Workpiece clamping position detection tool for numerically controlled lathe

Abstract

The utility model relates to the technical field of automatic accessories of numerically controlled lathes, and provides a workpiece clamping position detection tool for a numerically controlled lathe. One end of the oil cylinder pull rod is inserted into the connecting seat; the blind rivet is connected with the end part of the oil cylinder pull rod; an air passage is arranged in the oil cylinder pull rod, and an air vent is formed in the other end of the oil cylinder pull rod and communicated with an external air passage and a pressure sensor through a high-speed rotating joint; the connecting disc is fixedly mounted at the end part of the connecting seat; the elastic inner support is fixedly mounted in the connecting seat and sleeves the blind rivet; the positioning disc is fixedly mounted at the end part of the connecting disc; the connecting base, the connecting disc and the positioning disc are internally provided with communicated air channel channels, and the end face of the positioning disc is provided with an air hole. According to the technical scheme, when air leakage is detected through the pressure sensor, the air leakage is fed back to the numerical control machine tool, continuous machining is stopped, the workpiece rejection rate can be effectively reduced, the unnecessary machining waste phenomenon is reduced, and the production quality and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe automation parts technology, specifically to a workpiece clamping position detection fixture for CNC lathes. Background Technology

[0002] In automated CNC lathe production, the position of the workpiece is typically detected using proximity sensors. However, these sensors cannot effectively detect minor issues such as slight misalignment during workpiece clamping or poor flatness. Consequently, it's easy for workpieces with clamping errors to be directly processed on the automated CNC lathe, leading to machining errors, a high scrap rate, and severely impacting the quality and efficiency of automated CNC production. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, one objective of this utility model is to provide a workpiece clamping position detection fixture for CNC lathes. When the workpiece is not clamped properly or has poor flatness, air leakage will occur at the contact position between the end face of the positioning plate and the workpiece. When the air leakage is detected by the pressure sensor, it will be fed back to the CNC machine tool, and the processing will be stopped. This can effectively reduce the scrap rate of workpieces, reduce unnecessary processing waste, and improve production quality and efficiency.

[0005] To achieve the above objectives, the present invention provides a workpiece clamping position detection fixture for a CNC lathe, comprising: a cylinder rod mounted on a high-speed hollow rotary cylinder; a connecting seat mounted on the rotary spindle head, one end of the cylinder rod being inserted into the interior of the connecting seat, the cylinder rod being movably connected to the connecting seat; a pull stud connected to the end of the cylinder rod inserted into the connecting seat; the cylinder rod having an internal air passage and a vent at the other end, connected to an external air passage and a pressure sensor via a high-speed rotary joint; a connecting plate fixedly mounted on the end of the connecting seat away from the cylinder rod; an elastic inner support fixedly mounted inside the connecting seat and sleeved on the pull stud, the cylinder rod driving the pull stud to move, thereby expanding and resetting the elastic inner support outward; and a positioning plate fixedly mounted on the end of the connecting plate away from the connecting seat; the connecting seat, the connecting plate, and the positioning plate having interconnected air passages inside, and the end face of the positioning plate having multiple air holes communicating with the air passages.

[0006] Preferably, the main body of the elastic inner support is a hollow cylinder, and eight cracks are opened on the circumferential surface of one end, forming an eight-directional opening structure.

[0007] Preferably, the outer end of the pull stud is tapered, wider at the outside and narrower at the inside, and has a countersunk hole at its center.

[0008] Preferably, the end of the elastic inner support that contacts the workpiece is provided with a conical hollow structure that cooperates with the pull stud.

[0009] Preferably, three air holes are evenly distributed along the circumferential direction on the end face of the positioning disk, and the inner diameter of the air holes is 0.6 mm.

[0010] Preferably, a first sealing ring is provided at the mating connection position between the hydraulic cylinder rod and the connecting seat.

[0011] Preferably, a second sealing ring is provided at the air passage connection position between the connecting seat and the connecting plate, and at the air passage connection position between the connecting plate and the positioning plate.

[0012] Preferably, the cylinder tie rod is threadedly connected to the high-speed hollow rotary cylinder; the connecting seat is screwed to the rotary spindle head; the elastic inner support is threadedly connected to the connecting seat; the connecting plate is screwed to the connecting seat; the positioning plate is screwed to the connecting plate; and the pull stud is threadedly connected to the cylinder tie rod.

[0013] The workpiece clamping position detection fixture for CNC lathes proposed in this utility model has the following beneficial technical effects:

[0014] (1) The workpiece clamping position detection fixture for CNC lathe proposed in this utility model can accurately detect the workpiece clamping position and flatness, and can ensure that subsequent processing operations can be carried out when the workpiece is clamped in place and the flatness is good, which can effectively ensure the processing accuracy and workpiece qualification rate of the workpiece.

[0015] (2) In the workpiece clamping position proposed in this utility model, the elastic inner support and the pull stud are engaged by a conical surface. During the movement of the pull stud, the elastic inner support undergoes elastic deformation and expands, thereby forming an interference fit with the inner hole of the workpiece, fixing the workpiece firmly and making it easy to accurately detect the workpiece clamping position. At the same time, the positioning plate will limit the expansion range of the elastic inner support, effectively avoiding irreversible deformation of the elastic inner support and ensuring its service life.

[0016] (3) In the workpiece clamping position of the CNC lathe proposed in this utility model, a countersunk hole is set at the center position of the outer end of the pull stud, which facilitates the installation of the pull stud onto the hydraulic cylinder pull rod.

[0017] (4) The present invention proposes a workpiece clamping position for a CNC lathe with three air holes evenly arranged along the circumferential direction on the end face of the positioning plate. The inner diameter of the air holes is 0.6mm. The air holes are connected to the air passage, which facilitates the detection of whether there is air leakage at the contact position between the end face of the positioning plate and the workpiece by the pressure sensor, thereby realizing the workpiece clamping position and flatness detection. The detection accuracy is high.

[0018] (5) The present invention proposes a workpiece clamping position for a CNC lathe with sealing rings at the joint connection between the hydraulic cylinder rod and the connecting seat, the air passage connection between the connecting seat and the connecting plate, and the air passage connection between the connecting plate and the positioning plate. This further ensures airtightness and can effectively prevent air leakage during the ventilation test.

[0019] Additional aspects and advantages of this invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 A schematic diagram of a workpiece clamping position detection fixture for a CNC lathe according to an embodiment of the present invention is shown.

[0022] Figure 2 A schematic diagram of the positioning disk is shown;

[0023] Figure 3 A schematic diagram of the elastic internal support structure is shown;

[0024] Figure 4 A side view of the elastic internal support structure is shown.

[0025] Figure 5 It shows Figure 4 Schematic diagram of the cross-sectional structure at point AA;

[0026] Figure 6 A schematic diagram of the rivet structure is shown.

[0027] in, Figures 1 to 6 The correspondence between the reference numerals and components in the attached drawings is as follows:

[0028] 102 Cylinder tie rod, 104 Connecting seat, 106 Tie pin, 1062 Countersunk hole, 108 Air passage, 110 Vent, 112 Connecting plate, 114 Elastic inner support, 1142 Crack, 1144 Conical hollow structure, 116 Positioning plate, 118 Air hole, 120 First sealing ring, 122 Second sealing ring, 124 Workpiece. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0031] The following is combined with Figures 1 to 6 A workpiece clamping position detection fixture for a CNC lathe according to an embodiment of the present invention will be described in detail.

[0032] like Figures 1 to 6As shown, a workpiece clamping position detection fixture for a CNC lathe according to an embodiment of the present invention includes: a hydraulic cylinder rod 102, a connecting seat 104, an elastic inner support 114, a connecting plate 112, a positioning plate 116, a pull stud 106, a first sealing ring 120, and a second sealing ring 122. The hydraulic cylinder rod 102 is mounted on a high-speed hollow rotary cylinder, and the connecting seat 104 is mounted on the rotary spindle head, thereby enabling the detection fixture to be installed more conveniently into the CNC lathe. One end of the hydraulic cylinder rod 102 is inserted into the interior of the connecting seat 104, and the hydraulic cylinder rod 102 and the connecting seat 104 are movably connected. The pull stud 106 is connected to the end of the hydraulic cylinder rod 102 inserted into the connecting seat 104, and the hydraulic cylinder rod 102 can drive the pull stud 106 to move. The hydraulic cylinder rod 102 has an internal air passage 108 and an air vent 110 at the other end. It connects to an external air passage and pressure sensor via a high-speed rotary joint, enabling airflow through the hydraulic cylinder rod 102 and pressure detection within the air passage 108. This process does not affect normal machining and is unaffected by the machining process itself. The connecting plate 112 is fixedly installed on the end of the connecting seat 104 away from the hydraulic cylinder rod 102. An elastic inner support 114 is fixedly installed inside the connecting seat 104 and sleeved on the pull stud 106. The hydraulic cylinder rod 102 drives the pull stud 106 to move, allowing the elastic inner support 114 to expand outwards and reposition, thereby securing the workpiece 124. A positioning plate 116 is fixedly installed at the end of the connecting plate 112 away from the connecting seat 104. The positioning plate 116 can limit the expansion range of the elastic inner support 114, effectively prevent the elastic inner support 114 from undergoing irreversible deformation, ensure the service life of the elastic inner support 114, and at the same time, it can position the workpiece 124. The connecting seat 104, connecting plate 112, and positioning plate 116 are provided with interconnected air passages 108. The end face of the positioning plate 116 is provided with multiple air holes 118 that are connected to the air passages 108. When the hydraulic cylinder rod 102 drives the pull pin 106 to move, causing the elastic inner support 114 to expand and fix the workpiece 124, the air passages 108 of the hydraulic cylinder rod 102 are connected to the air passages 108 of the connecting seat 104. The workpiece 124 is in contact with the end face of the positioning plate 116 and can be supplied with air through an external air passage. The pressure sensor is used to detect whether there is air leakage at the contact position between the end face of the positioning plate 116 and the workpiece 124, thereby realizing the clamping position of the workpiece 124 and the detection of its flatness with high detection accuracy.

[0033] Furthermore, such as Figures 3 to 5 As shown, the main body of the elastic inner support 114 is a hollow cylinder, and eight cracks 1142 are opened on the circumferential surface of one end, forming an eight-directional opening structure. Thus, it can expand evenly in all directions under the action of the rivet 106, forming an interference fit with the inner hole of the workpiece 124, thereby fixing the workpiece 124.

[0034] Furthermore, such as Figure 6 As shown, the outer end of the rivet 106 is tapered with a wider outer diameter and a narrower inner diameter, and a countersunk hole 1062 is provided at its center. On the one hand, the countersunk hole 1062 makes it easier to install the rivet 106 on the hydraulic cylinder rod 102. On the other hand, the tapered end with a wider outer diameter and a narrower inner diameter is easy to pull into the elastic inner support 114, expand it evenly, and fix the workpiece 124.

[0035] Furthermore, such as Figures 3 to 5 As shown, the end of the elastic inner support 114 that contacts the workpiece 124 is provided with a conical hollow structure 1144 that cooperates with the rivet 106. Thus, it can expand outward under the action of the rivet 106, and the circumferential height of the outward expansion is completely consistent, ensuring that the position of the workpiece 124 will not shift.

[0036] Furthermore, such as Figure 1 As shown, three air holes 118 are evenly distributed along the circumference on the end face of the positioning disk 116, and the inner diameter of the air holes 118 is 0.6mm. The air holes 118 are connected to the air passage 108, which facilitates the detection of whether there is air leakage at the contact position between the end face of the positioning disk 116 and the workpiece 124 by the pressure sensor, so as to realize the workpiece 124 is clamped in place and the flatness is detected, with high detection accuracy.

[0037] Furthermore, such as Figure 1 As shown, a first sealing ring 120 is provided at the mating connection position between the hydraulic cylinder rod 102 and the connecting seat 104. Second sealing rings 122 are provided at the connection positions of the connecting seat 104 and the air passage 108 of the connecting plate 112, and at the connection positions of the connecting plate 112 and the positioning plate 116. This further ensures airtightness and effectively prevents air leakage during ventilation testing.

[0038] Furthermore, the hydraulic cylinder rod 102 is threadedly connected to the high-speed hollow rotary hydraulic cylinder; the connecting seat 104 is screwed to the rotary spindle head; the elastic inner support 114 is threadedly connected to the connecting seat 104; the connecting plate 112 is screwed to the connecting seat 104; the positioning plate 116 is screwed to the connecting plate 112; and the pull stud 106 is threadedly connected to the hydraulic cylinder rod 102. This ensures the reliability of the installation.

[0039] The working process of the workpiece clamping position detection fixture for CNC lathe proposed in this utility model is as follows:

[0040] When workpiece 124 is placed in the designated position, hydraulic cylinder rod 102 moves outward under the drive of telescopic hydraulic cylinder, simultaneously driving pull pin 106 connected to hydraulic cylinder rod 102 to move outward. The elastic inner support 114 and pull pin 106 are fitted with a conical surface. During the movement of pull pin 106, the elastic inner support 114 undergoes elastic deformation and expands, forming an interference fit with the inner hole of workpiece 124, thereby fixing workpiece 124 in place. Simultaneously, positioning plate 116 limits the expansion range of elastic inner support 114, effectively preventing irreversible deformation. Gas is introduced into air passage 108, and pressure is detected using a pressure sensor. If workpiece 124 is not properly clamped or its flatness does not meet requirements, air leakage will occur at the contact point between the end face of positioning plate 116 and workpiece 124. When the pressure sensor value does not reach the set range, a stop signal will be sent to the CNC lathe. If the workpiece 124 is properly clamped and its flatness meets the requirements, there will be no air leakage at the contact point between the end face of the positioning plate 116 and the workpiece 124. When the value of the pressure sensor reaches the set range, it will feed back a machining signal to the CNC lathe.

[0041] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A workpiece clamping position detection fixture for a CNC lathe, characterized in that, include: The cylinder tie rod is installed on the high-speed hollow rotary cylinder; A connecting seat is installed on the rotating spindle head. One end of the hydraulic cylinder rod is inserted into the interior of the connecting seat, and the hydraulic cylinder rod is movably connected to the connecting seat. A pull pin is connected to the end of the hydraulic cylinder rod inserted into the connecting seat. The hydraulic cylinder rod has an air passage inside and an air vent at the other end, which is connected to an external air passage and a pressure sensor through a high-speed rotary joint. A connecting plate is fixedly installed on the end of the connecting seat away from the hydraulic cylinder rod. An elastic inner support is fixedly installed inside the connecting seat and sleeved on the pull pin. The hydraulic cylinder rod drives the pull pin to move, so as to realize the elastic inner support expanding outward and returning to its original position. A positioning plate is fixedly installed on the end of the connecting plate away from the connecting seat. The connecting seat, the connecting plate, and the positioning plate have interconnected air passages inside. The end face of the positioning plate has multiple air holes that communicate with the air passages.

2. The workpiece clamping position detection fixture for CNC lathes according to claim 1, characterized in that, The main body of the elastic inner support is a hollow cylinder, and eight cracks are opened on the circumference of one end, forming an eight-directional opening structure.

3. The workpiece clamping position detection fixture for CNC lathes according to claim 2, characterized in that, The outer end of the rivet is tapered, wider at the outside and narrower at the inside, and has a countersunk hole at its center.

4. The workpiece clamping position detection fixture for CNC lathes according to claim 3, characterized in that, The end of the elastic inner support that contacts the workpiece is provided with a conical hollow structure that cooperates with the rivet.

5. The workpiece clamping position detection fixture for CNC lathes according to claim 1, characterized in that, The positioning disk has three air holes evenly distributed along the circumference on its end face, and the inner diameter of the air holes is 0.6 mm.

6. The workpiece clamping position detection fixture for CNC lathes according to claim 1, characterized in that, A first sealing ring is provided at the mating connection position between the hydraulic cylinder rod and the connecting seat.

7. The workpiece clamping position detection fixture for CNC lathes according to claim 1, characterized in that, A second sealing ring is provided at the air passage connection position between the connecting seat and the connecting plate, and at the air passage connection position between the connecting plate and the positioning plate.

8. The workpiece clamping position detection fixture for a CNC lathe according to claim 1, characterized in that, The hydraulic cylinder rod is threadedly connected to the high-speed hollow rotary hydraulic cylinder; the connecting seat is screwed to the rotary spindle head; the elastic inner support is threadedly connected to the connecting seat; the connecting plate is screwed to the connecting seat; the positioning plate is screwed to the connecting plate; and the pull stud is threadedly connected to the hydraulic cylinder rod.

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