Method and device for prolonging service life of bearing of heavy tool rest by using high-pressure water flow

Abstract

The invention discloses a method and device for prolonging the service life of a bearing of a heavy tool rest through high-pressure water flow and belongs to the technical field of machining. A water flow injection system device is arranged and comprises a water pump, a hose, a nozzle, a small motor, a gear and rack transmission mechanism and the like. Comprising the following steps that a hose and a nozzle are arranged in a clamp gap, one side of the hose is connected with the nozzle, the other side of the hose is connected with a water pump, and the nozzle and the hose are fixed to a following device; the following device comprises a small motor and a gear rack. The moving direction of the following device is opposite to that of the moving table, the moving speed is equal to that of the moving table, and water flow is compressed by the water pump, flows to the nozzle through the hose and is sprayed to the fixed position of the boring tool rest, so that overlarge torque caused by overlarge overall mass of the tool rest is reduced, torque borne by a bearing is reduced, and loss is reduced. The device can effectively prolong the service life of the heavy tool rest bearing, and has wide application prospects.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology processing, and relates to a method and a device for improving the bearing life of a heavy tool holder by using high-pressure water flow. Background Art

[0002] In modern engineering machinery, bearings are key components of rotating mechanical equipment and are also one of the most easily damaged key components. Their reliability directly affects the stable operation of the entire system. Once the bearing is damaged, it will lead to failure and shutdown of the mechanical system, thereby reducing the reliability of the entire system. According to statistics, mechanical failures caused by bearing damage account for 40%.

[0003] The development of the equipment manufacturing industry has put forward higher and higher requirements on the service life of bearings, so improving the service life of rolling bearings has always been the focus of research. Before the improvement of the present invention, due to the particularity of the boring tool processing, the mass of the tool holder was too large, the torque generated when processing parts was too large, the bearing loss was serious, the service life of the bearing was reduced, and the production efficiency was seriously affected.

[0004] Therefore, the research and development of a method and device for increasing the bearing life of a heavy tool holder based on the application of high-pressure water flow has become an important way to solve the above problems. By spraying high-pressure water flow upward to a fixed position of the tool holder, the torque generated by the water flow pressure is balanced with the torque generated by the weight of the tool holder, thereby reducing the torque on the bearing, reducing bearing loss, and increasing the bearing life. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a method and device for improving the bearing life of a heavy tool holder by using high-pressure water flow. The present invention provides a method and device for improving the bearing life of a heavy tool holder by using high-pressure water flow, and the method comprises the following steps:

[0006] Step 1) placing an arc-shaped stainless steel frame in a large gap between the workpiece and the fixture;

[0007] Step 2) The nozzle is connected to the hose and installed together on a stainless steel frame;

[0008] Step 3) The device is equipped with a small motor, which supplies energy to the rack-and-pinion mechanism, and the steel frame is fixed to the rack-and-pinion mechanism to generate axial movement;

[0009] Step 4) The device is equipped with a water pump, which is connected to a hose and sprays high-pressure water through a nozzle;

[0010] Step 5) The high-pressure water flow is then sprayed to the fixed position of the tool holder, so that the boring tool as a whole generates an upward force when processing the part, thereby reducing the impact of excessive torque caused by the excessive mass of the tool holder on the bearing loss.

[0011] According to the above scheme, in step 1), the method and device for using high-pressure water flow to improve the bearing life of a heavy tool holder are characterized in that in step 1, the arc-shaped steel frame is as thin as possible and close to the inner arc of the clamp body, and the curvature of the steel frame should be greater than 90 degrees.

[0012] According to the above scheme, in step 2), the nozzles should be arranged at a quarter arc position below the steel frame, with 5 nozzles arranged symmetrically, with a distance of 22.5 degrees between each nozzle.

[0013] According to the above scheme, in step 3), the gear rack mechanism should be connected to the steel frame for uniform axial movement, which is equal to the movement speed of the mobile platform and opposite to the direction.

[0014] According to the above scheme, in step 4), as the mobile platform feeds, the steel frame retreats at the same speed, so the high-pressure water jet is sprayed at the rightmost fixed position of the tool holder, and the tool holder is always subjected to an upward force.

[0015] According to the above scheme, in step 5), after consulting the design drawings, the mass of the boring tool holder is 642kg, and the overall dimensions of the tool holder are known. In order to reduce the impact of the torque on the bearing, thereby affecting the service life of the bearing, a high-pressure water flow is used to balance the gravity of the tool holder. According to the torque balance condition, it is calculated that each nozzle needs to spray 0.6MPa of high-pressure water flow, and the nozzle and water pump are selected according to the water flow pressure.

[0016] The beneficial effects produced by the present invention are:

[0017] The present invention installs a mobile follow-up water spraying device in the remaining space between the fixture and the workpiece. After the water pump is working, the water flows to the nozzle through the water delivery hose, and the nozzle sprays out a high-pressure water flow. With the axial feeding of the fixture moving table, the high-pressure water flow is fixedly sprayed at the rightmost position of the tool holder, so that the tool holder always receives an upward force to balance the gravity of the tool holder.

[0018] Compared with the process before the improvement, when the boring tool processes parts, the torque on the bearing matched with the shaft connected to the tool holder is reduced, thereby increasing the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 A schematic diagram of the numbering of a boring tool processing device according to an embodiment of the present invention

[0021] Figure 2 This is a cross-sectional view of the steel frame and nozzle installation of an embodiment of the present invention

[0022] Figure 3 It is the overall framework flow chart of the embodiment of the present invention; DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0025] like Figure 1 As shown, a method and device for improving the bearing life of a heavy tool holder by using high-pressure water flow based on the present invention includes the following steps:

[0026] Step 1) Arrange the stainless steel sheet 5 in the space between the processed part 7 and the fixture 8

[0027] Step 2) Install the water hose and nozzle 4 on the stainless steel sheet 5

[0028] Step 3) The stainless steel sheet 5 is connected to the rack and pinion mechanism, and the rack and pinion mechanism is connected to the small motor.

[0029] Step 4) Spindle 1 starts to run, and the boring tool processes the workpiece.

[0030] Step 5) The moving table drives the fixture 8 to feed axially. Since the motor drives the gear rack to move axially, and the speed is equal to and opposite to that of the moving table, the stainless steel sheet is stationary relative to the tool holder.

[0031] Step 6) After the water flow is compressed by the water pump, the water flow flows through the hose to the nozzle 4, and the nozzle 4 sprays the water flow and fixes it to the rightmost position 6 of the tool holder.

[0032] Step 7) When the boring tool is processing the part, the spindle 1 rotates in a circle, driving the tool holder 2 to rotate, thereby driving the boring tool body 3 to rotate. After the tool body rotates, the part begins to be processed. Since the fixture is axially fed with the moving table, the entire surface processing of the part can be completed.

[0033] Step 8) Since the steel sheet 5 and the fixture move in the same direction but in the opposite direction, the high-pressure water jet from the nozzle 4 is fixedly sprayed to the right side of the tool holder 6, so that the tool holder is always subjected to a force perpendicular to the tool axis during the machining process, and the torque on the bearing in 1 is reduced, thereby increasing the bearing life.

[0034] like Figure 1 and Figure 2As shown, 5 nozzles are arranged on the steel frame, each nozzle is spaced 22.5 degrees apart, and the arc formed by the 5 nozzles is a quarter of the circumference. A nozzle is arranged directly below. According to this arrangement method, the horizontal components of force received at the rightmost point 6 of the tool holder cancel each other out, so that the torque generated by the vertical component of force and the torque generated by the weight of the tool holder cancel each other out, thereby reducing the torque received by bearing 1 and improving its service life.

[0035] Since the mass of the tool holder is known to be 642 kg, the dimensions of the tool holder can also be found in the design drawings. According to this method, it is calculated that the water pressure of each nozzle is equal to 0.6 MPa.

Claims

1. A method and device for increasing the bearing life of a heavy tool holder by using high-pressure water flow, characterized in that The steps include: Step 1) placing an arc-shaped stainless steel frame in a large gap between the workpiece and the fixture; Step 2) The nozzle is connected to the hose and installed together on a stainless steel frame; Step 3) The device is equipped with a small motor, which supplies energy to the rack-and-pinion mechanism, and the steel frame is fixed to the rack-and-pinion mechanism to generate axial movement; Step 4) The device is equipped with a water pump, which is connected to a hose and sprays high-pressure water through a nozzle; Step 5) The high-pressure water flow is then sprayed to the fixed position of the tool holder, so that the boring tool as a whole generates an upward force when processing the part, thereby reducing the impact of excessive torque caused by the excessive mass of the tool holder on the bearing loss.

2. A method and device for increasing the bearing life of a heavy tool holder by using high-pressure water flow according to claim 1, characterized in that: In step 1, the arc-shaped steel frame is as thin as possible and close to the inner arc of the clamp body, and the curvature of the steel frame should be greater than 90 degrees.

3. A method and device for increasing the bearing life of a heavy tool holder by using high-pressure water flow according to claim 1, characterized in that: In step 2, the nozzles should be arranged at a quarter arc position below the steel frame, with 5 nozzles arranged symmetrically, and the distance between two nozzles is 22.5 degrees.

4. A method and device for increasing the bearing life of a heavy tool holder by using high-pressure water flow according to claim 1, characterized in that: In step 3, the rack and pinion mechanism should be connected to the steel frame to move axially at a uniform speed, which is equal to the movement speed of the mobile platform and opposite to the direction.

5. A method and device for increasing the bearing life of a heavy tool holder by using high-pressure water flow according to claim 4, characterized in that: As the moving platform feeds, the steel frame retreats at the same speed, so the high-pressure water jet is sprayed at the rightmost fixed position of the tool holder, and the tool holder is always subjected to an upward force.

6. A method and device for increasing the bearing life of a heavy tool holder by using high-pressure water flow according to claim 1, characterized in that: In step 5, after consulting the design drawings, the mass of the boring tool holder is 642kg. It is calculated that each nozzle needs to spray 0.6MPa high-pressure water flow. Taking this as an example, the nozzle and water pump are selected according to the water flow pressure.

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