CN102284908B - Automatic clamping and unloading device of dual-end face grinder - Google Patents

Abstract

The invention discloses an automatic clamping and unloading device for a double-end surface grinding machine, which is characterized in that it comprises a turntable, a fixed disk and several loading fixtures arranged on the turntable at annular intervals, and the charging fixture includes a A pressure block and a connecting rod, one end of the connecting rod is fixedly connected to the pressure block, a first arc cam and a second arc cam are arranged on one surface of the fixed plate, and the gap between the first arc cam and the second arc cam is fixed. An arc cam groove is formed, a bearing is installed at one end of the connecting rod, and one end of the bearing is installed in the arc cam groove, and the bearing is in rolling contact with the first arc cam and the second arc cam; the present invention drives The reciprocating movement of the connecting rod along the radial direction of the turntable can realize the feeding and withdrawal of the pressing block according to the trajectory, so as to realize the clamping and loosening of the workpiece, so as to realize the automatic clamping and unloading of the workpiece of the double-end grinding machine. The invention has a structure Simple, reliable features.

Description

An automatic clamping and unloading device for a double-end grinding machine

technical field

The invention relates to an automatic clamping and unloading device, in particular to an automatic clamping and unloading device for a double-end grinding machine.

Background technique

As we all know, the compressor is the heart of refrigeration equipment and an essential core component in the production of air conditioners. China is the largest market for air conditioners in the world. It is predicted that the annual sales of air conditioners will be around 35 million units in the future. In the past year, the household air-conditioning market has achieved brilliant results, which of course has also led to the continuous prosperity of the air-conditioning compressor market. In 2010, the air-conditioning compressor companies can be described as busy and happy. Although the production is busy, let the compressor companies rest Hours were drastically reduced and had to work overtime frequently.

As for the key component in the compressor manufacturing industry --- the sliding vane, the sliding vane in the sliding vane compressor must be required to be wear-resistant, high in hardness, high in precision of the substrate, and have strict requirements on external dimensions due to the particularity of the use environment. Here, we first understand the main grinding process of sliding vane grinding:

Step 1: Grind the six planes of the slide with a plane grinder, see the light and reserve a margin of more than 0.02mm on one side of both ends, more than 0.03mm on one side of both sides, and 0.06mm on one side of the two top surfaces above.

Step 2: Use an external cylindrical grinder to carry out the process based on two pairs of front and back sides, and roughly grind the bottom surface of R to reserve 0.06mm allowance.

Step 3: Use a vertical double-end surface grinding machine to grind the two front and back sides to control the size to ±0.001mm, and the parallelism of the two planes to 0.001mm.

Step 4: Use a plane grinder to semi-finish both sides with the front and back sides as the reference, keep the verticality within 0.005mm, and reserve 0.015mm grinding allowance on one side.

Step 5: Use 3894 grinding machine with grinding paste to grind the vertical surfaces on both sides at the same time, remove the traces of the grinding wheel to ensure the smoothness of the two sides, the dimension error is within 0.002mm, and the verticality is within 0.004mm.

Step 6: Use the cylindrical grinding machine to fine-grind the R surface to ensure that the dimensional accuracy is within ±0.02mm based on the front and side of the slide.

Step 7: Use the 3894 grinder again to grind both sides, and the grinding amount is between 0.5um and 1um to deburr.

Process 8: Subsequent deburring, cleaning, inspection, temperature setting, classification and other processes. This subsequent process has little connection with this project and is omitted here.

From the above processes of grinding slides, it can be seen that multiple processes are required to complete the grinding of slides. Among them, there are as many as three processes for grinding the two sides of the slide. The grinding time of both sides greatly restricts the overall production efficiency of the slide. . And after grinding the two sides, the processing of the subsequent process will affect the accuracy of the two measuring surfaces, so the ideal state is to grind the two measuring surfaces at the end, so as to avoid the deformation of the two sides caused by clamping or heating in the subsequent grinding of the slide. Cause repeated grinding or even scrapping of the workpiece. According to the current domestic processing methods and processes, a production line can reach a production capacity of 200,000 pieces per month.

In addition, the above-mentioned 3894 type grinding machine is a special reciprocating grinding machine, and its working principle is to apply the grinding paste on two abrasive materials with high flatness and parallelism, so that the sliding plate continuously reciprocates between the two parallel abrasive materials. , by pre-pressing it, the grinding paste is used to grind a small amount of the sliding plate. The amount of grinding can only be ground by the operator through a lot of practice. There is no standard grinding amount, so the level of the operator is high. It is not easy to popularize, and the working efficiency of the machine tool is not high. In foreign countries where the research on compressors started early, a special grinding machine has been developed for the two measurements of the grinding slide. By using the bottom surface and both ends of the slide R as the grinding reference plane, the two measurements are simultaneously ground, and the grinding As the last process of grinding the two measuring surfaces, the efficiency of grinding the two measuring surfaces is greatly improved. However, because the difficulty of machine tool assembly is directly proportional to the processing efficiency and the control of machine tool sales by machine tool manufacturers, the grinding efficiency of the grinding machines produced by domestic companies such as Japan Koyo Company and South Korea HBM Company is controlled at 300,000 pieces per month for one machine tool. processing efficiency. This processing efficiency still fails to meet the demand for ultra-large quantities of slides on the market. In order to improve the processing quality and efficiency of the sliding vane, reduce the production cost of the sliding vane, improve the working reliability of the compressor vane, and meet the huge demand for the sliding vane in the market, the applicant has developed a high-efficiency double-end grinding machine, which Two parallel end faces with high precision and low surface roughness can be processed in one stroke. The machine tool has a high degree of automation. The machine tool can automatically complete workpiece automatic clamping, automatic positioning, automatic grinding, automatic online detection, automatic correction of grinding errors, Automatic unloading, only need to arrange one operator to complete the operation of more than 10 machine tools, which greatly saves the investment of personnel and reduces human operation errors. The labor cost of slide grinding is greatly reduced, and the qualified rate of products is improved.

In order to cooperate with the double-end grinding machine to realize the above functions, the applicant has developed an automatic clamping and unloading device for the double-end grinding machine.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides an automatic clamping and unloading device for a double-end grinder, through which the automatic clamping and unloading device of the double-end grinder can realize the automatic clamping and unloading of the workpiece of the double-end grinder. Clamping and unloading.

The technical solution adopted by the present invention to solve its technical problems is:

An automatic clamping and unloading device for a double-end grinding machine, characterized in that it includes a turntable, a fixed disk and a number of loading fixtures arranged on the turntable at annular intervals, and the charging fixture includes a pressing block and connecting A rod, one end of the connecting rod is fixedly connected with the pressing block, a first arc cam and a second arc cam are arranged on one surface of the fixed plate, and an arc cam is formed between the first arc cam and the second arc cam A bearing is installed at one end of the connecting rod, and one end of the bearing passes through the arc cam groove, and the bearing is in rolling contact with the first arc cam and the second arc cam.

As an improvement of the above-mentioned technical solution of the present invention, several connecting rod guide grooves are provided on the surface of the turntable, and the connecting rods of the charging fixture are located in the corresponding connecting rod guide grooves.

The other end of the connecting rod is connected with a slider, and the slider is installed in the corresponding connecting rod guide groove, and the bearing is installed on the slider.

The beneficial effect of the present invention is: the bearing of the present invention is driven by the turntable in a circular motion in the fixed disk, and the bearing drives the connecting rod to reciprocate along the radial direction of the turntable to realize the feeding and withdrawal of the pressing block according to the track, so as to realize the clamping of the workpiece. Tightening and loosening, so as to realize the automatic clamping and unloading of the workpiece of the double-end grinding machine. The invention has the characteristics of simple structure and reliable operation; and the two-section arc surface of the first arc cam or the second arc cam The smooth arc connection between them can make the transition of the workpiece between clamping and loosening smooth.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is the three-dimensional exploded schematic diagram of the present invention;

Fig. 2 is a three-dimensional exploded schematic diagram of another direction of the present invention;

Fig. 3 is a schematic structure diagram of the present invention.

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3, an automatic clamping and unloading device of a double-end grinding machine disclosed by the present invention includes a turntable 1, a fixed disk 2 and several loading fixtures arranged on the turntable at annular intervals 3.

Wherein, the charging fixture 3 includes a pressing block 31 and a connecting rod 32, one end of the connecting rod 32 is fixedly connected with the pressing block 31, and a first arc cam 21 and a second arc cam 22 are arranged on one surface of the fixed disc 2 , the first arc cam 21 is composed of two arc surfaces with different radii, and the two arc surfaces with different radii are connected by a smooth arc surface. Correspondingly, the second arc cam 22 is also It consists of two arc surfaces with different radii, and the two arc surfaces with different radii are connected by a smooth arc surface. An arc cam groove 23 is formed between the first arc cam and the second arc cam.

As shown in Figure 1, several connecting rod guide grooves 11 are arranged on the surface of the turntable 1, the connecting rod guide grooves 11 are arranged radially along the turntable 1, and the connecting rod 32 of the charging fixture is located in the corresponding connecting rod guide groove 11, Thereby, the reciprocating motion of the connecting rod is smooth and smooth.

The other end of connecting rod 32 is connected with slide block 33, and slide block 33 is installed in the corresponding connecting rod guide groove 11, and bearing 34 is installed on slide block 33, and one end of bearing 34 passes through arc cam groove 23, and The bearing 34 is in rolling contact with the first arc cam 21 and the second arc cam 22. The bearing 34 is driven by the turntable 1 in the fixed plate 2 to move along the arc cam groove, and the bearing drives the connecting rod to reciprocate along the radial direction of the turntable. The movement realizes the feed and withdrawal of the pressing block according to the trajectory, so as to realize the clamping and loosening of the workpiece, so as to realize the automatic clamping and unloading of the workpiece of the double-end grinding machine. And because the two arc surfaces of the first arc cam or the second arc cam are connected by a smooth arc surface, the transition between clamping and loosening of the workpiece can be smooth.

The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments, and the present invention can also have other structural changes, such as bearings can also be directly arranged on the connecting rod, etc. Various equivalent modifications or replacements can also be made by those skilled in the art without departing from the spirit of the present invention, and these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (2)

1. An automatic clamping and unloading device for a double-end grinding machine, characterized in that it includes a turntable, a fixed disk and a number of charging fixtures arranged on the turntable at annular intervals, and the charging fixture includes a pressing block and a connecting rod, one end of the connecting rod is fixedly connected with the pressing block, a first arc cam and a second arc cam are arranged on one surface of the fixed plate, and a circle is formed between the first arc cam and the second arc cam. The arc cam groove, the surface of the turntable is provided with several connecting rod guide grooves, the connecting rod of the charging fixture is located in the corresponding connecting rod guiding groove, the other end of the connecting rod is connected with a slider, and the slider is installed on the corresponding In the guide groove of the connecting rod, a bearing is installed on the slider, and one end of the bearing is passed through the arc cam groove, and the bearing is in rolling contact with the first arc cam and the second arc cam. 2. The automatic clamping and unloading device of a double-end grinding machine according to claim 1, wherein the first arc cam is composed of two arc surfaces with different radii, and the two radii are different The first arc surfaces are connected by smooth arc surfaces; the second arc cam is composed of two arc surfaces with different radii, and the two arc surfaces with different radii are connected by smooth arc surfaces.

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