Automatic wire drawing machine for fastener production

Abstract

The present application relates to wire tensioning technology in the field of wire drawing equipment, and particularly relates to an automatic wire drawing machine for fastener production, which comprises a wire drawing die and further comprises: a pump core, one end of the circular tubular body of the pump core is provided with a flange one, and a ring-shaped pressure sensor is connected between the flange one and the outlet end of the wire drawing die. The automatic wire drawing machine for fastener production provides a wire tension control function for wire drawing processing, wherein, unlike the tension wheel or tension roller in the existing wire buffer mechanism, the present application passes the wire through the wire passing cylinder in the form of a spiral, controls the wire pitch of the wire on the wire passing cylinder to achieve wire tension control, and further uses the adjustable hydraulic transmission structure to take the tension of the wire drawing die and the tension of the wire as the trigger condition for adjusting the control tension of the wire passing cylinder, so that self-adaptive tension control is achieved, and the equipment has fast response speed, small space occupation, simple structure and is easy to use and maintain.

Description

Technical Field

[0001] This invention relates to the field of wire tensioning technology for wire drawing equipment, and in particular to an automated wire drawing machine for fastener production. Background Technology

[0002] A wire drawing machine is a device that forces wire through a small-hole mold to reduce its diameter or change its cross-sectional shape. When pulling the wire through the mold, the tension control of the wire is very important. Simply put, the faster the wire is drawn, the greater the pulling force, and the higher the tension on the wire. Excessive tension can easily break the wire. Therefore, the tension of the wire has a direct impact on the drawing quality and drawing speed.

[0003] There are many reasons for fluctuations in wire drawing tension, such as changes in the diameter of the wire raw material, changes in the hardness of the wire, and changes in lubrication conditions.

[0004] Tension control during wire drawing is generally achieved by controlling the rotational speed of the winding mechanism. The faster the winding speed, the higher the tension generated in the wire, and vice versa. However, when adjusting tension by controlling the winding speed, there is often a certain lag due to the rotational inertia of the winding machine. Therefore, the performance requirements of the motor are relatively high. Alternatively, a tension wheel can be used for buffering. However, the tension wheel is limited by its diameter and equipment size, and the curvature of the wire passing through the tension wheel is often relatively large. The wire is easily damaged when subjected to high curvature bending.

[0005] To address the technical challenges of wire tension control during the wire drawing process, an automated wire drawing machine for fastener production is proposed. Summary of the Invention

[0006] In view of the problems of sluggish wire tension control and large curvature of wire during tension buffering in the above-mentioned or existing technologies, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide an automated wire drawing machine for fastener production.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automated wire drawing machine for fastener production, comprising a wire drawing die, and further comprising: a pump core, one end of which is provided with a flange one, a ring-shaped pressure sensor connected between flange one and the outlet end of the wire drawing die, the other end of the pump core being threaded and connected with a nut, a flange two being provided between the pump core and the thread and flange one; a pump housing, which is composed of two sections of rings of different diameters sealed together, the larger diameter section of the pump housing being sealed and slidably sleeved with flange two, the pump... The small-diameter section of the housing is sealed and slidably sleeved between the pump core and the second thread and flange, and the large-diameter port of the pump housing is in contact with the first flange with a compression spring; the main support is fixedly sleeved to the outer wall of the pump housing; the wire guide spool has one end slidably inserted into the main support, and the main support is provided with a fisheye bearing one on the outside of the wire guide spool, and the end of the wire guide spool away from the pump core is rotatably connected to a fisheye bearing two around its axis; the oil cylinder is connected to the annular cavity between the pump housing and the pump core through an oil pipe, and the piston rod of the oil cylinder is rotatably connected to the end of the wire guide spool away from the first fisheye bearing.

[0009] As a preferred embodiment of the automatic wire drawing machine for fastener production of the present invention, the main support sidewall is welded with a secondary support one and a secondary support two, and a linear bearing is fixedly sleeved at the end of the secondary support one, and the wire tube is inserted into the linear bearing.

[0010] As a preferred embodiment of the automated wire drawing machine for fastener production of the present invention, the wire drawing die, pressure sensor, compression spring, pump core and pump housing are coaxial, the secondary bracket is fixedly connected to the cylinder body of the oil cylinder at one end of the piston rod, the oil cylinder is coaxial with the wire guide drum, and the axis of the wire guide drum intersects with the axis of the wire drawing die.

[0011] As a preferred embodiment of the automated wire drawing machine for fastener production of the present invention, there are two fisheye bearings, one of which is fixedly connected to a secondary support, and the other is connected to a collar, which is rotatably sleeved with the end of the wire guide drum through a deep groove ball bearing.

[0012] In a preferred embodiment of the automated wire drawing machine for fastener production of the present invention, the outer wall of the wire guide drum is fitted with retaining rings on both sides of the deep groove ball bearing.

[0013] As a preferred embodiment of the automatic wire drawing machine for fastener production of the present invention, the oil cylinder has a single oil pipe interface, and the oil pipe interface is located at the end of the cylinder body near the wire guide drum.

[0014] As a preferred embodiment of the automatic wire drawing machine for fastener production of the present invention, the main support and the pump housing are connected by a flange, and the screw mounting holes between the main support and the pump housing are arranged in a ring array about the pump housing, and one of the screw mounting holes penetrates the pump housing and connects to the pump housing and the pump core. The oil cylinder and the pump housing are connected by an oil pipe through the screw hole and the oil pipe interface.

[0015] As a preferred embodiment of the automated wire drawing machine for fastener production of the present invention, the pump housing and pump core are provided with annular grooves corresponding to the position, diameter and wire diameter of the compression spring and are fitted together with the compression spring.

[0016] As a preferred embodiment of the automatic wire drawing machine for fastener production of the present invention, the outer peripheral wall of the pump core is provided with a sealing ring at the sliding joint where it is in contact with the inner wall of the pump housing, and the oil between the pump housing and the pump core, the oil cylinder and the oil pipe between them are filled with oil.

[0017] As a preferred embodiment of the automated wire drawing machine for fastener production of the present invention, the processed wire passes sequentially through the wire drawing die, pressure sensor, pump core, and fisheye bearing one, and then passes through the spool and exits from the fisheye bearing two.

[0018] The beneficial effects of the automated wire drawing machine for fastener production of the present invention are as follows: The automated wire drawing machine for fastener production of the present invention provides a wire tension control function for wire drawing processing. Unlike the tension wheel or tension roller in the existing wire buffer mechanism, the present invention achieves wire tension control by controlling the winding pitch of the wire on the wire drum in a spiral manner through the wire drawing die. Furthermore, by using the adjustable hydraulic transmission structure, the tension of the wire drawing die and the tension of the wire are used as the trigger conditions for tension adjustment of the wire drum, thereby realizing adaptive tension control. Moreover, the equipment has a fast response speed, small footprint, simple structure, and is easy to use and maintain. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of an automated wire drawing machine for fastener production.

[0021] Figure 2 for Figure 1 A structural sectional view.

[0022] Figure 3 for Figure 1 A breakdown diagram of the drive structure for tension adjustment.

[0023] Figure 4 for Figure 1 Breakdown of the execution structure for tension adjustment.

[0024] In the diagram: 100, wire drawing die; 101, pressure sensor; 102, pump core; 1021, flange one; 1022, flange two; 1023, thread; 1024, sealing ring; 103, pump housing; 104, compression spring; 105, main support; 1051, secondary support one; 1052, secondary support two; 106, wire guide spool; 107, linear bearing; 108, collar; 109, fisheye bearing one; 110, fisheye bearing two; 111, hydraulic cylinder. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Example, refer to Figures 1-4 This embodiment provides an automated wire drawing machine for fastener production, which can realize real-time control of wire tension during wire drawing processing, and can achieve adaptive tension control, high tension adjustment response speed and small equipment structure volume.

[0027] refer to Figure 2 and Figure 3 The present invention includes a wire drawing die 100 and a pump core 102. One end of the pump core 102 has a flange 1021, and a ring-shaped pressure sensor 101 is connected between the flange 1021 and the outlet end of the wire drawing die 100. The other end of the pump core 102 has a thread 1023 and is connected to a nut. A flange 1022 is located between the thread 1023 and the flange 1021. A pump housing 103 is composed of two circular rings of different diameters sealed together. The larger diameter section of the pump housing 103 is slidably and sealingly fitted with the flange 1022, and the smaller diameter section of the pump housing 103 is slidably and sealingly fitted between the pump core 102 and the flange 1022. A compression spring 104 abuts against the larger diameter port of the pump housing 103 and the flange 1021. (Reference) Figure 1 and Figure 3 The main support 105 is fixedly sleeved to the outer wall of the pump housing 103. One end of the wire guide 106 is slidably inserted into the main support 105. A fisheye bearing 109 is provided on the outside of the wire guide 106 on the main support 105. A fisheye bearing 110 is rotatably connected to the end of the wire guide 106 away from the pump core 102 around its axis. (Reference) Figure 1 The oil cylinder 111 is connected to the annular cavity between the pump housing 103 and the pump core 102 through an oil pipe, and the piston rod of the oil cylinder 111 is rotatably connected to the end of the wire guide 106 away from the fisheye bearing 109.

[0028] This invention mainly provides a wire tension control function for wire drawing processing. The realization of this function mainly relies on two parts of the structure. One is a drive structure connected to the wire drawing die 100, which is responsible for sensing the change in wire tension on the wire drawing die 100 (before the wire drawing die 100 exits) and transmitting the change in tension to the other part of the execution structure. The execution structure adjusts the wire tension (after the wire drawing die 100 exits) according to the feedback.

[0029] In this device, the main support 105 is rigidly connected to the main frame of the device and is relatively stationary. The path of the wire is as follows: the raw wire enters through the inlet of the wire drawing die 100, passes through the wire drawing die 100, pressure sensor 101, pump core 102, and fisheye bearing 109 in sequence, and then passes through the wire spool 106 and exits through the fisheye bearing 110.

[0030] The specific working principle should first be explained by the fact that this invention designs a structure that is completely different from existing wire tension buffer mechanisms. Unlike the tension wheel or tension roller in existing wire buffer mechanisms, this invention winds the wire through the spool 106 in a spiral manner, and it has the following characteristics: Firstly, the curvature of the wire on the guide drum 106 depends on the pitch of the wire spiral. The larger the pitch, the smaller the curvature of the wire passing through the guide drum 106. By controlling the pitch of the wire spiral within a suitable range, the wire can be protected from damage when passing through the tensioning station. The key points are the guide drum 106 and the tension wheel of the same diameter. The curvature of the wire spiral passing through the guide drum 106 is much lower than that passing through the tension wheel. It is important to distinguish this from tension rollers. Existing tension rollers are not fundamentally different from tension wheels in terms of application effect. They do not have the effect of significantly reducing the curvature of the wire when passing through the wire. The way the wire passes through the wire passer 106 in this invention is also completely different from that of tension rollers. For the specific way the wire passes through the wire, please refer to "Part Two" below. Secondly, as discussed in "Part One," when the number of spiral turns of the wire wound around the spool 106 is fixed, the larger the spiral pitch of the spool 106, the longer the length of the wire wound around the spool 106; conversely, the smaller the spiral pitch, the shorter the length of the portion of the wire wound around the spool 106. Based on these characteristics, the tension of the wire can be controlled simply by controlling the length of the portion of the wire wound around the spool 106. (Refer to...) Figure 1In the diagram, the number of spiral turns of the wire wound around the spool 106 is fixed, and the spiral pitch and winding length of the wire and spool 106 are relatively fixed (mainly determined by the length of the spool 106 between the first fish-eye bearing 109 and the second fish-eye bearing 110). Therefore, when the hydraulic cylinder 111 pulls the spool 106 towards the hydraulic cylinder 111, the length of the spool 106 between the first fish-eye bearing 109 and the second fish-eye bearing 110 is shortened, which reduces the spiral pitch of the wire and thus reduces the length of the wire wound around the spool 106, ultimately achieving the purpose of relaxing the wire tension. Conversely, it will increase the wire tension. It is important to note here that Figure 1 The angle between the axis of the wire guide 106 and the wire passing through the pump core 102 shown is not unique. This angle affects the smoothness of the wire entering the wire guide 106 from the fisheye bearing 109. It is determined according to the specific process of the material and equipment. In addition, when processing non-wear-resistant wires, the fisheye bearing can be replaced by a pulley, and lubrication measures can be added. However, none of the above measures exceed or change the functional structure design of the present invention. Thirdly, in this invention, only one wire guide spool 106 is needed to achieve tension adjustment of the wire. Compared with traditional tensioning equipment that requires multiple tensioning rollers or tensioning rollers to wind the wire, the tensioning method of this invention obviously reduces the size of the equipment, simplifies the equipment structure, and brings more implicit long-term benefits in maintenance and use.

[0031] Based on the above principle, it can be seen that the tension adjustment lies in the drive structure of the hydraulic cylinder 111, which has the following characteristics: Firstly, with Figure 2 Taking the perspective as an example, the wire is drawn from right to left and generates tension on the wire drawing die 100 relative to the main support 105. The wire drawing die 100 transmits the tension to the pump core 102 through the pressure sensor 101, which drives the pump core 102 to move into the pump housing 103 fixed relative to the main support 105, thereby squeezing out the oil between the pump housing 103 and the pump core 102. The oil enters the oil cylinder 111 through the oil pipe, pushing the piston rod of the oil cylinder 111 to its tail end, thereby controlling the tension of the wire to decrease, so as to avoid the wire from breaking or being damaged due to excessive tension. Secondly, by adjusting the ratio of the effective working area of ​​flange 1022 in hydraulic action to the effective working area of ​​piston rod of cylinder 111, the movement amplitude of piston rod of cylinder 111 can be controlled, thereby controlling the magnitude of wire tension adjustment. This results in different tension adjustment effects brought about by large-range coarse control or small-range precise control of wire tension. Third, the compression spring 104 provides a thrust for the reset of various components when the wire tension decreases. The preload of the compression spring 104 can be controlled by adjusting the nut. The purpose is to make the initial working length of the compression spring 104 close to the working length. In layman's terms, if the compression spring 104 is not preloaded, the tension on the wire drawing die 100 after the drawing process starts will cause the length of the compression spring 104 to decrease significantly. This will cause a chain reaction in the pump core 102, the piston rod of the oil cylinder 111 and the wire guide spool 106, which will have a serious adverse effect on the start of the process. If a wire with high pulling strength is required, tighten the nut appropriately so that the preload of the compression spring 104 is close to or equal to the pulling force required. Conversely, loosen the nut and use double nuts to tighten after adjustment to prevent loosening. The specific preload value of the compression spring 104 can be read in real time by the pressure sensor 101.

[0032] This invention also relates to the following technical details: Firstly, the wire guide spool 106 rotates during operation as the wire is drawn; its rotating support structure is as follows (see reference). Figure 4 The main support 105 has auxiliary support 1051 and auxiliary support 2 1052 welded to its side wall. A linear bearing 107 is fixedly sleeved at the end of auxiliary support 1051. The wire guide 106 is inserted into the linear bearing 107. The wire drawing die 100, pressure sensor 101, compression spring 104, pump core 102 and pump housing 103 are coaxial. The auxiliary support 2 1052 is fixedly connected to the cylinder body of the oil cylinder 111 at one end of the piston rod. The oil cylinder 111 is coaxial with the wire guide 106. The axis of the wire guide 106 intersects with the axis of the wire drawing die 100. There are two fisheye bearings. One of them is fixedly connected to auxiliary support 1051. The other is connected to a collar 108. The collar 108 is rotatably sleeved with the end of the wire guide 106 through a deep groove ball bearing. The outer wall of the wire guide 106 is clamped with a retaining ring on both sides of the deep groove ball bearing. Secondly, refer to Figure 1 and Figure 2 The hydraulic cylinder 111 has a single oil pipe interface, and the oil pipe interface is located at one end of the cylinder body of the hydraulic cylinder 111 near the wire guide 106. The main support 105 is connected to the pump housing 103 by a flange, and the screw mounting holes between the main support 105 and the pump housing 103 are arranged in a ring array about the pump housing 103. One of the screw mounting holes penetrates the pump housing 103 and connects to the pump housing 103 and the pump core 102. The hydraulic cylinder 111 and the pump housing 103 are connected by an oil pipe through the screw hole and the oil pipe interface. Third, the pump housing 103 and pump core 102 are provided with annular grooves corresponding to the position, diameter and wire diameter of the compression spring 104 to match and fit with the compression spring 104, thereby increasing the working stability of the compression spring 104. Fourth, the outer peripheral wall of the pump core 102 is provided with a sealing ring 1024 at the sliding joint where it is in contact with the inner wall of the pump housing 103, and the oil pipe between the pump housing 103 and the pump core 102, the oil cylinder 111 and the oil pipe between them are filled with oil.

[0033] In summary, the present invention provides a wire tension control function for wire drawing processing in an automated wire drawing machine for fastener production. Unlike the tension wheel or tension roller in existing wire buffer mechanisms, the present invention achieves wire tension control by controlling the winding pitch of the wire on the wire guide drum 106 in a spiral manner. Furthermore, by using an adjustable hydraulic transmission structure, the tension on the wire drawing die 100 and the tension on the wire are used as trigger conditions for tension adjustment of the wire guide drum 106, thereby achieving adaptive tension control. The equipment has a fast response speed, small footprint, simple structure, and is easy to use and maintain.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automated wire drawing machine for fastener production, comprising a wire drawing die (100), characterized in that, Also includes: The pump core (102) has a flange (1021) at one end of its cylindrical body. A ring-shaped pressure sensor (101) is connected between the flange (1021) and the outlet end of the wire drawing die (100). The other end of the pump core (102) is threaded (1023) and connected with a nut. A flange (1022) is provided between the thread (1023) and the flange (1021) of the pump core (102). The pump casing (103) is composed of two circular rings of different diameters that are sealed and connected. The large diameter section of the pump casing (103) is sealed and slidably connected to the second flange (1022). The small diameter section of the pump casing (103) is sealed and slidably connected to the pump core (102) between the thread (1023) and the second flange (1022). A compression spring (104) is in contact between the large diameter port of the pump casing (103) and the first flange (1021). The main support (105) is fixedly sleeved to the outer wall of the pump casing (103); The wire guide tube (106) has one end slidably inserted into the main support (105). The main support (105) is provided with a fish-eye bearing (109) on the outside of the wire guide tube (106). The end of the wire guide tube (106) away from the pump core (102) is rotatably connected to a fish-eye bearing (110) around its axis. The cylinder (111) is connected to the annular cavity between the pump housing (103) and the pump core (102) via an oil pipe, and the piston rod of the cylinder (111) is rotatably connected to the end of the wire guide (106) away from the fisheye bearing (109).

2. The automated wire drawing machine for fastener production as described in claim 1, characterized in that: The main support (105) has a secondary support one (1051) and a secondary support two (1052) welded to its side wall. The end of the secondary support one (1051) is fixedly sleeved with a linear bearing (107), and the wire tube (106) is inserted into the linear bearing (107).

3. The automated wire drawing machine for fastener production as described in claim 2, characterized in that: The wire drawing die (100), pressure sensor (101), compression spring (104), pump core (102) and pump housing (103) are coaxial. The secondary support (1052) is fixedly connected to the cylinder body of the oil cylinder (111) at one end of the piston rod. The oil cylinder (111) is coaxial with the wire guide spool (106), and the axis of the wire guide spool (106) intersects with the axis of the wire drawing die (100).

4. The automated wire drawing machine for fastener production as described in claim 3, characterized in that: Two fisheye bearings, one of which is fixedly connected to the sub-support 1 (1051), and the other is connected to a collar (108), which is rotatably sleeved with the end of the wire guide (106) through a deep groove ball bearing.

5. The automated wire drawing machine for fastener production as described in claim 4, characterized in that: The outer wall of the spool (106) is fitted with snap rings on both sides of the deep groove ball bearing.

6. The automated wire drawing machine for fastener production as described in claim 1, characterized in that: The hydraulic cylinder (111) has a single oil pipe interface, and the oil pipe interface is located at the end of the cylinder body of the hydraulic cylinder (111) near the wire spool (106).

7. The automated wire drawing machine for fastener production as described in claim 6, characterized in that: The main support (105) is flanged to the pump housing (103), and the screw mounting holes between the main support (105) and the pump housing (103) are arranged in a ring array about the pump housing (103). One of the screw mounting holes passes through the pump housing (103) and connects to the pump housing (103) and the pump core (102). The oil cylinder (111) and the pump housing (103) are connected by an oil pipe through the screw hole and the oil pipe interface.

8. The automated wire drawing machine for fastener production as described in claim 1, characterized in that: The pump housing (103) and pump core (102) are provided with annular grooves corresponding to the position, diameter and wire diameter of the compression spring (104) to match and fit with the compression spring (104).

9. The automated wire drawing machine for fastener production as described in claim 1, characterized in that: The outer peripheral wall of the pump core (102) is provided with a sealing ring (1024) at the sliding joint where it is in contact with the inner wall of the pump housing (103), and the oil between the pump housing (103) and the pump core (102), the oil cylinder (111) and the oil pipe between them are filled with oil.

10. The automated wire drawing machine for fastener production as described in claim 1, characterized in that: The processed wire passes through the wire drawing die (100), pressure sensor (101), pump core (102), and fisheye bearing one (109) in sequence, and then passes through the wire spool (106) and exits through fisheye bearing two (110).

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