Device capable of being used for positioning thread rolling plate

Abstract

The utility model relates to the technical field of cold rolling thread rolling plates, in particular to a device for positioning a thread rolling plate, which comprises a base and a chassis, a rectangular groove is arranged in the middle of the base, the front end of the chassis is perforated and tapped, the middle of the chassis is connected with the base in an interference fit manner, and the front end of the chassis is fixedly connected with a thread rolling plate connecting mechanism through threads. And the connecting mechanism is connected and fixed with the thread rolling plate. And four base brackets are arranged around the base and are connected with the base. The device further comprises a rotating disc, the upper portion of the rotating disc is connected with a chassis, the chassis is connected with a lower arm through an opening, and the lower arm is composed of an inner shell and an outer shell. The upper arm and the arm connector are connected, the front end of the upper arm is connected with the front arm, the movable thread rolling plate connecting mechanism is connected to the front arm through an open hole, the thread rolling plate connecting mechanism is connected with the movable thread rolling plate, and the staggered thread pitch of the two plates and the distance between the thread rolling plates can be adjusted at will through rotation movement of the lower arm and the upper arm; the purpose of improving the percent of pass of thread rolling bolt threads is achieved.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling thread rolling plate technology, and in particular to a device that can be used for positioning thread rolling plates. Background Technology

[0002] A thread rolling die is a cutting tool specifically designed for thread rolling and is widely used in the machinery manufacturing industry. It provides high-precision, high-efficiency thread cutting and is suitable for the manufacture and repair of both internal and external threads. Proper use and maintenance of a thread rolling die can significantly improve machining quality and work efficiency. A common two-die thread rolling system typically consists of a fixed thread rolling die and a movable thread rolling die, referred to as the stationary plate and the moving plate, respectively. The thread rolling process is completed by the tangential feed of the movable thread rolling die. Due to its excellent machinability, thread rolling dies can be designed with corresponding tooth profiles for different annular grooves; and it also has good assemblability, allowing different thread rolling dies to be assembled together to form a single plate. Therefore, it has excellent synchronous rolling performance and can effectively solve the thread rolling problem of complex structures like titanium alloy bolts. As a standard thread rolling forming die, the thread rolling die is widely used in production. Fundamentally, thread rolling is a special case of thread rolling, its principle being to enlarge the diameter of the thread rolling wheel to its maximum and take an appropriate length as the die for forming the thread. The thread rolling method uses a tangential feed method, which moves the workpiece horizontally or vertically into the working area to create metal flow. The movement of the thread rolling plate drives the workpiece to rotate, thus forming threads.

[0003] Thread rolling dies are mainly installed on thread rolling machines, which are specialized equipment for rolling threads. Before thread rolling, it is necessary to select an appropriate distance between the dies based on the thread profile, major diameter, pitch diameter, minor diameter, and other requirements. During the thread rolling process, the two dies need to be staggered by half a pitch to ensure thread quality, improve processing efficiency, and extend tool life.

[0004] However, currently, the offset distance usually requires manual operation by workers. Due to the angle and the need to change the thread rolling plate for processing different specifications of threads, it is impossible to guarantee that the accurate distance between the plates can be selected every time, resulting in errors. This can cause thread folding or burrs on the thread root, reducing production efficiency. Utility Model Content

[0005] In order to effectively solve the problems in the background art mentioned above, this utility model proposes a device that can be used for positioning thread rolling plates.

[0006] The specific plan is as follows:

[0007] A device for positioning a thread rolling dies includes a base with a rectangular groove in the center, a chassis, a chassis bracket, a thread rolling die fixing connection mechanism, and a fixed thread rolling die. The chassis has eight threaded holes, a cylindrical protrusion on its upper surface, and a rectangular protrusion on its lower surface. The rectangular protrusion and the rectangular groove of the chassis form an interference fit, enclosing the chassis. The front end of the chassis has an opening with internal threads. The threaded connection mechanism at one end connects to the internal threads in the front hole of the chassis. The other end of the thread rolling die fixing connection mechanism has a cylindrical protrusion that forms a rotating pair with the cylindrical groove on the back of the fixed thread rolling die. The device also includes a turntable, a chassis connector, a lower arm, an arm connector, an upper arm, a forearm, a movable thread rolling die connecting mechanism, and a movable thread rolling die. The turntable has a circular hole on its lower surface that forms a rotating pair with a cylindrical protrusion on the upper surface of the base. The upper surface has a positioning circular hole and a keyway, connecting to the base via a key. The base is connected to a cylindrical block that forms a rotating pair with the lower arm. The lower arm is connected to the upper arm via this rotating pair. The upper arm is connected to the upper arm via a key. The upper arm has an internal shell and an interference fit with the cylindrical protrusion of the forearm. The forearm forms a rotating pair with two circular holes in the movable thread rolling plate connecting mechanism via its two cylindrical protrusions. The movable thread rolling plate connecting mechanism connects to the movable thread rolling plate via this rotating pair. Through the rotational movement of the lower and upper arms, the offset pitch of the two plates and the distance between the thread rolling plates can be adjusted arbitrarily, thereby improving the thread qualification rate of thread-rolled bolts.

[0008] Preferably, the chassis support has four members, each with two threaded holes at the top and two round holes at the bottom. The threaded holes are connected to the threaded holes in the chassis with bolts, and the round holes at the bottom are secured with locating pins.

[0009] Preferably, the turntable is connected to the base through an opening and can rotate. After positioning is completed, a fixing pin can be inserted into the positioning hole.

[0010] Preferably, the chassis surface has several round holes for inserting and fixing pins.

[0011] Preferably, the lower arm consists of an inner shell and an outer shell, and the distance between the plates can be adjusted.

[0012] Preferably, the upper arm connects the lower arm and the forearm, and can adjust the pitch of the thread rolling plates.

[0013] Preferably, the forearm is connected to the thread rolling plate connecting mechanism, which in turn connects to the movable thread rolling plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The base is connected to the chassis and four chassis supports respectively. The four chassis supports are fixed to the ground by positioning pins, thereby ensuring the position and stability of the mechanism and preventing it from tilting due to excessive force on one side.

[0016] 2. By setting a hole in the center of the turntable and fitting it onto the base, the turntable can be rotated 360 degrees by controlling the connection of the base. This maximizes the maximum stroke of the bolts on the movable thread rolling plate and ensures that the thread rolling plate interferes with the blank in the x-direction, thereby maximizing the stroke of the movable thread rolling plate and ensuring the size of the rolled bolts and the pass rate of the large-scale production process.

[0017] 3. The turntable is equipped with a positioning hole, which is used to insert a fixing pin into the positioning hole and the round hole of the base. The bottom of the base is connected to the turntable via a key connection, and the side is connected to it via a lower arm opening. By controlling the lower arm, an appropriate plate distance can be selected, thereby ensuring that the rolled thread reaches the required major diameter.

[0018] 4. Since the thread rolling pitch changes when the lower arm is adjusting the distance between the plates, the upper arm is used to adjust the staggered pitch between the thread rolling plates.

[0019] 5. The forearm ends are mainly connected to the upper arm and the movable thread rolling plate connecting mechanism, and it can rotate. Since the two thread rolling plates need to be kept parallel during the thread rolling process, the fixed thread rolling plate needs to be fixed after the two plates are parallel. If it is necessary to disassemble or observe whether the teeth of the moving plate are worn, the angle can be changed and then fixed through the movable thread rolling plate connecting mechanism.

[0020] 6. The fixed thread rolling plate remains stationary during the thread rolling process. Therefore, it is fixed at a suitable distance from the chassis through the fixed thread rolling plate connection mechanism. The distance is selected according to the distance between the plates. Attached Figure Description

[0021] Figure 1 This is an overall appearance and structural view of this application;

[0022] Figure 2 This is a schematic diagram of the left-side structure of this application;

[0023] Figure 3 This is an enlarged structural schematic diagram of the movable thread rolling plate connection mechanism at point A in this application;

[0024] Figure 4 This is an enlarged structural schematic diagram of the thread rolling plate connection mechanism at point B in this application;

[0025] Figure 5 This is a schematic diagram of the lower arm inner shell and outer shell at point C in this application.

[0026] In the diagram: 1. Chassis; 101. Base bracket; 102. Base; 2. Turntable; 201. Chassis connection; 202. Positioning hole; 203. Fixing pin; 3. Lower arm; 301. Lower arm inner shell; 302. Lower arm outer shell; 4. Upper arm; 401. Arm connection; 5. Forearm; 6. Movable thread rolling plate; 601. Movable thread rolling plate connecting mechanism; 7. Fixed thread rolling plate; 701. Fixed thread rolling plate connecting mechanism. Detailed Implementation

[0027] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0028] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0029] This application discloses a device for positioning thread rolling dies, including a chassis 1 with holes in four directions, including the center and sides. A base bracket 101 is connected to the chassis by bolts and fixed in place. The device also includes a base 102, a turntable 2, a lower arm 3, an upper arm 4, a forearm 5, a movable thread rolling die 6, and a fixed thread rolling die 7. The turntable has a positioning hole 202 for fixing. The bottom of the chassis connection 201 is connected to the turntable 2 via a key connection. The upper arm 4 is connected to the lower arm via an arm connection 401. The movable thread rolling die 6 is connected to the forearm 5 via a movable thread rolling die connecting mechanism 601. The fixed thread rolling die 7 is connected to the chassis 1 via a fixed thread rolling die connecting mechanism 701.

[0030] This structure is a device for positioning a thread rolling plate. Its base 101 is made of cemented carbide, which has high hardness, good wear resistance, and is not easily corroded, providing better stability for thread rolling and ensuring the stability of the thread rolling process. A central hole is provided at the center of the turntable, and a cylindrical protrusion on the base 1 mates with this hole, forming a rotating pair. The turntable can rotate around a fixed axis (z-axis), facilitating operation and use. Simultaneously, positioning holes 202 are provided on the surface of the turntable 2. After the thread rolling plate position is determined, the turntable and base can be fixed with fixing pins, improving the efficiency and accuracy of thread rolling. See the above description. Figure 1 , Figure 2 .

[0031] In addition, such as Figure 3 As shown, the upper arm 4 has a central opening that mates with the cylindrical surface of the forearm 5 to form a rotating pair for controlling the movement of the moving plate. Simultaneously, the movable thread rolling plate connecting mechanism 601 has central openings on its left and right sides that form rotating pairs with the left and right cylindrical surfaces of the forearm 5, respectively. The movable thread rolling plate 6 has a circular hole on its back, which can form a rotating pair with the lower cylindrical surface of the movable thread rolling plate connecting mechanism 601, thereby effectively fixing the movable thread rolling plate.

[0032] like Figure 4 As shown, the back of the fixed thread rolling plate 7 is also provided with a cylindrical protrusion for connecting with the fixed thread rolling plate connecting mechanism 701. The fixed thread rolling plate connecting mechanism 701 connects the fixed thread rolling plate 7 and the base plate 1 respectively. If necessary, different lengths of fixed thread rolling plate connecting mechanisms can be selected according to the required inter-plate distance for thread rolling. Through this mechanism, the staggered pitch of the thread rolling plates and the inter-plate distance can be adjusted flexibly to achieve stability in the thread rolling process, greatly reducing the probability of burrs on the bolt threads and thread folding.

[0033] Finally, as Figure 5 As shown, 301 is the lower arm inner shell; 302 is the lower arm outer shell, and they are connected together by welding. The purpose is to reduce the weight of the lower arm, facilitate movement, and reduce the force on the chassis.

[0034] A device for positioning thread rolling dies operates as follows: The thread rolling dies are primarily mounted on a thread rolling machine. First, the movable thread rolling die connecting mechanism and the fixed thread rolling die connecting mechanism are connected to the corresponding thread rolling dies, with the movable thread rolling die connecting mechanism maintaining the two dies parallel. Then, the base bracket is fixed using a positioning pin. Next, the base is controlled to rotate the turntable. After determining the maximum stroke of the movable thread rolling die, the fixing pin is inserted into the turntable to prevent rotation. Next, the lower arm is rotated to determine the distance between the dies in the z-direction. Then, the upper arm is controlled to determine the offset pitch of the dies in the y-direction. After positioning is complete, the device is removed, the thread rolling dies are unloaded, and the device is withdrawn, thus completing the positioning process. Therefore, this invention primarily achieves positioning in the y and z directions by manually adjusting the cooperation between the lower and upper arms based on the basic dimensions of the bolts to be rolled, ensuring the dimensions of the rolled bolts and the pass rate in large-scale production.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered as protection of the present utility model.

Claims

1. A device for positioning a thread rolling plate, comprising a base, wherein the base has a rectangular groove in the middle, characterized in that: It also includes a chassis, a chassis bracket, a thread rolling plate fixing connection mechanism, and a fixed thread rolling plate. The chassis has eight threaded holes, a cylindrical protrusion on its upper surface, and a rectangular protrusion on its lower surface. The rectangular protrusion and the rectangular groove of the base form an interference fit, enclosing the base. The front end of the chassis has an opening with internal threads. The threaded connection of one end of the fixed thread rolling plate connection mechanism connects to the internal threads in the front end of the chassis. The other end of the fixed thread rolling plate connection mechanism has a cylindrical protrusion that forms a rotating pair with the cylindrical groove on the back of the fixed thread rolling plate. It also includes a turntable, a chassis connector, a lower arm, an arm connector, an upper arm, and a forearm. The movable thread rolling plate connection mechanism includes a movable thread rolling plate. A circular hole on the lower surface of the turntable forms a rotating pair with a cylindrical protrusion on the upper surface of the base. The upper surface has a positioning circular hole and a keyway, which connects to the base via a key. The base is connected to a cylindrical block that forms a rotating pair with the lower arm. The lower arm is connected to the upper arm via the rotating pair. The upper arm is connected to the upper arm via a key. The upper arm has an internal shell and an interference fit with the cylindrical protrusion of the forearm. The forearm forms a rotating pair with two circular holes in the movable thread rolling plate connection mechanism via its two cylindrical protrusions. The movable thread rolling plate connection mechanism connects to the movable thread rolling plate via the rotating pair.

2. The device for positioning thread rolling plates according to claim 1, characterized in that: The chassis support has four parts, each with two threaded holes at the top and two round holes at the bottom; the threaded holes and the threaded holes of the chassis are connected by bolts, and the round holes at the bottom are fixed by locating pins.

3. The device for positioning thread rolling plates according to claim 1, characterized in that: The chassis surface has several round holes for inserting and fixing pins.

4. The device for positioning a thread rolling plate according to claim 3, characterized in that: The fixing pin is used to insert the fixing pin into the positioning hole of the turntable after the turntable has been determined to be in the appropriate position.

5. The device for positioning a thread rolling plate according to claim 1, characterized in that: The lower arm consists of an inner lower arm shell and an outer lower arm shell connected together by welding.

Images