Bolt cold heading forming die

Abstract

The utility model relates to the technical field of dies, in particular to a bolt cold heading forming die. The die comprises a lower die, a transition die and an upper die, a lower die inner cavity is formed in the top of the lower die, the transition die is slidably connected to the inner side of the lower die inner cavity, the upper die is assembled on the top of the transition die, a fixing frame is fixed to the position, located on the outer edge of the lower die inner cavity, of the top of the lower die, and the fixing frame is slidably connected with the upper die. Cavities on the inner sides of the lower die, the transition die and the upper die form a bolt die cavity, and a connecting mechanism is assembled between the lower die and the upper die. Through the structural design of the connecting mechanism and the auxiliary mechanism, the device can conveniently connect the lower mold and the upper mold, meanwhile, the upper mold can be ejected out in the later period, the working efficiency is improved, the flexibility of the device is improved, through the structural design of the limiting mechanism, the device can limit the ejection spring, and the service life of the ejection spring is prolonged. The use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a bolt cold heading forming mold. Background Art

[0002] Cold heading technology has high productivity, good product quality, greatly reduced material consumption, reduced production costs, and improved working conditions. Therefore, it is more and more widely used in mechanical manufacturing, especially in the production of standard fasteners. Among them, the most representative products produced by multi-station cold heading machines are bolts, screws and nuts.

[0003] For example, a bolt cold heading forming die with the publication (announcement) number CN112536414A comprises a fixed die, a clamping block and a threaded rod. A groove is provided at the upper end of the fixed die, a transition die is provided in the groove, a slider is provided on both sides of the transition die, a threaded rod is threadedly connected to the slider, one end of the threaded rod is far from each other and penetrates the fixed die, and a through hole is provided on the fixed die corresponding to the threaded rod, a plurality of clamping blocks are provided at one end of the slider close to each other, and a plurality of clamping grooves are provided at the left and right ends of the transition die corresponding to the clamping blocks, a bracket is symmetrically provided on the upper end of the fixed die, and a movable die is provided between the brackets;

[0004] In summary, it can be seen that the following technical problems exist in the prior art: during the use of the above-mentioned prior art, although it can realize the convenient disassembly and assembly of the fixed mold and the movable mold, after the internal bolts are cooled and formed, there is a lack of ejection of the transition mold, which makes it inconvenient to discharge the material later. For this reason, we propose a bolt cold heading forming mold. Utility Model Content

[0005] The utility model aims to provide a bolt cold heading forming die to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A bolt cold heading forming die comprises a lower die, a transition die and an upper die, wherein a lower die inner cavity is formed at the top of the lower die, a transition die is slidably connected to the inner side of the lower die inner cavity, an upper die is assembled on the top of the transition die, a fixed frame is fixed at the top of the lower die and located at the outer edge of the lower die inner cavity, the fixed frame is slidably connected to the upper die, the lower die, the transition die and the cavity inside the upper die constitute a bolt die cavity, a connecting mechanism is assembled between the lower die and the upper die, and the connecting mechanism is used to fix the upper die on the lower die.

[0008] Preferably, the connecting mechanism includes connecting ears, vertical plates, pressing rods, compression springs, connecting rods, folding rods and slots, connecting ears are fixed at both ends of the upper mold, vertical plates are fixed at both ends of the top of the lower mold and at positions deviating from the fixed frame, pressing rods are slidably connected to the inner sides of the vertical plates, compression springs are sleeved on the outer sides of the pressing rods, limiting caps are fixed to one end of the pressing rods, and the limiting caps are fixed to the compression springs, the other ends of the pressing rods are rotatably connected to the connecting rods via pins, one ends of the connecting rods are rotatably connected to the folding rods via pins, one end of the folding rods are rotatably connected to the lower mold via pins, and slots corresponding to the positions of the folding rods are provided at the bottoms of the connecting ears, and the slots are slidably connected to the folding rods.

[0009] Preferably, an auxiliary mechanism is installed between the lower mold and the transition mold, and the auxiliary mechanism is used to adjust the position of the transition mold.

[0010] Preferably, the auxiliary mechanism includes a first matching groove, a second matching groove, a positioning column and a top spring. The first matching groove is opened at both ends of the bottom of the transition mold, and the second matching groove is opened at the top of the inner side of the first matching groove. Positioning columns corresponding to the positions of the second matching grooves are fixed at both ends of the bottom of the inner side of the lower mold cavity. The positioning columns are clearance-fitted with the second matching grooves, and top springs are sleeved on the outer sides of the positioning columns. The bottoms of the top springs are fixed to the inner cavity of the lower mold, and the top springs are interference-fitted with the second matching grooves. Circular holes corresponding to the positions of the positioning columns are opened at the top of the inner side of the second matching grooves, and the circular holes are slidably connected with the positioning columns.

[0011] Preferably, both ends of the lower mold are equipped with limiting mechanisms, and the limiting mechanisms are used to limit the top spring.

[0012] Preferably, the limiting mechanism includes a rotating rod, an insert rod, a screw and a matching opening, the two sides of the two ends of the lower mold are rotatably connected with rotating rods, the interior of the lower mold and close to the rotating rods are provided with bar grooves, the bar grooves are connected to the inner cavity of the lower mold, the inner sides of the bar grooves are slidably connected with insert rods, one end of the rotating rods passes through the bar grooves and is fixed with a screw, the screw is threadedly connected to the insert rod, one end of the insert rod is provided with a matching opening, the matching opening is slidably connected to the positioning column, and the insert rod is slidably connected to the second matching groove.

[0013] Preferably, a hand wheel is fixed to one end of the rotating rod.

[0014] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0015] At the same time, through the above technical solutions, the utility model has at least the following beneficial effects:

[0016] 1. The utility model makes it easy to connect the lower mold and the upper mold through the structural design of the connecting mechanism and the auxiliary mechanism, and can eject the upper mold in the later stage, which speeds up the work efficiency and improves the flexibility of the device.

[0017] 2. The utility model uses the structural design of the limiting mechanism so that the device can limit the top spring, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the cutaway structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the connection structure between the lower mold and the vertical plate of the utility model;

[0022] Figure 4 It is a schematic diagram of the connection structure between the first matching groove and the transition mold of the utility model;

[0023] Figure 5 It is a schematic diagram of the cutaway structure of the lower mold of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] In the figure: 1. lower mold; 2. transition mold; 3. upper mold; 4. fixed frame; 5. connecting ear; 6. vertical plate; 7. pressing rod; 8. compression spring; 9. connecting rod; 10. folding rod; 11. notch; 12. first matching groove; 13. second matching groove; 14. positioning column; 15. top spring; 16. rotating rod; 17. insert rod; 18. screw; 19. matching mouth; 20. inner cavity of lower mold. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Example 1

[0028] Reference Figure 1-3 A bolt cold heading forming mold comprises a lower mold 1, a transition mold 2 and an upper mold 3. A lower mold inner cavity 20 is opened at the top of the lower mold 1. The inner side of the lower mold inner cavity 20 is slidably connected with the transition mold 2. The upper mold 3 is assembled on the top of the transition mold 2. A fixed frame 4 is fixed at the top of the lower mold 1 and located at the outer edge of the lower mold inner cavity 20. The fixed frame 4 is slidably connected to the upper mold 3. The cavity inside the lower mold 1, the transition mold 2 and the upper mold 3 constitutes a bolt mold cavity. A connecting mechanism is assembled between the lower mold 1 and the upper mold 3. The connecting mechanism is used to fix the upper mold 3 on the lower mold 1.

[0029] The connecting mechanism includes a connecting ear 5, a vertical plate 6, a pressing rod 7, a compression spring 8, a connecting rod 9, a folding rod 10 and a notch 11. The connecting ears 5 are fixed at both ends of the upper mold 3, and the vertical plates 6 are fixed at both ends of the top of the lower mold 1 and at positions deviating from the fixed frame 4. The inner sides of the vertical plates 6 are slidably connected to the pressing rods 7, and the outer sides of the pressing rods 7 are sleeved with compression springs 8. One end of the pressing rods 7 is fixed with a limiting cap, and the limiting caps are fixed to the compression springs 8. The other end of the pressing rods 7 is rotatably connected to the connecting rods 9 through pins, and one end of the connecting rods 9 is rotatably connected to the folding rods 10 through pins. One end of the folding rods 10 is connected to the lower mold through pins. The tool 1 is rotatably connected, and the bottom of the connecting ear 5 is provided with a notch 11 corresponding to the position of the folding rod 10. The notch 11 is slidably connected to the folding rod 10. When the lower mold 1 needs to be connected to the upper mold 3, the limiting cap is pressed to make the limiting cap push the pressing rod 7 to move and squeeze the compression spring 8 to contract, so that the pressing rod 7 pushes the folding rod 10 to rotate through the connecting rod 9, and then the upper mold 3 is inserted into the fixed frame 4. At this time, the notch 11 corresponds to the position of the folding rod 10, and the limiting cap is loosened. The elastic force generated by the compression spring 8 pushes the limiting cap and the pressing rod 7 to move and reset until the folding rod 10 is inserted into the notch 11 and connected to the notch 11.

[0030] An auxiliary mechanism is installed between the lower mold 1 and the transition mold 2 , and the auxiliary mechanism is used to adjust the position of the transition mold 2 .

[0031] The auxiliary mechanism includes a first matching groove 12, a second matching groove 13, a positioning column 14 and a top spring 15. The first matching groove 12 is opened at both ends of the bottom of the transition mold 2, and the second matching groove 13 is opened at the top of the inner side of the first matching groove 12. The two ends of the inner bottom of the lower mold cavity 20 are fixed with positioning columns 14 corresponding to the position of the second matching groove 13. The positioning columns 14 are clearance-fitted with the second matching groove 13, and the outer sides of the positioning columns 14 are sleeved with top springs 15. The bottom of the top spring 15 is fixed to the lower mold cavity 20, and the top spring 15 is interference-fitted with the second matching groove 13. The top of the inner side of the second matching groove 13 is opened with a circular hole corresponding to the position of the positioning column 14, and the circular hole is slidably connected with the positioning column 14. It can be understood that the inner size of the first matching groove 12 is larger than the inner size of the second matching groove 13, and the inner size of the second matching groove 13 is smaller than the inner diameter of the top spring 15.

[0032] Example 2

[0033] Embodiment 1 is further optimized, specifically, as Figure 4-5 As shown, both ends of the lower mold 1 are equipped with limiting mechanisms, which are used to limit the top spring 15.

[0034] The limiting mechanism includes a rotating rod 16, an insert rod 17, a screw 18 and a matching opening 19. The rotating rods 16 are rotatably connected on both sides of the two ends of the lower mold 1. Bar grooves are provided inside the lower mold 1 and near the rotating rod 16. The bar grooves are connected to the inner cavity 20 of the lower mold. The inner sides of the bar grooves are slidably connected with the insert rods 17. One end of the rotating rod 16 is fixed with a screw 18 passing through the bar groove. The screw 18 is threadedly connected to the insert rod 17. One end of the insert rod 17 is provided with a matching opening 19. The matching opening 19 is slidably connected to the positioning column 14. The insert rod 17 is slidably connected to the second matching groove 13. Through the setting of the matching opening 19, the insert rod 17 is convenient for extending into the second matching groove 13 to form a vertical limit for the top spring 15.

[0035] A hand wheel is fixed at one end of the rotating rod 16 , and the setting of the hand wheel makes it convenient for the user to rotate the rotating rod 16 .

[0036] From the above, we can know that:

[0037] The utility model aims at the technical problem that, during the use of the existing technology, although the fixed mold and the movable mold can be conveniently disassembled and assembled, after the internal bolts are cooled and formed, the transition mold is not ejected, which makes it inconvenient to discharge the material later; the technical solutions of the above embodiments are adopted. At the same time, the implementation process of the above technical solutions is:

[0038] When in use, first press the transition mold 2 to insert it into the lower mold cavity 20, so that the positioning column 14 is connected with the corresponding circular hole. At the same time, due to the interference fit between the second matching groove 13 and the top spring 15, the top spring 15 is squeezed and contracted under the limit of the second matching groove 13, until the transition mold 2 is in contact with the bottom of the inner side of the lower mold cavity 20, and then the rotating rod 16 is rotated to make the rotating rod 16 drive the screw rod 18 to rotate, so that the insertion rod 17 moves along the inner side of the strip groove until the insertion rod 17 is inserted into the second matching groove 13. At this time, the matching port 19 is in contact with the positioning column 14, and the insertion rod 17 is located at the top of the top spring 15, forming a vertical limit for the top spring 15;

[0039] After that, the upper mold 3 is connected to the lower mold 1. After the bolts are formed in the later stage, the upper mold 3 is separated from the lower mold 1, and the rotating rod 16 is rotated again to make the insertion rod 17 shrink into the strip groove, releasing the vertical limit of the top spring 15. At this time, the elastic force generated by the top spring 15 pushes the transition mold 2 upward, thereby separating the transition mold 2 from the inner cavity 20 of the lower mold, completing the ejection process, and accelerating the removal efficiency of the transition mold 2.

[0040] Through the above configuration, the present application can certainly solve the above technical problems and achieve the following technical effects:

[0041] 1. The utility model makes it easy to connect the lower mold 1 and the upper mold 3 through the structural design of the connecting mechanism and the auxiliary mechanism, and can eject the upper mold 3 at a later stage, thereby speeding up the work efficiency and improving the flexibility of the device.

[0042] 2. The utility model uses the structural design of the limiting mechanism to enable the device to limit the top spring 15, which is convenient for use.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A bolt cold heading forming die, characterized in that: The invention comprises a lower mold (1), a transition mold (2) and an upper mold (3); a lower mold inner cavity (20) is provided at the top of the lower mold (1); a transition mold (2) is slidably connected to the inner side of the lower mold inner cavity (20); an upper mold (3) is mounted on the top of the transition mold (2); a fixing frame (4) is fixed at the top of the lower mold (1) and located at the outer edge of the lower mold inner cavity (20); the fixing frame (4) is slidably connected to the upper mold (3); the cavities inside the lower mold (1), the transition mold (2) and the upper mold (3) constitute a bolt mold cavity; a connecting mechanism is mounted between the lower mold (1) and the upper mold (3); the connecting mechanism is used to fix the upper mold (3) on the lower mold (1).

2. A bolt cold heading forming die according to claim 1, characterized in that: The connecting mechanism comprises a connecting ear (5), a vertical plate (6), a pressing rod (7), a compression spring (8), a connecting rod (9), a folding rod (10) and a notch (11); the connecting ears (5) are fixed at both ends of the upper mold (3); the vertical plates (6) are fixed at both ends of the top of the lower mold (1) and at positions deviated from the fixed frame (4); the inner sides of the vertical plates (6) are slidably connected to the pressing rods (7); the outer sides of the pressing rods (7) are sleeved with compression springs (8); one side of the pressing rods (7) is The ends of the pressing rods (7) are fixed with limiting caps, the limiting caps are fixed with compression springs (8), the other ends of the pressing rods (7) are rotatably connected with connecting rods (9) through pins, one ends of the connecting rods (9) are rotatably connected with folding rods (10) through pins, one ends of the folding rods (10) are rotatably connected with the lower mold (1) through pins, and the bottoms of the connecting ears (5) are provided with notches (11) corresponding to the positions of the folding rods (10), and the notches (11) are slidably connected with the folding rods (10).

3. A bolt cold heading forming die according to claim 1, characterized in that: An auxiliary mechanism is installed between the lower mold (1) and the transition mold (2), and the auxiliary mechanism is used to adjust the position of the transition mold (2).

4. A bolt cold heading forming die according to claim 3, characterized in that: The auxiliary mechanism comprises a first matching groove (12), a second matching groove (13), a positioning column (14) and a top spring (15); the first matching groove (12) is provided at both ends of the bottom of the transition mold (2); the second matching groove (13) is provided at the top of the inner side of the first matching groove (12); the positioning columns (14) corresponding to the position of the second matching groove (13) are fixed at both ends of the inner bottom of the lower mold cavity (20); the positioning columns (14) are clearance-fitted with the second matching groove (13); the outer side of the positioning columns (14) is sleeved with a top spring (15); the bottom of the top spring (15) is fixed to the lower mold cavity (20); the top spring (15) is interference-fitted with the second matching groove (13); the inner top of the second matching groove (13) is provided with a circular hole corresponding to the position of the positioning column (14); the circular hole is slidably connected to the positioning column (14).

5. A bolt cold heading forming die according to claim 4, characterized in that: The two ends of the lower mold (1) are equipped with limiting mechanisms, and the limiting mechanisms are used to limit the top spring (15).

6. A bolt cold heading forming die according to claim 5, characterized in that: The limiting mechanism comprises a rotating rod (16), an insert rod (17), a screw rod (18) and a matching opening (19); both sides of the two ends of the lower mold (1) are rotatably connected with the rotating rod (16); the interior of the lower mold (1) and the position close to the rotating rod (16) are provided with a strip groove, and the strip grooves are connected with the inner cavity (20) of the lower mold; the inner sides of the strip grooves are slidably connected with the insert rod (17); one end of the rotating rod (16) is fixed with a screw rod (18) passing through the strip groove; the screw rod (18) is threadedly connected to the insert rod (17); one end of the insert rod (17) is provided with a matching opening (19); the matching opening (19) is slidably connected to the positioning column (14); the insert rod (17) is slidably connected to the second matching groove (13).

7. A bolt cold heading forming die according to claim 6, characterized in that: A hand wheel is fixed to one end of the rotating rod (16).

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