Production process of bolt

Abstract

The invention provides a production process of a bolt. The production process comprises the following steps: S1, blanking; s2, machining is conducted; s3, heating is conducted, specifically, the machined blanks are conveyed into a heating furnace assembly to be heated, the heating furnace assembly comprises a heating furnace body and an automatic conveying frame used for conveying workpieces, the automatic conveying frame is a chain conveying frame, and one ends of a plurality of workpiece positioning rods are fixedly arranged on a chain of the automatic conveying frame; one end of the workpiece positioning rod is a fixed end, the other end of the workpiece positioning rod is a free end, a limiting groove and a through hole communicated with the limiting groove are formed in the workpiece positioning rod, the width size of the through hole is smaller than the size of the limiting groove, the head of the blank is matched with the limiting groove, and the neck of the blank is matched with the through hole; s4, temperature detection and product screening; s5, oxide skin is removed through a dephosphorization machine, and the workpiece is fed into a turnover device to be turned over; s6, carrying out secondary temperature measurement; s7, the formed workpiece is fed into a chamfering machine to be chamfered; s8, thread rolling; and S9, heat treatment.

Description

Technical Field

[0001] The present application relates to the field of bolt processing, and in particular, to a production process of bolts. Background Art

[0002] Bolts are commonly used hardware accessories in daily life, and their consumption is huge. Therefore, every hardware production company is working hard to improve the production efficiency of bolts. In the production and processing process, bolts are usually formed by forging and machining. They need to be heated to reach the forging temperature before forging. Since bolts are processed in batches, the number of bolts entering the heating furnace each time is huge. However, the capacity of the current heating furnace in the company is limited, so the heating efficiency is low. Moreover, the current way for bolts to pass through the heating furnace is usually to stack them in a container and heat them in the heating furnace, which results in uneven heating. Therefore, during temperature screening, more bolts need to be heated for a second time, and even some parts with too high temperatures need to be compensated by other process means. Therefore, the current heating furnace cannot achieve the purpose of uniform heating.

[0003] In view of this, those skilled in the art need to improve the existing production process of bolts to overcome the above technical problems. Summary of the invention

[0004] The main purpose of the present application is to provide a production process for bolts, which uses a chain conveyor to improve heating efficiency and places the bolts one by one on a workpiece positioning rod, so that heating is more uniform.

[0005] In order to achieve the above objectives, in a first aspect, the present application provides a production process for a bolt, comprising the following steps:

[0006] S1, cutting, cutting the round bar into blanks of the specified size by cutting equipment;

[0007] S2, machining, conveying the blank to the CNC machine tool for turning the outer diameter and chamfering;

[0008] S3, heating, conveying the machined blank to a heating furnace assembly for heating, the heating furnace assembly comprising a heating furnace body, an automatic conveying frame for conveying workpieces, the automatic conveying frame being a chain conveying frame, one end of a plurality of workpiece positioning rods being fixedly arranged on the chain of the automatic conveying frame, the other end of the workpiece positioning rod being a free end, a limiting groove and a through hole connected to the limiting groove being provided on the workpiece positioning rod, the width dimension of the through hole being smaller than the dimension of the limiting groove, the head of the blank being matched with the limiting groove, and the neck of the blank being matched with the through hole;

[0009] S4, temperature detection and product screening, the temperature of the heated blank is detected by a temperature detection element, and compared with a preset temperature range, the product with a temperature within the preset temperature range is transported to the dephosphorization machine for dephosphorization, and the product with a temperature outside the preset temperature range is pushed into the high and low temperature material box by a pushing mechanism;

[0010] S5, using a dephosphorization machine to remove the oxide scale and sending the workpiece into a turning device for turning;

[0011] S6, secondary temperature measurement, the workpieces with qualified temperature are sent to the die for forging by the robot, and the workpieces with unqualified temperature are sent to the waste box by the robot;

[0012] S7, sending the formed workpiece to a chamfering machine for chamfering, and after chamfering, sending it to a CNC machine tool for inner step surface processing;

[0013] S8, after machining is completed, the workpiece is sent to a thread rolling machine for thread rolling;

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

[0015] Optionally, in step S3, the chain conveyor frame is distributed in a wave shape in the heating furnace.

[0016] Optionally, the chain conveyor frame includes a plurality of sprockets rotatably disposed in the heating furnace, a chain arranged in a ring shape and matched 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 connector.

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

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

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

[0021] The bolt production process provided by the present invention has the following beneficial effects compared with the prior art: a chain conveyor is adopted and distributed in a wave shape in a heating furnace, so that the space in the heating furnace is fully utilized, the heating path is increased, and the heating efficiency is greatly improved; in addition, each bolt is suspended on a workpiece positioning rod one by one, so there is no mutual stacking of parts, the heating is more uniform, the temperature difference is small, and the qualified rate during temperature screening is higher, thereby greatly improving the production efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

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

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

[0025] Among them: 1. heating furnace, 2. sprocket, 3. chain, 4. workpiece positioning rod, 5. limiting groove; 6. perforation. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0030] In addition, the term "plurality" shall mean two or more.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] A production process for bolts comprises the following steps:

[0033] S1, cutting, cutting the round bar into blanks of the specified size by cutting equipment;

[0034] S2, machining, conveying the blank to the CNC machine tool for turning the outer diameter and chamfering;

[0035] S3, heating, conveying the machined blank to the heating furnace 1 assembly for heating, such as Figure 1 , Figure 2 As shown, the heating furnace 1 assembly includes a heating furnace 1 body, an automatic conveying frame for conveying workpieces, the automatic conveying frame is a chain 3 conveying frame, one end of a plurality of workpiece positioning rods 4 is fixedly arranged on the chain 3 of the automatic conveying frame, the other end of the workpiece positioning rod 4 is a free end, a limiting groove 5 and a through hole 6 connected to the limiting groove 5 are provided on the workpiece positioning rod 4, the width dimension of the through hole 6 is smaller than the dimension of the limiting groove 5, the head of the blank matches the limiting groove 5, and the neck of the blank matches the through hole 6;

[0036] S4, temperature detection and product screening, the temperature of the heated blank is detected by a temperature detection element, and compared with a preset temperature range, the products with a temperature within the preset temperature range are transported to the dephosphorization machine for dephosphorization, and the products with a temperature outside the preset temperature range are pushed into the high and low temperature material box by a pushing mechanism;

[0037] S5, using a dephosphorization machine to remove the oxide scale and sending the workpiece into a turning device for turning;

[0038] S6, secondary temperature measurement, the workpieces with qualified temperature are sent to the die for forging by the robot, and the workpieces with unqualified temperature are sent to the waste box by the robot;

[0039] S7, sending the formed workpiece to a chamfering machine for chamfering, and after chamfering, sending it to a CNC machine tool for inner step surface processing;

[0040] S8, after machining is completed, the workpiece is sent to a thread rolling machine for thread rolling;

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

[0042] It should be noted that, by means of mobile heating, the chain 3 conveyor frame in step S3 is distributed in a wave shape in the heating furnace 1, which increases the moving path of the workpiece in the heating furnace 1, which is equivalent to increasing the heating time, thereby making the heating efficiency higher and preventing local over-temperature or local over-temperature. The heating is more uniform, and the use of flow heating makes the heating efficiency higher. In addition, in order to make the heating of each part more uniform and avoid stacking, a workpiece positioning rod 4 is used, and the workpiece is suspended on the workpiece positioning rod 4, thereby preventing each part from overlapping and being heated more evenly.

[0043] Specifically, the chain conveyor frame includes a plurality of sprocket wheels 2 rotatably disposed in the heating furnace 1 , a chain 3 arranged in a ring shape and matched with the sprocket wheels 2 , and one end of the workpiece positioning rod 4 is fixedly connected to the chain 3 .

[0044] In order to facilitate subsequent maintenance and care, one end of the workpiece positioning rod 4 is detachably connected to the chain 3 via a snap connector.

[0045] In order to realize automatic screening of workpieces after temperature measurement, the pushing mechanism includes a driving mechanism and a sliding pushing plate, the lower end surface of the pushing plate cooperates with the limiting groove 5, and 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 only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A production process for bolts, characterized in that: The following steps are involved: S1, cutting, cutting the round bar into blanks of the specified size by cutting equipment; S2, machining, conveying the blank to the CNC machine tool for turning the outer diameter and chamfering; S3, heating, conveying the machined blank to a heating furnace assembly for heating, the heating furnace assembly comprising a heating furnace body, an automatic conveying frame for conveying workpieces, the automatic conveying frame being a chain conveying frame, one end of a plurality of workpiece positioning rods being fixedly arranged on the chain of the automatic conveying frame, the other end of the workpiece positioning rod being a free end, a limiting groove and a through hole connected to the limiting groove being provided on the workpiece positioning rod, the width dimension of the through hole being smaller than the dimension of the limiting groove, the head of the blank being matched with the limiting groove, and the neck of the blank being matched with the through hole; S4, temperature detection and product screening, the temperature of the heated blank is detected by a temperature detection element, and compared with a preset temperature range, the products with a temperature within the preset temperature range are transported to the dephosphorization machine for dephosphorization, and the products with a temperature outside the preset temperature range are pushed into the high and low temperature material box by a pushing mechanism; S5, using a dephosphorization machine to remove the oxide scale and sending the workpiece into a turning device for turning; S6, secondary temperature measurement, the workpieces with qualified temperature are sent to the die for forging by the robot, and the workpieces with unqualified temperature are sent to the waste box by the robot; S7, sending the formed workpiece to a chamfering machine for chamfering, and after chamfering, sending it to a CNC machine tool for inner step surface processing; S8, after machining is completed, the workpiece is sent to a thread rolling machine for thread rolling; S9. Heat treatment is performed after thread rolling is completed.

2. A process for producing a bolt according to claim 1, characterized in that: In step S3, the chain conveyor frame is distributed in a wave shape in the heating furnace.

3. A process for producing a bolt according to claim 2, characterized in that: The chain conveyor frame comprises a plurality of sprocket wheels rotatably arranged in the heating furnace, a chain arranged in a ring shape and matched with the sprocket wheels, and one end of the workpiece positioning rod is fixedly connected to the chain.

4. A process for producing a bolt according to claim 3, characterized in that: One end of the workpiece positioning rod is detachably connected to the chain via a snap connector.

5. A process for producing a bolt according to claim 1, characterized in that: The pushing mechanism comprises a driving mechanism and a pushing plate which is slidably arranged, and the lower end surface of the pushing plate matches with the limiting groove.

6. A process for producing a bolt according to claim 5, characterized in that: The driving mechanism is a cylinder or an electric push rod.

7. A process for producing a bolt according to claim 1, characterized in that: The heating furnace is a medium frequency furnace.

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