Feed length sensor for a wire sheet forming machine

Abstract

Feed length sensor for a wire sheet forming machine, characterized in that it comprises: a receiving sensor (1) consisting of a threaded sleeve (11), a signal wire (12) and a telescopic head (13), wherein the threaded sleeve (11) is a hollow sleeve structure with a threaded structure projecting from a circumferential surface, wherein the telescopic head (13) extends telescopically from a front end surface, wherein a sensor element and the signal wire (12) are provided at the rear end in the threaded sleeve (11); a hardened internal threaded sleeve (2), wherein the hardened internal threaded sleeve (2) is provided on an outer surface of the threaded sleeve (11) of the receiving sensor (1) and is screwed to a front end of the receiving sensor (1), wherein a through hole is provided in the center of the end surface of the hardened internal threaded sleeve (2), wherein the telescopic head (13) extends through the through hole.

Description

TECHNICAL AREA The present utility model relates to the technical field of sensors, in particular a feed length sensor for a wire sheet forming machine. STATE OF THE ART In the production of wire sheet forming machines (clamping machines), the material must be fed forward at a specific length during processing. After bending and other processing steps, the material becomes a finished product. However, if the feed length is inaccurate, this affects the product dimensions. Excessive deviations lead to quality problems. Since the feed mechanism relies on mechanical pressing and pushing, structural wear or slippage can lead to unstable feed lengths. Currently, this is addressed by installing rigid limiting structures at the end of the feed stroke to prevent excessively long feeds. However, insufficient feeds due to slippage remain unavoidable. Remedial measures, such as replacing the pressing structure of the opening / closing mechanism or adjusting the pivot arm stroke, are only possible after the problem has been identified, resulting in a significant production run of defective products beforehand. Therefore, a novel feed length sensor for wire sheet forming machines is needed to solve these problems. CONTENTS OF THE PRESENT USE SAMPLE The purpose of this utility model is to provide a feed length sensor for a wire sheet forming machine. To achieve the above purpose, the present utility model provides the following technical solution: A feed length sensor for a wire sheet forming machine, comprising a receiving sensor and a hardened internally threaded sleeve, wherein the receiving sensor consists of a threaded sleeve, a signal wire and a telescopic head, wherein the threaded sleeve is a hollow sleeve structure with a threaded structure projecting from a circumferential surface, wherein the telescopic head extends telescopically from a front end surface, wherein a sensor element and the signal wire are provided at a rear end in the threaded sleeve, wherein the sensor element serves to detect a telescopic state of the telescopic head and to transmit electrical signals via the signal wire at the rear end;wherein the hardened internal threaded sleeve is provided on an outside of the threaded sleeve of the recording sensor and is screwed to a front end of the recording sensor, wherein a through hole is provided in the center of the end face of the hardened internal threaded sleeve, wherein the telescopic head extends through the through hole. As a further solution of the present utility model, a fastening nut is also provided on the outside of the threaded sleeve, which is screwed to the threaded sleeve. As a further solution of the present utility model, a conduit sleeve is clamped between the fastening nut and the hardened internal threaded sleeve, wherein the conduit sleeve comprises a washer clamped between the fastening nut and the hardened internal threaded sleeve and a conduit plate extending from the washer to the lower half at the front end of the hardened internal threaded sleeve, wherein the conduit plate is funnel-shaped at the front end of the hardened internal threaded sleeve. As a further solution of the present utility model, the washer is provided with a symmetrically arranged set of projecting limit clamps with an inclined surface, wherein a corresponding recess structure is provided on the end surface of the hardened internal thread sleeve. As a further solution of the present utility model, a bearing ball is rotatably provided at the front end of the conductor plate, wherein a curved surface of the bearing ball forms a funnel structure at the front end of the conductor plate. As a further solution of the present utility model, the conductor plate comprises a main conductor plate and an auxiliary conductor plate, wherein the main conductor plate is provided directly below the hardened internal threaded sleeve; while the auxiliary conductor plate is provided on both sides of the main conductor plate, wherein the length of the main conductor plate is greater than the length of the auxiliary conductor plate. As a further solution of the present utility model, the rotating shaft of the bearing ball is provided eccentrically on the main guide plate, wherein a torsion spring is attached to the rotating shaft to act on the bearing ball, so that the bearing ball is held at an initial angle with the eccentric direction pointing upwards. As a further solution of the present utility model, an inclined funnel surface is provided on an outer edge of the end surface of the hardened internal thread sleeve, which faces the center of the end surface. As a further solution of the present utility model, the inclined funnel surface on the end surface of the hardened internal threaded sleeve is provided with an opening on a top side. Beneficial effects 1. In the present utility model, a hardened internal threaded sleeve is provided on an outer surface of the threaded sleeve of the receiving sensor and screwed to a front end of the receiving sensor. A through-hole is provided in the center of the end face of the hardened internal threaded sleeve, and the telescopic head extends through this through-hole. The hardened internal threaded sleeve acts as a hard limiter to prevent excessive feed length. The telescopic head of the receiving sensor serves as an alarm signal source for short feed conditions. If the material feed is too short, the sensor signal remains unexcited, preventing the device from proceeding to the next action and triggering an alarm. Only when the signal is triggered does the device perform subsequent actions, thus preventing product defects due to insufficient material feed. 2.In the present utility model, a guide sleeve is clamped between the fastening nut and the hardened internal threaded sleeve. The guide sleeve comprises a washer clamped between the fastening nut and the hardened internal threaded sleeve and a guide plate extending from the washer to the lower half at the front end of the hardened internal threaded sleeve, the guide plate being funnel-shaped at the front end of the hardened internal threaded sleeve. The lower guide plate directs the end head of the advanced material towards the center, thus improving the limiting accuracy while simultaneously preventing sagging at the end head due to gravity. This prevents irregular wear on the end surface of the hardened internal threaded sleeve by the end head of the eccentric material during subsequent bending operations.In the present utility model, the rotating shaft of the bearing ball is eccentrically mounted on the main guide plate. A torsion spring is attached to the rotating shaft to act on the bearing ball, holding it at an initial angle with the eccentric direction pointing upwards. Due to this eccentric arrangement of the bearing ball on the main guide plate, the contact point between the bearing ball of the main guide plate and the material is located further from the axis of the sensor than the contact point between the bearing ball of the auxiliary guide plate and the material. This compensates for the sagging of the material's end head under the influence of gravity, thereby reducing the harsh contact between the bearing balls and the material and minimizing wear on the bearing balls.Simultaneously, the eccentric arrangement of the bearing balls induces an eccentric rotation when driven by material friction. This movement lifts the end head of the material, supports it, and aids in the centering of the end head. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a schematic representation of the overall structure of the present utility model. Fig. 2 shows a schematic exploded view of the overall structure of the present utility model. Fig. 3 shows a schematic representation of the structure of a recording sensor of the present utility model. Fig. 4 shows a schematic representation of the structure of a hardened internally threaded sleeve of the present utility model. Fig. 5 shows a schematic representation of the structure of a cable sleeve of the present utility model. Fig. 6 shows a schematic representation of the length of the main power plate and the auxiliary power plate of the present utility model. Fig. 7 shows a schematic exploded view of the structure of the cable sleeve of the present utility model. Fig. 8 shows a schematic representation of the structure of a bearing ball of the main power plate of the present utility model. In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8: 1. Receiving sensor; 11. Threaded sleeve; 12. Signal wire; 13. Telescopic head; 2. Hardened internal threaded sleeve; 3. Mounting nut; 4. Cable sleeve; 41. Washer; 42. Limit clamp; 43. Main cable plate; 44. Auxiliary cable plate; 45. Bearing ball; 46. Reset torsion spring. DETAILED DESCRIPTION The specific technical solutions of the present utility model are now described in detail in the accompanying drawings of the description of the present utility model with reference to Figs. 1, 2, 3, 4, 5, 6, 7 to 8. As shown in Figs. 1, 2, 3, 4, 5, 6, 7 to 8, Fig. 1 shows a schematic representation of the overall structure of the present utility model; Fig. 2 shows a schematic exploded view of the overall structure of the present utility model; Fig. 3 shows a schematic representation of the structure of a recording sensor of the present utility model; Fig. 4 shows a schematic representation of the structure of a hardened internal thread sleeve of the present utility model; Fig. 5 shows a schematic representation of the structure of a cable sleeve of the present utility model; Fig. 6 shows a schematic representation of the length of the main power plate and the auxiliary power plate of the present utility model; Fig. 7 shows a schematic exploded view of the structure of the cable sleeve of the present utility model; Fig.Figure 8 shows a schematic representation of the structure of a bearing ball of the main power plate of the present utility model. The present utility model provides a feed length sensor for a wire sheet forming machine, comprising a receiving sensor 1 and a hardened internally threaded sleeve 2, wherein the receiving sensor 1 consists of a threaded sleeve 11, a signal wire 12 and a telescopic head 13, wherein the threaded sleeve 11 is a hollow sleeve structure with a threaded structure projecting from a circumferential surface, wherein the telescopic head 13 extends telescopically from a front end surface, wherein a sensor element and the signal wire 12 are provided at a rear end in the threaded sleeve 11, wherein the sensor element serves to detect a telescopic state of the telescopic head 13 and to transmit electrical signals via the signal wire 12 at the rear end;wherein the hardened internal threaded sleeve 2 is provided on an outer side of the threaded sleeve 11 of the recording sensor 1 and is screwed to a front end of the recording sensor 1, wherein a through hole is provided in the center of the end face of the hardened internal threaded sleeve, wherein the telescopic head 13 extends through the through hole. The hardened internal thread sleeve 2 acts as a hard limiter to prevent excessive feed length. The telescopic head 13 of the sensor 1 serves as an alarm signal source for short feed conditions. If the material feed is too short, the sensor signal remains unactivated, preventing the device from proceeding to the next action and triggering an alarm. Only when the signal is triggered does the device execute subsequent actions, thus preventing product defects due to insufficient material feed. A fastening nut 3 is also provided on the outside of the threaded sleeve 11 and screwed to the threaded sleeve. This allows the hardened internal threaded sleeve 11 to be locked from the rear end, thus preventing it from loosening, while at the same time the position of the hardened internal threaded sleeve 2 can be adjusted to control the extension length of the telescopic head 13. In particular, a conduit sleeve 4 is clamped between the fastening nut 3 and the hardened internal threaded sleeve 2, wherein the conduit sleeve 4 comprises a washer 41 clamped between the fastening nut 3 and the hardened internal threaded sleeve 2 and a conduit plate extending from the washer 41 to the lower half at the front end of the hardened internal threaded sleeve 2, wherein the conduit plate has a funnel-shaped structure at the front end of the hardened internal threaded sleeve 2. The lower guide plate directs the end head of the advanced material towards the center, thus improving the limiting accuracy while simultaneously preventing sagging at the end head due to gravity. This prevents uneven wear on the end surface of the hardened internal thread sleeve 2 caused by the end head of the eccentric material during subsequent bending operations. Furthermore, the washer 41 is provided with a symmetrically arranged set of projecting limiting clamps 42 with an inclined surface, wherein a corresponding recess structure is provided on the end surface of the hardened internal threaded sleeve 2, thereby limiting the angle and the position between the conductor sleeve 4 and the hardened internal threaded sleeve 2, thereby improving its conductivity. Furthermore, a bearing ball 45 is rotatably provided at the front end of the conductor plate, wherein a curved surface of the bearing ball 45 forms a funnel structure at the front end of the conductor plate, thereby reducing wear due to rolling friction of the bearing ball 45 and extending the service life of the conductor plate. Furthermore, the conductor plate comprises a main conductor plate 43 and an auxiliary conductor plate 44, wherein the main conductor plate 43 is provided directly below the hardened internal threaded sleeve 2; while the auxiliary conductor plate 44 is provided on both sides of the main conductor plate 43, wherein the length of the main conductor plate 43 is greater than the length of the auxiliary conductor plate 44. This preferentially brings the bearing ball 45 into contact with the material on the guide plate 43, counteracting the tendency of the material's end head to sag under the influence of gravity. This initially guides and centers the direction most susceptible to eccentricity. Furthermore, the rotating shaft of the bearing ball 45 is provided eccentrically on the main guide plate 43, with a torsion spring being attached to the rotating shaft to act on the bearing ball 45, so that the bearing ball 45 is held at an initial angle with the eccentric direction pointing upwards. Due to the eccentric arrangement of the bearing ball 45 on the main guide plate 43, the contact point between the bearing ball 45 of the main guide plate 43 and the material is located further from the axis of the recording sensor 1 than the contact point between the bearing ball 45 of the auxiliary guide plate 44 and the material. This compensates for the sagging of the material's end head under the influence of gravity, thereby reducing the hard contact between the bearing balls 45 and the material and minimizing wear on the bearing balls 45. Simultaneously, the eccentric arrangement of the bearing balls 45 induces an eccentric rotation when driven by material friction. This movement lifts the material's end head, supports it, and aids in its centering. An inclined funnel surface is provided on an outer edge of the end face of the hardened internal thread sleeve 2, facing the center of the end face. The inclined funnel surface is used to center the end head of the material, thereby reducing eccentricity-related errors in the limiting length of the material and improving the release precision of the material for the telescopic head 13. In particular, the inclined funnel surface at the end surface of the hardened internal threaded sleeve 2 is provided with an opening on a top side. This creates an outlet opening for the inclined funnel surface at the end face of the hardened internal threaded sleeve 2, which facilitates material outlet and prevents excessive wear between the material end face and the inclined funnel surface during subsequent bending operations. This ensures the concentric positioning accuracy of the inclined funnel surface. In the implementation of the technical solution described in this embodiment, the wire material is driven by the feed mechanism and moves along a predetermined path to the sensor position. Upon contact between the end of the wire material and the telescopic head 13, the telescopic head retracts and then rests against the end face of the hardened internal threaded sleeve 2 to limit the feed length and prevent excessive feed. The telescopic head 13 of the receiving sensor 1 serves as an alarm signal source for short feed conditions. If the material feed is too short, the sensor signal remains unexpressed, preventing the device from proceeding to the next action and triggering an alarm. Only when the signal is triggered does the device execute subsequent actions, thus preventing product defects due to insufficient material feed.

Claims

Feed length sensor for a wire sheet forming machine, characterized in that it comprises: a receiving sensor (1) consisting of a threaded sleeve (11), a signal wire (12) and a telescopic head (13), wherein the threaded sleeve (11) is a hollow sleeve structure with a threaded structure projecting from a circumferential surface, wherein the telescopic head (13) extends telescopically from a front end surface, wherein a sensor element and the signal wire (12) are provided at the rear end in the threaded sleeve (11); a hardened internal threaded sleeve (2), wherein the hardened internal threaded sleeve (2) is provided on an outside of the threaded sleeve (11) of the receiving sensor (1) and is screwed to a front end of the receiving sensor (1), wherein a through hole is provided in the center of the end surface of the hardened internal threaded sleeve (2), wherein the telescopic head (13) extends through the through hole. Feed length sensor for a wire sheet forming machine according to claim 1, characterized in that a fastening nut (3) is further provided on the outside of the threaded sleeve (11), which is screwed to the threaded sleeve (11). Feed length sensor for a wire sheet forming machine according to claim 2, characterized in that a cable sleeve (4) is clamped between the fastening nut (3) and the hardened internal threaded sleeve (2), wherein the cable sleeve (4) comprises a washer (41) clamped between the fastening nut (3) and the hardened internal threaded sleeve (2) and a cable plate extending from the washer (41) to the lower half at the front end of the hardened internal threaded sleeve (2), wherein the cable plate is funnel-shaped at the front end of the hardened internal threaded sleeve (2). Feed length sensor for a wire sheet forming machine according to claim 3, characterized in that the washer (41) is provided with a symmetrically arranged set of projecting limit clamps (42) with an inclined surface, wherein a corresponding recess structure is provided on the end surface of the hardened internal threaded sleeve (2). Feed length sensor for a wire sheet forming machine according to claim 3, characterized in that a bearing ball (45) is rotatably provided at the front end of the conductor plate, wherein a curved surface of the bearing ball (45) forms a funnel structure at the front end of the conductor plate. Feed length sensor for a wire sheet forming machine according to claim 5, characterized in that the conductor plate comprises a main conductor plate (43) and an auxiliary conductor plate (44), wherein the main conductor plate (43) is provided directly below the hardened internal threaded sleeve (2); while the auxiliary conductor plate (44) is provided on both sides of the main conductor plate (43), wherein the length of the main conductor plate (43) is greater than the length of the auxiliary conductor plate (44). Feed length sensor for a wire sheet forming machine according to claim 6, characterized in that the rotating shaft of the bearing ball (45) is provided eccentrically on the main guide plate (43), wherein a torsion spring is mounted on the rotating shaft to act on the bearing ball (45) so that the bearing ball (45) is held at an initial angle with the eccentric direction upwards. Feed length sensor for a wire sheet forming machine according to claim 1, characterized in that an inclined funnel surface is provided on an outer edge of the end surface of the hardened internal threaded sleeve (2), which is directed towards the center of the end surface. Feed length sensor for a wire sheet forming machine according to claim 8, characterized in that the inclined funnel surface at the end surface of the hardened internal threaded sleeve (2) is provided with an opening on a top side.

Images