Workpiece clamping control system of processing machine

Abstract

A workpiece clamping control system of a processing machine is applied to high and low pressure switching control of workpiece clamping of the processing machine and is characterized by comprising an oil pressure control module connected with a spindle mechanism, the oil pressure control module comprises an oil pressure switching loop for high and low pressure switching and an oil pressure cylinder, and the oil pressure cylinder is connected with the spindle mechanism. A high-pressure oil way and a low-pressure oil way are switched and changed through a controller, so that the oil hydraulic cylinder provides different working pressures to drive the main shaft mechanism to clamp a workpiece to perform different processing flows; by means of the design, the effect that a workpiece is clamped consistently to be subjected to two-section type machining (such as rough machining and finish machining) at a time is achieved.

Description

Technical Field

[0001] The utility model relates to a processing machine clamping technology capable of switching the working pressure of a hydraulic cylinder. Background Art

[0002] According to the specification, a Swiss-type lathe is a lathe with a fixed tool and a movable spindle to move the workpiece to be processed. The existing Swiss-type lathe has a main spindle and a secondary spindle. The Swiss-type lathe clamps the workpiece through the main spindle for the first processing, and when the workpiece needs to be processed for the second time, it uses the working axial movement and the clamping of the rotary cylinder to move the workpiece to the secondary spindle for the second processing.

[0003] Among them, the workpiece to be processed for the first time is usually solid, and the main spindle needs to clamp the workpiece with a larger clamping force (heavy clamping). The workpiece to be processed for the second time is usually changed from solid to hollow, so the sub-spindle needs to clamp the workpiece with a smaller clamping force (light clamping) to avoid deformation and damage of the workpiece.

[0004] However, the existing Swiss-type lathes only have one set of hydraulic controllers, and only use a single hydraulic circuit to provide pressure to both the main spindle and the sub-spindle to clamp the workpiece. Therefore, when the workpiece is transferred from the main spindle to the sub-spindle for secondary processing, the single hydraulic circuit needs to switch from providing a large pressure to the main spindle to providing a small pressure to the sub-spindle. In addition to the buffer time of the pressure conversion process being very time-consuming and affecting the processing efficiency, the pressure range provided by the single hydraulic circuit is also limited, and it is impossible to provide a smaller pressure to the sub-spindle to clamp the workpiece, which may cause damage and deformation of the workpiece.

[0005] Therefore, a clamping control system for a processing machine is developed, which is similar to Taiwan Patent No. I824791 of China. The patent is characterized in that: a hydraulic control device, a main spindle and a sub-spindle are provided; the hydraulic control device has a first hydraulic cylinder, a second hydraulic cylinder, a first controller and a second controller, the first controller is used to control a spindle pressure of the first hydraulic cylinder, the second controller is used to control a sub-spindle pressure of the second hydraulic cylinder, the sub-spindle pressure includes an opening pressure and a clamping pressure, and the clamping pressure is less than or equal to the opening pressure; the first hydraulic cylinder provides the main spindle with the spindle pressure to clamp an original workpiece and perform a first process to form a processed workpiece; the second hydraulic cylinder provides the sub-spindle with the sub-spindle pressure to clamp the processed workpiece and perform a second process; through the first controller and the second controller, the spindle pressure provided to the main spindle and the sub-spindle pressure provided to the sub-spindle can be controlled respectively through different hydraulic circuits, so that when the workpiece is transferred from the main spindle to the sub-spindle for the second process, the buffer time of pressure conversion is saved and the processing efficiency is improved.

[0006] When the hydraulic pressure of the aforementioned center-type processing machine is switched, the required oil pressure needs to be readjusted and the workpiece needs to be removed and re-clamped. For smart production factories, the processing time needs to be effectively optimized, so the control structure of the clamping pressure of the processing machine needs to be further improved, which is what the industry is eager to break through. Utility Model Content

[0007] In order to solve the above-mentioned deficiencies of the prior art, the main purpose of the utility model is to provide a workpiece clamping control system for a processing machine, which utilizes the design of a variable higher and lower pressure oil pressure switching circuit to provide different working pressures and can perform two-stage processing in one go, in order to overcome the difficulties in the prior art.

[0008] Technical means for solving the problem. In order to achieve the above-mentioned purpose, the utility model provides a workpiece clamping control system for a processing machine, which is applied to the high-low pressure switching control of the workpiece clamping of the processing machine, and its characteristics include a spindle mechanism for clamping the workpiece; a hydraulic control module connected to the spindle mechanism, the hydraulic control module includes a hydraulic switching circuit capable of switching high and low pressures and a hydraulic cylinder, the hydraulic cylinder is connected to the spindle mechanism and supplies oil pressure to drive the spindle mechanism to clamp the workpiece; a controller is connected to the hydraulic control module and controls the hydraulic switching circuit to switch and supply a high oil pressure to the hydraulic cylinder, so that the spindle mechanism clamps the workpiece with high pressure to perform a first process, and switches and supplies a low oil pressure to the hydraulic cylinder, so that the spindle mechanism clamps the workpiece with low pressure to perform a second process. The utility model switches and changes the high and low pressure oil circuits through the controller, and then allows the oil pressure cylinder to provide different working pressures to drive the spindle mechanism to clamp the workpiece for different processing flows; by virtue of this design, the effect of consistently clamping the workpiece for two-stage processing (such as roughing and finishing) is achieved in one go.

[0009] The oil pressure switching circuit includes a switching control valve, a clamping control valve, a releasing control valve and a throttle valve.

[0010] Among them, the oil pressure switching circuit further includes a flow limiting valve, which provides oil pressure flow limitation for the oil pressure switching circuit, can increase the switching stability of the oil pressure cylinder, and thereby ensure that after the low oil pressure clamping workpiece is finely processed, the oil pressure flow is limited and the pressure is slowly released to prevent the workpiece from falling.

[0011] The oil pressure switching circuit further includes a high pressure adjustment rod and a low pressure adjustment rod connected to the switching control valve.

[0012] The oil pressure control module can switch between high and low pressures in a range of 5 to 30 kg / cm 2 . BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 :It is a schematic diagram of the structure of the utility model Figure 1 ;

[0014] Figure 2 :It is a schematic diagram of the structure of the utility model Figure 2 ;

[0015] Figure 3 : This is a schematic diagram of the appearance of the oil pressure control module of the utility model;

[0016] Figure 4 : This is a schematic diagram of the appearance of the oil pressure control module of the utility model from another angle;

[0017] Figure 5 : It is the oil circuit configuration diagram of each control valve of the high and low oil pressure switching circuit of the utility model.

[0018]

Explanation of symbols

[0019] 1: Spindle mechanism

[0020] 2: Oil pressure control module

[0021] 21: Hydraulic switching circuit

[0022] 211: Switching control valve

[0023] 212: Clamping control valve

[0024] 213:Relax control valve

[0025] 214: Throttle valve

[0026] 215: High pressure adjustment rod

[0027] 216: Low pressure adjustment lever

[0028] 217: Flow limiting valve

[0029] 22: Hydraulic cylinder

[0030] 3: Controller DETAILED DESCRIPTION

[0031] The present invention is hereby described in detail in the form of embodiments in conjunction with the accompanying drawings. The drawings used in the text are only for illustration and auxiliary description purposes and may not be the actual proportions and precise configurations after the implementation of the present invention. Therefore, the proportions and configurations of the attached drawings should not be used to limit the patent scope of the present invention in actual implementation. This should be stated in advance.

[0032] See also Figure 1-2 is a structural diagram of the utility model, and Figure 3-4 This is a schematic diagram of the appearance of the hydraulic control module of the utility model. The workpiece clamping control system of the processing machine mainly includes:

[0033] A spindle mechanism (1) for clamping a workpiece;

[0034] A hydraulic control module (2) connected to the spindle mechanism (1), comprising a hydraulic switching circuit (21) capable of switching between high and low pressures and a hydraulic cylinder (22), wherein the hydraulic cylinder (22) is connected to the spindle mechanism (1) and supplies hydraulic pressure to drive the spindle mechanism (1) to clamp a workpiece;

[0035] A controller (3) is connected to the oil pressure control module (2) and controls the oil pressure switching circuit (21) to switch and supply a high oil pressure to the oil pressure cylinder (22), so that the spindle mechanism (1) clamps the workpiece with high pressure to perform a first process (rough machining), or switches and supplies a low oil pressure to the oil pressure cylinder (22), so that the spindle mechanism (1) clamps the workpiece with low pressure to perform a second process (finishing machining).

[0036] In addition to the above features, the oil pressure switching circuit (21) includes a switching control valve (211), a clamping control valve (212), a release control valve (213) and a throttle valve (214). Figure 5 The valve configuration diagram of the hydraulic circuit of the utility model is shown, wherein the hydraulic cylinder (22) is provided with port A and port B, the switching control valve (211) is provided with a low pressure end a1 and a high pressure end b1, the clamping control valve (212) is provided with a clamping end a2 and a return end b2, the release control valve (213) is provided with a release end a3 and a return end b3, and the throttle valve (214) is provided with a throttle end a4 and a non-throttle end b4; the actual operation process is described by the following steps:

[0037] The first step 1 is that when the spindle mechanism (1) clamps the workpiece with high pressure, the high pressure is controlled by the B port of the hydraulic cylinder, so that the A port of the hydraulic cylinder controls the oil supply through the clamping end a2 of the clamping control valve (212), the B port of the hydraulic cylinder controls the return flow through the return end b3 of the release control valve (213), and the B port of the hydraulic cylinder quickly returns the oil through the non-throttling end b4 of the throttle valve (214), so that the spindle mechanism (1) clamps the workpiece with high pressure to perform the rough processing of the first process.

[0038] In addition, the oil pressure switching circuit (21) further includes a high-pressure adjustment rod (215) and a low-pressure adjustment rod (216) connected to the switching control valve (211). The high-pressure adjustment rod (215) corresponds to adjusting the high oil pressure supplied by the oil pressure cylinder (22) to the spindle mechanism (1), such as adjusting the high oil pressure (clamping force) corresponding to the rough machining of the above-mentioned first process, and the low-pressure adjustment rod (216) corresponds to adjusting the low oil pressure supplied by the oil pressure cylinder (22) to the spindle mechanism (1), that is, when switching to low pressure, the low oil pressure (clamping force) of the finishing process of the second process can be adjusted.

[0039] When step 2 switches to low pressure, the low pressure is controlled by the A port of the hydraulic cylinder, and the A port of the hydraulic cylinder controls the oil supply through the clamping end a2 of the clamping control valve (212), and the B port of the hydraulic cylinder controls the return flow through the return end b3 of the release control valve (213), and the A port of the hydraulic cylinder returns the oil through the throttle end a4 of the throttle valve (214), thereby switching to low-pressure oil supply and throttled oil return; the next step 3 switches the spindle mechanism (1) to stop oil supply, that is, the A port of the hydraulic cylinder controls the low pressure, and the B port of the hydraulic cylinder returns the oil through the return end b2 of the clamping control valve (212), and the A port of the hydraulic cylinder controls the release end a3 of the release control valve (213) to release, and the A port of the hydraulic cylinder returns the oil through the throttle end a4 of the throttle valve (214), thereby allowing the spindle mechanism (1) to release and switch to low-pressure oil supply.

[0040] Then, step 4 is continued, the spindle mechanism (1) is relaxed and switched to stop oil supply, that is, the oil pressure is controlled by the A port of the oil pressure cylinder, the oil pressure cylinder A port is controlled to supply oil through the clamping end a2 of the clamping control valve (212), the oil pressure cylinder B port controls the return flow through the return end b3 of the release control valve (213), and the oil pressure cylinder A port is returned through the throttle end a4 of the throttle valve (214), and the spindle mechanism (1) is clamped and switched to low-pressure oil supply; finally, step 5 is performed by the oil pressure cylinder The port A of the hydraulic cylinder controls the low pressure, allowing the port A of the hydraulic cylinder to supply oil through the clamping end a2 of the clamping control valve (212), and the port B of the hydraulic cylinder to control the return flow through the return end b3 of the release control valve (213), and allowing the port B of the hydraulic cylinder to quickly return oil through the non-throttling end b4 of the throttle valve (214), and then through pressure detection, the high-pressure switching to low-pressure action is completed; further, the pressure range of the high and low pressures that can be switched in the hydraulic control module (2) is 5 to 30 kg / cm 2 .

[0041] In addition, the oil pressure switching circuit (21) further includes a flow limiting valve (217), and the flow limiting valve (217) provides oil pressure flow limitation for the oil pressure switching circuit (21). After switching to low pressure clamping for finishing in the above steps 4-5, the oil pressure flow is slowly returned through the oil pressure flow limitation of the flow limiting valve (217), which can ensure that the switching stability of the oil pressure cylinder (22) can be increased when switching between high and low oil pressures. At the same time, after finishing the workpiece clamped at low oil pressure is completed, the oil pressure flow is limited and the pressure is slowly released, and the clamped workpiece is slowly released so that the workpiece will not fall.

[0042] The utility model has the advantages that:

[0043] 1. The hydraulic pump introduces the hydraulic pressure through the P port, and the hydraulic pressure is supplied to the high-pressure adjustment rod and the low-pressure adjustment rod at the same time. The high and low pressure switching of the hydraulic pressure is controlled by the switching control valve, and the actuation of the hydraulic cylinder A port and B port is controlled by the clamping control valve and the loosening control valve. In this way, the high and low pressure oil circuits can be switched through a controller, and the hydraulic cylinder can provide different working pressures to drive the spindle mechanism to clamp the workpiece for different processing processes. With this design, the effect of consistently clamping the workpiece for two-stage processing (such as roughing and finishing) can be achieved in one go.

[0044] 2. A flow limiting valve is used in the hydraulic switching circuit to provide hydraulic flow limitation for the hydraulic switching circuit. In addition to increasing the switching stability of the hydraulic cylinder, it also ensures that after the low-pressure clamping of the workpiece is completed, the hydraulic flow can be limited to slowly release the pressure, allowing the workpiece to be slowly released without the loss of traditional workpieces falling.

[0045] From the above, it can be seen that the utility model has indeed achieved the desired improved effect by breaking through the previous technical structure, and it is not easy for people familiar with the art to think of it. Moreover, the utility model has not been disclosed before the application, and its creativity and practicality obviously meet the application requirements of utility model patents.

[0046] The embodiments described above are only for illustrating the technical ideas and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the patent scope of the utility model. That is, all equivalent changes or modifications made according to the spirit disclosed by the utility model should still be included in the patent scope of the utility model.

Claims

1. A workpiece clamping control system for a processing machine, characterized in that: It mainly includes: A spindle mechanism for clamping a workpiece; A hydraulic control module connected to the spindle mechanism, comprising a hydraulic switching circuit capable of switching between high and low pressures and a hydraulic cylinder, wherein the hydraulic cylinder is connected to the spindle mechanism and supplies hydraulic pressure to drive the spindle mechanism to clamp the workpiece; A controller is connected to the oil pressure control module and controls the oil pressure switching circuit to switch to supply a high oil pressure to the oil pressure cylinder, so that the spindle mechanism clamps the workpiece with high pressure to perform the first process, and switches to supply a low oil pressure to the oil pressure cylinder, so that the spindle mechanism clamps the workpiece with low pressure to perform the second process.

2. The workpiece clamping control system for a processing machine according to claim 1, characterized in that: The oil pressure switching circuit includes a switching control valve, a clamping control valve, a releasing control valve and a throttle valve, wherein the switching control valve is controlled by the controller to switch between high oil pressure and low oil pressure, and controls the oil supply clamping or oil return release of the oil pressure cylinder through the clamping control valve and the releasing control valve, and the throttle valve controls the rapid oil return of the oil pressure cylinder.

3. The workpiece clamping control system for a processing machine according to claim 2, characterized in that: The oil pressure switching circuit further includes a flow limiting valve, which provides the oil pressure switching circuit with a flow limit to control the oil pressure cylinder to maintain stable switching.

4. The workpiece clamping control system for a processing machine according to claim 2, characterized in that: The oil pressure switching circuit further includes a high-pressure adjustment rod and a low-pressure adjustment rod connected to the switching control valve. The high-pressure adjustment rod corresponds to adjusting the high oil pressure supplied by the oil pressure cylinder to the spindle mechanism, and the low-pressure adjustment rod corresponds to adjusting the low oil pressure supplied by the oil pressure cylinder to the spindle mechanism.

5. The workpiece clamping control system for a processing machine according to claim 4, characterized in that: The oil pressure control module can switch between high and low pressures in a range of 5 to 30 kg / cm 2 .

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