CN210549848U - Double-cylinder counterweight device of spindle box of vertical machining center - Google Patents
Double-cylinder counterweight device of spindle box of vertical machining center Download PDFInfo
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- CN210549848U CN210549848U CN201921042111.3U CN201921042111U CN210549848U CN 210549848 U CN210549848 U CN 210549848U CN 201921042111 U CN201921042111 U CN 201921042111U CN 210549848 U CN210549848 U CN 210549848U
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Abstract
The utility model relates to a vertical machining center headstock double-cylinder counter weight device is applicable to digit control machine tool, combined machine tool, machining center, specialized lathe and uses. The device comprises a stand column, a left cylinder fixing frame and a right cylinder fixing frame which are arranged on the stand column, a main shaft box body which is arranged on the stand column and vertically moves, and a left balance weight cylinder and a right balance weight cylinder which are connected through a single-lug fixing seat; a square opening is formed in the vertical column from top to bottom, the air storage tank is fixed in the square opening, and the size of the air storage tank is smaller than that of the opening of the vertical column; the air cylinder fixing frames are arranged on the upper end surface of the upright post and are symmetrically distributed left and right, and the air cylinder fixing frames are in pin joint with fisheye joints on an air cylinder rod of the balance weight air cylinder through pin shafts; the cylinder barrel of the balance weight cylinder is connected with a main shaft box of a vertical moving part through a single lug fixing seat and reciprocates up and down along with the main shaft box; the upper end of the air storage tank is provided with a one-way valve, and compressed air is injected into the air storage tank through the one-way valve by air pressure; the spindle box is mounted on a linear guide rail through a sliding block, and the linear guide rail is mounted on the stand column.
Description
Technical Field
The utility model relates to a vertical machining center headstock double-cylinder counter weight device is applicable to digit control machine tool, combined machine tool, machining center, specialized lathe and uses.
Background
The machine tool is an important tool for human production labor and is also an important mark for the development level of productivity. In recent years, with rapid development of science and technology and change of manufacturing environment, a numerical control machining center is widely applied due to strong comprehensive machining capability and high machining precision. The numerical control machining center is generally divided into a horizontal reciprocating motion and a vertical reciprocating motion with respect to the axial motion direction. The horizontal shaft moving component mainly overcomes the friction force to operate; the vertical moving part has different driving force when moving upwards and driving force when moving downwards due to the action of gravity, and if the gravity is not balanced, the motion stability of the part is influenced, and the transmission part always bears the weight of the moving part, so that the single-side abrasion of the transmission part is caused, and the retentivity of the precision of the machine tool is influenced.
At present, in a numerical control machining center, the counterweight on a vertical shaft is mainly performed by the following method: 1. balancing weight, 2, air pressure balancing weight (air cylinder + gas storage barrel), 3, oil pressure balancing weight, 4 and nitrogen balancing weight.
The balance weight method has the following defects: 1. adopt the balancing weight counter weight, the material is cast iron, and is with low costs, bulky, weight is great, and reaction characteristic is poor, is not suitable for high-speed cutting, produces main shaft unit vibrations easily during high-speed motion and influences the machining precision, and the cutter is worn and torn easily. In addition, the balancing weight is relatively troublesome to install and needs to be specially fixed in the transportation process of the equipment.
2. The air pressure balance weight (the air cylinder and the air storage barrel) is adopted, the speed is moderate, the energy consumption is large, the diameters and the volumes of the air cylinder and the air storage barrel are relatively large, the occupied space is large, and the installation is inconvenient.
3. The adoption of the oil pressure balance weight has the problems of moderate speed, insufficient agility in reaction and low precision, the problem of oil pressure rise of an oil pressure loop needs to be solved, a high-precision oil pressure valve is needed, and the pressure cannot be maintained. The equipment needs to provide a hydraulic station, which increases the cost.
4. Adopt nitrogen gas counter weight, the precision is still can, long-time operation, and nitrogen gas runs off easily, can not automatic compensation moreover, and follow-up maintenance cost is high.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art and providing a double-cylinder counterweight device of a spindle box of a vertical machining center, wherein the double-cylinder structure distributed on the left and the right can effectively ensure the balance of the stress of a track; the energy storage gas tank has small volume, low requirement on installation space, strong stability and low maintenance cost; the large-flow precise pressure reducing valve can quickly exhaust and supplement air according to the load change of a moving part, adjust the balance force in real time, has quick response and high speed, greatly improves the repeated precision of moving parts, and can better realize the high-speed and high-precision machining of a machine tool.
The utility model provides a technical scheme that its technical problem adopted is:
a double-cylinder counterweight device of a spindle box of a vertical machining center comprises a stand column, a left cylinder fixing frame, a right cylinder fixing frame, a spindle box body, a left counterweight cylinder and a right counterweight cylinder, wherein the left cylinder fixing frame and the right cylinder fixing frame are arranged on the stand column, the spindle box body is arranged on the stand column and vertically moves, and the left counterweight cylinder and the right counterweight cylinder are connected.
The stand is grey cast iron material, and inside is from last to being equipped with the cubic opening down, and the inner wall is equipped with the strengthening rib, and the gas holder is fixed in the cubic opening, and its volume is 6 liters, and the gas holder is less than stand opening size.
The cylinder fixing frames are arranged on the upper end face of the upright post and are distributed in bilateral symmetry. The cylinder fixing frame is in pin joint with a fisheye joint on a cylinder rod of the balance weight cylinder through a pin shaft.
The cylinder barrel of the balance weight cylinder is connected with a main shaft box of a vertical moving part through a single lug fixing seat and reciprocates up and down along with the main shaft box, and a fisheye joint arranged at the head of a cylinder rod is in pin joint with a cylinder fixing frame through a pin shaft.
The air storage tank is 6 liters in volume, the upper end of the air storage tank is provided with a one-way valve, and compressed air is injected into the air storage tank through the one-way valve by air pressure. One end of the large-flow precision pressure reducing valve is connected with the gas storage tank through a gas pipe, and the other end of the large-flow precision pressure reducing valve is connected with a gas inlet at the upper end of the counterweight cylinder through a gas pipe.
The main shaft box is made of cast iron and is installed on the linear guide rails through the sliding blocks, the linear guide rails are installed on the stand columns, 3 sliding blocks are installed on each linear guide rail, and the main shaft box body drives the counterweight cylinder barrel to reciprocate up and down along the linear rails.
The working principle is as follows: the main shaft box body reciprocates up and down on the upright post along the linear guide rail, the left and the right of the main shaft box body are respectively provided with a counterweight cylinder, and the counterweight cylinder is connected with the main shaft box body and reciprocates up and down along with the main shaft box; a cylinder rod of the balance weight cylinder is fixed on a cylinder fixing frame through a pin shaft, and the cylinder fixing frame is arranged on the upper end surface of the upright post; the fisheye joint and the single-lug fixing seat are used for eliminating errors during installation of the counterweight cylinder and ensuring the freedom degree of movement of the counterweight cylinder. The balance force of the balance weight cylinder can be adjusted by adjusting the pressure of the large-flow precision pressure reducing valve, and the balance weight cylinder can be subjected to air pressure balance weight in time according to the required balance force in the operation process.
The beneficial effect of this device is: the device adopts double cylinders to balance the balance force generated by the vertical motion of the spindle box, and the used gas storage tank has small volume, convenient installation, no leakage of unidirectional gas inlet, strong stability and low maintenance cost; the high-flow precision pressure reducing valve with the meter can adjust the magnitude of the balance weight at any time according to the load, has the advantages of high air supplementing and exhausting speed, sensitive response, high repetition precision, low noise, energy conservation and environmental protection; the left and right balance weights enable the main shaft box to be more balanced in stress and more stable, abrasion of the linear guide rail and the ball screw is reduced to the greatest extent, heat productivity of the servo motor in long-term operation is reduced, positioning and repetition precision of the ball screw are improved, and the spindle box is suitable for high-precision high-speed machining.
Drawings
The invention will be further explained with reference to the drawings, in which:
fig. 1 is a schematic diagram of a load balancing gas circuit of a double-cylinder counterweight device of a spindle box of a vertical machining center.
Fig. 2 is a sectional view of a structure of a double-cylinder counterweight device of a spindle box of a vertical machining center.
Fig. 3 is a schematic view of the mounting structure of a double-cylinder counterweight device of a spindle box of a vertical machining center.
In the figure: 1. the device comprises a check valve, 2, a gas storage tank, 3, a large-flow precision pressure reducing valve, 4, a fisheye joint, 5, a balance weight cylinder, 6, a cylinder rod, 7, a single lug fixing seat, 8, a cylinder fixing frame, 9, a stand column, 10, a linear guide rail, 11 and a spindle box.
Detailed Description
Referring to the attached figures 1-3, the double-cylinder counterweight device of the spindle box of the vertical machining center comprises a vertical column (9), a left cylinder fixing frame and a right cylinder fixing frame (8) which are arranged on the vertical column, a spindle box body (11) which is arranged on the vertical column and vertically moves, and a left counterweight cylinder and a right counterweight cylinder (5) which are connected through a single lug fixing seat (7).
The stand is grey cast iron material, and inside is from last to being equipped with the cubic opening down, and the inner wall is equipped with the strengthening rib, and gas holder (2) are fixed in the cubic opening, and its volume is 6 liters, and the gas holder is far less than stand opening size.
The cylinder fixing frames (8) are arranged on the upper end face of the upright post (9) and are distributed in bilateral symmetry. The cylinder fixing frame (8) is connected with a fisheye joint (4) on a cylinder rod (6) of the balance weight cylinder (5) through a pin shaft.
The cylinder barrel of the balance weight cylinder (5) is connected with a main shaft box (11) of a vertical moving part through a single lug fixing seat (7) and reciprocates up and down along with the main shaft box, and a fisheye joint (4) arranged at the head of a cylinder rod (6) is in pin joint with a cylinder fixing frame (8) through a pin shaft.
The volume of the air storage tank (2) is 6 liters, the upper end of the air storage tank is provided with a one-way valve (1), and compressed air is injected into the air storage tank (2) through the one-way valve (1) by air pressure. One end of the large-flow precision reducing valve (3) is connected with the gas storage tank (2) through a gas pipe, and the other end of the large-flow precision reducing valve is connected with a gas inlet at the upper end of the counterweight cylinder (5) through a gas pipe respectively.
The main shaft box (11) is made of cast iron and is installed on a linear guide rail (10) through a sliding block (8), the linear guide rail (10) is installed on a stand column (9), 3 sliding blocks (8) are installed on each linear guide rail, and the main shaft box (11) drives a counterweight cylinder barrel to reciprocate up and down along a linear track.
In the technical scheme, a special counterweight air valve can be selected to replace a high-flow precision pressure reducing valve, the cost is high, and the high-flow precision pressure reducing valve related in the scheme is SMC VEX1333 series; the large-volume air storage tank can be used for replacing the small-volume air storage tank involved in the scheme, and the installation and the transportation are troublesome.
The principle of the design of the technical scheme is shown in the attached figure 1; the attached table shows that the counterweight cylinder generates the counterweight force as follows:
and correspondingly selecting the size of the balance weight cylinder according to the balance force required by the main spindle box body.
Claims (6)
1. A double-cylinder counterweight device of a spindle box of a vertical machining center is characterized by comprising a stand column, a left cylinder fixing frame and a right cylinder fixing frame which are arranged on the stand column, a spindle box body which is arranged on the stand column and vertically moves, and a left counterweight cylinder and a right counterweight cylinder which are connected through a single lug fixing seat; a square opening is formed in the vertical column from top to bottom, and the air storage tank is fixed in the square opening and is smaller than the size of the vertical column opening; the air cylinder fixing frames are arranged on the upper end surface of the upright post and are symmetrically distributed left and right, and the air cylinder fixing frames are in pin joint with fisheye joints on an air cylinder rod of the balance weight air cylinder through pin shafts; the cylinder barrel of the balance weight cylinder is connected with a main shaft box of a vertical moving part through a single lug fixing seat and reciprocates up and down along with the main shaft box, and a fisheye joint arranged at the head of a cylinder rod is in pin joint with a cylinder fixing frame through a pin shaft; the upper end of the air storage tank is provided with a one-way valve, and compressed air is injected into the air storage tank through the one-way valve by air pressure; one end of the high-flow precision pressure reducing valve is connected with the gas storage tank through a gas pipe, and the other end of the high-flow precision pressure reducing valve is respectively connected with a gas inlet at the upper end of the counterweight cylinder through a gas pipe; the main shaft box is installed on a linear guide rail through a sliding block, the linear guide rail is installed on a stand column, and the main shaft box body drives the counterweight cylinder barrel to reciprocate up and down along the linear track.
2. The double-cylinder counterweight device for the main spindle box of the vertical machining center according to claim 1, wherein the volume of the air storage tank is 6 liters.
3. The double-cylinder counterweight device for the spindle box of the vertical machining center according to claim 1, wherein the upright column is made of gray cast iron, and reinforcing ribs are arranged on the inner wall of the upright column.
4. The dual-cylinder counterweight device for the spindle box of the vertical machining center according to claim 1, wherein the volume of the air storage tank is 6 liters, which is much smaller than the size of the opening of the column.
5. The double-cylinder counterweight device for the spindle box of the vertical machining center according to claim 1, wherein the spindle box is made of cast iron.
6. The double-cylinder counterweight device for the main spindle box of the vertical machining center according to claim 1, wherein 3 sliding blocks are mounted on each linear guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921042111.3U CN210549848U (en) | 2019-07-05 | 2019-07-05 | Double-cylinder counterweight device of spindle box of vertical machining center |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921042111.3U CN210549848U (en) | 2019-07-05 | 2019-07-05 | Double-cylinder counterweight device of spindle box of vertical machining center |
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| CN210549848U true CN210549848U (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216518A (en) * | 2019-07-05 | 2019-09-10 | 南京欧创机电有限公司 | A kind of double cylinder counter weight devices of headstock in vertical machining center |
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2019
- 2019-07-05 CN CN201921042111.3U patent/CN210549848U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216518A (en) * | 2019-07-05 | 2019-09-10 | 南京欧创机电有限公司 | A kind of double cylinder counter weight devices of headstock in vertical machining center |
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