A small-size parts hot forming device and its production process

Abstract

The present invention discloses a small-size part hot forming device and a production process thereof, the device comprising: a first step forming mold, the first step forming mold comprising a convex mold 1 and a concave mold 1; a second step forming mold, the second step forming mold comprising a die base 1 and a concave mold 2. In the present invention, the forming process is generally divided into three steps, the first step is to bend a part by 90 degrees through a convex mold 1 and a concave mold, and the head is formed into the arc of the top of the concave mold 1, the second step is to bend the bent part by the cooperation of the convex mold 2 and the concave mold 2, the head is pressed into the arc of the top of the concave mold 2, and the remaining dimensions of the part are formed in place, the third step is to calibrate the head of the part to the requirements of the drawing through the convex mold 3, the side slider and the upper inclined guide column, the step-by-step forming is adopted to enhance the plasticity of the part, and the side push structure is adopted to reduce the damage to the mold and increase the service life of the convex mold.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece hot forming, and in particular to a small-size part hot forming device and a production process thereof. Background Art

[0002] Thermoforming is a special plastic processing method that processes thermoplastic sheets into various products. The sheet is clamped on a frame and heated to a softened state. Under the action of external force, it is pressed against the mold surface to obtain a shape similar to the mold surface. After cooling and shaping, it is trimmed to form a product.

[0003] For small size, poor molding process parts, such as fairing (such as attached Figure 5 ), the length of the part is 250mm, the height is 22mm, the inner cavity width is only 5.83mm, the part material is titanium alloy, and the part is formed by hot forming. The existing forming process is direct pressing of the upper and lower molds. The punch is easily crushed at high temperature (750°~800°), and the part cannot be formed well. Therefore, it is urgent to propose a corresponding device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and to propose a small-size parts hot forming device and a production process thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A small-size parts hot forming device, the device comprising:

[0007] The first step molding die comprises a male die and a female die;

[0008] The second step forming mold comprises a mold base 1 and a concave mold 2, wherein an insert is fixedly connected to the inner surface wall of the top of the concave mold 2, and a convex mold 2 is fixedly installed at the bottom of the mold base 1;

[0009] The third step forming mold comprises a mold base 2 and a concave mold 3, a convex mold 3 is fixedly installed on the top of the concave mold 3, a side slide block is arranged on the inner surface wall of the bottom of the mold base 2, and an inclined guide column is movably connected between the side slide block and the mold base 2;

[0010] A base fixedly connected to the first die, the second die and the third die at the same time, the top of the base is fixedly connected to a spacer, one side of the spacer is fixedly installed with a fixed frame and four groups of receiving blocks are arranged, three of the four groups of receiving blocks are fixedly connected to the first die, the first die base and the second die base through connecting rods;

[0011] The bottoms of the four groups of receiving blocks are elastically connected to the fixed frame through springs, and push rods are fixedly installed on the bottoms of the four groups of receiving blocks;

[0012] A sliding seat is horizontally penetrated through the inner surface wall of the fixed frame, and the sliding seat is elastically connected to the inner surface wall of the fixed frame through an elastic member, and a clamping portion for positioning the push rod is provided between the sliding seat and the push rod;

[0013] A support is fixedly installed on the top of the base, a hydraulic cylinder is fixedly installed on the top of the horizontal end of the support, and a pressing part for pressing four groups of receiving blocks in steps is provided at the output end of the hydraulic cylinder;

[0014] The inner wall of the spring (22) is in contact with the outer wall of the push rod (23);

[0015] The male die three (12) is fixedly connected to the female die three (14) via screws (13).

[0016] As a further description of the above technical solution:

[0017] The clamping part includes a combining block fixedly connected to four groups of push rods and three groups of clamping seats and one group of reset blocks fixedly installed on the outer wall of the sliding seat. The three groups of clamping seats and one group of reset blocks correspond to the four groups of combining blocks one by one.

[0018] As a further description of the above technical solution:

[0019] The pressing part includes a connecting frame which is transmission-connected to the output end of the hydraulic cylinder, a servo motor is fixedly mounted on the outer wall of the connecting frame, a screw is transmission-connected to the output end of the servo motor, the screw is horizontally inserted into the inner cavity of the connecting frame, a screw sleeve is screwed-connected on the outer wall of the screw sleeve, and a Z-shaped pressing rod is fixedly mounted on the outer wall of the screw sleeve.

[0020] As a further description of the above technical solution:

[0021] The connecting rod is slidably connected to the inner surface wall of the partition seat through a vertically arranged sliding groove.

[0022] As a further description of the above technical solution:

[0023] The connection frame and the outer surface wall of the servo motor are both fixedly mounted with a sliding sleeve, and the inner surface wall of the sliding sleeve is slidably connected with a polished rod fixedly connected to the top of the base.

[0024] As a further description of the above technical solution:

[0025] The process comprises the following steps:

[0026] Step 1: The first step is to bend a pair of parts of the male die and the female die by 90 degrees, so that the head is formed into the arc of the top of the female die;

[0027] Step 2: The second step is forming. The bent part is bent into shape by the cooperation of the second convex die and the second concave die. The head is pressed into the arc of the top of the second concave die, and the remaining dimensions of the part are formed in place.

[0028] Step three, the third step of forming, through the punch three, the side slider cooperates with the upper inclined guide pin to adjust the head of the part to the requirements of the drawing.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] 1. In the present invention, the molding process is generally divided into three steps. The first step is to bend a pair of parts by 90 degrees through a punch and a die, and to form the head into the curvature of the top of the die. The second step is to bend the bent part into shape through the cooperation of the punch and the die, and to press the head into the curvature of the top of the die, and at the same time, to form the remaining dimensions of the part in place. The third step is to adjust the head of the part to the requirements of the drawing through the punch and the side slider in cooperation with the upper inclined guide column. Step-by-step molding is adopted to enhance the plasticity of the part. At the same time, a side push structure is adopted to reduce damage to the mold and increase the service life of the punch.

[0031] 2. In the present invention, the servo motor drives the pressure rod to engage with the receiving block corresponding to the die base, and repeats the above operation until the engaging block corresponding to the die base is engaged with the clamping seat. At the same time, the engaging block corresponding to the punch is separated from the clamping seat and the punch and the die are opened, and so on, until the scattered processing of the parts is completed. There is no need to manually perform repeated combination and separation of multiple sets of molds, which reduces the working difficulty of the operator and improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the connection frame and the pressure rod in the present invention;

[0034] Figure 3 It is a structural schematic diagram of the card holder and the reset block in the present invention;

[0035] Figure 4 It is a structural schematic diagram of the sliding sleeve and the polished rod in the present invention;

[0036] Figure 5 It is a tooling diagram of the product in the present invention.

[0037] Legend:

[0038] 1. Base; 2. Spacer; 3. Punch 1; 4. Die 1; 5. Die base 1; 6. Die 2; 7. Punch 2; 8. Insert; 9. Die base 2; 10. Inclined guide column; 11. Side slide block; 12. Punch 3; 13. Screw; 14. Die 3; 15. Pillar; 16. Hydraulic cylinder; 17. Connecting frame; 18. Screw sleeve; 19. Screw; 20. Press rod; 21. Support block; 22. Spring; 23. Push rod; 24. Fixed frame; 25. Combination block; 26. Holder; 27. Sliding seat; 28. Elastic member; 29. ​​Reset block; 30. Sliding sleeve; 31. Polished rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1:

[0041] See also Figure 1-5 , a small-size parts hot forming device, the device includes:

[0042] The first step forming mold includes a male mold 3 and a female mold 4;

[0043] The second step forming mold includes a mold base 5 and a concave mold 6, the top inner surface wall of the concave mold 6 is fixedly connected with an insert 8, and the bottom of the mold base 5 is fixedly installed with a convex mold 7;

[0044] The third step is to form a mold. The third step is to form a mold including a mold base 2 9 and a die 3 14. A punch 3 12 is fixedly installed on the top of the die 3 14. A side slide 11 is provided on the inner wall of the bottom of the mold base 2 9. An inclined guide column 10 is movably connected between the side slide 11 and the mold base 2 9. The punch 3 12 is fixedly connected to the die 3 14 by a screw 13 to facilitate the disassembly and assembly of the punch 3 12.

[0045] A base 1 is fixedly connected to the concave die 1 4, the concave die 2 6 and the concave die 3 14 at the same time, a partition seat 2 is fixedly connected to the top of the base 1, a fixed frame 24 is fixedly installed on one side of the partition seat 2, and four groups of receiving blocks 21 are arranged, three of the four groups of receiving blocks 21 are respectively fixedly connected to the punch 1 3, the die base 1 5 and the die base 2 9 through connecting rods, and the connecting rod is slidably connected to the inner surface wall of the partition seat 2 through a vertically arranged slide groove, which ensures the stability of the movement of the punch 1 3, the die base 1 5 and the die base 2 9;

[0046] The bottoms of the four groups of receiving blocks 21 are elastically connected to the fixed frame 24 through springs 22. Push rods 23 are fixedly installed at the bottoms of the four groups of receiving blocks 21. The inner surface wall of the spring 22 fits the outer surface wall of the push rod 23 to ensure the stability of the movement of the receiving blocks 21.

[0047] A slide seat 27 is horizontally penetrated through the inner surface wall of the fixed frame 24. The slide seat 27 is elastically connected to the inner surface wall of the fixed frame 24 through an elastic member 28. A clamping portion for positioning the push rod 23 is provided between the slide seat 27 and the push rod 23.

[0048] A support 15 is fixedly installed on the top of the base 1, and a hydraulic cylinder 16 is fixedly installed on the top of the horizontal end of the support 15. The output end of the hydraulic cylinder 16 is provided with a pressing part for pressing four groups of receiving blocks 21 in steps.

[0049] The engaging portion includes a combining block 25 fixedly connected to four groups of push rods 23 and three groups of clamping seats 26 and one group of reset blocks 29 fixedly installed on the outer wall of the slide seat 27. The three groups of clamping seats 26 and one group of reset blocks 29 correspond to the four groups of combining blocks 25 one by one. The extra group of receiving blocks 21, spring 22, push rod 23 and reset blocks 29 form a reset mechanism, which can separate the three groups of molds at the same time.

[0050] The pressing part includes a connecting frame 17 which is transmission-connected to the output end of the hydraulic cylinder 16, a servo motor is fixedly installed on the outer wall of the connecting frame 17, a screw 19 is transmission-connected to the output end of the servo motor, the screw 19 is horizontally penetrated into the inner cavity of the connecting frame 17, a screw sleeve 18 is screwed and connected to the outer wall of the screw 19, a Z-shaped pressing rod 20 is fixedly installed on the outer wall of the screw sleeve 18, a sliding sleeve 30 is fixedly installed on the outer wall of the connecting frame 17 and the servo motor, and a light rod 31 which is fixedly connected to the top of the base 1 on the inner wall of the sliding sleeve 30 is slidably connected to ensure the smooth movement of the connecting frame 17.

[0051] After placing the part on the die 4, the servo motor drives the screw 19 to rotate, and the screw 19 drives the pressure rod 20 to move to the receiving block 21 corresponding to the punch 3 by screwing with the screw sleeve 18. The hydraulic cylinder 16 pushes the connecting frame 17, and the connecting frame 17 moves downward. The receiving block 21 drives the push rod 23 to move downward and compresses the spring 22. The combination block 25 at the bottom of the push rod 23 first slides with the inclined surface of the card seat 26, and the card seat 26 drives the slide seat 27 to slide horizontally until the combination block 25 falls into the notch of the card seat 26. At this time, the elastic member 2 8 drives the slide 27 to reset, so that the combining block 25 and the clamping seat 26 are stably engaged, and the connecting frame 17 and the pressure rod 20 are reset following the hydraulic cylinder 16 at this time, and the punch 3 and the die 4 are combined at this time to complete the first step of processing of the part, and then the servo motor drives the pressure rod 20 to be combined to the top of the receiving block 21 corresponding to the die base 5, and repeats the above operation until the combining block 25 corresponding to the die base 5 is combined with the clamping seat 26. At the same time, the combining block 25 corresponding to the punch 3 automatically detaches from the clamping seat 26 and the spring 22 makes the punch 3 and the die 4 open, and so on, until the three-step processing of the part is completed, without the need for manual repeated combination and separation of multiple sets of molds, which reduces the difficulty of the operator's work and improves the processing efficiency.

[0052] A production process for hot forming small-size parts, the process comprising the following steps:

[0053] Step 1: The first step is forming. The part is bent 90 degrees by the male die 3 and the female die 4, and the head is formed into the curvature of the top of the female die 4;

[0054] Step 2: The second step of forming is to bend the bent part into shape by the cooperation of the second convex die 7 and the second concave die 6, and the head is pressed into the arc of the top of the second concave die 6, while the remaining dimensions of the part are formed in place;

[0055] Step 3: The third step of forming is to adjust the head of the part to the requirements of the drawing through the punch 3 12, the side slide block 11 and the upper inclined guide column 10.

[0056] The molding process is generally divided into three steps. The first step is to bend the part 90° through the punch 1 3 and the die 1 4, and form the head into the curvature of the top of the die 1 4. The second step is to bend the bent part into shape through the cooperation of the punch 2 7 and the die 2 6, and press the head into the curvature of the top of the die 2 6, while making the remaining dimensions of the part in place. The third step is to adjust the head of the part to the requirements of the drawing through the punch 3 12, the side slide block 11 and the upper inclined guide column 10. Step-by-step molding is adopted to enhance the plasticity of the part. At the same time, the side push structure is adopted to reduce the damage to the mold and increase the service life of the punch.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A small-size parts hot forming device, characterized in that: The device comprises: A first step molding die, the first step molding die comprising a male die (3) and a female die (4); The second step molding die comprises a die base 1 (5) and a concave die 2 (6), an insert (8) is fixedly connected to the inner surface wall of the top of the concave die 2 (6), and a convex die 2 (7) is fixedly installed on the bottom of the die base 1 (5); A third step forming mold, the third step forming mold comprising a mold base 2 (9) and a concave mold 3 (14), a convex mold 3 (12) being fixedly mounted on the top of the concave mold 3 (14), a side slide block (11) being arranged on the inner surface wall of the bottom of the mold base 2 (9), and an inclined guide column (10) being movably connected between the side slide block (11) and the mold base 2 (9); A base (1) fixedly connected to the first die (4), the second die (6) and the third die (14), the top of the base (1) being fixedly connected to a spacer (2), one side of the spacer (2) being fixedly mounted with a fixed frame (24) and provided with four groups of receiving blocks (21), three of the four groups of receiving blocks (21) being fixedly connected to the first die (3), the first die base (5) and the second die base (9) respectively through connecting rods; The bottoms of the four groups of receiving blocks (21) are elastically connected to the fixed frame (24) via springs (22), and push rods (23) are fixedly installed on the bottoms of the four groups of receiving blocks (21); A sliding seat (27) is horizontally penetrated through the inner surface wall of the fixed frame (24); the sliding seat (27) is elastically connected to the inner surface wall of the fixed frame (24) via an elastic member (28); and a clamping portion for positioning the push rod (23) is provided between the sliding seat (27) and the push rod (23); A support (15) is fixedly mounted on the top of the base (1), a hydraulic cylinder (16) is fixedly mounted on the top of the horizontal end of the support (15), and a pressing portion for pressing four groups of receiving blocks (21) in steps is provided at the output end of the hydraulic cylinder (16); The inner wall of the spring (22) is in contact with the outer wall of the push rod (23); The male die three (12) is fixedly connected to the female die three (14) by means of screws (13); The engaging portion comprises a coupling block (25) fixedly connected to the four groups of push rods (23) and three groups of clamping seats (26) and a group of reset blocks (29) fixedly mounted on the outer wall of the slide seat (27), wherein the three groups of clamping seats (26) and the group of reset blocks (29) correspond to the four groups of coupling blocks (25) respectively. The pressing part comprises a connecting frame (17) drivingly connected to the output end of the hydraulic cylinder (16); a servo motor is fixedly mounted on the outer wall of the connecting frame (17); the output end of the servo motor is drivingly connected to a screw rod (19); the screw rod (19) is horizontally inserted into the inner cavity of the connecting frame (17); a screw sleeve (18) is screwedly connected to the outer wall of the screw sleeve (18); and a Z-shaped pressing rod (20) is fixedly mounted on the outer wall of the screw sleeve (18).

2. A small-size parts hot forming device according to claim 1, characterized in that: The connecting rod is slidably connected to the inner surface wall of the partition seat (2) via a vertically arranged sliding groove.

3. A small-size parts hot forming device according to claim 2, characterized in that: The connection frame (17) and the outer surface wall of the servo motor are both fixedly mounted with a sliding sleeve (30), and the inner surface wall of the sliding sleeve (30) is slidably connected to a polished rod (31) fixedly connected to the top of the base (1).

4. A production process for a small-size parts hot forming device according to claim 3, characterized in that: The process comprises the following steps: Step 1: The first step is forming. The part is bent 90 degrees by using the male die 1 (3) and the female die 1 (4) to form the head into the arc of the top of the female die 1 (4); Step 2: The second step of forming is to bend the bent part into shape by cooperating with the second male die (7) and the second female die (6), and press the head into the arc of the top of the second female die (6), while making the remaining dimensions of the part in place; Step 3: The third step of forming is to adjust the head of the part to the requirements of the drawing through the punch 3 (12), the side slide block (11) and the upper inclined guide column (10).

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