A drawing die with a detachable and automatically replaceable drawing die core

Abstract

The present invention discloses a drawing die with a detachable and automatically replaceable drawing die core, belonging to the field of metal processing. It includes a drawing die core, a die core cavity for providing a fixed position for the drawing die core, a die plate for providing positioning support for the die core cavity, a base for providing longitudinal position fixation for the die plate, a rotating shaft assembly for providing circumferential rotation for the die plate, and a locking mechanism for fixing the die plate in the base. The drawing die with a detachable and automatically replaceable drawing die core of the present invention is convenient for replacing the die core and cleaning the drawing residue, and also realizes the situation that the equipment does not need manual die replacement during the multi-pass processing of products in the same batch. In addition, the circumferentially arranged drawing die cores can flexibly adjust the drawing passes, and combine the drawing die with the drawing positioning hole, simplifying the operation process and steps and saving production costs.

Description

Technical Field

[0001] The present invention belongs to the field of metal processing and relates to a drawing die set for wire drawing processing; in particular, it relates to a drawing die capable of detachably and automatically replacing a drawing die core. Background Art

[0002] The drawing process is a commonly used process in the field of metal processing. By pulling a specimen through a conical die in a single pass or multiple passes, the cross-sectional area of the specimen is continuously reduced. This non-cutting process has high machining accuracy and can be used for the forming of wires, wire rods, tubes, etc. made of materials such as steel and non-ferrous metals, with a wide range of uses. Existing drawing dies usually include four parts, namely a bracket, a fixed die base fixed on the bracket, a die box, and a drawing die core placed in the die box. Due to production process reasons, multiple draws are usually required to gradually reduce the size (usually referred to as drawing passes). This requires frequent replacement of drawing die cores of different specifications and sizes during drawing. Currently, most of the replacement of drawing die cores relies on manual labor, increasing labor costs, which seriously restricts the development of the automation process of equipment. Moreover, after each batch of drawing procedures is completed, whether cleaning the die core or directly proceeding with the next batch of drawing, the required drawing die cores need to be sorted again in sequence. This repetitive mechanical labor undoubtedly reduces labor productivity. At the same time, due to the inherent limitations of manual operation, on the one hand, there are safety risks during die replacement, and on the other hand, it is easy to miss individual dies, thus affecting the preparation performance of the material and failing to achieve the desired processing effect.

[0003] Based on this, many researchers have conducted research and development on the structural design of drawing dies. For example, the design of a separable drawing die (CN 109877175 A) has successfully simplified the die entry process, or the structure of a double die box (CN110479783 A) has achieved the function of automatically replacing the die core, etc. However, there is still room for improvement. Taking the double die box (CN110479783 A) as an example, due to the limitations of the design structure, the operation flexibility of the equipment is poor. After completing a certain pass of drawing, if you want to perform drawing for a non-adjacent pass, all the drawing die cores must be reinstalled into the spare die warehouse in sequence from the recycling box. Similarly, when proceeding with the next batch of drawing of the same pass after completing a batch of drawing, all the drawing die cores also need to be installed in sequence. Therefore, although there are a wide variety of drawing dies designed and developed so far, most of the devices are bulky, the structures are cumbersome, requiring more material and energy costs, or they do not achieve true automation. With the rising cost of labor, all fields of the industry have begun to improve the level of automated production and vigorously promote intelligent upgrading. Enterprises hope to control costs and improve quality and efficiency through the automation of equipment. Summary of the Invention

[0004] Objective of the Invention: The objective of the present invention is to provide a drawing die with a detachable and automatically replaceable drawing die core.

[0005] Technical Solution: A drawing die with a detachable and automatically replaceable drawing die core according to the present invention, the drawing die includes a drawing die core, a die core cavity for providing a fixed position for the drawing die core, a die plate for providing positioning support for the die core cavity, a base for fixing the die plate, and a rotating shaft assembly for providing circumferential rotation for the die plate;

[0006] Locking mechanisms are provided on the front and rear sides of the base, and an outer circumferential round hole and a petal-shaped outer ring that cooperate with the locking mechanisms are provided on the die plate.

[0007] Furthermore, the locking mechanism includes a torsion spring, a slide rail fixed inside the base, a spring rod and a spring that can move on the slide rail under the rotation of the petal-shaped outer ring, and a hook that can rotate within an angle range of 0° to 45° under the combined action of the spring rod and the spring;

[0008] The slide rail is fixedly installed on the inner wall of the base by screws, and a spring rod and a spring connected to each other are movably installed on the slide rail;

[0009] A hook is also installed on the inner wall of the base, below the slide rail, and a torsion spring is movably installed on the hook;

[0010] The hook can rotate and be embedded into the outer circumferential round hole of the die plate.

[0011] Furthermore, the die plate is separable from the base, the die plate is a detachable disc, including two symmetric parts in the front and rear, and is closed and fixed by two hexagon bolts. The outer circle of the drawing die is a disc, and circumferentially arranged outer circumferential round holes are provided on the disc, and the inner circle edge is a uniformly distributed petal-shaped outer ring.

[0012] Furthermore, the drawing die includes a plurality of die core cavities matching the size of the drawing die core, the die core cavities are circumferentially arranged around the outer circle of the die plate, and a plurality of drawing die cores are respectively placed in the die core cavities.

[0013] Furthermore, a base is provided at the bottom of the die plate. The die core cavity at the lowest point of the circumference of the base is the working position, and the positions of two adjacent die core cavities near the working position form the waiting replacement position. Rotating shaft assemblies are provided on the left and right sides of the base. The rotating shaft assembly includes a left rotating shaft, a right rotating shaft, and a motor for driving the rotation of the rotating shaft. The motor can rotate the rotating shaft and then drive the clockwise or counterclockwise rotation of the die plate to rotate a drawing die core at the waiting replacement position to the working position.

[0014] Furthermore, relative rotation between the base and the die plate is carried out by using ball bearings, and only circumferential movement of the die plate is allowed.

[0015] Further, the locking mechanism has a first use position and a second use position. When the locking mechanism is in the first use position, the spring rod is in a spring-open state, the hook loses the pressure of the spring rod and is embedded in the outer peripheral circular hole, the mold plate is circumferentially fixed, and the drawing die core is located at the working station at this time. When the rotating shaft rotates the mold plate, the petal-shaped outer ring drives the spring rod to move, and the spring rod gradually enters a pressed state, driving the spring-open hook to reach the second use position, and the locking is released. When the mold plate equipped with the drawing die core continues to rotate, the interaction between the spring rod and the outer peripheral petal-shaped outer ring structure causes the spring rod to be in a spring-open state again, and the hook is re-embedded in the outer peripheral circular hole, reaching the first use position, and moving the drawing die core at the waiting-for-replacement working station to the working station.

[0016] Advantages: Compared with the prior art, the features of the present invention are as follows: 1. In the case of multi-pass drawing deformation, after each pass of drawing is completed, an instruction is issued by the motor control system, the mold plate is rotated by the rotating shaft, and then the locking mechanism is ingeniously combined with the petal-shaped outer ring to automatically replace the die core. At the same time, the mold plate is locked horizontally and vertically. During the multi-pass drawing process of the same batch, there is no need for manual replacement of the drawing die core, reducing labor costs and improving production efficiency; 2. In the detachable mold plate designed in the present invention, the mold plate itself can be disassembled into two symmetrical parts, and different specifications of die cores can be replaced to meet various processing requirements. In addition, the detachable structure of the mold plate and the base can clean the waste generated during the drawing process in time without disturbing the order of the drawing die cores, avoiding the work of repeated sorting; 3. By adjusting the rotation of the rotating shaft, the required specification of the drawing die core can be flexibly moved to the working station, which can meet the drawing of non-adjacent passes and different diameter wire materials in a batch of drawing; 4. The overall structure combines the drawing die core and the positioning hole into one, saving costs and avoiding the possibility of human operation errors. The detachable automatic replacement drawing die core drawing mold of the present invention provides the possibility for the full automation and lightweight of future equipment, greatly reducing the workload of operators and conforming to the trend and tendency of social development. Description of the Drawings

[0017] Figure 1 is the front view of the drawing mold in the present invention;

[0018] Figure 2 is the cross-sectional view of the drawing mold in the present invention;

[0019] Figure 3 is Figure 2 the leftward cross-sectional view of the A-A section in

[0020] Figure 4 is Figure 2 the downward cross-sectional view of the B-B section in

[0021] Figure 5 is the state diagram of the locking part of the drawing mold in the present invention after rotating to the first position;

[0022] Figure 6 Schematic diagram of the state after the locking member of the drawing die of the present invention rotates to the second position;

[0023] Wherein: 1. Die plate; 2. Outer peripheral round hole; 3. Hexagonal bolt; 4. Die core cavity; 5. Base; 6. Rotating shaft assembly; 7. Torsion spring; 8. Elastic rod; 9. Hook; 10. Motor; 11. Ball; 12. Drawing die core; 13. Petal-shaped outer ring; 14. Slide rail; 15. Central axis. Specific embodiments

[0024] In order to more clearly illustrate the technical solutions of the present invention, the technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings:

[0025] As Figures 1 - 5 shown, a drawing die with a detachable and automatically replaceable drawing die core according to the present invention, the drawing die includes a drawing die core 12, a die core cavity 4 providing a fixed position for the drawing die core 12, a die plate 1 providing positioning support for the die core cavity 4, a base 5 fixing the die plate 1, a rotating shaft assembly 6 providing circumferential rotation for the die plate 1, and a locking mechanism in the base 5 for fixing the die plate 1.

[0026] Specifically, the die plate 1 is separable from the base 5; the die plate 1 is a detachable disc, including two symmetric parts before and after, and is closed and fixed by two hexagonal bolts 3;

[0027] The outer ring of the drawing die is a disc, and circumferentially arranged outer peripheral round holes 2 are provided on the disc, and a uniformly distributed petal-shaped outer ring 13 is provided at the inner ring edge thereof;

[0028] The drawing die includes a plurality of die core cavities 4 matching the size of the drawing die core 14, the die core cavities 4 are circumferentially arranged around the outer ring of the die plate 1, and the plurality of drawing die cores 12 are respectively placed in the die core cavities 4.

[0029] Further, a base 5 is provided at the bottom of the die plate 1, the die core cavity 4 at the lowest point of the circumference of the base 5 is the working position, the positions of two die core cavities 4 adjacent to the working position form a position to be replaced, and rotating shaft assemblies 6 are provided on the left and right sides of the base 5, the rotating shaft assembly includes a left rotating shaft, a right rotating shaft and left and right motors 10 for driving the rotating shaft to rotate, and the two motors 10 on both sides can respectively drive the central axes 15 on both sides to rotate the die plate 1, and rotate a drawing die core 12 at the position to be replaced to the working position;

[0030] By controlling the motors 10, the rotation directions of the rotating shafts on both sides can be adjusted, and further the rotation direction of the die plate 1 can be changed, so as to realize flexible adjustment of the required drawing die core 12 at the working position;

[0031] If the mold plate 1 needs to rotate clockwise, the rotating shafts on both sides need to rotate counterclockwise.

[0032] Furthermore, the base 5, the mold plate 1, and the rotating shaft assembly 6 are relatively rotated by means of the ball bearings 11, and only the circumferential movement of the mold plate 1 and the rotating shaft assembly 6 is allowed;

[0033] There are locking mechanisms on the front and rear sides of the base 5;

[0034] The locking mechanism includes a torsion spring 7, a slide rail 14, an elastic rod 8 that can move on the slide rail 14 when the petal-shaped outer ring 13 rotates, and a hook 9 that can rotate within 0° to 45° under the joint action of the elastic rod 8 and the spring, and the hook 9 can rotate and be embedded in the outer peripheral circular hole 2 of the mold plate 1;

[0035] Specifically, the slide rail 14 is fixed on the inner wall of the base 5 by screws, and an elastic rod 8 and a spring connected to each other are movably mounted on the slide rail 14 to allow the elastic rod 8 to move up and down;

[0036] A hook 9 is also arranged on the inner wall of the base 5 and the lower side of the slide rail 14, and a torsion spring 7 is movably arranged on the hook 9. The torsion spring 7 is installed in the hook 9 to maintain the hook 9 to rotate within a circle with an angle less than 45°.

[0037] The locking mechanism has a first use position and a second use position. When the locking mechanism is in the first use position, the spring rod 8 is in a spring-open state, and the hook 9 loses the pressure of the spring rod 8 and is embedded in the outer circumferential hole 2, circumferentially fixing the mold plate 1, and the drawing mold core 12 is at the working position at this time;

[0038] When the rotating shaft assembly 6 rotates the mold disc 1, the petal-shaped outer ring 13 drives the spring rod 8 to move, and the spring rod 8 is gradually in a pressed-in state, and the spring-open hook 9 reaches the second use position, and the lock is released. When the mold disc 1 equipped with the drawing mold core 12 continues to rotate, the interaction between the spring rod 8 and the peripheral petal-shaped outer ring 13 structure makes the spring rod 8 in a spring-open state again, and the hook 9 is re-embedded in the peripheral circular hole 2 to reach the first use position, and the drawing mold core 12 at the workstation to be replaced is moved to the workstation.

[0039] Example

[0040] The process of using the drawing die with a detachable and automatically replaceable drawing die core 12 of the present invention is as follows: before drawing, the die plate 1 is removed from the base 5, the die plate 1 can be opened by loosening the hexagonal bolt 3, and the required drawing die cores 12 are sequentially placed in the circumferentially arranged (assuming clockwise) die core cavities 4, and after installation, they are placed back on the base 5;

[0041] When it is necessary to replace the drawing die core 12 after the drawing process of one pass is completed, a die change instruction is issued by the automatic control program of the equipment. The motor 10 drives the two side rotating shafts to start rotating in the same direction (clockwise) with a force greater than that fixed by the hook 9, and then rotates the die plate 1 counterclockwise. At this time, as the distance between the elastic rod 8 and the petal-shaped outer ring 13 becomes smaller and smaller, the elastic rod 8 is continuously pressed by the petal-shaped outer ring 13, and the position of the elastic rod 8 moves downward and gradually bounces up the hook 9 (see Figure 6 ). At this time, the motor 10 continues to work, the distance between the elastic rod 8 and the petal-shaped outer ring 13 becomes larger and larger, the elastic rod 8 rises and gradually separates from the hook 9, and the elastic rod 8 that loses pressure is embedded in the outer peripheral round hole 2 again to circumferentially fix the die plate 1 (see Figure 5 ), and the next drawing die core 12 is successfully rotated from the waiting replacement station to the working station; thus, a die change cycle is completed;

[0042] The multi-pass drawing process after that is cycled according to the above die change process until the last pass of drawing; after all passes of drawing are completed, the die plate 1 can be removed from the base 5 as a whole to directly clean the remaining material adhered to the drawing die core 12 during the drawing process. After cleaning, if the drawing process of the same batch continues, the die plate 1 can be placed back on the base 5 again without disturbing the order of the drawing die cores 12.

[0043] In summary, the drawing die with a detachable and automatically replaceable drawing die core of the present invention can truly achieve the effect of flexible and automatic die change through machine control and structural design in the case of multi-pass drawing, saving manpower, improving the operation accuracy rate and drawing efficiency. In addition, the detachable design is not only beneficial to cleaning the drawing remaining material but also convenient for replacing die cores of different specifications. It promotes the development of equipment automation and has good practical significance.

[0044] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. A drawing die with a detachable and automatically replaceable drawing die core, characterized in that, The drawing die includes a die plate, a fixed die plate, a base, and a rotating shaft assembly for providing circumferential rotation to the die plate; Locking mechanisms are installed on the front and rear sides of the base; The outer ring of the die plate is a disc, and a number of outer peripheral circular holes adapted to the locking mechanisms are arranged circumferentially on the die plate. The inner ring edge is a uniformly distributed petal-shaped outer ring; A number of die core cavities are evenly arranged on the die plate, and adapted drawing die cores are arranged in the die core cavities; The locking mechanism includes a slide rail, which is fixedly installed on the inner wall of the base by screws. A spring rod and a spring are movably installed on the slide rail and are connected to each other; A hook is also installed on the inner wall of the base, below the slide rail. A torsion spring is movably installed on the hook; The hook is rotationally inserted into the outer peripheral circular hole of the die plate; The die plate and the base are in a separated state; The die plate is a detachable disc, including two symmetric parts in the front and rear, and is closed and fixed by two installed hexagonal bolts; A number of the die core cavities are arranged circumferentially around the outer periphery of the die plate; A number of the drawing die cores are respectively arranged in the die core cavities; Rotating shaft assemblies are installed on the left and right sides of the base; The rotating shaft assembly includes a left rotating shaft, a right rotating shaft, and left and right motors for driving the rotation of the rotating shaft assembly; The motors on both sides are respectively connected to the rotating shafts on both sides by the central axes, and each drives the rotation of one side of the rotating shaft; Ball bearings are installed between the base and the die plate, and between the base and the rotating shaft assembly; Relative rotation between the base and the die plate, and between the base and the rotating shaft assembly is achieved through the ball bearings.

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