CN201427274Y - multistage variable-speed milling and grinding machine - Google Patents

Abstract

The utility model relates to a multi-stage variable-speed milling machine. An electrical control system is composed of a programmable controller (20), a frequency converter (18), a servo control module (19) and a man-machine interface (17) to change the spindle speed. , the milling and grinding process is divided into three stages: coarse grinding, fine grinding, and finishing. According to the machining allowance and material of the workpiece, the machining allowance for rough grinding and fine grinding is allocated, and the workpiece speed in the rough, fine grinding, and finishing stages is set at the same time, which solves the problem of using only one speed in the prior art for the milling and grinding of the workpiece. Due to the problems of slow processing speed and poor precision, the utility model can improve the processing efficiency, reduce the chrysanthemum pattern on the glass surface, and improve the surface precision of parts.

Description

Multi-stage variable speed milling machine

technical field

The utility model belongs to milling and forming processing equipment for workpieces, in particular to a multi-stage variable speed milling machine, which is suitable for spherical or plane deep processing industries of brittle and hard materials (such as optical glass, sapphire, engineering ceramics, etc.) and other material processing fields , mainly used for concave-convex spherical and plane processing.

Background technique

The milling machine is one of the most important equipment in the spherical or plane deep processing equipment such as glass. With the continuous development and growth of the glass deep processing industry, the market demand for the milling machine is also increasing, especially for the processed The precision of the chrysanthemum pattern on the surface of the product is more stringent. The problems in the existing technology: the existing spherical milling technology in China is that the workpiece shaft adopts a rotating speed to realize the milling of the workpiece. This technology has slow processing speed and low precision. Difference.

Contents of the invention

In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a new type of milling machine, which realizes segmented grinding at different speeds, so as to improve product precision and work efficiency.

In order to achieve the above object, the utility model adopts the following technical solutions: a multi-stage variable speed milling machine, including a variable speed motor, a gear pair, a workpiece spindle, a grinding wheel and an electrical control system, which is characterized in that the hardware of the electrical control system is programmed The controller, frequency converter, servo control module and human-machine interface are composed of a combination, and its functional relationship is: through the human-machine interface, input the relevant process parameters of the rough grinding stage, fine grinding stage, and finishing stage, and the programmable controller calculates the relevant process The parameters control the frequency converter and the servo control module, and then drive the variable speed motor and the servo motor respectively. Through the transmission of the gear pair, the workpiece to be processed can obtain the set rotation speed. Get the set feed rate.

In the three grinding stages of rough grinding, fine grinding and finishing, the speed of driving the variable speed motor can be set to three different speeds.

The utility model provides a brand-new workpiece spindle mechanism and electrical control system, namely: through the electrical control system and the spindle structure to change the spindle speed and cutting feed speed, according to the brittle and hard materials (such as optical glass, sapphire, engineering ceramics, etc.) ) cutting mechanism, that is, under the action of diamond abrasive grains, when the cutting depth and cutting feed rate are large, brittle and hard materials produce hoof-shaped cracks, and many cracks intersect each other, making the chips peel off the matrix in powder form; when When the cutting depth and cutting feed rate are both small, the brittle and hard materials will not crack, and only smooth micro-plastic grooves will be formed. The milling process of the product is divided into three stages: rough grinding, fine grinding, and finishing; according to the processing of the product Allowance and material to allocate rough grinding and fine grinding processing allowance, while setting the rough grinding, fine grinding, finishing stage workpiece speed and cutting feed rate, the finishing stage is set to further improve the surface finish and precision of the product , it can be set to no glass allowance or micro cutting allowance. In general, it can be set that the rough grinding stage has a large machining allowance, the workpiece speed is high, and the cutting feed rate is fast to improve efficiency; Improve the surface finish and surface accuracy; the speed of the workpiece in the finishing stage is lower than that of the fine grinding speed, with a small or no cutting allowance to further improve the surface finish and surface accuracy; these three grinding stages, three different The grinding method of the workpiece rotation speed and cutting speed improves the processing efficiency, and at the same time improves the surface accuracy and smoothness of the parts.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic circuit diagram of the utility model.

Detailed ways

The specific embodiment of the utility model is described in detail below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, the grinding process of the product is as follows: the variable speed motor 1 installed on the bedside box is driven by the gear pair 2 and 12 to drive the magazine 6 and the processed part 7 to rotate; The servo motor 16 on the 15 makes the workpiece main shaft 5, the clip 6 and the processed part 7 realize axial movement through the ball screw rod 9, and it is ground by the emery wheel 8. The variable speed motor 1 is preferably a gear reduction motor, the Hall switch 4 controls the right limit position, and the Hall switch 11 controls the left limit position.

Before work, determine the machining allowance according to the rough size and final size requirements of the product and carry out equipment debugging, allocate rough grinding and fine grinding allowances according to the machining allowance, and input rough and fine grinding allowances and equipment on the man-machine interface 17 Relevant parameters such as workpiece speed, feed speed, and number of grinding circles in the idle stroke operation, rough grinding stage, fine grinding stage, and finishing stage, these parameter instructions are calculated by the programmable controller 20 to complete the equipment debugging process. During work, the start button sends instructions to the servo control module 19 to drive the servo motor 16 through the programmable controller 20, and the mounting plate 10, the workpiece main shaft 5, the cartridge 6, and the processed parts 7 are driven by the ball screw 9. The mechanical zero position controlled by the Hall switch 3 is quickly fed to the position of the grinding wheel, and the variable speed motor 1 is automatically started according to the coarse grinding speed set by the frequency converter 18, and the magazine 6 and the processed part 7 are driven to rotate through the gear pair 2 and 12, and the grinding wheel 8. Grind the workpiece and enter the coarse grinding stage. After the relevant parameters set in the rough grinding stage are executed, the servo control module 19 issues an instruction to change the speed of the servo motor 16, and the frequency converter 18 issues an instruction to change the speed of the variable speed motor 1. speed, so that the workpiece enters the fine grinding stage at different speeds and feed speeds. When the set fine grinding allowance and the number of laps of fine grinding are completed, the frequency converter 18 issues an instruction to change the speed of the variable speed motor 1, so that the workpiece enters the fine grinding stage at different speeds. In the finishing stage, when the set number of finishing turns is completed, the variable speed motor stops, and the servo motor 16 drives the workpiece to quickly move rightward to the mechanical zero position through the ball screw 9, and the workpiece spindle 5 continues to move backward when the button is pressed. When the ejector rod 13 hits the limit screw 14 and has a small amount of compression, the magazine 6 automatically expands, removes the processed parts, and then presses the button, the workpiece axis automatically returns to the mechanical zero position, and the equipment completes the processing of a part. The processing cycle also realizes three different workpiece rotation speeds and cutting speeds in the three grinding stages, which greatly improves the processing efficiency and improves the surface accuracy and smoothness of the parts.

Claims (3)

1. A multi-stage variable speed milling machine, comprising a variable speed motor (1), a gear pair (2, 12), a workpiece spindle (5), an emery wheel (8) and an electrical control system, characterized in that the hardware of the electrical control system consists of The programmable controller (20), the frequency converter (18), the servo control module (19) and the human-machine interface (17) are composed of a combination, and its functional relationship is: input the coarse grinding stage and the fine grinding stage 1. Relevant process parameters in the finishing stage, the programmable controller (20) calculates the relevant process parameters to control the frequency converter (18), the servo control module (19), and then drives the variable speed motor (1) and the servo motor (16) respectively, Through the transmission of the gear pair (2, 12), the processed part (7) can obtain the set rotation speed, and the workpiece spindle (5) can be driven to move axially through the ball screw (9), so that the processed part (7) can be obtained set feed rate. 2. The multi-stage variable speed milling machine according to claim 1, characterized in that the speed of driving the variable speed motor (1) is divided into three stages. 3. The multi-stage variable speed milling machine according to claim 1, characterized in that the variable speed motor (1) is a gear reduction motor.

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