Accurate cutting device for track link section machining

Abstract

The invention relates to the technical field of caterpillar track section machining, in particular to an accurate cutting device for caterpillar track section machining, which comprises a clamping table, a feeding motor, a feeding gear, a feeding rack, a movable cutter, a fixed cutter, a clamping block, a limiting module, a guide module and a storage box, the guide module comprises a discharging box and a discharging motor, the discharging box is located below the fixed cutter, the discharging motor is installed on the right side of the discharging box, the storage box comprises a defective product bin and a high-quality product bin, and an induction plate limits the length of a bar extending out of the fixed cutter and senses the flatness of the extending end face of the bar. The discharging box is driven by a discharging motor to discharge workpieces with poor flatness and qualified workpieces into a defective product bin and a high-quality product bin respectively; according to the method, the limiting device is used for controlling the length of the blank workpiece, meanwhile, the flatness of the end face of the bar is detected, and the detected bar is subjected to stage treatment, so that the effects of guaranteeing the flatness of the end face of the bar and reducing bar waste are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of track link processing, and specifically provides a fine cutting device for track link processing. Background Art

[0002] Track links are common parts of construction machinery, and the crawler formed by connecting them is commonly used in heavy machinery such as excavators, bulldozers, and tanks; the normal operation of the crawler requires the participation of all track links, so the control of the processing quality of track links is usually very strict; at the beginning of track link processing, the bar material needs to be sheared into blank workpieces of calibrated specifications.

[0003] Common shearing devices consist of a feeding structure, a fixed knife structure, and a moving knife structure, and their working principle is as follows: the feeding structure clamps and pushes the bar material in a directional manner, the pushed bar material enters the fixed knife structure and extends out from the fixed knife structure, and the moving knife slides towards the fixed knife side to cut the extended bar material, thereby obtaining blank workpieces; the above is the basic composition of the shearing device, which can achieve cutting in track link processing. However, it can be foreseen that the length of the blank workpieces processed in this way is not stable, and the reasons are as follows: the length of the bar material extending out of the fixed knife each time (i.e., the length of the blank workpiece) is limited by the moving distance of the feeding structure, and the feeding structure usually uses a motor as the power source and is driven by the meshing of gears and racks. Therefore, the number of rotations of the motor directly determines the length of the blank workpiece. The accuracy of this soft control is affected by many factors. Most obviously, as the shearing continues, the weight of the bar material is continuously decreasing, and correspondingly, the inertia of the bar material is also decreasing. Therefore, the braking distance of the motor driving the bar material is continuously increasing, which also causes the length of the blank workpiece to be continuously increasing.

[0004] The prior art usually adds a limiting structure at the extending end of the bar material to rigidly control the length of the bar material extending out of the fixed knife, so as to make the length of the blank workpieces consistent; the above method can make the length of the blank workpieces more stable. However, the cutting of the bar material is usually carried out in a cold working manner. Therefore, defects such as bending, burrs, and cracks will inevitably occur on the end face of the bar material, resulting in an uneven end face. As a result, after the limiting structure is limited, the bar material extending out of the fixed knife is either long or short; therefore, in the process of track link processing, due to the inability to ensure the flatness of the end face of the bar material, the phenomenon of inconsistent lengths of blank workpieces will still occur.

[0005] Therefore, a fine cutting device for track link processing is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a fine cutting device for track link processing, which solves the problem of inability to ensure the flatness of the end face of the bar material. By using a limiting device to control the length of the blank workpiece while detecting the flatness of the end face of the bar material and classifying the bar material after detection, the effect of ensuring the flatness of the end face of the bar material and reducing bar material waste is achieved.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A fine cutting device for processing track links, used to cut a bar into workpieces, includes a clamping table, a feeding motor, a feeding gear, a feeding rack, a moving knife, a fixed knife, a clamping block, a limiting module, a guiding module and a storage box. The limiting module includes an induction plate, which is located on the front side of the fixed knife. The guiding module includes a discharge box and a discharge motor. The discharge box is located below the fixed knife, and the discharge motor is installed on the right side of the discharge box. The storage box is installed on the lower side of the discharge box, and the storage box includes a defective product bin and a high-quality product bin; the induction plate limits the length of the bar protruding from the fixed knife and senses the flatness of the protruding end face of the bar. The discharge box is driven by the discharge motor to discharge the workpieces with poor flatness and qualified ones into the defective product bin and the high-quality product bin respectively.

[0009] The function of the induction plate is to detect whether the end face of the bar is flat. The usual method is to use strain gauges. By the consistency of the deformation degree (i.e., the feedback value) of each strain gauge, it is judged whether the end face of the bar is flat. However, in this environment, the applicability of the strain gauges is not high, because a large amount of heat will be generated at the end face during the cutting process of the bar, which will increase the temperature of the end face, and this temperature will increase with the increase of the mechanical strength and diameter of the bar. And the strain gauges have the phenomenon of temperature drift. Although the bridge compensation method can be used to suppress it, it will make the structure of the induction plate more complex and difficult to adapt to the high-intensity and high-frequency impacts of the fine cutting device;

[0010] Preferably, the limiting module further includes a connecting sleeve. A concave portion is provided at the rear end of the connecting sleeve. The rear end face of the induction plate is flat, and a convex portion is provided at the front end of the induction plate. The convex portion is connected to the concave portion, and both the convex portion and the concave portion are provided with spherical structures;

[0011] In the above solution, through the connection of the convex portion and the concave portion, a universal joint structure is formed, so that the induction plate can completely coincide with the end face of the bar. By detecting the attitude of the induction plate, the flatness of the end face of the bar can be obtained; the structure of the pure mechanical structure makes the induction plate immune to the influence of the temperature of the end face of the bar, thus realizing the accurate measurement of the flatness.

[0012] In the prior art, a limiting structure is fixedly connected, so that it is in rigid contact with the end face of the bar. Although such a setting has a simple structure, the limiting structure will be affected by high-frequency and high-intensity impacts, thus affecting its effective service life;

[0013] Preferably, the limiting module further includes a sliding sleeve and a buffer spring. The sliding sleeve wraps the front end of the connecting sleeve. The buffer spring is installed between the sliding sleeve and the connecting sleeve. A retaining ring is provided on the outer circle of the connecting sleeve;

[0014] In the above solution, a buffer spring is installed between the sliding sleeve and the connecting sleeve, thereby changing the rigid contact between the end face of the bar stock and the induction plate into a flexible contact, so as to protect the universal joint structure of the convex part and the concave part, and make the measurement result of the flatness of the end face of the bar stock by the induction plate more accurate.

[0015] Preferably, the induction plate further includes a balance rod, the balance rod is connected to the front side of the convex part, and a reflector is installed on the front end face of the balance rod, and a probe is installed inside the sliding sleeve;

[0016] In the above solution, a single probe is used for measurement. If the probe can receive the signal reflected by the reflector, the flatness of the end face of the bar stock is qualified; if it cannot receive the signal, it is unqualified. The balance rod has the following advantages: 1) The induction plate does not tilt in the natural state, so as to contact the end face of the bar stock more smoothly (the unevenness of the end face of the bar stock is an accidental phenomenon, so in most cases, the non-tilting induction plate will contact the flat end face of the bar stock over a large area to reduce impact); 2) The measurement is more sensitive and accurate. If the balance rod is not provided and the reflector is directly installed on the front side of the convex part, the range of movement of the reflector following the convex part is limited. However, by extending the rotation radius of the reflector through the balance rod, when the induction plate only tilts slightly following the end face of the bar stock, the emitter can also move significantly, so that the detection of the probe is more accurate.

[0017] In the prior art, during the cutting process of the bar stock, the limiting structure will also keep in contact with the end face of the bar stock, resulting in friction. This friction has the following effects: 1) The end face of the cut workpiece has defects, affecting the subsequent processing of the track link; 2) The end face of the induction plate is worn, affecting the measurement accuracy of the flatness of the end face of the bar stock;

[0018] Preferably, the limiting module further includes a top plate, a stopper and a yielding spring. The top plate is slidably connected to the fixed knife, the sliding sleeve is slidably connected to the top plate, a resistance cavity is formed inside the sliding sleeve, the resistance cavity is located behind the probe, two stoppers are respectively installed on the left and right sides of the resistance cavity, the yielding spring is installed between the stopper and the sliding sleeve, the front end of the balance rod is in a frustum shape, the adjacent surfaces of the two stoppers are inclined surfaces, a push rod is connected above the stopper, a stepped plate is connected below the top plate, and the stepped plate is located between the two push rods. From front to back, the width of the stepped plate gradually increases;

[0019] In the above solution, after the bar stock is limited (i.e., the retaining ring contacts the sliding sleeve), the sliding sleeve continues to slide forward a certain distance on the top plate, so that a gap is generated between the induction plate and the end face of the bar stock, thereby preventing friction between the end face and the induction plate during the cutting process of the bar stock; and through the cooperation of the stop block and the conical structure at the front end of the balance rod, the contracted yield spring is compressed to prevent the induction plate from resetting backward during the forward movement of the sliding sleeve, thereby shortening the forward movement distance of the sliding sleeve, which not only reduces the energy consumption of the forward movement of the sliding sleeve, but also reduces the wear between the sliding sleeve and the top plate, making the precision cutting device operate more stably and accurately.

[0020] If defective materials continue to be used in production, quality problems will occur during the use of the formed track links. Therefore, in actual production, to ensure the quality of products, defective workpieces are usually scrapped. However, the defective parts on the workpieces are limited. Scrapping the entire workpiece at once will increase the scrap rate of the bar stock.

[0021] Preferably, a mid-stop area and a trimming area are respectively provided at the rear end of the sliding sleeve and the front end of the fixed knife. The feeding motor stops twice during one feeding process: the first stop of the feeding motor occurs when the front end of the bar stock enters the mid-stop area, and the second stop of the feeding motor occurs when the retaining ring contacts the sliding sleeve or the front end of the bar stock enters the trimming area.

[0022] In the above solution, by the first stop of the feeding motor, it is judged whether the end face of the bar stock is flat; by the second stop of the feeding motor, the bar stock is limited, or the bar stock is retracted towards the fixed knife, and only the defective part extends out. Then, after cutting, qualified workpieces or small sections of waste products can be obtained, thereby reducing the scrap rate of the bar stock while ensuring the same length of the workpieces.

[0023] Preferably, the discharge box has two rotation directions: one is that the discharge box remains vertical and the opening faces the fine product bin, and the other is that the discharge box deviates from the vertical direction and the opening faces the defective product bin.

[0024] In the above solution, the opening of the discharge box in the natural state (i.e., the vertical state) faces the fine product bin, and the opening faces the defective product bin when it is tilted driven by the discharge motor; obviously, most of the workpieces cut by the precision cutting device are qualified products. Such a setting can reduce the number of operations of the discharge motor, thereby reducing its energy consumption.

[0025] If it is detected that the end face of the bar stock is not flat, it means that the previously cut workpiece is defective. Therefore, the previously cut workpiece should be discharged to the defective product bin; a common method is to arrange an opening and closing device inside the discharge box to temporarily store the cut workpiece inside the discharge box, and then discharge it after the flatness of the end face of the bar stock is detected; however, such a setting requires the opening and closing device to open and close frequently, and its continuous energy consumption and the stability of the structure need to be optimized.

[0026] Preferably, the discharge box includes a support plate, a return spring and a baffle. The support plate includes a long plate and a short plate. The long plate is slidably connected to the right inner wall of the discharge box. The short plate is connected above the long plate. The return spring is installed between the long plate and the discharge box. The baffle is rotatably connected to the front and rear walls of the discharge box, and a gear structure is provided on the right side of the baffle. A rack structure is provided at the lower part of the long plate, and the rack structure of the long plate meshes with the gear structure of the baffle. A protrusion is provided on the left inner wall of the discharge box. In the natural state, the height position of the short plate is within the height position range of the protrusion of the discharge box;

[0027] In the above solution, the kinetic energy of the workpiece falling drives the support plate, and then the baffle is opened so that the workpiece stored on the baffle is discharged, thereby realizing the effect of discharging the workpieces one by one. Such a design does not require an additional power source and control signal, simplifies the structure of the fine cutting device, makes the operation more stable, and reduces the production cost.

[0028] Preferably, the upper side of the baffle is provided with an inclined surface inclined in the front-rear direction, and a through hole is provided on the discharge box. The through hole is located on the box wall of the discharge box adjacent to the high end of the inclined surface of the baffle;

[0029] In the above solution, through the cooperation of the inclined surface of the baffle and the through hole, the defective workpieces are discharged to the defective product bin; when it is detected that the end face of the bar stock is uneven, the discharge motor drives the discharge box to tilt, so that the defective workpieces slide out from the through hole along the inclined surface of the baffle and are discharged to the defective product bin.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. By setting the induction plate, while limiting the bar stock, the universal connection of the induction plate is used to detect the flatness of the end face of the bar stock. And the feeding motor sends the qualified workpieces to full limit according to the detection result, and recovers the defective workpieces to the fixed cutting edge for grading and shearing, so as to obtain qualified workpieces and small pieces of defective products, thereby reducing the amount of defective products of the bar stock.

[0032] 2. By setting the balance rod on the induction plate, the induction plate in the natural state does not tilt, and then contacts the end face of the bar stock over a large area, thereby reducing the impact of the bar stock on the induction plate. At the same time, the rotation radius of the reflection sheet on the induction plate can be extended, so that the detection of the tilt angle of the induction plate by the probe is more accurate and sensitive; and through the cooperation of the balance rod and the block, the compressed yield spring is limited to suppress the rebound of the induction plate during the separation from the end face of the bar stock, thereby reducing the displacement of the sliding sleeve during the separation process, reducing energy consumption and reducing wear between structures.

[0033] 3. With the setting of the discharge box in the present invention, the qualified workpieces and defective workpieces after grading and shearing are respectively discharged into the high-quality product bin and the defective product bin; through the meshing of the support plate rack and the baffle gear, the workpieces falling later can discharge the workpieces falling earlier, so as to discharge the qualified workpieces towards the high-quality product bin, and through the setting of the baffle inclined surface, the defective workpieces are discharged from the through hole to the defective product bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall front-right isometric structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the limiting module structure of the present invention;

[0036] Figure 3 It is a schematic diagram of the guiding module structure of the present invention;

[0037] Figure 4 It is a schematic diagram of the overall rear-left isometric structure of the present invention;

[0038] Figure 5 It is a schematic diagram of the detection state of the qualified workpieces of the present invention;

[0039] Figure 6 It is a schematic diagram of the detection state of the defective workpieces of the present invention;

[0040] Figure 7 It is a schematic diagram of the complete limiting state of the workpieces of the present invention;

[0041] Figure 8 It is a schematic diagram of the shearing state of the present invention;

[0042] Figure 9 It is a schematic diagram of the state where the workpieces enter the discharge box of the present invention;

[0043] Figure 10 It is a schematic diagram of the state where the workpieces are discharged from the discharge box of the present invention.

[0044] In the figure: 1. Clamping table; 2. Feeding motor; 3. Feeding gear; 4. Feeding rack; 5. Moving knife; 6. Fixed knife; 7. Clamping block; 8. Limiting module; 81. Induction plate; 811. Convex part; 812. Balance rod; 813. Reflective sheet; 82. Connecting sleeve; 821. Concave part; 822. Retaining ring; 83. Sliding sleeve; 831. Probe; 832. Resistance cavity; 84. Buffer spring; 85. Top plate; 851. Step plate; 86. Stopper; 861. Push rod; 87. Yielding spring; 9. Guiding module; 91. Discharge box; 911. Support plate; 9111. Long plate; 9112. Short plate; 912. Return spring; 913. Baffle; 914. Through hole; 92. Discharge motor; 10. Storage box; 101. Defective product bin; 102. High-quality product bin; 11. Middle stop area; 12. Trimming area; 13. Bar stock; 14. Workpiece. Detailed implementation mode

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] Please refer to Figures 1 to 10 , the present invention provides a fine cutting device for track link processing, and the technical solution is as follows:

[0047] A fine cutting device for track link processing is used to cut a bar stock 13 into workpieces 14, and includes a clamping table 1, a feeding motor 2, a feeding gear 3, a feeding rack 4, a moving knife 5, a fixed knife 6, a clamping block 7, a limiting module 8, a guiding module 9 and a storage box 10; the clamping table 1 is installed on the machine frame, and a sliding rail is installed on the machine frame, and a slider is installed on the clamping table 1 to realize the sliding of the clamping table 1 on the machine frame, so as to complete the conveying of the bar stock 13. The clamping table 1 is an opening and closing mechanism, usually with a cylinder as the actuator, which is clamped when conveying the bar stock 13 and relaxed when cutting the bar stock 13, so that the rear end of the bar stock 13 is not restricted, thereby avoiding the bending deformation of the bar stock 13; the feeding motor 2 is installed on the clamping table 1, the feeding gear 3 is installed on the output shaft of the feeding motor 2, the feeding rack 4 is installed on the side of the machine frame, and the feeding rack 4 meshes with the feeding gear 3. When the feeding motor 2 rotates, it drives the clamping table 1 to slide on the machine frame, and the feeding motor 2 has a bidirectional rotation function to circulate and convey the bar stock 13; the limiting module 8 includes an induction plate 81, and the induction plate 81 is located in front of the fixed knife 6. The guiding module 9 includes a discharge box 91 and a discharge motor 92. The discharge box 91 is located below the fixed knife 6, the discharge motor 92 is installed on the right side of the discharge box 91, and the storage box 10 is installed below the discharge box 91. The storage box 10 includes a defective product bin 101 and a high-quality product bin 102; the induction plate 81 limits the length of the bar stock 13 extending from the fixed knife 6 and senses the flatness of the end face of the bar stock 13 extending. The discharge box 91 is driven by the discharge motor 92 to discharge the workpieces 14 with poor flatness and qualified ones into the defective product bin 101 and the high-quality product bin 102 respectively.

[0048] As an implementation mode of the present invention, refer to Figure 1 and Figure 2, the limit module 8 further includes a connecting sleeve 82, a sliding sleeve 83 and a buffer spring 84. A recess 821 is provided at the rear end of the connecting sleeve 82. The rear end face of the induction plate 81 is flat, and a convex portion 811 is provided at the front end of the induction plate 81. The convex portion 811 is connected to the recess 821, and both the convex portion 811 and the recess 821 are provided as spherical structures. The sliding sleeve 83 wraps the front end of the connecting sleeve 82. The buffer spring 84 is installed between the sliding sleeve 83 and the connecting sleeve 82. A retaining ring 822 is provided on the outer circumference of the connecting sleeve 82. The connecting sleeve 82 adopts an up-and-down split design for convenient installation of the convex portion 811. When manufacturing the connecting sleeve 82, the central rod of the buffer spring 84 is welded to the front end of each part. The sliding sleeve 83 adopts a left-and-right split design for convenient installation of the probe 831 and the slider. The installation process of the internal parts of the sliding sleeve 83 is as follows: first, install the convex portion 811 on the upper or lower part of the connecting sleeve 82, then merge the two parts of the connecting sleeve 82 and complete the bolt connection. Next, install the two stoppers 86 on the left and right parts of the sliding sleeve 83 respectively, then merge the two parts of the sliding sleeve 83 and complete the bolt connection. Finally, install the buffer spring 84 on the central rod at the front end of the connecting sleeve 82 and insert the connecting sleeve 82 into the sliding sleeve 83.

[0049] As an embodiment of the present invention, referring to Figure 2 , the induction plate 81 further includes a balance rod 812. The balance rod 812 is connected to the front side of the convex portion 811, and a reflector 813 is installed on the front end face of the balance rod 812. A probe 831 is installed inside the sliding sleeve 83. Diffuse reflection treatment of the balance rod 812; at the beginning of the design, through the balance of the weight of the balance rod 812, the rear end face of the induction plate 81 does not tilt. This state will change with the increase of the working years of the precision cutting device, but this change will not affect the measurement of the flatness of the end face of the bar stock 13. Therefore, if the induction plate 81 tilts in the natural state, it does not mean that it needs to be replaced, and its replacement cycle can be determined according to the wear conditions of the convex portion 811 and the recess 821. In addition, to ensure the reflection effect of the reflector 813 on the light source of the probe 831 and improve the measurement accuracy of the flatness of the end face of the bar stock 13, the surrounding area of the installation position of the reflector 813 is subjected to diffuse reflection treatment.

[0050] As an embodiment of the present invention, referring to Figure 1 、 Figure 2 、 Figures 5 to 8, the limiting module 8 further includes a top plate 85, a stopper 86 and a yielding spring 87. The top plate 85 is slidably connected to the fixed knife 6, and the sliding sleeve 83 is slidably connected to the top plate 85. A resistance cavity 832 is formed inside the sliding sleeve 83, and the resistance cavity 832 is located at the rear side of the probe 831. Two stoppers 86 are respectively installed on the left and right sides of the resistance cavity 832, and the yielding spring 87 is installed between the stopper 86 and the sliding sleeve 83. The front end of the balance rod 812 is in a frustum shape. The adjacent surfaces of the two stoppers 86 are inclined surfaces, and the taper of the inclined surface of the stopper 86 is the same as the taper of the frustum of the balance rod 812 to ensure the stability of their contact. A push rod 861 is connected above the stopper 86, and a stepped plate 851 is connected below the top plate 85, and the stepped plate 851 is located between the two push rods 861. The width of the stepped plate 851 gradually increases from front to back; a middle stop area 11 and a trimming area 12 are respectively provided at the rear end of the sliding sleeve 83 and the front end of the fixed knife 6. The feeding motor 2 stops twice during one feeding process: the first stop of the feeding motor 2 occurs when the front end of the bar stock 13 enters the middle stop area 11, and the second stop of the feeding motor 2 occurs when the retaining ring 822 contacts the sliding sleeve 83 or the front end of the bar stock 13 enters the trimming area 12;

[0051] Sliders are installed on the top plate 85, and slide rails are installed on the fixed knife 6 to realize the sliding of the top plate 85 on the fixed knife 6. The position of the top plate 85 is fixed, so the length of the workpiece 14 is determined. Therefore, during production, the length of the sheared workpiece 14 can be controlled by adjusting the top plate 85 back and forth to meet the processing of different specifications of chain track joints; similarly, sliders and slide rails are respectively installed above the sliding sleeve 83 and below the top plate 85 to realize the reciprocating sliding of the sliding sleeve 83 on the top plate 85, so as to leave a gap between the end face of the bar stock 13 and the induction plate 81 during the shearing process, thus avoiding friction. To control the sliding of the sliding sleeve 83, a cylinder is installed at the rear end of the sliding sleeve 83;

[0052] The limiting module 8 has the following two working processes: 1) Refer to Figure 5 , when the end face of the bar stock 13 enters the middle stop area 11, at this time, the end face of the bar stock 13 coincides with the end face of the induction plate 81, and the induction plate 81 is not inclined, so the workpiece 14 is a qualified product. Then, the feeding motor 2 continues to feed the bar stock 13 until Figure 7 In the state shown, the retaining ring 822 contacts the sliding sleeve 83, and the feeding motor 2 stops feeding. However, at this time, the end face of the bar stock 13 is in close contact with the end face of the induction plate 81. If shearing is directly performed, it will cause wear to the end face of the workpiece 14 and the surface of the induction plate 81. Therefore, the cylinder is used to push the sliding sleeve 83 forward, so that a gap is generated between the induction plate 81 and the end face of the bar stock 13 (refer to Figure 8), and during the movement of the sliding sleeve 83, the push rod 861 keeps in contact with the step plate 851, and in the process of moving forward, the front end of the balance rod 812 is blocked by the action of the yield spring 87 to inhibit the sensor plate 81 from resetting backward during the forward movement of the sliding sleeve 83, thereby shortening the forward movement distance of the sliding sleeve 83; when limiting the workpiece 14 again, the cylinder pulls the sliding sleeve 83 backward, and the push rod 861 contacts the step plate 851 and pushes the block 86 to the left and right sides, so that the front end of the balance rod 812 is separated from the blocking chamber 832 to achieve the reset of the sensor plate 81; 2) refer to Figure 6 , the end face of the bar 13 enters the stop zone 11, at which time the end face of the bar 13 coincides with the end face of the induction plate 81, and the induction plate 81 is tilted, so the workpiece 14 is a waste, so the feeding motor 2 retracts the bar 13 until the end face of the bar 13 enters the trimming zone 12 (refer to Figure 1 ), then the movable knife 5 moves right to cut off the defective bar 13.

[0053] As an embodiment of the present invention, refer to Figure 1 and Figure 4 The discharge box 91 has two rotation directions: in one, the discharge box 91 remains vertical and opens toward the fine product warehouse 102; in the other, the discharge box 91 deviates from the vertical direction and opens toward the defective product warehouse 101. In this method, the defective product warehouse 101 is arranged on the rear side of the fine product warehouse 102. When the discharge motor 92 is not started, the discharge box 91 remains vertical. When the discharge motor 92 is started, it drives the outlet below the discharge box 91 to rotate backward.

[0054] As an embodiment of the present invention, refer to Figure 3 , Figure 4 , Figure 9 and Figure 10, the discharge box 91 includes a support plate 911, a return spring 912 and a baffle 913. The support plate 911 includes a long plate 9111 and a short plate 9112. The long plate 9111 is slidably connected to the right inner wall of the discharge box 91. The short plate 9112 is connected above the long plate 9111, and the angle between the short plate 9112 and the long plate 9111 is an acute angle to reduce the impact of the workpiece 14 on the connection between the long plate 9111 and the short plate 9112. The return spring 912 is installed between the long plate 9111 and the discharge box 91. The baffle 913 is rotatably connected to the front and rear walls of the discharge box 91, and a gear structure is provided on the right side of the baffle 913. A rack structure is provided at the lower part of the long plate 9111, and the rack structure of the long plate 9111 meshes with the gear structure of the baffle 913. A section of protrusion is provided on the left inner wall of the discharge box 91. In the natural state, the position height of the short plate 9112 is within the position height range of the protrusion of the discharge box 91; the upper side of the baffle 913 is set as an inclined plane inclined in the front-rear direction. A through hole 914 is provided on the discharge box 91, and the through hole 914 is located on the box wall of the discharge box 91 adjacent to the high end of the inclined plane of the baffle 913; in this method, the high end of the inclined plane of the baffle 913 is at the rear, so the through hole 914 is provided on the rear box wall of the discharge box 91;

[0055] The guiding module 9 has the following two discharging methods: 1) Refer to Figure 9 , after the workpiece 14 falls into the discharge box 91, it is received by the baffle 913 and will not be directly discharged from the discharge box 91. At this time, the sensing plate 81 detects the flatness of the end face of the bar stock 13. If the detection is qualified, a new workpiece 14 falls. When the new workpiece 14 falls, it drives the support plate 911 to move downward, and then drives the baffle 913 to rotate downward, so that the previously fallen workpiece 14 is discharged (refer to Figure 10 ), and then the baffle 913 resets under the action of the return spring 912 to close the outlet of the discharge box 91 again to receive the new workpiece 14; 2) After the workpiece 14 falls into the discharge box 91, it is received by the baffle 913 and will not be directly discharged from the discharge box 91. At this time, the sensing plate 81 detects the flatness of the end face of the bar stock 13. If the detection is unqualified, defective waste falls. At this time, the discharge motor 92 drives the discharge box 91 to rotate so that the through hole 914 is aligned with the defective product bin 101, so that the waste products and waste materials are discharged into the defective product bin 101 (refer to Figure 4 ).

[0056] Working principle: In the present invention, the sensing plate 81 is used to limit the bar stock 13 and detect the flatness of the end face, so that the length of the workpiece 14 obtained by each shearing of the precision cutting device is consistent; when the shearing causes end face defects, resulting in an uneven end face and affecting the consistency of the length of the workpiece 14, the present invention first cuts off the defective part on the bar stock 13 until a flat end face of the bar stock 13 is obtained, and then limits and shears the bar stock 13; and the qualified workpieces 14 and defective workpieces 14 are respectively discharged into the high-quality product bin 102 and the defective product bin 101 through the discharge box 91;

[0057] Specifically, in order to detect the flatness of the end face of the bar stock 13, a concave portion 821 is provided at the rear end of the connecting sleeve 82, a convex portion 811 is provided at the front end of the sensing plate 81, and both the convex portion 811 and the concave portion 821 are provided as spherical shapes, so that after the convex portion 811 and the concave portion 821 are connected, a universal joint structure is formed, so that the sensing plate 81 fits the end face of the bar stock 13. By whether the probe 831 receives the reflected signal from the reflector 813 on the sensing plate 81, it can be judged whether the sensing plate 81 is tilted, and then whether the end face of the bar stock 13 is flat;

[0058] In order to protect the universal connection between the sensing plate 81 and the connecting sleeve 82 and make the end face of the bar stock 13 in flexible contact with the sensing plate 81; specifically, the connecting sleeve 82 is inserted into the sliding sleeve 83, and a buffer spring 84 is installed between the connecting sleeve 82 and the sliding sleeve 83;

[0059] In order to measure the flatness of the end face of the bar stock 13 more accurately and sensitively, a balance bar 812 is installed on the sensing plate 81, and the reflector 813 is installed on the end face of the protruding end of the balance bar 812, so as to increase the rotation radius of the reflector 813, so that when the sensing plate 81 only follows the end face of the bar stock 13 and tilts slightly, the emitter can also move greatly, so that the detection of the probe 831 is more accurate;

[0060] In order to avoid the friction between the end face of the bar stock 13 and the sensing plate 81 during the shearing process, the sliding sleeve 83 slides on the top plate 85 so that a gap is generated between the end face of the bar stock 13 and the sensing plate 81. In order to reduce the sliding amount of the sliding sleeve 83 to reduce energy consumption and reduce the wear between structures, a resistance cavity 832 is opened inside the sliding sleeve 83, and two stoppers 86 are respectively installed on the left and right sides of the resistance cavity 832. Through the cooperation between the stopper 86 and the frustum structure at the front end of the balance bar 812, the contracted yielding spring 87 is compressed to prevent the sensing plate 81 from resetting backward during the forward movement of the sliding sleeve 83;

[0061] To avoid waste of the bar stock 13, only the defective part of the bar stock 13 is cut off; by the first shutdown of the feeding motor 2, it is judged whether the end face of the bar stock 13 is flat; by the second shutdown of the feeding motor 2, the positioning of the bar stock 13 is completed, or the bar stock 13 is retracted towards the fixed cutter 6, and only the defective part extends out. Then, after cutting, qualified workpieces 14 or small pieces of waste products can be obtained, thereby reducing the amount of waste products of the bar stock 13 while ensuring the consistent length of the workpieces 14.

[0062] To separately discharge the qualified workpieces 14 and the defective workpieces 14 into the high-quality product warehouse 102 and the defective product warehouse 101 respectively, through the engagement of the rack of the support plate 911 and the gear of the baffle 913, the discharged workpiece 14 that falls later discharges the workpiece 14 that fell earlier, so as to discharge the qualified workpieces 14 towards the high-quality product warehouse 102, and through the setting of the inclined surface of the baffle 913, the defective workpieces 14 are discharged from the through hole 914 to the defective product warehouse 101.

[0063] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments 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 precision cutting device for machining a track link, used for shearing a bar (13) into a workpiece (14), comprising a clamping table (1), a feeding motor (2), a feeding gear (3), a feeding rack (4), a moving knife (5), a fixed knife (6) and a clamping block (7), characterized in that: The invention also comprises a limit module (8), a guide module (9) and a storage box (10), wherein the limit module (8) comprises a sensing plate (81), wherein the sensing plate (81) is located at the front side of the fixed knife (6), the guide module (9) comprises a discharge box (91) and a discharge motor (92), wherein the discharge box (91) is located below the fixed knife (6), the discharge motor (92) is installed on the right side of the discharge box (91), the storage box (10) is installed on the lower side of the discharge box (91), and the storage box (10) comprises a defective bin (101) and a fine bin (102); the sensing plate (81) limits the length of the bar (13) extending from the fixed knife (6) and senses the flatness of the end surface of the bar (13), and the discharge box (91) is driven by the discharge motor (92) to discharge workpieces (14) with poor flatness and qualified workpieces (14) into the defective bin (101) and the fine bin (102) respectively.

2. A precision cutting device for machining a track link according to claim 1, characterized in that: The limit module (8) further comprises a connecting sleeve (82), a concave portion (821) being provided at the rear end of the connecting sleeve (82), the rear end surface of the sensing plate (81) being flat, and a convex portion (811) being provided at the front end of the sensing plate (81), the convex portion (811) being connected to the concave portion (821), and the convex portion (811) and the concave portion (821) being both configured as spherical structures.

3. A precision cutting device for machining a track link according to claim 2, characterized in that: The limit module (8) also includes a sliding sleeve (83) and a buffer spring (84), wherein the sliding sleeve (83) wraps around the front end of the connecting sleeve (82), the buffer spring (84) is installed between the sliding sleeve (83) and the connecting sleeve (82), and a retaining ring (822) is provided on the outer ring of the connecting sleeve (82).

4. A precision cutting device for machining track links according to claim 3, characterized in that: The sensing plate (81) further comprises a balance bar (812), wherein the balance bar (812) is connected to the front side of the convex portion (811), and a reflective sheet (813) is installed on the front end surface of the balance bar (812), and a probe (831) is installed inside the sliding sleeve (83).

5. A precision cutting device for machining track links according to claim 4, characterized in that: The limiting module (8) further comprises a top plate (85), a stopper (86) and a yield spring (87); the top plate (85) is slidably connected to the fixed knife (6); the sliding sleeve (83) is slidably connected to the top plate (85); a resistance cavity (832) is provided inside the sliding sleeve (83); the resistance cavity (832) is located at the rear side of the probe (831); the two stoppers (86) are respectively mounted on the left and right sides of the resistance cavity (832); the yield spring (87) is The spring (87) is installed between the stopper (86) and the sliding sleeve (83); the front end of the balance rod (812) is in a truncated cone structure; the adjacent surfaces of the two stoppers (86) are inclined surfaces; a push rod (861) is connected above the stopper (86); a step plate (851) is connected below the top plate (85); and the step plate (851) is located between the two push rods (861); and the width of the step plate (851) gradually increases from front to back.

6. A precision cutting device for machining track links according to claim 5, characterized in that: The rear end of the sliding sleeve (83) and the front end of the fixed knife (6) are respectively provided with a stop zone (11) and a trimming zone (12); the feeding motor (2) stops twice during one feeding process: the first stop of the feeding motor (2) occurs when the front end of the bar (13) enters the stop zone (11); the second stop of the feeding motor (2) occurs when the retaining ring (822) contacts the sliding sleeve (83) or when the front end of the bar (13) enters the trimming zone (12).

7. A precision cutting device for machining track segments according to claim 1, characterized in that: The discharge box (91) has two rotation directions: one discharge box (91) remains vertical and opens toward the fine product bin (102), and the other discharge box (91) deviates from the vertical direction and opens toward the defective product bin (101).

8. A precision cutting device for machining track links according to claim 7, characterized in that: The discharge box (91) comprises a support plate (911), a return spring (912) and a baffle (913); the support plate (911) comprises a long plate (9111) and a short plate (9112); the long plate (9111) is slidably connected to the right inner wall of the discharge box (91); the short plate (9112) is connected to the top of the long plate (9111); the return spring (912) is installed between the long plate (9111) and the discharge box (91); and the baffle (913) is installed between the long plate (9111) and the discharge box (91). The plate (913) is rotatably connected to the front and rear walls of the discharge box (91), and a gear structure is arranged on the right side of the baffle (913), a rack structure is arranged at the lower part of the long plate (9111), and the rack structure of the long plate (9111) is meshed with the gear structure of the baffle (913), a protrusion is arranged on the left inner wall of the discharge box (91), and the position height of the short plate (9112) in the natural state is located within the position height range of the protrusion of the discharge box (91).

9. A precision cutting device for machining track segments according to claim 8, characterized in that: The upper side surface of the baffle (913) is arranged as an inclined surface inclined in the front-to-back direction, and a through hole (914) is provided on the discharge box (91). The through hole (914) is located on the box wall of the discharge box (91) adjacent to the high end of the inclined surface of the baffle (913).

Images