A cold heading device of a bolt forming machine

Abstract

The present disclosure relates to the technical field of bolt processing, and one embodiment of the present disclosure provides a cold heading device of a bolt forming machine, which comprises a base and a feeding rack, the feeding rack is vertically fixed on the surface of the base, a feeding cutting assembly is arranged on the top of the base, a conveying belt is installed on the surface of the base, a forming cold heading assembly is arranged on the conveying belt and the base, the forming cold heading assembly comprises a plurality of feeding grooves, the feeding grooves are evenly arranged on the surface of the conveying belt, the bottom opening part of the feeding rack is located on one side of the conveying belt, a rectangular opening is arranged on the side surface of the feeding rack, the surface of the base is connected with a limiting push block through a linear drive, and the limiting push block passes through the rectangular opening and is located in the feeding rack. Through the above technical scheme, the technical problem that the discharging process is often not smooth after the cold heading device in the prior art completes bolt forming is solved. Most devices adopt simple gravity feeding or manual auxiliary discharging mode, and the former is prone to the technical problem that the bolts are stuck in the discharging port.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of bolt processing, and more specifically, to a cold heading device for a bolt forming machine. Background Technology

[0002] In bolt manufacturing, cold heading has become a key technology for bolt forming due to its advantages of high efficiency, energy saving, and high material utilization. The cold heading device is the core equipment for realizing this process. It applies pressure to the metal blank through a mold, causing it to plastically deform at room temperature and quickly form it into the required bolt shape.

[0003] However, traditional cold heading devices for bolt forming machines have significant drawbacks. Existing cold heading devices often experience difficulties in the unloading process after bolt forming. Most devices employ simple gravity feeding or manual assistance for unloading. The former is prone to bolts getting stuck at the discharge port, especially when the bolt shape is complex or requires high dimensional accuracy; the latter relies on frequent manual operation, which not only consumes a lot of manpower but is also prone to human error. This inconvenient unloading situation greatly impacts production efficiency. Frequent jamming requires machine shutdown for cleaning, disrupting the production rhythm and extending the production cycle of individual bolts.

[0004] There is an urgent need to design a cold heading device for bolt forming machines that facilitates material discharge, in order to improve work efficiency and reduce production costs. Utility Model Content

[0005] To overcome the above-mentioned defects, embodiments of this disclosure provide a cold heading device for a bolt forming machine, which solves the problem that the discharge process of existing cold heading devices is often not smooth enough after bolt forming. Most devices use simple gravity feeding or manual assisted discharge methods, the former of which is prone to the technical problem of bolts getting stuck at the discharge port.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a cold heading apparatus for a bolt forming machine, comprising:

[0007] A base and a feeding rack, wherein the feeding rack is vertically fixed to the surface of the base;

[0008] A feed cutting assembly is disposed on the top of the base;

[0009] A conveyor belt and a forming cold heading assembly, wherein the conveyor belt is mounted on the surface of the base, and the forming cold heading assembly is disposed on the conveyor belt and the base;

[0010] The forming cold heading assembly includes several feeding troughs, which are evenly opened on the surface of the conveyor belt. The bottom side of the feeding frame has an open structure, and the bottom opening of the feeding frame is located on one side of the conveyor belt. A rectangular opening is opened on the side surface of the feeding frame. The base surface is connected to a limit push block through a linear drive, and the limit push block passes through the rectangular opening and is located in the feeding frame.

[0011] As a further technical solution, a top plate is provided on one side of the feeding rack, the top plate is located on the top of the conveyor belt, and a pair of rectangular plates are provided on the surface of the base, each of which is connected to a forming frame by a vertical linear drive.

[0012] As a further technical solution, the surface of the forming frame is provided with a number of forming grooves, the forming grooves are corresponding to the material feeding grooves, and a pair of stabilizing blocks are provided at both the upper and lower ends of the base surface, and the forming frame is slidably attached to the stabilizing blocks.

[0013] As a further technical solution, a fixing frame is provided on the surface of the base, a telescopic hydraulic cylinder is installed on the fixing frame, a pressure seat is provided at the output end of the telescopic hydraulic cylinder, and a plurality of forming heads are provided on the surface of the pressure seat.

[0014] As a further technical solution, the feeding and cutting assembly includes a stand, which is fixed to the top of the base. A cutting hydraulic cylinder is installed on the stand, and a cutting blade holder is provided at the output end of the cutting hydraulic cylinder. A notch is opened at the top of the feeding frame, which is located directly below the cutting blade holder. A feeding port is opened on the surface of the base.

[0015] As a further technical solution, the top of the limiting push block is an inclined structural surface, the side surface of the limiting push block is an arc structural surface, and the curvature of the side surface of the limiting push block matches the curvature of the conveyor belt surface.

[0016] As a further technical solution, a material sliding frame is provided on the side surface of the base, and the material sliding frame is located at the bottom of the conveyor belt.

[0017] As a further technical solution, the protrusion height of the forming head end face increases from low to high.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] In this disclosure, the forming cold heading assembly solves the problem of poor material discharge in traditional cold heading devices through the coordinated action of the feeding chute, forming frame, and forming head. The feeding chute precisely positions the billet, the conveyor belt enables continuous conveying, the forming groove of the forming frame cooperates with the feeding chute to form a mold, and the telescopic hydraulic cylinder drives the forming head to apply gradient pressure, ensuring that the bolts are formed gradually and accurately. Stabilizing blocks ensure the stable movement of the forming frame and reduce deviations. After forming, the bolts are automatically moved to the sliding frame by the conveyor belt to avoid jamming, achieving smooth material discharge, improving production efficiency and forming quality, and adapting to the needs of mass production. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0022] Figure 2 This is an isometric drawing of the present disclosure;

[0023] Figure 3 This is an isometric sectional view of the present disclosure;

[0024] In the diagram: 1. Base; 2. Feed rack; 3. Conveyor belt; 4. Forming and cold heading assembly; 4-1. Feed chute; 4-2. Rectangular opening; 4-3. Limiting push block; 4-4. Top plate; 4-5. Rectangular plate; 4-6. Forming frame; 4-7. Forming groove; 4-8. Stabilizing strip; 4-9. Fixing frame; 4-10. Telescopic hydraulic cylinder; 4-11. Pressure seat; 4-12. Forming head; 5. Feeding and cutting assembly; 5-1. Vertical frame; 5-2. Cutting hydraulic cylinder; 5-3. Cutting knife holder; 5-4. Notch; 5-5. Feed port; 6. Sliding rack. Detailed Implementation

[0025] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0026] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0028] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-3 As shown, a cold heading apparatus for a bolt forming machine according to an embodiment of the present disclosure is illustrated, comprising:

[0032] The base 1 and the feed rack 2 are vertically fixed to the surface of the base 1;

[0033] Feeding and cutting assembly 5, wherein the feeding and cutting assembly 5 is disposed on the top of the base 1;

[0034] The conveyor belt 3 and the forming cold heading assembly 4 are provided, wherein the conveyor belt 3 is mounted on the surface of the base 1 and the forming cold heading assembly 4 is disposed on the conveyor belt 3 and the base 1;

[0035] The forming cold heading assembly 4 includes several feeding troughs 4-1, which are evenly distributed on the surface of the conveyor belt 3. The bottom side of the feeding frame 2 has an opening structure, located on one side of the conveyor belt 3. A rectangular opening 4-2 is formed on the side surface of the feeding frame 2. A limiting push block 4-3 is linearly driven to the surface of the base 1. The limiting push block 4-3 passes through the rectangular opening 4-2 and is located within the feeding frame 2. A top plate 4-4 is provided on one side of the feeding frame 2, located at the top of the conveyor belt 3. A pair of rectangular plates 4-5 are provided on the surface of the base 1. Forming frames 4-6 are vertically and linearly connected to the forming plates 4-5. The surface of the forming frame 4-6 is provided with several forming grooves 4-7, which correspond to the material feeding grooves 4-1. A pair of stabilizing blocks 4-8 are provided at both the upper and lower ends of the surface of the base 1. The forming frame 4-6 is slidably attached to the stabilizing blocks 4-8. A fixing frame 4-9 is provided on the surface of the base 1. A telescopic hydraulic cylinder 4-10 is installed on the fixing frame 4-9. A pressure seat 4-11 is provided at the output end of the telescopic hydraulic cylinder 4-10. Several forming heads 4-12 are provided on the surface of the pressure seat 4-11.

[0036] In some examples, a forming cold heading assembly 4 is designed to achieve stable forming and material feeding. This assembly includes multiple evenly spaced feed troughs 4-1 on the conveyor belt 3, providing positioning and conveying paths for the bolt blanks. The dimensions are adapted to the blanks to ensure that the blanks remain stable and do not shift during conveying. The bottom opening of the feed rack 2 is aligned with one side of the conveyor belt 3, allowing the cut bar stock to fall smoothly into the feed troughs 4-1. The rectangular opening 4-2 on the side surface cooperates with the limiting push block 4-3 on the base 1. The limiting push block 4-3 extends and retracts within the rectangular opening 4-2 via a linear drive device, which can precisely control the position of the bar stock within the feed rack 2, ensuring accurate feeding position each time.

[0037] The top plate 4-4 covers the top of the conveyor belt 3, limiting the blank in the feed chute 4-1 and preventing it from jumping out during conveying. A pair of rectangular plates 4-5 on the surface of the base 1 are connected to the forming frame 4-6 through a vertical linear drive device, which can control the up and down movement of the forming frame 4-6. The forming groove 4-7 on the surface of the forming frame 4-6 corresponds to the position of the feed chute 4-1. When the blank is conveyed to the forming station, the two forming frames 4-6 are raised and lowered to dock, and the forming groove 4-7 cooperates with the feed chute 4-1 to form a forming mold.

[0038] Stabilizing blocks 4-8 are fixed at both ends of the base 1 and slide against the forming frame 4-6, providing stable guidance for the lifting and lowering of the forming frame 4-6 and reducing swaying. A telescopic hydraulic cylinder 4-10 is installed on the fixed frame 4-9, with its output end connected to a pressure seat 4-11. The forming head 4-12 on the surface of the pressure seat 4-11 engages with the forming groove 4-7. The telescopic hydraulic cylinder 4-10 pushes the pressure seat 4-11 horizontally, and the forming head 4-12 penetrates into the forming groove 4-7, applying pressure to the blank to complete the final forming of the bolt. The formed bolt continues to move forward under the drive of the conveyor belt 3, achieving automatic unloading. The entire forming cold heading assembly 4, through the precise cooperation of its components, realizes continuous production of bolts from blank positioning and gradual forming to automatic unloading, effectively improving bolt forming efficiency and quality.

[0039] like Figures 1-3 As shown in the figure, the feeding and cutting assembly 5 in this embodiment includes a stand 5-1, which is fixed to the top of the base 1. A cutting hydraulic cylinder 5-2 is installed on the stand 5-1. A cutting blade holder 5-3 is provided at the output end of the cutting hydraulic cylinder 5-2. A notch 5-4 is opened at the top of the feeding frame 2, which is located directly below the cutting blade holder 5-3. A feeding port 5-5 is opened on the surface of the base 1.

[0040] In some examples, the bar stock cutting and feeding effect is achieved by designing a feeding and cutting assembly 5. This assembly includes a vertical frame 5-1 fixed to the top of the base 1, providing a stable mounting base for the cutting hydraulic cylinder 5-2. The cutting hydraulic cylinder 5-2 is fixed to the vertical frame 5-1 by bolts, and its output end is connected to the cutting blade holder 5-3, which can drive the cutting blade holder 5-3 to move vertically up and down. The notch 5-4 at the top of the feed frame 2 corresponds to the cutting blade holder 5-3, ensuring that the cutting blade holder 5-3 can accurately cut the bar stock when it descends.

[0041] The feed inlet 5-5 on the surface of the base 1 is connected to the external bar stock supply device. The bar stock enters the feed rack 2 through the feed inlet 5-5. After the bar stock enters the feed rack 2, the limiting push block 4-3 extends under the linear drive of the base 1 and pushes the bar stock to the designated position. At this time, the cutting hydraulic cylinder 5-2 is activated, driving the cutting blade holder 5-3 to move downward. The blade cuts the bar stock at the notch 5-4. The cut bar stock falls into the bottom opening of the feed rack 2 and then slides into the feed chute 4-1 on the conveyor belt 3.

[0042] It can precisely cut continuous bar stock to the length required for bolt processing and promptly convey it to the forming cold heading assembly 4, providing a stable supply of blanks for bolt forming. Its structural design ensures the stability of the cutting process and the accuracy of the cutting dimensions. At the same time, it works closely with other components to ensure that the entire bolt forming machine's production process is smooth and efficient, meeting the needs of bolt mass production.

[0043] For example, such as Figure 3 As shown, the top of the limiting push block 4-3 is an inclined structural surface, and the side surface of the limiting push block 4-3 is an arc-shaped structural surface. The arc of the side surface of the limiting push block 4-3 matches the arc of the surface of the conveyor belt 3.

[0044] In some examples, the special structural design of the limiting pusher 4-3 optimizes the bar stock pushing process. The inclined top surface facilitates the smooth pushing of the bar stock to the bottom opening of the feed rack 2, reducing pushing resistance; the arc-shaped side surface matches the curvature of the conveyor belt 3, allowing the limiting pusher 4-3 to fit tightly against the conveyor belt 3 when pushing the bar stock, preventing the bar stock from slipping or deviating during the pushing process, ensuring accurate feeding position, and improving the stability and reliability of feeding and cutting.

[0045] For example, such as Figure 2 As shown, a sliding frame 6 is provided on the side surface of the base 1, and the sliding frame 6 is located at the bottom of the conveyor belt 3.

[0046] In some examples, the sliding rack 6 on the side surface of the base 1 is installed at the bottom of the conveyor belt 3, and its inclined arrangement forms a sliding channel. The formed bolts move to the end under the drive of the conveyor belt 3, and slide down the sliding rack 6 by gravity to achieve automatic collection. This structural design avoids bolts accumulating on the conveyor belt 3 and affecting subsequent processing, simplifies the collection process, and makes the unloading process of the cold heading device more efficient and orderly.

[0047] For example, such as Figure 1 As shown, the protrusion height of the end face of the forming head 4-12 increases from low to high.

[0048] In some examples, the protrusion height of the forming head 4-12 increases from low to high, a gradient design that aligns with the bolt forming process. In the initial stages of bolt forming, the lower-height forming head 4-12 performs preliminary shaping of the blank; as forming progresses, the higher-height forming head 4-12 further compresses the blank, gradually completing the precise forming of the bolt head, threads, and other parts, ensuring dimensional accuracy of each part of the bolt and improving forming quality.

[0049] In actual use: The bar stock is fed into the feeding frame 2 through the feed port 5-5 of the base 1. The linear drive pushes the limiting push block 4-3 through the rectangular opening 4-2, pushing the bar stock to the designated position. The cutting hydraulic cylinder 5-2 on the upright frame 5-1 drives the cutting blade holder 5-3 downward, cutting the bar stock through the notch 5-4 at the top of the feeding frame 2. The cut billet falls into the feed chute 4-1 of the conveyor belt 3 through the bottom opening of the feeding frame 2. The conveyor belt 3 moves the billet, and the top plate 4-4 prevents the billet from jumping out. When the billet reaches the forming station, the vertical linear drive on the rectangular plate 4-5 drives the forming frame 4-6 to rise and fall along the stabilizing bar 4-8, and the forming chute 4-7 aligns and closes with the feed chute 4-1. The telescopic hydraulic cylinder 4-10 on the fixed frame 4-9 pushes the pressure seat 4-11, so that the forming head 4-12 cold-forges the blank in order from low to high according to the protrusion height. After forming, the forming frame 4-6 is retracted, and the conveyor belt 3 sends the bolt to the end, where it slides down and is collected by the sliding frame 6, completing the bolt cold-forging process.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure 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 this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A cold heading device for a bolt forming machine, characterized in that, include: The base (1) and the feed rack (2) are vertically fixed to the surface of the base (1); Feed cutting assembly (5), the feed cutting assembly (5) is disposed on the top of the base (1); A conveyor belt (3) and a forming cold heading assembly (4), wherein the conveyor belt (3) is mounted on the surface of the base (1) and the forming cold heading assembly (4) is disposed on the conveyor belt (3) and the base (1); The forming cold heading assembly (4) includes several feeding troughs (4-1), which are evenly opened on the surface of the conveyor belt (3). The bottom side of the feeding rack (2) has an open structure. The bottom opening of the feeding rack (2) is located on one side of the conveyor belt (3). A rectangular opening (4-2) is opened on the side surface of the feeding rack (2). The surface of the base (1) is connected to a limiting push block (4-3) by a linear drive. The limiting push block (4-3) passes through the rectangular opening (4-2) and is located in the feeding rack (2).

2. The cold heading device for a bolt forming machine according to claim 1, characterized in that, The feed rack (2) has a top plate (4-4) on one side, the top plate (4-4) is located on the top of the conveyor belt (3), and a pair of rectangular plates (4-5) are provided on the surface of the base (1). Each of the rectangular plates (4-5) is connected to a forming frame (4-6) by a vertical linear drive.

3. The cold heading device for a bolt forming machine according to claim 2, characterized in that, The forming frame (4-6) has several forming grooves (4-7) on its surface. The forming grooves (4-7) correspond to the material feeding groove (4-1). The base (1) has a pair of stabilizing blocks (4-8) on its upper and lower ends. The forming frame (4-6) is slidably attached to the stabilizing blocks (4-8).

4. The cold heading device for a bolt forming machine according to claim 3, characterized in that, The base (1) is provided with a fixing frame (4-9), and a telescopic hydraulic cylinder (4-10) is installed on the fixing frame (4-9). The output end of the telescopic hydraulic cylinder (4-10) is provided with a pressure seat (4-11), and the surface of the pressure seat (4-11) is provided with a plurality of forming heads (4-12).

5. The cold heading device for a bolt forming machine according to claim 1, characterized in that, The feeding and cutting assembly (5) includes a stand (5-1), which is fixed to the top of the base (1). A cutting hydraulic cylinder (5-2) is installed on the stand (5-1). A cutting blade holder (5-3) is provided at the output end of the cutting hydraulic cylinder (5-2). A notch (5-4) is opened at the top of the feeding frame (2). The notch (5-4) is located directly below the cutting blade holder (5-3). A feeding port (5-5) is opened on the surface of the base (1).

6. The cold heading device for a bolt forming machine according to claim 1, characterized in that, The top of the limiting push block (4-3) is an inclined structural surface, and the side surface of the limiting push block (4-3) is an arc-shaped structural surface. The arc of the side surface of the limiting push block (4-3) matches the arc of the surface of the conveyor belt (3).

7. The cold heading device for a bolt forming machine according to claim 1, characterized in that, A material slide (6) is provided on the side surface of the base (1), and the material slide is located at the bottom of the conveyor belt (3).

8. The cold heading device for a bolt forming machine according to claim 4, characterized in that, The protrusion height of the end face of the forming head (4-12) increases from low to high.

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