Nonlinear spiral spring punching device

Abstract

The utility model discloses a nonlinear spiral spring punching device which comprises a fixed bottom plate, a vertical rod installed on the fixed bottom plate, an inner stud installed on the top of the vertical rod, a supporting plate sleeved on the inner stud, a drill jig installed on the top of the supporting plate, and a spiral spring positioning hole and a drill bushing installation hole arranged on the outer wall of the drill jig. And drill bushings are mounted in the drill bushing mounting holes. According to the punching device, used raw materials are easy to purchase, the price is low, and the machining cost is low; the spiral spring can be quickly clamped, positioning is accurate, drilling of multiple hole positions can be completed through one-time clamping, the production efficiency is high, the labor cost is low, the product quality consistency is good, and the requirement for batch production can be met.

Description

Technical Field

[0001] The utility model relates to the field of machining, specifically to a non-linear spiral spring punching device in this field. Background Technique

[0002] Some in-vehicle electronic devices need to be installed on a lifting rod for use. During operation, their power cables and signal cables need to be lifted and lowered simultaneously with the device. Currently, the cables are usually tied to a spiral spring to ensure that the cables do not get disordered during lifting and lowering. To achieve the structural and electrical functions, holes need to be punched in the spiral spring to facilitate subsequent processes such as welding and electrical assembly. The spiral spring is wound from spring steel with relatively high strength, and has a large winding ratio and mass, making it difficult to clamp and position. If special machining methods such as electric discharge machining are used, although the accuracy is high, it is not limited by the strength and hardness of the workpiece material and is a non-contact machining method, but compared with mechanical machining methods, the efficiency is low, the cost is high, and it is not suitable for mass production. When using conventional mechanical machining methods, with existing machining equipment, multiple clamping and alignment operations are required, and most of the clamping parts of conventional fixtures are flat surfaces, making it difficult to firmly clamp the spiral spring. During clamping, the spiral spring is prone to plastic deformation, which affects subsequent use, resulting in product quality problems and economic losses.

[0003] The utility model patent with the patent number CN 215237191U discloses a special-shaped spring punching structure, which drives a rotating shaft to rotate forward and backward by a servo motor, driving a punching column to punch holes in the spring. The disadvantage is that it can only punch holes at one position of the spring. If holes need to be punched at multiple positions, it is necessary to re-clamp and fix, resulting in low production efficiency. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a non-linear spiral spring punching device, which can avoid plastic deformation caused by clamping in actual production, ensure machining accuracy, improve production efficiency, and reduce production costs.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A non-linear spiral spring punching device, the improvement lies in: including a fixed bottom plate, a vertical rod is installed on the fixed bottom plate, an internal screw column is installed at the top of the vertical rod, a support plate is sleeved on the internal screw column, a drill die is installed at the top of the support plate, spiral spring positioning holes and drill sleeve installation holes are arranged on the outer wall of the drill die, and a drill sleeve is installed in the drill sleeve installation hole.

[0007] Further, more than three reinforcing ribs are evenly distributed between the bottom of the vertical rod and the fixed bottom plate.

[0008] Further, the inner stud is welded to the top of the vertical rod. After the support plate is sleeved on the inner stud, the support plate is pressed onto the vertical rod by tightening the bolt installed on the inner stud.

[0009] Further, more than three drill die installation positions are evenly distributed circumferentially on the top of the support plate.

[0010] Further, the drill die includes an upper die and a lower die. The upper die and the lower die are fixed by bolts, and the lower die is fixed to the support plate by bolts.

[0011] Further, an arc U-shaped groove corresponding to the outer dimension of the helical spring is machined on the side of the upper die, and an arc step is machined on the side of the lower die adjacent to the arc U-shaped groove. The arc U-shaped groove and the arc step cooperate to form a positioning hole for the helical spring.

[0012] Further, there are three drill bushing installation holes, and the drill bushings are embedded in the drill bushing installation holes by interference fit.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The punching device disclosed by the present utility model uses raw materials that are easy to purchase, have a low price, and low processing costs; it can quickly clamp the helical spring, with accurate positioning. Multiple hole positions can be drilled in one clamping, with high production efficiency, low labor costs, good consistency of product quality, and can meet the requirements of mass production; the drill die has high wear resistance, long service life, good punching guiding performance, can meet the processing accuracy requirements, and rarely has the problem of tool breakage. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the punching device disclosed in Embodiment 1 of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the drill die in the punching device disclosed in Embodiment 1 of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the non-linear helical spring to be punched;

[0018] Figure 4 is a front view of the punching device disclosed in Embodiment 1 of the present utility model after clamping the helical spring;

[0019] Figure 5 is a top view of the punching device disclosed in Embodiment 1 of the present utility model after clamping the helical spring.

[0020] Reference Signs:

[0021] 1 - Support plate, 2 - Inner stud, 3 - Vertical rod, 4 - Reinforcing rib, 5 - Fixed base plate, 6 - Upper die, 61 - Arc U-shaped groove, 7 - Lower die, 71 - Arc step, 8 - Drill bushing, 9 - Drill bushing, 10 - Drill bushing. Specific implementation manner

[0022] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] Embodiment 1, as Figure 1 shown, this embodiment discloses a non-linear spiral spring punching device, including a fixed base plate 5, a vertical rod 3 is installed on the fixed base plate, and three reinforcing ribs 4 are evenly distributed between the bottom of the vertical rod and the fixed base plate. An inner stud 2 is welded to the top of the vertical rod. After the support plate 1 is sleeved on the inner stud, the support plate is pressed onto the vertical rod by tightening the bolt installed on the inner stud, so as to quickly disassemble and replace support plates of different sizes to meet the processing requirements of workpieces of different sizes. A drill die is installed on the top of the support plate, and a spiral spring positioning hole and three drill bushing installation holes are provided on the outer wall of the drill die. Three drill bushings 8, 9, and 10 are respectively embedded into the above three drill bushing installation holes by interference fit.

[0024] In this embodiment, four drill die installation positions are evenly distributed circumferentially on the top of the support plate for circumferential multi-position punching. As Figure 2 shown, the drill die includes an upper die 6 and a lower die 7. The upper die and the lower die are fixed by bolts. The lower die is tapped with threaded holes and fixed to the support plate by bolts. An arc U-shaped groove 61 corresponding to the outer shape size of the spiral spring is machined on the side of the upper die, and an arc step 71 is machined on the side of the lower die adjacent to the arc U-shaped groove. The arc U-shaped groove and the arc step cooperate to form a spiral spring positioning hole, with quick positioning and firm clamping.

[0025] The process of clamping the spiral spring shown in Figure 3 using the punching device disclosed in this embodiment is as follows: Fix the fixed base plate 5 on the platform through a pressing plate, bolts, etc. Vertically sleeve the spiral spring onto the vertical rod 3 from top to bottom. After the support plate 1 is pressed onto the vertical rod, place any part of the spiral spring that needs to be punched from the head on the support plate, and screw-fix the lower die 7 to the support plate. Clamp the part of the spiral spring that needs to be punched into the arc U-shaped groove 61 of the upper die 6 and press it against the arc step 71 of the lower die 7. After screwing and fixing the upper and lower dies, the arc U-shaped groove 61 and the arc step 71 cooperate to form a spiral spring positioning hole to quickly clamp and position the spiral spring. At this time, the holes to be processed on the spiral spring correspond one by one to the drill bushings on the drill die, and the punching process can be carried out. Figure 4It is the front view of the punching device after clamping the spiral spring; Figure 5 It is the top view of the punching device after clamping the spiral spring.

[0026] The size of the drill bushing is determined according to the actual requirements of the workpiece. During the punching process, the drill bushing plays a role in guiding and positioning. The electric drill can be directly used to drill in the drill bushing. In this way, the vibration amplitude of the drill bit is small, which not only ensures the position dimension accuracy of the hole, but also avoids the fracture of the drill bit due to vibration.

[0027] The drill bushing is made of bearing steel, with high strength, hardness and good wear resistance. The other parts of the punching device are made of medium carbon steel, and the raw materials are easy to purchase and have a low price. The whole punching device has low production cost, good processability, long service life, simple operation and can be applied to mass production.

Claims

1. A nonlinear helical spring punching device, characterized in that: It includes a fixed base plate, a vertical pole is installed on the fixed base plate, an inner stud is installed on the top of the vertical pole, a support plate is sleeved on the inner stud, a drilling template is installed on the top of the support plate, a spiral spring positioning hole and a drill sleeve installation hole are set on the outer wall of the drilling template, and a drill sleeve is installed in the drill sleeve installation hole.

2. The nonlinear coil spring punching device according to claim 1, characterized in that: More than three reinforcing ribs are evenly distributed between the bottom of the upright pole and the fixed bottom plate.

3. The nonlinear coil spring punching device according to claim 1, characterized in that: The inner stud is welded to the top of the vertical pole. After the support plate is sleeved on the inner stud, the support plate is pressed onto the vertical pole by tightening the bolts installed on the inner stud.

4. The nonlinear coil spring punching device according to claim 1, characterized in that: More than three drilling template installation positions are evenly distributed along the circumferential direction on the top of the support plate.

5. The nonlinear coil spring punching device according to claim 1, characterized in that: The drilling jig comprises an upper die and a lower die, the upper die and the lower die are fixed by bolts, and the lower die is fixed to the supporting plate by bolts.

6. The nonlinear coil spring punching device according to claim 5, characterized in that: An arc U-shaped groove corresponding to the outer dimensions of the coil spring is processed on the side of the upper die, and an arc step is processed adjacent to the arc U-shaped groove on the side of the lower die. The arc U-shaped groove and the arc step cooperate to form a coil spring positioning hole.

7. The nonlinear coil spring punching device according to claim 1, characterized in that: There are three drill sleeve mounting holes, and the drill sleeve is embedded in the drill sleeve mounting holes by interference fit.

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