Equipment for expanding convex hulls on surface of oil storage cylinder of shock absorber

Abstract

The utility model discloses a device for a surface expansion convex hull of an oil storage cylinder of a shock absorber, which comprises a rack, the rack comprises a guide pillar, and the upper end and the lower end of the guide pillar are respectively provided with a mounting plate and a bottom plate; a pressing device is arranged on the mounting plate, and correspondingly, an expansion convex hull die is arranged on the bottom plate; after the downward pressing device moves downwards, the downward pressing device can act on the convex hull expanding die; therefore, the convex hull expansion work of the oil storage cylinder is completed. After the equipment is processed, the straightness and the coaxiality of the liquid storage cylinder can be effectively kept, the later assembly is facilitated, the inner wall is smooth, and the surface is attractive; semi-automatic production and integrated forming can be achieved in the machining process, batch production can be achieved, and the production efficiency is improved; meanwhile, the convex hulls on the oil storage cylinder are machined in a cold expansion mode, potential safety hazards existing in the production process are reduced, in addition, the equipment is easy to operate, an operator can work after being simply trained, the structure is simple, manufacturing is convenient, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to mechanical equipment for producing shock absorbers, in particular to equipment for bulging the surface of an oil storage cylinder of a shock absorber. Background Art

[0002] The oil reservoir of the shock absorber is an important part of the shock absorber, which is used to store the oil required for the shock absorber to work. In the automobile suspension system, the spring and shock absorber work together. In order to support the spring, the oil reservoir needs to be bulged.

[0003] The traditional process of bulging the oil storage cylinder uses a thermoforming process. The material of the oil storage cylinder is heated to a certain temperature and then pressurized with a mold to cause plastic deformation, thus forming the bulge structure. However, the thermoforming process has the following disadvantages:

[0004] 1) Poor processing quality. The hot forming process needs to be carried out at high temperature, which may cause changes in the internal microstructure of the material, thereby affecting its mechanical properties and stability. Such changes may cause the oil storage cylinder to bend or twist after forming, thereby affecting its coaxiality and straightness. In addition, due to the fluidity and thermal expansion effect of the material at high temperature, the oil storage cylinder may have problems such as dimensional deviation and shape distortion during the forming process, making its surface relatively rough.

[0005] 2) The thermoforming process requires a series of steps, which is time-consuming and labor-intensive, and has low efficiency. At the same time, during the thermoforming process, oxide scale will be generated on the surface of the oil storage cylinder, and removing this oxide scale also requires a lot of effort.

[0006] 3) Since it is a thermoforming processing method, a higher processing temperature is required during processing, which poses a greater risk.

[0007] 4) The thermoforming processing method has high requirements for molds and needs to be customized according to different shock absorber specifications, which is costly. At the same time, professional workers need to be trained during operation, which results in high labor costs. Utility Model Content

[0008] To overcome the shortcomings of the prior art, the present invention provides a device for forming bulges on the surface of a shock absorber oil reservoir. Using the device to process the oil reservoir effectively maintains the reservoir's straightness and coaxiality, facilitating later assembly. The inner wall is smooth, ensuring a beautiful surface. The processing can be semi-automated, improving production efficiency. Furthermore, the device processes bulges on the workpiece through cold expansion, reducing potential safety hazards during production. Furthermore, the device is easy to operate, requiring minimal operator training. It also features a simple structure, is easy to manufacture, and reduces production costs.

[0009] The technical solution of the utility model is as follows:

[0010] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. There is an automatic centering slide; the workpiece mounting column is fixed on the automatic centering slide; the workpiece mounting column is used to mount the workpiece, and the upper end of the workpiece mounting column is provided with a pressure rod docking hole; the outer mold includes an A outer module and a B outer module, and the A outer module and the B outer module are arranged on a clamping device, and the A outer module and the B outer module can be docked under the action of the clamping device; the inner mold is arranged at the upper end of the workpiece mounting column, and the inner mold includes a group of inner mold flaps arranged along the circumference, and the inner mold flaps are tied by elastic O-rings, and the center of the inner mold has an inner mold hole for docking with the bulging pressure rod; the outer surface of the inner mold flap is provided with a protrusion, and correspondingly, the inner surface of the A outer module and the B outer module is provided with a groove. When the bulging pressure rod is pressed down and inserted into the center of the inner mold, the inner mold flap is squeezed outward and the protrusion forms a bulge on the surface of the workpiece.

[0011] Compared with the prior art, the device for expanding the surface of the oil storage cylinder of the shock absorber of the present invention processes the bulge on the oil storage cylinder by cold expansion. The processing process can realize semi-automatic production and one-piece molding, which can realize mass production. At the same time, it effectively ensures the straightness and coaxiality of the liquid storage cylinder and is simple to operate. The present invention has achieved significant progress, as follows:

[0012] 1) High processing quality: The equipment processing of this utility model uses the cold expansion processing method, which can effectively maintain the straightness and coaxiality of the liquid storage cylinder, facilitating the later assembly; at the same time, it does not damage the smoothness of the cylinder body, ensuring the beautiful surface;

[0013] 2) High processing efficiency: During the processing, the utility model can make the workpiece processing more precise through the automatic centering slide, realize semi-automatic production, fast processing speed, batch production, one-piece molding, avoid multiple rework and trimming, and improve processing efficiency;

[0014] 3) High safety: The utility model utilizes equipment for cold expansion, and the expansion and bulging of the oil storage cylinder can be completed through the cooperation of the inner mold and the outer mold. Compared with the previous hot forming, high temperature processing is not required, which reduces safety hazards.

[0015] 4) Low cost, simple processing equipment, easy manufacturing, low production cost. At the same time, no professional processing workers are required, and operators can take up their posts after simple training, saving production costs.

[0016] Furthermore, in the aforementioned device for bulging the surface of the shock absorber oil storage cylinder, the clamping device is arranged on the base plate, and the clamping device includes a clamping block A, a clamping block B, and a sliding column assembly. The clamping block A is fixedly connected to the sliding column assembly, and the clamping block B is slidably connected to the sliding column assembly and can be driven by a clamping cylinder; the A outer module is fixedly connected to the A clamping block, and the B clamping block is fixedly connected to the B outer module; the clamping cylinder can drive the B clamping block to move so that the A outer module and the B outer module are docked. Furthermore, the sliding column assembly includes a pair of sliding columns, the A clamping block is mounted on the sliding column and abuts against the step surface on the sliding column to form a limit, and the sliding column is provided with a positioning nut to fix the A clamping block; the B clamping block is mounted on the sliding column and forms a cylindrical secondary structure with the sliding column. The use of this structure has the advantage of being easy to implement.

[0017] Furthermore, in the aforementioned device for reducing bulges on the surface of a shock absorber oil reservoir, the workpiece mounting post includes a positioning block disposed at its top end, the upper end surface of which abuts against the inner die. The positioning block reduces wear on the workpiece mounting post caused by repeated extrusions of the inner die, and the negative impact of wear on the machining process can be avoided by replacing the positioning block.

[0018] Furthermore, in the aforementioned device for increasing the bulge on the surface of a shock absorber oil reservoir, the workpiece mounting column sleeve is provided with a workpiece stop sleeve, which is threadedly connected to the workpiece mounting column. This threaded connection allows the workpiece stop sleeve to be adjusted according to the desired bulge position on the workpiece, and can also accommodate workpieces of varying lengths, thus broadening its applicability.

[0019] Furthermore, in the aforementioned device for bulging the surface of the oil storage cylinder of a shock absorber, the number of the inner mold halves may be 6-18.

[0020] Furthermore, in the aforementioned device for removing bulges on the surface of a shock absorber oil reservoir, the fixing plate is provided with a screw, which is connected to the bottom end of the workpiece mounting column or the automatic centering slide via a spring. After processing is completed, the outer module B is withdrawn by the cylinder, and the spring pulls the automatic centering slide back to its original position, allowing direct removal of the workpiece.

[0021] Furthermore, in the aforementioned device for bulging the surface of the oil storage cylinder of the shock absorber, the inner mold hole is conical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a device for forming a bulge on the surface of an oil storage cylinder of a shock absorber according to the present invention;

[0023] Figure 2 This is a structural diagram of a downward pressing device in a device for reducing the bulge on the surface of an oil storage cylinder of a shock absorber according to the utility model;

[0024] Figure 3 This is a structural diagram of the outer mold and the inner mold in the device for bulging the surface of the oil storage cylinder of the shock absorber according to the utility model;

[0025] Figure 4 This is a structural diagram of the inner mold in the device for forming a bulge on the surface of the oil storage cylinder of a shock absorber according to the utility model;

[0026] Figure 5 This is a structural diagram of the positioning device and the inner mold in the device for bulging the surface of the oil storage cylinder of the shock absorber according to the utility model;

[0027] Figure 6 This is a cross-sectional view of the positioning device and inner mold in the device for bulging the surface of the oil storage cylinder of the shock absorber according to the utility model;

[0028] Figure 7 This is a structural diagram of a sliding column assembly in a device for bulging the surface of an oil storage cylinder of a shock absorber according to the present invention;

[0029] Figure 8 The utility model is a schematic diagram of a workpiece after being processed by the device for bulging and protruding the surface of the oil storage cylinder of the shock absorber.

[0030] The figures are marked as follows: 1-frame; 101-guide column; 102-mounting plate; 103-base plate; 2-hydraulic cylinder; 3-movable plate; 4-expansion bulge pressure rod; 5-workpiece mounting column; 501-positioning pad; 6-mounting frame; 601-fixed plate; 7-A outer module; 8-B outer module; 9-inner mold flap; 901-protrusion; 10-A clamping block; 11-B clamping block; 12-slide column assembly; 1201-slide column; 1202-positioning nut; 13-clamping cylinder; 14-automatic centering slide; 15-workpiece limit sleeve; 16-bulge; 17-spring; 18-screw. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to be the basis of the present invention.

[0032] Example (see Figure 1-8 ):

[0033] The device for forming a bulge on the surface of a shock absorber's oil reservoir cylinder comprises a frame 1; the frame 1 includes a guide post 101 (in operation, the frame 1 is mounted on a workbench). Mounting plates 102 and a base plate 103 are provided at the top and bottom ends of the guide post 101, respectively. A downward pressure device is provided on the mounting plate 102, and a corresponding bulge die is provided on the base plate 103. During operation, the downward pressure device and the bulge die cooperate to deform the workpiece material, forming a bulge 16.

[0034] The pressing device includes a hydraulic cylinder 2, a movable plate 3, and an expansion and bulging pressure rod 4; the hydraulic cylinder 2 is fixed on the mounting plate 102, the movable plate 3 is slidably fitted with the guide column 101, the movable plate 3 is connected to the output shaft of the hydraulic cylinder 2, and the movable plate 3 can be controlled to move up and down by the hydraulic cylinder 2; the expansion and bulging pressure rod 4 is fixed to the lower end of the movable plate 3, and the lower part of the expansion and bulging pressure rod 4 is conical.

[0035] The bulging mold includes a positioning device, a clamping device, an outer mold and an inner mold; the positioning device includes a workpiece mounting column 5 and a mounting frame 6, and the mounting frame 6 is fixed to the bottom of the base plate 103; the mounting frame 6 includes a fixed plate 601, and an automatic centering slide 14 is provided on the fixed plate; the workpiece mounting column 5 is fixed on the automatic centering slide 14; the workpiece mounting column 5 is used to mount the workpiece, and the upper end of the workpiece mounting column 5 is provided with a pressure rod docking hole; the outer mold includes an A outer module 7 and a B outer module 8, and the A outer module 7 and the B outer module 8 are arranged on the clamping device, and the A outer module 7 and the B outer module 8 can be clamped. The inner mold is provided at the upper end of the workpiece mounting column 5, and the inner mold comprises a group of inner mold flaps 9 arranged along the circumference (in the embodiment, the number of inner mold flaps 9 is 12), and the inner mold flaps 9 are fastened by elastic O-rings, and the center of the inner mold has an inner mold hole for docking with the bulging pressure rod 4, and the inner mold hole is conical; the outer surface of the inner mold flap 9 is provided with a protrusion 901, and correspondingly, the inner surfaces of the A outer module 7 and the B outer module 8 are provided with grooves. When the bulging pressure rod 4 is pressed down and inserted into the center of the inner mold, the inner mold flap 9 is squeezed outward and opened, and the protrusion 901 forms a bulge 16 on the surface of the workpiece.

[0036] like Figure 1 As shown, the clamping device is arranged on the base plate 103, and the clamping device includes an A clamping block 10, a B clamping block 11 and a sliding column assembly 12. The A clamping block 10 is fixedly connected to the sliding column assembly 12, and the B clamping block 11 is slidingly connected to the sliding column assembly 12 and can be driven by a clamping cylinder 13; the A external module 7 is fixedly connected to the A clamping block 10, and the B clamping block 11 is fixedly connected to the B external module 8; the clamping cylinder 13 can drive the B clamping block 11 to move, so that the A external module 7 and the B external module 8 are docked.

[0037] like Figure 7 As shown, the slide assembly 12 includes a pair of slides 1201. The A clamping block 10 is mounted on the slides 1201 and abuts against the stepped surface on the slides 1201 to form a stop. The slides 1201 are also provided with a positioning nut 1202 to secure the A clamping block 10. The B clamping block 11 is mounted on the slides 1201 to form a cylindrical secondary structure with the slides 1201. This structure has the advantage of being easy to implement.

[0038] like Figure 5 As shown, the workpiece mounting post 5 includes a positioning pad 501 at its top end, the upper end of which abuts against the inner die. The positioning pad 501 can reduce wear on the workpiece mounting post 5 after repeated extrusions of the inner die, and the negative impact of wear on the processing can be avoided by replacing the positioning pad 501.

[0039] The workpiece mounting column 5 is provided with a workpiece limiting sleeve 15, which is connected to the workpiece mounting column 5 via a thread. The threaded connection allows the workpiece limiting sleeve 15 to be adjusted according to the position of the workpiece required to be bulged, thereby adapting to the processing requirements of different workpieces.

[0040] like Figure 5 As shown, the fixing plate 601 is provided with a screw 18, which is connected to the bottom end of the workpiece mounting post 5 or the automatic centering slide 14 via a spring 17. After processing is completed, the B outer module 8 is withdrawn under the drive of the cylinder 13, and the spring 17 pulls the automatic centering slide 14 back to its original position, allowing direct removal of the workpiece. (If spring 17 were not present, the workpiece, along with the workpiece mounting post 15, would need to be manually pulled away from the A outer module 7. Otherwise, the workpiece would be unable to be removed because the bump 16 on the workpiece would be located in the groove on the inner surface of the A outer module 7.)

[0041] The working process of this utility model is as follows:

[0042] S1: The workpiece is placed in the workpiece mounting column 5, and the clamping cylinder 13 drives the B clamping block 11 to move, so that the A outer module 7 and the B outer module 8 cooperate to form a docking state (during the movement of the B clamping block 11, it will push the workpiece mounting column 5, so that after the A outer module 7 and the B outer module 8 are docked, the workpiece mounting column 5 is automatically centered).

[0043] S2: The hydraulic cylinder 2 controls the bulging pressure rod 4 to press down. The bulging pressure rod 4 is inserted into the inner die hole, so that the inner die flap 9 can be squeezed and opened outward. Through the cooperation between the protrusion 901 and the outer membrane device, a bulge 16 is formed on the workpiece.

[0044] S3: After the bulging is completed, the bulging pressure rod 4 moves upward, the B outer module 8 is separated from the A outer module 7, and the spring 17 pulls the automatic centering slide 14 to reset it, and the workpiece is taken out to complete the processing.

[0045] The above general description of the utility model and the description of its specific embodiments involved in this application should not be construed as limiting the technical solutions of the utility model. Based on the disclosure of this application, those skilled in the art may, without violating the constituent elements of the utility model involved, add to, subtract from, or combine the disclosed technical features in the above general description and / or specific embodiments (including examples) to form other technical solutions within the scope of protection of this application.

Claims

1. A device for bulging the surface of the oil storage cylinder of a shock absorber, characterized by: The machine frame (1) comprises a guide column (101), and the upper and lower ends of the guide column (101) are respectively provided with a mounting plate (102) and a bottom plate (103); the mounting plate (102) is provided with a pressing device, and correspondingly, the bottom plate (103) is provided with an expansion mold; The downward pressing device comprises a hydraulic cylinder (2), a movable plate (3), and an expansion and bulging pressure rod (4); the hydraulic cylinder (2) is fixed on the mounting plate (102), the movable plate (3) is slidably matched with the guide column (101), the movable plate (3) is connected to the output shaft of the hydraulic cylinder (2), and the movable plate (3) can be controlled to move up and down by the hydraulic cylinder (2); the expansion and bulging pressure rod (4) is fixed to the lower end of the movable plate (3), and the lower part of the expansion and bulging pressure rod (4) is conical; The bulging mold includes a positioning device, a clamping device, an outer mold and an inner mold; the positioning device includes a workpiece mounting column (5) and a mounting frame (6), and the mounting frame (6) is fixed to the bottom of the base plate (103); the mounting frame (6) includes a fixed plate (601), and the fixed plate is provided with an automatic centering slide (14); the workpiece mounting column (5) is fixed on the automatic centering slide (14); the workpiece mounting column (5) is used to mount the workpiece, and the upper end of the workpiece mounting column (5) is provided with a pressure rod docking hole; the outer mold includes an A outer module (7) and a B outer module (8), and the A outer module (7) and the B outer module (8) are provided on the clamping device, and the A The outer module (7) and the B outer module (8) can be docked under the action of the clamping device; the inner mold is arranged at the upper end of the workpiece mounting column (5), and the inner mold includes a group of inner mold flaps (9) arranged along the circumference, the inner mold flaps (9) are tied by elastic O-rings, and the center of the inner mold has an inner mold hole for docking with the bulging pressure rod (4); the outer surface of the inner mold flap (9) is provided with a protrusion (901), and correspondingly, the inner surface of the A outer module (7) and the B outer module (8) is provided with a groove, when the bulging pressure rod (4) is pressed down and inserted into the center of the inner mold, the inner mold flap (9) is squeezed outward and the protrusion (901) forms a bulge (16) on the surface of the workpiece.

2. The device for bulging the surface of the oil storage cylinder of a shock absorber according to claim 1, characterized in that: The clamping device is arranged on the base plate (103), and the clamping device includes an A clamping block (10), a B clamping block (11) and a sliding column assembly (12). The A clamping block (10) is fixedly connected to the sliding column assembly (12), and the B clamping block (11) is slidably connected to the sliding column assembly (12) and can be driven by a clamping cylinder (13); the A outer module (7) is fixedly connected to the A clamping block (10), and the B clamping block (11) is fixedly connected to the B outer module (8); the clamping cylinder (13) can drive the B clamping block (11) to move, so that the A outer module (7) and the B outer module (8) are docked.

3. The device for bulging the surface of the oil storage cylinder of a shock absorber according to claim 2, characterized in that: The sliding column assembly (12) includes sliding columns (1201) arranged in pairs, the A clamping block (10) is sleeved on the sliding column (1201) and abuts against the step surface on the sliding column (1201) to form a limit, and at the same time, the sliding column (1201) is provided with a positioning nut (1202) to fix the A clamping block (10); the B clamping block (11) is sleeved on the sliding column (1201) and forms a cylindrical substructure with the sliding column (1201).

4. The device for bulging the surface of the oil storage cylinder of a shock absorber according to claim 1, characterized in that: The workpiece mounting column (5) comprises a positioning pad (501) provided at the top end thereof, and the upper end surface of the positioning pad (501) abuts against the inner mold.

5. The device for bulging the surface of the oil storage cylinder of a shock absorber according to claim 1, characterized in that: A workpiece limiting sleeve (15) is sleeved on the workpiece mounting column (5), and the workpiece limiting sleeve (15) and the workpiece mounting column (5) are connected to each other via threads.

6. The device for bulging the surface of the oil storage cylinder of a shock absorber according to claim 1, characterized in that: The number of the inner mold flaps (9) is 6-18.

7. The device for bulging the surface of the oil storage cylinder of a shock absorber according to claim 1, characterized in that: The fixing plate (601) is provided with a screw rod (18), and the screw rod (18) is connected to the bottom end of the workpiece mounting column (5) or the automatic centering slide (14) through a spring (17).

8. The device for bulging the surface of the oil storage cylinder of a shock absorber according to claim 1, characterized in that: The inner die hole is tapered.

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