A bolt manufacturing process

Abstract

This invention provides a bolt manufacturing process, comprising the following steps: S1, blanking; S2, machining; S3, heating, wherein the machined blank is conveyed to a heating furnace assembly for heating, the heating furnace assembly including a heating furnace body and an automatic conveyor frame for conveying workpieces, the automatic conveyor frame being a chain conveyor frame, wherein one end of several workpiece positioning rods is fixedly arranged on the chain of the automatic conveyor frame, the other end of the workpiece positioning rods being a free end, the workpiece positioning rods having limit grooves and through holes communicating with the limit grooves, the width of the through holes being smaller than the size of the limit grooves, the head of the blank engaging with the limit grooves, and the neck of the blank engaging with the through holes; S4, temperature detection and product screening; S5, removing oxide scale using a descaling machine and sending the workpiece into a turning device for turning; S6, secondary temperature measurement; S7, sending the formed workpiece into a chamfering machine for chamfering; S8, thread rolling; S9, heat treatment.

Description

Technical Field

[0001] This application relates to the field of bolt processing, and more specifically, to a bolt manufacturing process. Background Technology

[0002] Bolts are a common hardware accessory in daily life, and their consumption is enormous. Therefore, every hardware manufacturing company is striving to improve bolt production efficiency. During the production and processing of bolts, they are usually formed by forging and machining. Before forging, they need to be heated to reach the forging temperature. Since bolts are processed in batches, the number of bolts entering the heating furnace each time is huge. However, the current heating furnace capacity of enterprises is limited, resulting in low heating efficiency. Moreover, the current method of heating bolts in the heating furnace is usually to stack them in a container and heat them in the furnace, which results in uneven heating. Therefore, during temperature screening, many bolts need to be reheated, and some parts with excessively high temperatures need to be compensated for by other processes. Therefore, the current heating furnace cannot achieve the goal of uniform heating.

[0003] Therefore, those skilled in the art need to improve existing bolt manufacturing processes to overcome the aforementioned technical problems. Summary of the Invention

[0004] The main objective of this application is to provide a bolt manufacturing process that uses a chain conveyor to improve heating efficiency and places the bolts one by one on the workpiece positioning rod for more uniform heating.

[0005] To achieve the above objectives, in a first aspect, this application provides a bolt manufacturing process, comprising the following steps:

[0006] S1. Blanking: The round bar is cut into blanks of the specified dimensions using cutting equipment.

[0007] S2. Machining: The blank is transported to a CNC machine tool for turning the outer diameter and chamfering.

[0008] S3. Heating: The machined blank is conveyed to a heating furnace assembly for heating. The heating furnace assembly includes a heating furnace body and an automatic conveyor frame for conveying workpieces. The automatic conveyor frame is a chain conveyor frame. Several workpiece positioning rods are fixedly installed on one end of the chain of the automatic conveyor frame. The other end of the workpiece positioning rod is a free end. The workpiece positioning rod has a limiting groove and a through hole connected to the limiting groove. The width of the through hole is smaller than the size of the limiting groove. The head of the blank mates with the limiting groove, and the neck of the blank mates with the through hole.

[0009] S4. Temperature detection and product screening: The temperature of the heated billet is detected by the temperature detection element and compared with the preset temperature range. Products with the temperature within the preset temperature range are transported to the dephosphorizer for dephosphorization, while products with the temperature outside the preset temperature range are pushed into the high and low temperature material box by the pushing mechanism.

[0010] S5. Use a descaling machine to remove the oxide scale and then feed the workpiece into a turning device for turning.

[0011] S6. Secondary temperature measurement: Workpieces with qualified temperature are sent into the mold by a robot arm for forging, while workpieces with unqualified temperature are sent into the scrap bin by a robot arm.

[0012] S7. After the workpiece is formed, it is sent to the chamfering machine for chamfering. After the chamfering is completed, it is sent to the CNC machine tool for internal step surface processing.

[0013] S8. After machining, the workpiece is sent to the thread rolling machine for thread rolling.

[0014] S9. Heat treatment is performed after thread rolling.

[0015] Optionally, the chain conveyor in step S3 is arranged in a wave-like pattern inside the heating furnace.

[0016] Optionally, the chain conveyor includes multiple sprockets rotatably disposed within the heating furnace, a chain arranged in a ring and cooperating with the sprockets, and one end of the workpiece positioning rod is fixedly connected to the chain.

[0017] Optionally, one end of the workpiece positioning rod is detachably connected to the chain via a snap-fit ​​connector.

[0018] Optionally, the pushing mechanism includes a driving mechanism and a slidably disposed pushing plate, the lower end face of which cooperates with the limiting groove.

[0019] Optionally, the drive mechanism is a cylinder or an electric push rod.

[0020] Optionally, the heating furnace is a medium-frequency furnace.

[0021] The bolt manufacturing process provided by this invention has the following advantages compared with the prior art: it adopts a chain conveyor frame that is distributed in a wave shape in the heating furnace, making full use of the space in the heating furnace, increasing the heating path, and greatly improving the heating efficiency. In addition, each bolt is suspended on the workpiece positioning rod one by one, which prevents the parts from stacking together, resulting in more uniform heating and smaller temperature difference. This leads to a higher pass rate during temperature screening, thereby greatly improving production efficiency and reducing production costs. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0023] Figure 1 This is a schematic diagram of a heating furnace;

[0024] Figure 2 This is a schematic diagram of the workpiece positioning rod.

[0025] The components include: 1. heating furnace, 2. sprocket, 3. chain, 4. workpiece positioning rod, 5. limiting groove, and 6. perforation. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] In addition, the term "multiple" should mean two or more.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] A bolt manufacturing process includes the following steps:

[0033] S1. Blanking: The round bar is cut into blanks of the specified dimensions using cutting equipment.

[0034] S2. Machining: The blank is transported to a CNC machine tool for turning the outer diameter and chamfering.

[0035] S3. Heating: The machined blank is conveyed to heating furnace 1 for heating, such as... Figure 1 , Figure 2 As shown, the heating furnace 1 assembly includes a heating furnace 1 body and an automatic conveyor frame for conveying workpieces. The automatic conveyor frame is a chain conveyor frame. Several workpiece positioning rods 4 are fixedly arranged on one end of the chain 3 of the automatic conveyor frame. The other end of the workpiece positioning rod 4 is a free end. The workpiece positioning rod 4 has a limiting groove 5 and a through hole 6 connected to the limiting groove 5. The width of the through hole 6 is smaller than the size of the limiting groove 5. The head of the billet cooperates with the limiting groove 5, and the neck of the billet cooperates with the through hole 6.

[0036] S4. Temperature detection and product screening: The temperature of the heated billet is detected by the temperature detection element and compared with the preset temperature range. Products with the temperature within the preset temperature range are transported to the dephosphorizer for dephosphorization, while products with the temperature outside the preset temperature range are pushed into the high and low temperature material box by the pushing mechanism.

[0037] S5. Use a descaling machine to remove the oxide scale and then feed the workpiece into a turning device for turning.

[0038] S6. Secondary temperature measurement: Workpieces with qualified temperature are sent into the mold by a robot arm for forging, while workpieces with unqualified temperature are sent into the scrap bin by a robot arm.

[0039] S7. After the workpiece is formed, it is sent to the chamfering machine for chamfering. After the chamfering is completed, it is sent to the CNC machine tool for internal step surface processing.

[0040] S8. After machining, the workpiece is sent to the thread rolling machine for thread rolling.

[0041] S9. Heat treatment is performed after thread rolling.

[0042] It should be noted that, by using a moving heating method, the chain conveyor frame described in step S3 is distributed in a wave shape within the heating furnace 1, which increases the path for the workpiece to move within the heating furnace 1, which is equivalent to increasing the heating time. This results in higher heating efficiency and avoids localized overheating or underheating, thus making the heating more uniform. Furthermore, the use of a flowing heating method further enhances the heating efficiency. In addition, to ensure more uniform heating of each part and avoid stacking, a workpiece positioning rod 4 is used to suspend the workpiece on the workpiece positioning rod 4. This prevents each part from overlapping and ensures more uniform heating.

[0043] Specifically, the chain conveyor includes multiple sprockets 2 rotatably disposed within the heating furnace 1, and a chain 3 arranged in a ring and cooperating with the sprockets 2. One end of the workpiece positioning rod 4 is fixedly connected to the chain 3.

[0044] To facilitate subsequent maintenance and upkeep, one end of the workpiece positioning rod 4 is detachably connected to the chain 3 via a snap-fit ​​connector.

[0045] In order to achieve automatic screening of workpieces after temperature measurement, the pushing mechanism includes a driving mechanism and a slidingly arranged pushing plate. The lower end face of the pushing plate cooperates with the limiting groove 5. The driving mechanism is a cylinder or an electric push rod.

[0046] In this embodiment, preferably, the heating furnace 1 is a medium-frequency furnace.

[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bolt manufacturing process, characterized in that, Includes the following steps: S1. Blanking: The round bar is cut into blanks of the specified dimensions using cutting equipment. S2. Machining: The blank is transported to a CNC machine tool for turning the outer diameter and chamfering. S3. Heating: The machined blank is conveyed to a heating furnace assembly for heating. The heating furnace assembly includes a heating furnace body and an automatic conveyor frame for conveying workpieces. The automatic conveyor frame is a chain conveyor frame. Several workpiece positioning rods are fixedly installed on one end of the chain of the automatic conveyor frame. The other end of the workpiece positioning rod is a free end. The workpiece positioning rod has a limiting groove and a through hole connected to the limiting groove. The width of the through hole is smaller than the size of the limiting groove. The head of the blank mates with the limiting groove, and the neck of the blank mates with the through hole. The chain conveyor frame is distributed in a wave shape inside the heating furnace. S4. Temperature detection and product screening: The temperature of the heated billet is detected by the temperature detection element and compared with the preset temperature range. Products with the temperature within the preset temperature range are transported to the dephosphorizer for dephosphorization, while products with the temperature outside the preset temperature range are pushed into the high and low temperature material box by the pushing mechanism. S5. Use a descaling machine to remove the oxide scale and then feed the workpiece into a turning device for turning. S6. Secondary temperature measurement: Workpieces with qualified temperature are sent into the mold by a robot arm for forging, while workpieces with unqualified temperature are sent into the scrap bin by a robot arm. S7. After the workpiece is formed, it is sent to the chamfering machine for chamfering. After the chamfering is completed, it is sent to the CNC machine tool for internal step surface processing. S8. After machining, the workpiece is sent to the thread rolling machine for thread rolling. S9. Heat treatment is performed after thread rolling.

2. The bolt manufacturing process as described in claim 1, characterized in that: The chain conveyor includes multiple sprockets rotatably disposed within the heating furnace, a chain arranged in a ring and cooperating with the sprockets, and one end of the workpiece positioning rod is fixedly connected to the chain.

3. The bolt manufacturing process as described in claim 2, characterized in that: One end of the workpiece positioning rod is detachably connected to the chain via a snap-fit ​​connector.

4. The bolt manufacturing process as described in claim 1, characterized in that: The pushing mechanism includes a driving mechanism and a slidingly arranged pushing plate, the lower end face of which cooperates with the limiting groove.

5. The bolt manufacturing process as described in claim 4, characterized in that: The drive mechanism is a cylinder or an electric push rod.

6. The bolt manufacturing process as described in claim 1, characterized in that: The heating furnace is a medium-frequency furnace.

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