Improved rear positioning device of flange shaft horizontal forging die
By using a backsplash structure connected by thick steel and threads, the problems of the backsplash being easily deformed and welded during flange shaft forging are solved, and high-precision positioning and efficient production are achieved.
Patent Information
- Application Number
- CN202422387063.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-29
AI Technical Summary
During the forging of existing flange shafts, the tailgate is prone to deform, inaccurate positioning, and the welding position is prone to cracking, which affects production efficiency and accuracy.
The tailgate of 80mm thick mold special steel is adopted, combined with threaded connections and adjustable connecting rods, supporting and adjusting through studs and fastening nuts is achieved, increasing welding strength and ensuring balance of stress.
Improves the strength and positioning accuracy of the tailgate, reduces deformation and weld cracking, simplifies mold adjustment, and improves production efficiency and consistency of forging length.
Smart Images
Figure CN223171843U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of the automotive industry, and particularly relates to an improved rear positioning device for a flat forging die of a flange shaft. Background Art
[0002] During the production process of flange shaft forgings, multiple forgings are horizontally placed in the die of a flat forging machine in the left-right direction. Since the length dimension of the rod part is relatively long, the tail end of the rod part of the flange shaft forging will extend beyond the die. In order to ensure the consistency of the dimensions of multiple flange shaft forgings in the length direction, a rear positioning device is required to keep the positions of the tail ends of the rod parts of the flange shaft forgings consistent.
[0003] As Figure 1 shown, the rear positioning device with a conventional structure includes a rear baffle 1 arranged in the vertical direction. The front side of the rear baffle 1 is welded to the rear end face of the die cavity body 3 of the die through multiple steel bars 2. This rear positioning device has a simple structure and is easy to manufacture. However, during the forging process of the flange shaft forging, the following problems exist:
[0004] 1) The rear baffle 1 is made of a 20-mm-thick ordinary steel plate. Due to the axial forging force of the flange shaft forging during use, the rear baffle 1 will be bent and deformed, which affects the positioning accuracy.
[0005] 2) Since the rear baffle 1 has no support in the left-right direction, and the steel bars 2 connecting the die cavity body 3 and the rear baffle 1 are also subjected to the forging force of the flange shaft forging, there is a certain distance between the center line of the steel bars 2 and the center line of the flange shaft forging (the center of the semi-circular clamp positioning groove 4) in the left-right direction, resulting in the elongation and lateral bending of the length of the steel bars 2, which also affects the rear positioning accuracy.
[0006] 3) In actual production, due to the influence of heating temperature, die wear, and changes in the rear positioning device, etc., the dimensions of the flange shaft forging in the length direction will change, and it is necessary to adjust the rear positioning or trim the die. Since the rear positioning device with a conventional structure is fixed and cannot be adjusted, only the die can be trimmed, which is relatively cumbersome and reduces the production efficiency.
[0007] 4) The two ends of the steel bars 2 are directly welded to the surfaces of the die cavity body 3 and the rear baffle 1, and the welding process is simple. However, during use, due to the impact of the forging force, the welds at both ends of the steel bars 2 will crack, the positioning accuracy will also be reduced, and it will also affect the stable production. Summary of the Utility Model
[0008] In order to solve the above technical problems existing in the prior art, the utility model provides an improved rear positioning device for a flat forging die of a flange shaft, which has high strength, is not easily deformed, has high positioning accuracy, and is convenient to adjust.
[0009] To solve the above technical problems, the present utility model adopts the following technical solutions: An improved rear positioning device for a flat forging die of a flange shaft, comprising a rear baffle arranged in the vertical direction, the rear baffle being located directly behind the female die body of the flat forging die. A plurality of clamp positioning grooves are evenly opened from top to bottom on the left side edge of the rear baffle. A plurality of length-adjustable connecting rods are evenly arranged from top to bottom between the rear baffle and the female die body. A lateral positioning rod is provided on the rear baffle, and the right end of the lateral positioning rod is press-connected to the left side of the flat forging machine body.
[0010] Each length-adjustable connecting rod includes an internal thread sleeve and a stud both horizontally arranged in the front-rear direction. A groove is opened on the rear side surface of the female die body. The internal thread sleeve is installed in the groove and welded to the female die body by means of bevel grooving welding. A through hole is opened on the rear baffle, and the through hole and the groove are arranged at intervals in the up-down direction and the through hole is located on the right side of the groove. The right side of the stud passes through the through hole, and four fastening nuts are threadedly connected to the stud. Two of the fastening nuts are press-connected to the front side surface of the rear baffle, and the other two fastening nuts are press-connected to the rear side surface of the rear baffle.
[0011] The lateral positioning rod includes a plurality of screws evenly arranged at intervals from top to bottom. Thread holes with the same number as the screws are opened on the rear baffle. The screws extend into and are threadedly connected to the thread holes, and the right ends of the screws are press-connected to the left side of the flat forging machine body.
[0012] Adopting the above technical solutions, compared with the prior art, the present utility model has the following advantages:
[0013] 1) The rear baffle is made of 80 mm thick special die steel, which improves the strength of the rear baffle and is not easily deformed during the forging production process.
[0014] 2) The right end face of the bolt threadedly connected to the rear baffle can be pressed against the surface of the flat forging machine body, and the pressing force against the flat forging machine body can be adjusted by screwing the bolt. During the flat forging process, the impact force of the punch body on the forging is applied to the rear baffle through the clamp. Since the through hole is located on the right side of the groove, the backward impact force will generate a lateral force to the right on the stud with the stud as the fulcrum. At this time, the right end of the bolt is pressed against the flat forging machine body, playing a role in supporting the rear baffle, thereby avoiding the lateral deformation of the stud.
[0015] 3) The female die body and the rear baffle are connected by studs, and the rear baffle is fixed with double fastening nuts on both the front and the back. In this way, the rear baffle is not easily loosened during forging, and at the same time, the front and back positions of the rear baffle can be adjusted by manually adjusting the fastening nuts to meet the requirement of adjusting the length of the flange shaft forging, without the need to trim the die, which can improve the production efficiency.
[0016] 4) When the internal thread sleeve is welded to the die body, a groove matching the stud is machined on the rear side of the die body. A part of the internal thread sleeve is assembled inside the die body. Meanwhile, a welding groove is arranged at the welding position of the die body, increasing the welding strength. This can effectively avoid the problem of weld cracking.
[0017] 5) In the height direction, the clamp positioning groove is located between two adjacent studs, thus ensuring the balanced force during upset forging at each clamp positioning groove.
[0018] 6) The clamp positioning groove is U-shaped. Compared with the original semi-circular shape, its depth is increased, which is convenient for workers to place the clamp, safer and more reliable, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural view of the existing rear positioning device;
[0020] Figure 2 is a schematic structural view of the present utility model;
[0021] Figure 3 is Figure 2 the right view of DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments.
[0023] Figure 2 and Figure 3 As shown in
[0024] figures
[0025] The lateral positioning rod member includes a plurality of screw rods 10 evenly spaced from top to bottom. The rear baffle 1 is provided with threaded holes 11 having the same number as the screw rods 10. The screw rods 10 extend into and are threadedly connected to the threaded holes 11. The right end of the screw rod 10 is press-connected to the left side of the upsetting press body 5.
[0026] The utility model has the following advantages:
[0027] 1) The rear baffle 1 is made of special die steel with a thickness of 80 mm, which improves the strength of the rear baffle 1 and is not prone to deformation during the forging production process.
[0028] 2) The right end face of the bolt threadedly connected to the rear baffle 1 can be pressed against the surface of the upsetting press body 5, and the top pressure against the upsetting press body 5 can be adjusted by screwing the bolt. During the upsetting process, the impact force of the punch body on the forging is applied to the rear baffle 1 through the clamp. Since the light hole 8 is located on the right side of the groove, the backward impact force will generate a lateral force to the right on the stud 7 with the stud 7 as the fulcrum. At this time, the right end of the bolt is pressed against the upsetting press body 5, playing a role in supporting the rear baffle 1, thereby avoiding the lateral deformation of the stud 7.
[0029] 3) The die body 3 and the rear baffle 1 are connected by studs 7, and the rear baffle 1 is fixed with double fastening nuts 9 both front and back. In this way, the rear baffle 1 is not easily loosened during forging, and at the same time, the front and back positions of the rear baffle 1 can be adjusted by manually adjusting the fastening nuts 9 to meet the requirement of adjusting the length of the flange shaft forging, without the need to trim the die, which can improve the production efficiency.
[0030] 4) When the internal thread sleeve 6 is welded to the die body 3, a groove matching the stud 7 is machined on the rear side of the die body 3. A part of the internal thread sleeve 6 is assembled inside the die body 3, and at the same time, a welding groove is provided at the welding position of the die body 3, increasing the welding strength. In this way, the problem of weld cracking can be effectively avoided.
[0031] 5) In the height direction, the clamp positioning groove 4 is located between two adjacent studs 7, so as to ensure the balanced force during upsetting at each clamp positioning groove 4.
[0032] 6) The clamp positioning groove 4 is U-shaped. Compared with the original semi-circular shape, the depth is increased, which can facilitate the worker to place the clamp, is safer and more reliable, and improves the production efficiency.
[0033] It has been proved by practice that after using the improved positioning device:
[0034] (1) The length dimension deviation of the flange shaft forging is controlled within 1.5 mm, and the accuracy is improved;
[0035] (2) During each flange shaft forging batch, it is only necessary to adjust the front and back positions of the rear baffle 1 once or no adjustment is required, which improves the production efficiency.
[0036] The above embodiments illustrate the basic principles and features of the present utility model. However, the above only illustrates the preferred embodiments of the present utility model and is not limited by the said embodiments. Those of ordinary skill in the art, inspired by this patent, can also make many forms of deformation and improvement without departing from the purpose of the present utility model and the scope protected by the claims. These all fall within the protection scope of the present utility model. Therefore, the patent and protection scope of the present utility model shall be subject to the appended claims.
Claims
1. Improved rear positioning device for upset forging die of flange shaft, including a rear baffle arranged in the vertical direction, the rear baffle is located directly behind the concave die body of the upset forging die, and a number of clamp positioning grooves are evenly opened from top to bottom on the left side of the rear baffle, characterized in that: A number of length-adjustable connecting rods are evenly arranged between the rear baffle and the female die body from top to bottom. A lateral positioning rod is provided on the rear baffle, and the right end of the lateral positioning rod is press-connected to the left side of the upsetting press body.
2. The improved rear positioning device for the upset forging die of the flange shaft according to claim 1, characterized in that: Each length-adjustable connecting rod includes an internal thread sleeve and a stud that are both horizontally arranged in the front-rear direction. A groove is formed on the rear side surface of the female die body. The internal thread sleeve is installed in the groove and welded to the female die body by means of bevel grooving welding. A through hole is formed on the rear baffle, and the through hole and the groove are arranged at intervals in the up-down direction and the through hole is located on the right side of the groove. The right side of the stud passes through the through hole, and four fastening nuts are threadedly connected to the stud. Two of the fastening nuts are press-connected to the front side surface of the rear baffle, and the other two fastening nuts are press-connected to the rear side surface of the rear baffle.
3. The improved rear positioning device for the upset forging die of the flange shaft according to claim 1 or 2, characterized in that: The lateral positioning rod includes a number of screw rods that are evenly spaced from top to bottom. The same number of threaded holes as the number of screw rods are formed on the rear baffle. The screw rods extend into and are threadedly connected to the threaded holes, and the right ends of the screw rods are press-connected to the left side of the upsetting press body.