Double-spring device and sizing gauge

Abstract

The sizing gauge of the double-spring device comprises a body, a round hole and a first roller assembly, the first roller assembly comprises a roller and the double-spring device, the double-spring device comprises a linear spring and an air spring, the air spring is an air cylinder, the air cylinder comprises an air cylinder body and an air cylinder shaft, and the air cylinder body is connected with the air cylinder shaft. The air cylinder shaft can do reciprocating rectilinear motion under the action of air pressure of the air cylinder, one end of the linear spring is connected with the air cylinder body, the central axis of the linear spring coincides with or is parallel to the central axis of the air cylinder shaft, and elastic force applied by the double-spring device is in the radial direction of the circular hole and points to the circle center of the circular hole. According to the sizing gauge with the double-spring device, the double-spring device is adopted for providing elastic force, the line spring with the small line diameter replaces a line spring with the large line diameter, the elastic force of the line spring and the elastic force of the gas spring are basically kept unchanged after the line spring and the gas spring are slightly extruded, and when the roller tightly holds a can body with a convex mark, the elastic force is not changed. And the holding force of the roller on the convex mark is not obviously increased, so that the convex mark deforms and loses stereoscopic impression.

Description

Technical Field

[0001] The utility model relates to the technical field of sizing overlap control for iron welding of a three-piece can body with a convex mark, in particular to a double spring device and a sizing gauge. Background Art

[0002] The original three-piece cans use two or one wire springs to achieve rolling welding when the can body is welded, and the overlap amount depends on the clamping force, and the clamping force depends on the elastic force of the wire spring. The compression length of the wire spring is inversely proportional to its elastic force. When the convex mark position of the can body passes through the roller, the compression length of the wire spring is increased, the elastic force of the wire spring is significantly increased, and the three-dimensional part of the convex mark is severely depressed, affecting the three-dimensional sense of the convex mark. Therefore, the original three-piece cans have the following problems when welding the can body: 1. The convex mark is crushed when welding the convex mark product; 2. When the verticality of the diagonal of the non-convex mark product is deviated, there will be false welding and false welding; 3. When the position of the convex mark changes, parts need to be replaced, which is more troublesome. Utility Model Content

[0003] In order to solve the above problems existing in the original three-piece can when welding the can body, the utility model reduces the elastic force of the wire spring through a double spring device, and supplements the reduced elastic force of the wire spring through a gas spring, so that the can body maintains a relatively constant holding force during welding.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a double spring device, including a wire spring, a gas spring and a movable block, wherein the wire spring is a compression spring, and the gas spring is a cylinder, which includes a cylinder body, a cylinder shaft and a piston, one end of the cylinder shaft is connected to the piston, and can perform reciprocating linear motion under the action of the cylinder gas pressure, one end of the compression spring is connected to the cylinder body, and the other end of the compression spring and the end of the cylinder shaft away from the piston are both connected to the same end face of the movable block, and the central axis of the compression spring coincides with or is parallel to the central axis of the cylinder shaft, and the elastic force of the gas spring and the elastic force of the wire spring complement each other. Since the elastic force of the gas spring is constant, the double spring device can use a wire spring with a smaller wire diameter to replace a wire spring with a thicker wire diameter, so that the elastic force of the two springs after compression remains basically unchanged, and the elastic force of the device can also be adjusted by precisely adjusting the air pressure of the cylinder.

[0005] Preferably, the wire spring is sleeved on the cylinder shaft. The central axis of the compression spring coincides with the central axis of the cylinder shaft, which can ensure that the elastic force directions of the wire spring and the gas spring are consistent.

[0006] Preferably, the wire spring is a plurality of compression springs, and the plurality of compression springs are evenly distributed on a circumference centered on the cylinder axis, so as to ensure a stable elastic force is provided outward.

[0007] The utility model also provides a double spring device sizing gauge, comprising a body, a circular hole and a first roller assembly, wherein the circular hole is opened in the middle of the body, and the first roller assemblies are arranged on both sides and the bottom edge of the circular hole, and the first roller assembly comprises a roller and a double spring device, and the elastic force applied by the double spring device to the roller is along the radial direction of the circular hole and points to the center thereof.

[0008] The double spring device sizing gauge adopts a double spring device to provide elastic force, and a wire spring with a smaller wire diameter is used to replace a wire spring with a thicker wire diameter. The elastic force of the wire spring and the gas spring after being slightly squeezed remains basically unchanged, so that when the roller holds the can body with a convex mark, the roller's holding force on the convex mark will not cause the convex mark to deform and lose its three-dimensional sense. When the roller cannot hold the can body for normal welding due to the small elastic force design of the wire spring, so that the weld overlap cannot be completed, a gas spring is added to apply a supplementary elastic force to the roller through the gas spring. The air pressure in the cylinder can also be precisely adjusted through the pressure regulating valve to adjust the elastic force of the double spring device to meet the elastic force requirements of the roller holding the can body, and normal welding is performed until the overlap at the tail end of the weld is stable; when the convex mark position of the can body passes through the roller, the reaction force of the convex mark on the roller causes the cylinder axis to move slightly in the opposite direction. Since the applied air pressure is constant, the reaction force pushes the piston rod, and the air is discharged from the other air inlet end, thereby ensuring that the holding force of the convex mark position of the can body when passing through the roller remains basically unchanged.

[0009] Preferably, the first roller assembly includes a plurality of double spring devices, which can solve the problem that the machine needs to be adjusted when the position of the convex mark on the can body changes.

[0010] Preferably, the first roller assembly further comprises a roller seat, and the cylinder body of the double spring device is fixedly connected to the roller seat.

[0011] Preferably, the first roller assembly further comprises a roller frame, the roller is mounted on the roller frame, and the roller frame also serves as a movable block of the double spring device.

[0012] Preferably, the first roller assembly further includes a ceramic bearing and a roller shaft, the ceramic bearing is fixedly connected to the roller frame, both ends of the roller shaft are connected to the ceramic bearing, and the roller is sleeved on the roller shaft.

[0013] Preferably, the first roller assembly further comprises an adjusting nut, the adjusting nut is fixedly connected to the cylinder shaft, and the adjusting nut can be rotated to drive the cylinder shaft to move slightly. The cylinder shaft moves slightly, driving the roller frame to move slightly, causing the gap between the can body and the roller to change slightly, and the elastic force of the roller on the can body to change slightly, thereby achieving fine adjustment of the elastic force of the double spring device.

[0014] Preferably, the double spring device sizing gauge further includes a second roller assembly and a guide wheel assembly, wherein the second roller assembly is arranged at the top edge of the circular hole, and the guide wheel assembly is arranged on both sides of the first roller assembly along the axis of the circular hole.

[0015] Technical effects of the utility model:

[0016] 1. The elastic force of the wire spring and the gas spring with constant air pressure is combined to apply to the roller as the clamping force for welding. The elastic force of the wire spring is designed to be relatively small, which solves the problem that the elastic force becomes larger after the wire spring is compressed. At the same time, the gas spring is used to supplement the clamping force, so as to achieve the goal of not crushing the convex mark and ensuring the overlap of welding.

[0017] 2. Since the gas spring has a constant elastic force, the clamping force adaptation range of the sizing gauge is increased and the control standard for the squareness of the plate is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a double spring device sizing gauge;

[0019] Figure 2 is a structural schematic diagram of a first roller assembly;

[0020] Figure 3 It is a schematic structural diagram of the first roller assembly along the BB line section.

[0021] The meanings of the numbers in the above figures are as follows: 1-main body, 2-first roller assembly, 3-second roller assembly, 4-circular hole, 5-guide wheel assembly, 21-roller, 22-roller frame, 23-roller seat, 24-compression spring, 25-cylinder shaft, 26-roller shaft, 27-ceramic bearing, 28-adjusting nut, 29-cylinder body. DETAILED DESCRIPTION

[0022] Refer to the following Figure 1-3 The utility model introduces a specific implementation method of a double spring device and a sizing gauge.

[0023] The utility model discloses a double spring device, comprising a wire spring, a gas spring and a movable block, wherein the wire spring is a compression spring 24, and the gas spring is a cylinder, wherein the cylinder comprises a cylinder body 29, a cylinder shaft 25 and a piston, wherein one end of the cylinder shaft 25 is connected to the piston and can perform reciprocating linear motion under the action of the cylinder gas pressure, wherein one end of the compression spring 24 is connected to the cylinder body 29, and the other end of the compression spring 24 and the end of the cylinder shaft 25 away from the piston are both connected to the same end face of the movable block, and the central axis of the compression spring 24 is coincident with or parallel to the central axis of the cylinder shaft 25, and the elastic force of the gas spring and the elastic force of the wire spring complement each other. Since the elastic force of the gas spring is constant, the double spring device can use a wire spring with a smaller wire diameter to replace a wire spring with a thicker wire diameter, so that the resultant force of the two springs after compression remains basically unchanged, and the magnitude of the resultant force can also be adjusted by precisely adjusting the elastic force of the gas spring.

[0024] In a preferred embodiment of the double spring device, the compression spring 24 is sleeved on the cylinder shaft 25. This design enables the central axis of the compression spring to coincide with the central axis of the cylinder shaft, thereby ensuring that the elastic force directions of the line spring and the gas spring are consistent.

[0025] In another preferred embodiment of the double spring device, the line spring is selected from a plurality of compression springs 24, and the plurality of compression springs 24 are evenly distributed on a circumference centered on the cylinder shaft 25. This design can ensure that a stable elastic force is provided outwardly.

[0026] The utility model discloses a double spring device sizing gauge, comprising a body 1, a first roller assembly 2, a second roller assembly 3, a circular hole 4 and a guide wheel assembly 5, wherein the circular hole 4 is opened in the middle of the body 1, the first roller assembly 2 is arranged on both sides and the bottom edge of the circular hole 4, and the second roller assembly 3 is arranged at the top edge of the circular hole 4, and the guide wheel assembly 5 is arranged on both sides of the first roller assembly 2 along the axis of the circular hole 4; the first roller assembly 2 comprises a double spring device, a roller 21, a roller frame 22, a roller seat 23, a roller shaft 26 and a ceramic bearing 27, the double spring device is fixed on the roller seat 23, the double spring device comprises a wire spring, a gas spring and a movable block, the wire spring is a compression spring 24, the gas spring is a cylinder, and the cylinder comprises a cylinder body 29, a cylinder The cylinder shaft 25 and the piston, one end of the cylinder shaft 25 is connected to the piston and can do reciprocating linear motion under the action of the cylinder air pressure, one end of the compression spring 24 is connected to the cylinder body 29, the other end of the compression spring 24 and the end of the cylinder shaft 25 away from the piston are connected to the same end face of the roller frame 22, and the central axis of the compression spring 24 is parallel to the central axis of the cylinder shaft 25, the elastic force of the gas spring and the elastic force of the wire spring complement each other, the ceramic bearing 27 is fixedly connected to the roller frame 22, the two ends of the roller shaft 26 are connected to the ceramic bearing 27, the roller 21 is sleeved on the roller shaft 26, the cylinder shaft 25 and the wire spring 24 have an end face pressed against the roller frame 22 and the elastic force applied to the roller 21 is along the radial direction of the circular hole 4 and points to its center.

[0027] When the double-spring device sizing gauge is used, the guide wheel assembly 5 first transports the body of the three-piece can to the working space formed by the first roller assembly 2 and the second roller assembly 3. The roller 21, under the elastic force of the double-spring device, holds the body of the three-piece can tightly, so that the three-piece can can be welded normally. When the position with the convex mark of the three-piece can passes through the roller 21, there is a reaction force on the roller 21, which drives the cylinder shaft 25 to move slightly in the opposite direction. Since the applied air pressure is constant, the cylinder shaft 25 pushes the piston and the air is discharged from the other air inlet end, thereby ensuring that the holding force of the convex mark position of the can body remains basically unchanged when passing through the roller 21.

[0028] The double spring device sizing gauge adopts a double spring device to provide elastic force, and a wire spring with a smaller wire diameter is used to replace a wire spring with a thicker wire diameter. The elastic force of the wire spring and the gas spring after being slightly squeezed remains basically unchanged, so that when the roller hugs the can body with a convex mark, the roller's clamping force on the convex mark will not cause the convex mark to deform and lose its three-dimensional sense. When the roller cannot hold the can body for normal welding due to the small elastic force design of the wire spring, so that the weld overlap cannot be completed, a gas spring is added to apply a supplementary elastic force to the roller through the gas spring. The air pressure in the cylinder can also be precisely adjusted through the pressure regulating valve to adjust the elastic force of the double spring device to meet the elastic force requirements of the roller holding the can body, and normal welding is performed until the overlap at the end of the weld is stable.

[0029] In a preferred embodiment of the double spring device sizing gauge, the first roller assembly 2 is provided with a plurality of double spring devices, which can solve the problem that the position of the convex mark on the can body needs to be adjusted.

[0030] Another preferred embodiment of the double spring device sizing gauge, the first roller assembly 2 further includes an adjusting nut 28, the adjusting nut 28 is fixedly connected to the cylinder shaft 25, and the adjusting nut 28 is rotated to drive the cylinder shaft 25 to move slightly. The cylinder shaft 25 moves slightly, driving the roller frame 22 to move slightly, the gap between the can body and the roller 21 changes slightly, and the elastic force of the roller on the can body also changes slightly, thereby achieving fine adjustment of the elastic force of the double spring device.

[0031] When testing the double-spring device sizing gauge of the utility model, a three-piece can with a diameter of 98.9 and a height of 149 is tested. According to the national standard, the maximum allowable straightness deviation AB is 0.25mm, the length allowable deviation is +0.06, and the maximum straightness deviation AB of the selected plate exceeding the standard is 1.25mm (5 times), and the length allowable deviation is +0.2mm (3 times); this effect reduces the size control requirements for the previous iron cutting and reduces the scrap rate.

[0032] Technical effects of the utility model:

[0033] 1. The elastic force of the wire spring and the gas spring with constant air pressure is applied to the roller as the clamping force for welding, which solves the problem that the elastic force of the wire spring becomes larger after compression. At the same time, the gas spring is used to supplement the clamping force, so as to achieve the goal of not crushing the convex mark and ensuring the overlap of welding.

[0034] 2. Since the gas spring has a constant elastic force, the clamping force adaptation range of the sizing gauge is increased and the control standard for the squareness of the plate is reduced.

[0035] The above description is only the best embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A double spring device, It is characterized in that It includes a wire spring, a gas spring and a movable block. The wire spring is a compression spring. The gas spring is a cylinder. The cylinder includes a cylinder body, a cylinder shaft and a piston. One end of the cylinder shaft is connected to the piston and can perform reciprocating linear motion under the action of the cylinder air pressure. One end of the compression spring is connected to the cylinder body, and the other end of the compression spring and the end of the cylinder shaft away from the piston are connected to the same end face of the movable block, and the central axis of the compression spring coincides with or is parallel to the central axis of the cylinder shaft. The elastic force of the gas spring and the elastic force of the wire spring complement each other.

2. A double spring device according to claim 1, It is characterized in that The wire spring is sleeved on the cylinder shaft.

3. A double spring device according to claim 1 or 2, It is characterized in that The wire spring is selected from a plurality of compression springs, and the plurality of compression springs are evenly distributed on a circumference centered on the cylinder axis.

4. A double spring device sizing gauge, comprising a body, a circular hole and a first roller assembly, wherein the body has the circular hole in the middle, It is characterized in that A first roller assembly is arranged on both sides and the bottom edge of the circular hole, and the first roller assembly includes a roller and any double spring device in claims 1-3, and the elastic force applied by the double spring device to the roller is along the radial direction of the circular hole and points to the center of the circular hole.

5. A double spring device sizing gauge according to claim 4, It is characterized in that The first roller assembly includes a plurality of dual spring arrangements.

6. A double spring device sizing gauge according to claim 4 or 5, It is characterized in that The first roller assembly also includes a roller seat, and the cylinder body of the double spring device is fixedly connected to the roller seat.

7. A double spring device sizing gauge according to claim 4 or 5, It is characterized in that The first roller assembly further comprises a roller frame, the roller is mounted on the roller frame, and the roller frame also serves as a movable block of the double spring device.

8. A double spring device sizing gauge according to claim 7, It is characterized in that The first roller assembly further comprises a ceramic bearing and a roller shaft, the ceramic shaft is fixed on the roller frame, both ends of the roller shaft are connected to the ceramic bearing, and the roller is sleeved on the roller shaft.

9. A double spring device sizing gauge according to claim 4 or 5, It is characterized in that The first roller assembly also includes an adjusting nut, which is fixedly connected to the cylinder shaft. Rotating the adjusting nut can drive the cylinder shaft to move slightly.

10. A double spring device sizing gauge according to claim 4 or 5, It is characterized in that It also includes a second roller assembly and a guide wheel assembly, wherein the second roller assembly is arranged at the top edge of the circular hole, and the guide wheel assembly is arranged on both sides of the first roller assembly along the axis of the circular hole.

Images