing sleeve 51 has a sleeve cavity 1 511, and the front and rear ends of the sleeve cavity 1 511 are connected; the extension fixing sleeve 52 has a sleeve cavity 2 521, and the front and rear ends of the sleeve cavity 2 521 are connected. After assembly, the sleeve cavity 1 511 and the sleeve cavity 2 521 are connected.

[0038] The extension piece fixing sleeve 52 is sleeved on the outer ring of the contact extension piece 6, and not only provides a certain protection for the contact extension piece 6, but also serves as a limit for the contact extension piece 6. The front end of the contact extension piece 6 extends out from the front end of the extension piece fixing sleeve 52. After the front end is pressed, the contact extension piece 6 can move horizontally along the second sleeve cavity 521.

[0039] like Figure 8 As shown, in this embodiment, the contact extension member 6 includes four sections, namely, the contact section 61, the middle connecting section 1 62, the middle connecting section 2 63 and the screw 64, which are connected in sequence from front to back. Among them, the screw 64 is threadedly connected to the contact displacement sensor 4, and the front end of the screw 64 is fixedly connected to the middle connecting section 2 63; the middle connecting section 1 62 and the middle connecting section 2 63 are fixedly connected, and the middle connecting section 1 62 is fixedly connected to the rear end of the contact section 61.

[0040] At the same time, if Figure 8 As shown, in this embodiment, when viewed from the side, the connected contact segment 61, the middle connecting segment 1 62 and the middle connecting segment 2 63 are in an H-like structure as a whole, that is, the width of the contact segment 61 and the width of the middle connecting segment 2 63 are both greater than the width of the middle connecting segment 1 62. The middle connecting segment 1 62 located between the contact segment 61 and the middle connecting segment 2 63 is thinner. When the side wall of the contact segment 61 is hit by an external force, the middle connecting segment 1 62 is easy to break or bend first because the middle connecting segment 1 62 is thinner, thereby preventing the external force from being excessively transmitted to the contact displacement sensor 4, and preventing the contact displacement sensor 4 from being accidentally damaged.

[0041] Because during the installation and use process, the length online detection mechanism is installed and fixed near the processing position of the multi-axis automatic lathe and is located in front of the spindle turntable 1, such as Figure 2 As shown. At the same time, each cutting tool is also located in front of the spindle turntable 1 and will continuously move and alternately perform cutting operations on each pair of material rod extensions. During the movement of the tool, it may collide with the contact segment 61 due to an accident (such as loosening and falling), or the front end vertex of the material rod extension 3 is already behind the front end vertex of the contact segment 61 before the material rod extension 3 rotates to the front side of the contact segment 61. At this time, the spindle turntable 1 continues to drive the material rod extension 3 to rotate circumferentially toward the contact segment 61, and the side wall of the material rod extension 3 will collide with the front end side wall of the contact segment 61. After the collision, the middle connecting section 1 62 is thinner and will break or bend first, thereby avoiding the excessive transmission of the external force to the contact displacement sensor 4, thereby reducing the risk of accidental damage to the contact displacement sensor 4.

[0042] like Figure 8 As shown, in this embodiment, the contact segment 61, the middle connecting segment 1 62 and the middle connecting segment 2 63 are all cylinders; the outer diameter of the contact segment 61 is equal to the outer diameter of the middle connecting segment 2 63, which is 6 mm; and the outer diameter of the middle connecting segment 1 62 is one third of the outer diameter of the contact segment 61, which is 2 mm.

[0043] Of course, adding the contact extension piece 6 at the front end of the contact displacement sensor 4 is also for avoiding direct contact between the contact displacement sensor 4 and the material rod extension 3, thereby reducing the risk of loss of the contact displacement sensor 4.

[0044] In this embodiment, the fixing bracket 7 is installed to fix the online length detection mechanism to the multi-axis automatic lathe, so that the online length detection mechanism is fixedly installed on the front side of the spindle turntable 1.

[0045] Meanwhile, in this embodiment, after the contact displacement sensor 4 is inserted into the sensor mounting and fixing sleeve 51, the contact displacement sensor 4 and the sensor mounting and fixing sleeve 51 are fixed by screws, and at the same time, the sensor mounting and fixing sleeve 51 is fixedly connected to the mounting and fixing bracket 7. In this way, after the length online detection mechanism is fixedly installed on the front side of the spindle turntable 1 by the mounting and fixing bracket 7, it can be ensured that the position of the front end vertex of the contact extension member 6 is in the preset position without changing under the premise of not being subjected to force after installation.

[0046] During operation, the spindle turntable 1 only rotates in the radial direction and cannot move longitudinally or transversely. At the same time, various operation values ​​of the multi-axis automatic lathe (such as the displacement value of the clamping fixture to pull the material rod in the spindle forward, the displacement value of the horizontal feeding and withdrawing of the material rod in the spindle during processing, and the cutting point of the tool cutting off the extended part of the material rod, etc.) have been pre-set before processing and are determined during the processing.

[0047] In this embodiment, the contact displacement sensor 4 is a KEYENCE GT2-P contact displacement sensor; the multi-axis automatic lathe is a TORNOS MultiSwiss 8X26. When the multi-axis automatic lathe is used to turn the material bar, each tool will cut on the side wall of the material bar extension, and finally the cutting tool will cut the front section of the formed material bar extension 3 from the material bar according to the preset path or cutting point, and finally form a finished workpiece after being cut.

[0048] When in use, we install the length online detection mechanism on the front side of the spindle turntable 1, such as Figure 2 As shown, the contact extension piece 6 extends horizontally, and when the main shaft turntable 1 rotates to drive the corresponding material rod to be located in front of the contact extension piece 6, the front end vertex of the contact extension piece 6 faces the front end of the material rod extension part 3. At this time, the material rod in the corresponding main shaft 2 is pushed forward by the feeding drive mechanism of the multi-axis automatic lathe, which can cause the front end of the material rod to move horizontally toward the front end of the contact segment 61 by a preset distance. If the material rod extension part 3 pushes the contact segment 61, the contact extension piece 6 moves backward, and the contact displacement sensor 4 will detect the displacement value after being pressed, such as Figure 4 shown.

[0049] At the same time, in this embodiment, we also connect the contact displacement sensor 4 to the control system of the multi-axis automatic lathe. When the displacement value received by the control system is within the set value range, it means that the length of the material bar extension 3 before the cutting operation is qualified. At this time, if the cutting tool cuts off the front section of the material bar extension 3 from the material bar according to the preset path, the length of the finished workpiece formed meets the requirements. This can reduce the subsequent operation steps of manually detecting the length of the finished workpiece, which can reduce labor costs.

[0050] If the contact displacement sensor 4 does not detect a displacement value or the detected displacement value exceeds the set upper limit after the front end of the material rod is horizontally pushed toward the front end of the contact segment 61 for a preset distance, it means that the length of the material rod extension 3 is unqualified before the cutting operation. At this time, if the cutting tool still cuts off the front section of the material rod extension 3 from the material rod according to the preset path, the length of the finished workpiece does not meet the requirements.

[0051] After the front end of the material rod is pushed forward and moved horizontally, the contact displacement sensor 4 will promptly feed back the detected situation and the detected displacement value to the control system. When it is found that the displacement value of the front end of the material rod does not meet the preset value, the control system can give a warning reminder, and automatically or manually stop the operation of the multi-axis automatic lathe after receiving the warning, so as to avoid continuously processing more finished workpieces with unqualified lengths and reduce the loss and waste of raw materials. To this end, through the above method, we can realize real-time online understanding of whether the length of the material rod extension 3 before the cutting operation is qualified during the production and processing process, and adjust the production rhythm in time after the error occurs, so as to avoid the production of a large number of unqualified products.

Claims

1. An online length detection mechanism, characterized in that: It includes a contact displacement sensor, a sensor installation fixing sleeve with two ends penetrating therethrough, a contact extension piece and an installation fixing bracket; The sensor mounting and fixing sleeve is sleeved on the outer ring of the contact displacement sensor, and the contact displacement sensor and the sensor mounting and fixing sleeve are fixedly connected through a connecting piece; the rear end of the contact extension piece is connected to the front end of the contact displacement sensor, and the front end of the contact extension piece is placed outside the sensor mounting and fixing sleeve; The mounting and fixing bracket is connected to the sensor mounting and fixing sleeve.

2. The online length detection mechanism according to claim 1, characterized in that: The front end of the sensor installation fixing sleeve is also connected to an extension fixing sleeve with front and rear ends passing through; the extension fixing sleeve is sleeved on the outer ring of the contact extension, and the front end of the contact extension extends out from the front port of the extension fixing sleeve.

3. The online length detection mechanism according to claim 2, characterized in that: The extension piece fixing sleeve is detachably connected to the sensor installation fixing sleeve.

4. The online length detection mechanism according to claim 2, characterized in that: The contact extension piece is threadedly connected to the contact displacement sensor.

5. An online length detection mechanism according to any one of claims 1 to 4, characterized in that: The contact extension piece includes a contact section, an intermediate connecting section 1, an intermediate connecting section 2 and a screw rod which are connected in sequence from front to back; the screw rod is threadedly connected to the contact displacement sensor, and the width of the contact section and the width of the intermediate connecting section 2 are both greater than the width of the intermediate connecting section 1.

6. The online length detection mechanism according to claim 5, characterized in that: The contact segment, the first intermediate connecting segment and the second intermediate connecting segment are all cylindrical; the outer diameter of the contact segment is equal to the outer diameter of the second intermediate connecting segment; and the outer diameter of the first intermediate connecting segment is one third of the outer diameter of the contact segment.

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