A material pulling device for cold heading machine

Abstract

The present invention provides a material pulling device for a cold heading machine, comprising a material pulling drive and a material pulling mechanism, wherein the material pulling drive drives the material pulling mechanism to move forward and backward, the material pulling drive is arranged below the material pulling mechanism, the material pulling mechanism is installed on the inner side of the machine tool of the cold heading machine for picking up products, the material pulling drive is installed on the outer side of the machine tool and is movably connected to the machine tool, and the material pulling mechanism is slidably connected to the machine tool. Compared with the prior art, the material pulling device for a cold heading machine provided by the present invention has a simple structure, utilizes the transmission system on the cold heading machine to drive and connect with the material pulling drive on the present invention, clamps the material pulling opening on the material pulling plate at the screw position of the bolt, and when the ejection mechanism is reset, it can pull the bolt to completely demold the bolt from the mold, ensure that the tail hole is completely separated from the mold for unloading, ensure the normal processing and production efficiency of the cold heading machine equipment, and is suitable for promotion and application in this field, and has a very broad market prospect.

Description

Technical Field

[0001] The invention relates to the technical field of cold heading machine equipment, in particular to a material pulling device for a cold heading machine. Background Art

[0002] Bolts are commonly used fasteners, which are widely used in many fields because of their advantages such as self-locking, simple manufacturing, mass production, low cost, and interchangeability. In some fields, bolts with tail holes are required. The so-called tail hole is a hole opened on the inner side of the bolt away from the end of the nut. In the processing using the existing tail hole automatic cold heading machine, the punch is installed on the ejection mechanism and in the forming mold, and the return spring in the forming mold and the ejection mechanism is used to push the stamped bolt outward. However, the bolt is only pushed outward by the return spring of the forming mold and the ejection mechanism. Since the bolt has a tail hole, it is easy for the bolt to not be completely separated from the forming mold when the tail hole and the punch are removed, resulting in the product remaining in the forming mold, affecting the normal operation and processing efficiency of the equipment. Summary of the invention

[0003] The object of the present invention is to provide a material pulling device for a cold heading machine to solve the technical problems in the background technology.

[0004] To achieve the aforementioned purpose, the present invention provides the following technical solutions:

[0005] A material pulling device for a cold heading machine comprises a material pulling drive and a material pulling mechanism, wherein the material pulling drive drives the material pulling mechanism to move forward and backward, the material pulling drive is arranged below the material pulling mechanism, the material pulling mechanism is installed on the inner side of the machine tool of the cold heading machine for taking products, the material pulling drive is installed on the outer side of the machine tool and is movably connected to the machine tool, and the material pulling mechanism is slidably connected to the machine tool.

[0006] The material pulling mechanism includes a fixed plate, a material pulling plate adjustably connected to one side of the fixed plate and at least one group of pull rod assemblies. The pull rod assembly is fixed to the other side of the fixed plate and passes through the machine tool. The pull rod assembly is elastically slidably connected to the machine tool. The material pulling drive drives the pull rod assembly to move forward and backward.

[0007] The pulling plate is an L-shaped structure, comprising a first pulling plate and a second pulling plate, wherein the first pulling plate is vertically connected to one side of the second pulling plate, a pulling opening is provided on the other side of the first pulling plate, and the second pulling plate is adjustably connected to the fixed plate.

[0008] The pull rod assembly includes a pull rod and a compression spring sleeved on the pull rod, the front end of the pull rod is fixedly connected to a fixed plate, the rear end of the pull rod passes through the machine tool, the compression spring is arranged on the outside of the machine tool and abuts against the side wall of the machine tool, a limit block is installed on the rear end of the pull rod, and the compression spring is between the side wall of the machine tool and the limit block.

[0009] The material pulling drive component includes a driving shaft, a driving connecting rod and a push rod installed on the driving connecting rod. A cam is fixed on the driving shaft. The driving shaft is below the driving connecting rod. The driving connecting rod is rotatably connected to the machine tool. A driving wheel is fixed below the driving connecting rod to abut against the cam. The push rod is installed above the driving connecting rod, and the front end of the push rod abuts against the limit block on the pull rod.

[0010] The driving connecting rod is provided with a mounting through hole, and a rotating shaft is passed through the mounting through hole and is rotatably connected to the machine tool.

[0011] The second drawing plate is provided with a long adjustment hole, and the fixing plate is provided with a plurality of mounting holes corresponding to the positions of the long adjustment holes.

[0012] The material drawing opening is a U-shaped structure.

[0013] Compared with the prior art, the present invention provides a pulling device for a cold heading machine, which has a simple structure. It utilizes the transmission system on the cold heading machine to drive and connect with the pulling drive member on the present invention, and clamps the pulling opening on the pulling plate at the screw position of the bolt. When the ejection mechanism is reset, the bolt can be pulled to completely demold the bolt from the mold, ensuring that the tail hole is completely separated from the mold for unloading, thereby ensuring the normal processing and production efficiency of the cold heading machine equipment. It is suitable for promotion and application in this field, and its market prospect is very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : A schematic diagram of the three-dimensional structure of a material pulling device for a cold heading machine;

[0015] Figure 2 : Schematic diagram of the pulling plate structure;

[0016] Figure 3 : A schematic diagram of the installation effect of a material pulling device for a cold heading machine;

[0017] Figure 4 : Schematic diagram of the working principle of a material pulling device for a cold heading machine. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Specific embodiment 1: Please refer to Figure 1 and Figure 2In an embodiment of the present invention, a material pulling device for a cold heading machine includes a material pulling drive 1 and a material pulling mechanism 2. The material pulling drive 1 drives the material pulling mechanism 2 to move forward and backward. The material pulling drive 1 is arranged below the material pulling mechanism 2. The material pulling mechanism 2 is installed on the inner side of a machine tool 9 of the cold heading machine for taking products. The material pulling mechanism 2 is installed on the outer side of a forming mold 4. The material pulling drive 1 is installed on the outer side of the machine tool 9 and is movably connected to the machine tool 9. The material pulling mechanism 2 is slidably connected to the machine tool 9.

[0020] The material pulling mechanism 2 includes a fixed plate 201, a material pulling plate 202 adjustably connected to one side of the fixed plate 201, and at least one group of tie rod assemblies 203. In this embodiment, two groups of tie rod assemblies 203 with the same structure are used. The two groups of tie rod assemblies 203 are arranged in parallel. The tie rod assemblies 203 are fixed to the other side of the fixed plate 201 and pass through the machine tool 9. The tie rod assemblies 203 are elastically slidably connected to the machine tool 9, and the material pulling drive 1 drives the tie rod assemblies 203 to move forward and backward. By setting two groups of tie rod assemblies 203, the stability of the movement of the material pulling plate 202 is ensured.

[0021] The pulling plate 202 is an L-shaped structure, and the pulling plate 202 includes a first pulling plate 202-1 and a second pulling plate 202-2. The first pulling plate 202-1 is vertically connected to one side of the second pulling plate 202-2, and the other side of the first pulling plate 202-1 is provided with a pulling opening 202-1-1, and the pulling opening 202-1-1 is a U-shaped structure. The second pulling plate 202-2 is adjustably connected to the fixed plate 201, and the second pulling plate 202-2 is provided with a long adjustment hole 202-2-1. The fixed plate 201 is provided with several mounting holes 201-1 corresponding to the position of the long adjustment hole 202-2-1. The second pulling plate 202-2 is fixedly connected to the fixed plate 201 by screws, and the position of the pulling plate 202 on the fixed plate 201 is set according to the size of the product. It has strong versatility and high flexibility.

[0022] The pull rod assembly 203 includes a pull rod 203-1 and a compression spring 203-2 mounted on the pull rod 203-1. The front end of the pull rod 203-1 is fixedly connected to the fixed plate 201, and the rear end of the pull rod 203-1 passes through the machine tool 9. The compression spring 203-2 is arranged on the outside of the machine tool 9 and abuts against the side wall of the machine tool 9. A limit block 203-3 is installed at the rear end of the pull rod 203-1. The compression spring 203-2 is between the side wall of the machine tool 9 and the limit block 203-3. The pull rods 203-1 on the two groups of pull rod assemblies 203 are connected together through the limit block 203-3 for synchronous movement.

[0023] The material drawing drive member 1 includes a driving shaft 101, a driving connecting rod 103 and a push rod 104 installed on the driving connecting rod 103. A cam 102 is fixed on the driving shaft 101. The driving shaft 101 is below the driving connecting rod 103. A driving gear 3 is installed on one side of the driving shaft 101 to mesh with the transmission system 8 on the cold heading machine. The driving shaft 101 is driven to rotate by the transmission system 8 on the cold heading machine. The driving connecting rod 103 is rotatably connected to the machine tool 9. A mounting through hole 103-1 is provided on the driving connecting rod 103. A rotating shaft 7 is passed through the mounting through hole 103-1 to be rotatably connected to the machine tool 9. A driving wheel 103-2 is fixed below the driving connecting rod 103 to abut against the cam 102. The push rod 104 is installed above the driving connecting rod 103. The front end of the push rod 104 abuts against the limit block 203-3 on the pull rod 203-1. The rotational movement of the drive shaft 101 drives the cam 102 to rotate. Since the drive wheel 103-2 on the drive link 103 abuts against the cam 102, the rotation of the cam 102 drives the drive link 103 to move back and forth, so that the push rod 104 pushes the limit block 203-3 to move the pulling plate 202 toward the molding mold 4. When the drive wheel 103-2 contacts the lowest point on the cam 102, the push rod 104 disengages from the limit block 203-3, and the pull rod 203-1 is reset by the compression spring 203-2, and then the pulling plate 202 is reset.

[0024] How it works: See Figure 3 and Figure 4 The material pulling device of the present invention is installed on the machine tool 9 of the cold heading machine, and is driven and connected with the driving shaft 101 on the material pulling device through the transmission system 8 on the cold heading machine. The material pulling plate 202 is on one side of the forming mold 4, and a material pushing device 6 is installed on the right side of the forming mold 4. When the tail hole of the bolt is processed, there is a first reset spring 401 in the forming mold 4 to push the bolt outward for the first time, and the head of the bolt protrudes from the forming mold 4. The material pulling plate 202 is driven by the material pulling driving member 1 to move toward the bolt direction, and the material pulling opening 202-1-1 on the material pulling plate 202 is stuck on the screw rod of the bolt. At the same time, the material pushing device 6 is reset, driving the punch 5 installed on the material pushing device 6 to reset at the same time. Since the material pulling plate 202 clamps the bolt on the outside of the forming mold 4, when the punch 5 is reset, the tail hole of the bolt is separated from the punch 5, completing the demoulding of the bolt, and the bolt falls into the unloading trough 10 set in the machine tool 9 for collection, and the material pulling plate 202 is reset, and the operation is repeated.

[0025] Compared with the prior art, the present invention provides a pulling device for a cold heading machine, which has a simple structure. It utilizes the transmission system on the cold heading machine to drive and connect with the pulling drive member on the present invention, and clamps the pulling opening on the pulling plate at the screw position of the bolt. When the ejection mechanism is reset, the bolt can be pulled to completely demold the bolt from the mold, ensuring that the tail hole is completely separated from the mold for unloading, thereby ensuring the normal processing and production efficiency of the cold heading machine equipment. It is suitable for promotion and application in this field, and its market prospect is very broad.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A material pulling device for a cold heading machine, characterized in that: It includes a material pulling drive and a material pulling mechanism, the material pulling drive drives the material pulling mechanism to move forward and backward, the material pulling drive is arranged below the material pulling mechanism, the material pulling mechanism is installed on the inner side of the machine tool of the cold heading machine for picking up products, the material pulling drive is installed on the outer side of the machine tool and is movably connected to the machine tool, and the material pulling mechanism is slidably connected to the machine tool; the material pulling mechanism includes a fixed plate, a material pulling plate adjustably connected to one side of the fixed plate and at least one group of pull rod assemblies, the pull rod assembly is fixed on the other side of the fixed plate and passes through the machine tool, the pull rod assembly is elastically slidably connected to the machine tool, and the material pulling drive drives the pull rod assembly to move forward and backward; the material pulling plate is an L-shaped structure, and the material pulling plate includes a first A material pulling plate and a second material pulling plate, the first material pulling plate is vertically connected to one side of the second material pulling plate, a material pulling opening is provided on the other side of the first material pulling plate, the second material pulling plate is adjustably connected to the fixed plate, a long adjustment hole is provided on the second material pulling plate, and a plurality of mounting holes are provided on the fixed plate corresponding to the position of the long adjustment hole; the material pulling opening is a U-shaped structure; the pull rod assembly includes a pull rod and a compression spring sleeved on the pull rod, the front end of the pull rod is fixedly connected to the fixed plate, the rear end of the pull rod passes through the machine tool, the compression spring is arranged on the outside of the machine tool and abuts against the side wall of the machine tool, a limit block is installed at the rear end of the pull rod, and the compression spring is between the side wall of the machine tool and the limit block; The material pulling driving member includes a driving shaft, a driving connecting rod and a push rod installed on the driving connecting rod. A cam is fixed on the driving shaft. The driving shaft is below the driving connecting rod. The driving connecting rod is rotatably connected to the machine tool. A driving wheel is fixed below the driving connecting rod to abut against the cam. The push rod is installed above the driving connecting rod. The front end of the push rod abuts against the limit block on the pull rod. The pulling device is installed on the machine tool of the cold heading machine, and is driven and connected to the driving shaft on the pulling device through the transmission system on the cold heading machine. The pulling plate is on one side of the forming mold, and a pushing device is installed on the right side of the forming mold. When the tail hole of the bolt is processed, there is a first reset spring in the forming mold to push the bolt outward for the first time, and the head of the bolt protrudes out of the forming mold. The pulling plate moves toward the bolt through the drive of the pulling drive member, and the pulling opening on the pulling plate is stuck on the screw rod of the bolt. At the same time, the pushing device is reset, and the punch installed on the pushing device is reset at the same time. Since the pulling plate sticks the bolt to the outside of the forming mold, when the punch is reset, the tail hole of the bolt is separated from the punch, completing the demoulding of the bolt, and the bolt falls into the unloading trough set in the machine tool for collection, and the pulling plate is reset.

2. A material pulling device for a cold heading machine according to claim 1, characterized in that: A mounting through hole is arranged on the driving connecting rod, and a rotating shaft is passed through the mounting through hole and is rotatably connected with the machine tool.

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