CN201331422Y

CN201331422Y - Hydraulic spring fatigue-testing machine

Info

Publication number: CN201331422Y
Application number: CNU2009201428463U
Authority: CN
Inventors: 王方高
Original assignee: Anhui Land Group Co Ltd
Current assignee: Anhui Land Group Co Ltd
Priority date: 2009-01-22
Filing date: 2009-01-22
Publication date: 2009-10-21
Anticipated expiration: 2019-01-22

Abstract

The utility model discloses a hydraulic spring fatigue-testing machine, including an upper support plate, a lower plate and four upright posts, two ends of the upright posts are provided with screw threads to fix the upper support plate and the lower plate; an operating cylinder with a differential mode is mounted at a central position of the lower plate; the upper support plate is provided with a disc worktable, and a spring seat for receiving a spring is mounted on the disc worktable; a cylindrical connecting bar is provided to be connected with a piston rod of the operating cylinder, the upper of the connecting bar is provided with a pressure disk having an umbrella-shaped structure, a work plane below the pressure disk is arranged on the top of a machining spring. The utility model employs a hydraulic mechanical structure, the speed is rapid, a transfer capacity is large, and it is capable improving a capability of processing springs, further improving a productivity effect of self-service instrument valve springs and reducing cost; moreover, the noise generated when working by the hydraulic pressure is reduced relatively, it is capable of implementing a humanization produce.

Description

With hydraulic pressure is the spring fatigue test machine of power

Technical field:

The utility model relates generally to a kind of mechanical hook-up, specifically be a kind of be the spring fatigue test machine of power with hydraulic pressure.

Background technology:

The pneumatic disposal route that traditional high-quality instrument spring fatigue test is habitual, the so-called processing is exactly that processed spring still will keep the size of certain limit regulation, promptly will guarantee the reseting precision of spring after spring was compressed several thousand times repeatedly.Over the years, manufacturer all adopts the piston rod of cylinder to do motion repeatedly and transmits pressure, realizes that the fatigue of single spring is handled.This method efficient is low, and speed is slow, and noise is big, and production cost is also high.Part enterprise is placed on several springs in the same air chamber and handles simultaneously, but its speed of production is limited, and loading and unloading are also inconvenient, do not tackle the problem at its root, and disadvantage is more outstanding.

The utility model content:

The utility model purpose is exactly in order to remedy the defective of prior art, provide a kind of simple in structure, noise is relatively low, production efficiency is high is the spring fatigue test machine of power with hydraulic pressure.

The utility model is achieved through the following technical solutions:

With hydraulic pressure is the spring fatigue test machine of power, and it is characterized in that: its physical construction is: include upper backup pad, lower shoe and four root posts, the two ends of column are threaded, and upper backup pad, lower shoe are fixed together; Operating cylinder with differential form has been installed on the middle position on the lower shoe; On the described upper backup pad, the disk worktable is installed, the spring base of putting spring is installed on the disk worktable; A cylindrical connecting rod that is connected usefulness with the operating cylinder piston rod is arranged, and a pressure disc that is shaped as the umbrella structure is installed in the top of connecting rod, and the working face of pressure disc below is positioned at by test spring top, and described operating cylinder piston rod is controlled by fluid pressure drive device.

The piston rod of the utility model by cylinder body moves repeatedly and spring carried out thousands of times compressions, changed the pneumatic disposal route of habitually practising in the original industry with hydraulicdriven method.

The outer hydraulic system that connects of described oil cylinder adopts the differential type oil circuit, improves return movement speed and prevents the oil circuit excessive heating with this; A hydraulicchange-over valve is installed in the differential oil line, and under the normality, it plays the pipe effect.Realize that the feature that hydraulic operated valve cuts out determines that by pilot valve it is the two-position four-way solenoid directional control valve of a low discharge.The oil circuit at a slow speed of an adjustable speed in parallel with the differential type oil circuit is used the loading position that turns back to part with the body of exerting pressure at the relief that fulfils assignment, and has considered the security of working environment simultaneously.Adopt the direction of coming control oil channel of a two-position four-way solenoid directional control valve on the described differential type oil circuit, this valve under normal conditions, the connection of the pressure oil of its oil inlet and outlet and system, the oil-out of two-position four-way solenoid directional control valve is connected with the lower end oil-in of oil cylinder again.The oil-in of the upper part of its two oil cylinder directly is connected with system pressure oil.Because the area up and down of piston is different, there is certain area difference, when oil circuit is connected up and down, big above the area below the situation lower piston of same pressure, the thrust that the below is produced is necessarily greater than the top, this moment, piston moved upward under action of pressure, and its piston rod is also along with piston makes progress together.In the process of motion, the pressure oil that upper cylinder half is discharged and the fuel feeding of system inject the cavity of resorption of oil cylinder together, and flow has increased, speed is also fast, promptly allow a part of oil return the flowing of internal system, directly flow to the cavity of resorption of oil cylinder, avoided the excessive heating of system simultaneously again.When described two-position four-way solenoid directional control valve commutates, the internal oil passages of this valve also changes, direct and the oil return line connection of the cavity of resorption of its oil cylinder, this moment, the oil circuit that is connected with system of epicoele of oil cylinder was constant, the hydraulic oil that is system still acts on above the piston of oil cylinder, and the cavity of resorption of oil cylinder is in the state of draining the oil, and piston rod also just moves downward with piston.

Going back parallel connection in the described oil piping system can make piston make the reversing oil circuit and the speed governing oil circuit of microinching up and down.This oil circuit is made up of three position four-way electromagnetic valve, retaining valve and the throttling valve of O type function, when above-mentioned oil circuit enters at a slow speed duty must and pilot valve enter operation simultaneously.Its reason is to utilize hydraulic operated valve to cut off the passage of differential oil line.Pilot valve has played the selection effect of a working method at this.

The utility model has the advantages that:

Mechanical hook-up in the utility model is power with hydraulic pressure, and its method is that speed is fast, and transmission power is big, can handle a fairly large number of spring product simultaneously, and then has improved the production efficiency of the required high-quality spring of instrument and meter for automation valve, has reduced cost; And the noise that hydraulic system the time is produced in work is relatively low has realized hommization production.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the system diagram of control oil channel in the utility model.

Embodiment:

With hydraulic pressure is the spring fatigue test machine of power, and its physical construction is: include upper backup pad 1, lower shoe 2 and four root posts 3, the two ends of column are threaded, and upper backup pad 1, lower shoe 2 are fixed together; Operating cylinder 4 with differential form has been installed on the middle position on the lower shoe 2; On the described upper backup pad 1, disk worktable 5 is installed, the spring base of putting spring is installed on the disk worktable 5; A cylindrical connecting rod 6 that is connected usefulness with operating cylinder 4 piston rods is arranged, and a pressure disc 7 that is shaped as the umbrella structure is installed in the top of connecting rod, and the working face of pressure disc 7 belows is positioned at spring 8 tops.

Fluid pressure drive device 9 is made up of three oil circuits, i.e. differential type, adjustable speed formula and have the working oil path of switch forms.

Described differential type oil circuit, it is the groundwork oil circuit of this machine.A two-position four-way solenoid valve 10 has been installed in the oil circuit, the pressure oil of its system communicates with the cavity of resorption of oil-in 11, oil-out 12 and oil cylinder 4 under the situation that also claims under normal conditions not have to switch on, and the epicoele of oil cylinder is direct and the pressure oil of system is connected, under the identical situation of oil pressure, the lifting surface area of the upper and lower cavity of its piston does not wait, the acting force that is produced is also different, and under the situation of pressure differential, piston actuated bar 13 moves upward.When this solenoid valve energising, the internal oil passages that hydraulic fluid port is 11,12 is cut off.This moment, hydraulic fluid port 12 passed through together with oil return line, and oil cylinder epicoele its piston actuated bar under the effect of oil pressure just moves upward.This oil circuit feature also is included in the test speed that throttling valve 14 is used to regulate compression spring is housed on the oil return line.Another oil-out at two-position four-way is loaded onto pressure switch 15, is the signal source of counting usefulness.

Adjustable speed formula oil circuit is in parallel with differential oil line, and its effect is the at a slow speed oil circuit of back for loading and unloading usefulness that fulfil assignment.Oil circuit comprises the solenoid valve 16 of an O type function 3-position 4-way, and two oil-outs of its valve are connected with the upper and lower opening of operating cylinder respectively.Each a pair of mechanism that forms adjustable speed by throttling valve 17, retaining valve 18 in parallel at the oil-out two ends of this valve in addition.

Above-mentioned differential type oil circuit and adjustable speed formula oil circuit are to represent its two independence and don't two working oil path can using simultaneously.The purpose that oil circuit is switched in design is to have selection character.Switching oil circuit is made of hydraulic operated valve 19 and pilot valve 20, hydraulic operated valve has only played a passage under the normality, when pilot valve 20 work, hydraulic operated valve is under the effect of pilot valve, two oil-outs have been closed, also just removed the function that the differential type oil circuit is possessed, adjustable speed formula oil circuit just can come into operation.

Electric signal has comprised two travel switches, is used to regulate 0 position that spring is exerted pressure and the decrement of pressure disc.

Claims

1, be the spring fatigue test machine of power with hydraulic pressure, it is characterized in that its physical construction includes upper backup pad (1), lower shoe (2) and four root posts (3), the two ends of column are threaded, and upper backup pad (1), lower shoe (2) are fixed together; Operating cylinder (4) with differential form has been installed on the middle position on the lower shoe (2); On the described upper backup pad (1), disk worktable (5) is installed, the spring base of putting spring is installed on the disk worktable (5); A cylindrical connecting rod (6) that is connected usefulness with operating cylinder (4) piston rod is arranged, a pressure disc (7) that is shaped as the umbrella structure is installed in the top of connecting rod, the working face of pressure disc (7) below is positioned at processed spring (8) top, and described operating cylinder (4) piston rod is subjected to fluid pressure drive device (9) control.