Rapid screening method for sliding block steel balls and tool block for screening

Abstract

The invention relates to the technical field of slide block measurement and model selection, in particular to a slide block steel ball rapid screening method, a tool block and a calibration block are prepared, the outer contour of the tool block is completely consistent with the size after a standard track and target value steel balls are combined, and a plurality of secondary gas channels are formed in the tool block; the plurality of secondary gas channels are respectively opposite to the plurality of channels on the calibration block, and the calibration block is a sliding block and is matched with the tool block for use to obtain a judgment reference of a steel ball mounting gap; the calibration block and the to-be-measured sliding block are sequentially installed on the tool block, ventilation is conducted on the multiple secondary gas channels through the pneumatic measuring instrument, the gas supply pressure is measured, the gap h (mesh) between the tool block and the upper channel of the calibration block and the gap h (real) between the to-be-measured sliding block and the upper channel of the calibration block are judged through the gas supply pressure, and therefore the size of the assembled steel ball is obtained. The tool block is designed, a pneumatic gauge is adopted to directly read a pressure signal to calculate the channel spacing, the detection time can be greatly shortened, and on-site rapid application is facilitated.

Description

Technical Field

[0001] This application relates to the field of slider measurement and selection technology, and in particular to a rapid screening method for slider steel balls and a screening tooling block. Background Technology

[0002] A ball linear guide assembly mainly consists of a slider, a track, steel balls, and other components. During assembly, the interference fit of the ball linear guide assembly is typically adjusted using the balls.

[0003] Even minute changes in the ball diameter can significantly alter the interference fit of the ball bearing guide pair, thus affecting its overall performance. During assembly, by selecting steel balls of different diameters to match the grooves on the slider and the track, the preload level between the slider and the track can be precisely controlled: a larger diameter increases the interference fit, improving system rigidity and positioning accuracy, but also increases friction, leading to increased running resistance and accelerated temperature rise; a smaller diameter may result in gaps, causing vibration and noise, and reducing repeatability.

[0004] Proper ball diameter configuration can extend guideway life, reduce downtime for maintenance, and directly lower operating costs. A ball design that matches the load can also improve energy efficiency, reduce drive power consumption, and align with industrial energy conservation trends.

[0005] Existing methods for selecting slider channels and steel balls mostly employ coordinate measuring machines (CMMs). During CMM testing, the slider and guide rail channels need to be measured separately, and the arc shapes of the four channels on the slider and the four channels on the guide rail need to be fitted separately. The radius r1 of each channel, the center distance between the four channels on the slider, and the center distance between the four channels on the guide rail are then obtained. The measurement process is cumbersome and time-consuming, the fitting process is complex, and the measurement and selection efficiency is low. Summary of the Invention

[0006] The technical problem this invention aims to solve is that existing methods for selecting slider steel balls are inefficient.

[0007] Therefore, the present invention provides a method for rapid screening of sliding steel balls, and a tooling block for rapid screening of sliding steel balls.

[0008] The technical solution adopted by this invention to solve its technical problem is: A method for rapid screening of steel balls using a slider, comprising: Step 1: Prepare a tooling block and a calibration block. The outer contour of the tooling block is completely consistent with the size of the standard track and the target value steel ball after combination. The tooling block is provided with multiple secondary gas channels, which are respectively opposite to multiple channels on the calibration block. The calibration block and the tooling block are used together to obtain the judgment benchmark of the steel ball installation gap. Step two: Install the calibration block on the tooling block, supply air to the multiple secondary gas channels using a pneumatic gauge, and measure the supply pressure. Determine the gap h between the grooves on the tooling block and the calibration block based on the supply pressure. 目 ; Step 3: Install the slider to be tested onto the tooling block, supply air to the multiple secondary gas channels through a pneumatic gauge, and measure the supply pressure. Obtain the gap h between the slider to be tested and the groove on the calibration block using the supply pressure. 实 ,according to Obtain the dimensions of the assembled steel balls ,in The target value is the diameter of the steel ball.

[0009] Furthermore, the tooling block is provided with a main gas channel, and an air intake channel is connected to the main gas channel. The end of the air intake channel away from the main gas channel is located at the bottom of the tooling block, and multiple secondary gas channels are all connected to the main gas channel.

[0010] Furthermore, the gas flow paths are equal from the end of the intake channel away from the main gas channel to the end of each secondary gas channel away from the main gas channel.

[0011] Furthermore, the secondary gas channels are inclined, and the axis of each secondary gas channel is the same as the line connecting the contact point between the corresponding steel ball and the slider / track.

[0012] Furthermore, the tooling block is provided with two auxiliary channels, which are symmetrically arranged on both sides of the intake channel. The auxiliary channels are used to connect the main gas channel and the secondary gas channel.

[0013] Further, the calibration block includes an upper limit calibration block and a lower limit calibration block. The upper limit calibration block is used to obtain the maximum value of the groove dimension tolerance between the upper limit calibration block and the standard track; the lower limit calibration block is used to obtain the minimum value of the groove dimension tolerance between the lower limit calibration block and the standard track. In step two, the upper limit calibration block and the lower limit calibration block are used to obtain the gap between the tooling block and the upper and lower limit calibration blocks respectively, or the upper limit calibration block or the lower limit calibration block is used to obtain h. 目 .

[0014] Furthermore, the method for obtaining the gap h between the tooling block and the upper channel of the slider by means of air supply pressure is as follows: Where P is the pressure in the measuring chamber; P s d is the gas supply pressure; β is the probe nozzle diameter; K is the structural coefficient; and K is the system gain coefficient.

[0015] Furthermore, the calibration block also includes a standard calibration block. Before step two, a standard calibration block consistent with the target slider is pushed onto the tooling block, with the known measured gap size h. 标 Target value: steel ball size d 目 Under these circumstances, the measurement was obtained Obtain the structure coefficient β.

[0016] Furthermore, in step two, the upper limit calibration block and the lower limit calibration block are pushed onto the tooling block respectively to obtain the measured value h. 目1 Measured value h 目2 The size range of the assembled steel balls on the slider to be tested is: .

[0017] A tooling block for rapid screening of steel balls using a slider is disclosed. The outer contour of the tooling block is completely consistent with the dimensions of the standard track and the target value steel balls combined. The tooling block has a first protrusion, a second protrusion, a third protrusion, and a fourth protrusion, which are respectively located opposite to the positions of the steel balls. The tooling block is provided with a first gas channel, a second gas channel, a third gas channel, and a fourth gas channel. The first gas channel, the second gas channel, the third gas channel, and the fourth gas channel are respectively located on the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion, and are respectively opposite to multiple grooves on the slider.

[0018] The beneficial effects of this invention are that it uses pneumatic measurement for rapid measurement. Using a standard track as a reference, a tooling block with dimensions completely identical to the standard track and target steel ball is designed. The pressure signal is directly read using a pneumatic gauge. Through calibration with the standard gauge block, the correspondence between pressure P and clearance h is established to ensure measurement accuracy. The pressure value is converted into channel spacing using a formula. This method eliminates the need to measure the dimensions of the slider and track, significantly shortening the detection time. The measurement results are intuitive and easy to apply quickly on-site.

[0019] Furthermore, equipped with upper limit calibration blocks and lower limit calibration blocks, it is possible to quickly determine whether the slider size meets the requirements without the need for complex fitting calculations. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the relationship between the slider and the track in this invention.

[0022] Figure 2 This is a schematic diagram of the tooling block in this invention.

[0023] Figure 3 This is a schematic diagram of the assembly relationship between the tooling block and the calibration block in this invention.

[0024] Figure 4 This is a flowchart illustrating the process of obtaining the dimensions of the assembled steel ball in this invention.

[0025] In the diagram: 1. Track; 21. Target slider; 22. Slider to be tested; 31. Upper limit calibration block; 32. Lower limit calibration block; 33. Standard calibration block; 4. Tooling block; 41. First gas channel; 42. Second gas channel; 43. Third gas channel; 44. Fourth gas channel; 45. Main gas channel; 46. Auxiliary channel; 47. Inlet channel; 5. Steel ball. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] A method for rapid screening of steel balls using a slider includes the following steps: Step 1, Prepare tooling block 4 Reference Figure 1 , 2The standard track 1, the target slider 21, and the target value steel ball 5 are known to be combined as a reference group for preparing the tooling block 4. The outer contour of the tooling block 4 is completely consistent with the size of the standard track 1 and the target value steel ball 5 after combination.

[0030] The parts on the tooling block 4 that are opposite to the position of the steel ball 5 are the first protrusion, the second protrusion, the third protrusion and the fourth protrusion. The first protrusion and the second protrusion are located on the same side of the tooling block 4, the third protrusion and the fourth protrusion are located on the same side of the tooling block 4, and the first protrusion and the third protrusion are located above the second protrusion and the fourth protrusion.

[0031] The tooling block 4 is equipped with a main gas channel 45, a first gas channel 41, a second gas channel 42, a third gas channel 43, and a fourth gas channel 44. The first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 are respectively provided on the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion. One end of the main gas channel 45 is located between the first protrusion and the second protrusion, and the other end is located between the third protrusion and the fourth protrusion. The main gas channel 45 is a straight channel. The tooling block 4 is provided with an air inlet channel 47, which is used to supply air to the main gas channel 45. One end of the air inlet channel 47 is located at the bottom of the tooling block 4, and the other end is connected to the middle position of the main gas channel 45. Specifically, the multiple secondary gas channels include a first gas channel 41, a second gas channel 42, a third gas channel 43, and a fourth gas channel 44. The first gas channels 41 and 43 are symmetrically arranged on both sides of the intake channel 47 along the axial direction. The second gas channels 42 and 44 are symmetrically arranged on both sides of the intake channel 47 along the axial direction. The first gas channels 41 and 42 are symmetrically arranged on both sides of the main gas channel 45 along the axial direction. The third gas channels 43 and 44 are symmetrically arranged on both sides of the main gas channel 45 along the axial direction. Thus, the gas paths from the end of the intake channel 47 away from the main gas channel 45 to the ends of the multiple secondary gas channels away from the main gas channel 45 are all equal. The path and time for the gas to enter the gap between the tooling block 4 and the calibration block or slider through the intake channel 47 are the same, improving the measurement effect and measurement efficiency. like Figure 1 , 3As shown, the first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 are inclined, and their axes are the same as the lines connecting the contact points between the steel ball 5 and the slider and the track 1 corresponding to the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion, respectively. That is, the angle α between the axis of the first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 and the horizontal direction is equal to the angle β between the line connecting the contact points between the corresponding steel ball 5 and the slider and the track 1 and the horizontal direction. Furthermore, in order to ensure that the first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 can be connected to the main gas channel 45, the tooling block 4 is also provided with auxiliary channels 46. There are two auxiliary channels 46, which are located on both sides of the intake channel 47. The auxiliary channels 46 are drilled from the bottom of the tooling block 4. One auxiliary channel 46 connects the first gas channel 41, the second gas channel 42 and the main gas channel 45, and the other auxiliary channel 46 connects the third gas channel 43, the fourth gas channel 44 and the main gas channel 45.

[0032] Step 2, Prepare calibration block The calibration block replaces the slider as the criterion for judging the installation gap of the steel ball 5. The calibration block includes an upper limit calibration block 31 and a lower limit calibration block 32. The upper limit calibration block 31 is used to obtain the maximum value of the groove size tolerance between the upper limit calibration block 31 and the standard track 1. The lower limit calibration block 32 is used to obtain the minimum value of the groove size tolerance between the lower limit calibration block 32 and the standard track 1.

[0033] Step 3: Use a pneumatic gauge to measure pressure. Calculate the structural coefficient β Where P is the pressure in the measuring chamber, which is the pressure signal directly read from the pneumatic gauge; h is the size of the measured gap; P s ρ is the gas supply pressure; d is the probe nozzle diameter; β is the structural coefficient, determined by the probe shape and gas path design; K is the system gain coefficient, which is related to gas viscosity and temperature.

[0034] The calibration block also includes standard calibration block 33, as referenced. Figure 4In the small figure (a), a standard calibration block 33, customized to a one-to-one ratio with the target slider 21, is pushed onto the tooling block 4. The first, second, third, and fourth protrusions are respectively aligned with the four channels on the calibration block, blocking the auxiliary channel 46. Air is introduced through the air inlet channel 47. The gas enters the first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 through the main gas channel 45, and then the pressure value P measured by the pneumatic gauge is obtained. Since the standard calibration block 33 can be regarded as the target slider 21, the measured gap size h 标 Given that the size d of the assembled steel ball 5 (target value steel ball 5) is... 目 It is known that Thus, the structural coefficient β can be calculated.

[0035] Step 3, upper and lower limit measurement Reference Figure 4 In the small diagram (b), the upper limit calibration block 31 is pushed onto the tooling block 4, blocking the auxiliary channel 46. Gas is introduced through the inlet channel 47, and the gas enters the first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 through the main gas channel 45, resulting in the pressure value P measured by the pneumatic gauge. The measured value h was calculated. 目1 .

[0036] Reference Figure 4 In the small diagram (c), the lower limit calibration block 32 is pushed onto the tooling block 4, blocking the auxiliary channel 46. Gas is introduced through the inlet channel 47, and the gas enters the first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 through the main gas channel 45, resulting in the pressure value P measured by the pneumatic gauge. The measured value h was calculated. 目2 .

[0037] Step 4, Measurement of the slider 22 to be tested. Reference Figure 4 In the small diagram (d), the slider 22 to be tested is pushed onto the tooling block 4, blocking the auxiliary channel 46. Air is introduced through the air inlet channel 47. The gas enters the first gas channel 41, the second gas channel 42, the third gas channel 43, and the fourth gas channel 44 through the main gas channel 45, and the pressure value P measured by the pneumatic gauge is obtained. The measured value h was calculated. 实 .

[0038] Based on the data obtained in step three, the size range of assembly steel ball 5 is as follows: If only the upper limit calibration block 31 or the lower limit calibration block 32 is used, then or .

[0039] Example 1 Step 1: Set up the system and prepare standard components Prepare a special tooling block 4, whose probe nozzle diameter d is known to be 0.5 mm. Prepare a standard calibration block 33, whose internal channel dimensions are precisely known, corresponding to the target steel ball diameter d. 目 The theoretical gap h 标 (When designing tooling, h) 标 =0.01mm), formula relationship: Substituting the data, we calculate: β = 500.

[0040] Step 2: Conduct calibration experiments In this embodiment, only the lower limit calibration block 32 is used for calibration, and the lower limit calibration block 32 is installed on the tooling block 4.

[0041] Connect the gas source and keep the gas source pressure Ps stable. The measured value is 0.6 MPa.

[0042] After the system stabilized, the pressure value P in the measuring chamber was read from the pneumatic gauge, and the measured value was 0.5 MPa.

[0043] Record the ambient temperature at this time (for later consideration of the system gain coefficient K; for simplicity, assume K has been calibrated to 1), and calculate... .

[0044] Step 3: Sorting the steel balls Install the slider 22 to be tested onto the tooling block 4.

[0045] Connect the air supply and maintain a stable air supply pressure Ps. After the system stabilizes, read the pressure value P of the measuring chamber from the pneumatic gauge. Based on the data obtained in steps 1 and 2, calculate the... , .

[0046] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A method for rapid screening of steel balls using a slider, characterized in that, include, Step 1: Prepare tooling block (4) and calibration block. The outer contour of tooling block (4) is completely consistent with the size of the standard track (1) and the target value steel ball (5) after combination. Multiple secondary gas channels are provided on tooling block (4). The multiple secondary gas channels are respectively opposite to multiple channels on calibration block. The calibration block and tooling block (4) are used together to obtain the judgment benchmark of the installation gap of steel ball (5). Step 2: Install the calibration block on the tooling block (4), supply air to the multiple secondary gas channels through a pneumatic gauge, and measure the supply pressure. Determine the gap h between the tooling block (4) and the upper channel of the calibration block based on the supply pressure. 目 ; Step 3: Install the slider (22) to be tested on the tooling block (4), supply air to the multiple secondary gas channels through the pneumatic gauge, and measure the supply pressure. Obtain the gap h between the slider (22) to be tested and the channel on the calibration block through the supply pressure. 实 ,according to Obtain the dimensions of the assembled steel ball (5). ,in The target value is the diameter of the steel ball (5).

2. The rapid screening method for steel balls using a slider according to claim 1, characterized in that, The tooling block (4) is provided with a main gas channel (45), and an air inlet channel (47) is connected to the main gas channel (45). The end of the air inlet channel (47) away from the main gas channel (45) is located at the bottom of the tooling block (4), and multiple secondary gas channels are connected to the main gas channel (45).

3. The rapid screening method for steel balls using a slider according to claim 2, characterized in that, The gas flow paths from the end of the intake channel (47) away from the main gas channel (45) to the end of each secondary gas channel away from the main gas channel (45) are all equal.

4. The rapid screening method for steel balls using a slider according to claim 1, characterized in that, The secondary gas channels are inclined, and the axis of each secondary gas channel is the same as the line connecting the contact point between the corresponding steel ball (5) and the slider and track (1).

5. The rapid screening method for steel balls using a slider according to claim 2, characterized in that, The tooling block (4) is provided with two auxiliary channels (46), which are symmetrically arranged on both sides of the intake channel (47). The auxiliary channels (46) are used to connect the main gas channel (45) and the secondary gas channel.

6. The rapid screening method for steel balls using a slider according to claim 1, characterized in that, The calibration block includes an upper limit calibration block (31) and a lower limit calibration block (32). The upper limit calibration block (31) is used to obtain the maximum value of the groove size tolerance between the upper limit calibration block (31) and the standard track (1) when they are fitted together. The lower limit calibration block (32) is used to obtain the minimum value of the groove size tolerance between the lower limit calibration block (32) and the standard track (1) when they are fitted together. In step two, the upper limit calibration block (31) and the lower limit calibration block (32) are used to obtain the gap between the tooling block (4) and the upper limit calibration block (31) and the lower limit calibration block (32) respectively, or the upper limit calibration block (31) or the lower limit calibration block (32) is used to obtain h. 目 .

7. The rapid screening method for steel balls using a slider according to claim 1, characterized in that, The method for obtaining the gap h between the tooling block (4) and the upper channel of the slider by means of air supply pressure is as follows: Where P is the pressure in the measuring chamber; P s d is the gas supply pressure; β is the probe nozzle diameter; K is the structural coefficient; and K is the system gain coefficient.

8. The rapid screening method for steel balls using a slider according to claim 1, characterized in that, The calibration block also includes a standard calibration block (33). Before step two, the standard calibration block (33) that matches the target slider (21) is pushed onto the tooling block (4). The measured gap size h is known. 标 The target value of the steel ball (5) is the size d. 目 Under these circumstances, the measurement was obtained Obtain the structure coefficient β.

9. The rapid screening method for steel balls using a slider according to claim 1, characterized in that, In step two, the upper limit calibration block (31) and the lower limit calibration block (32) are pushed onto the tooling block (4) respectively to obtain the measured value h. 目1 Measured value h 目2 The size range of the assembled steel ball (5) on the slider (22) to be tested is... .

10. A tooling block for rapid screening of steel balls using a slider, characterized in that, The outer contour of the tooling block (4) is completely consistent with the size of the standard track (1) and the target value steel ball (5) after combination. The tooling block (4) is provided with a first protrusion, a second protrusion, a third protrusion and a fourth protrusion, which are opposite to the position of the steel ball (5). The tooling block (4) is provided with a first gas channel (41), a second gas channel (42), a third gas channel (43) and a fourth gas channel (44). The first gas channel (41), the second gas channel (42), the third gas channel (43) and the fourth gas channel (44) are respectively provided on the first protrusion, the second protrusion, the third protrusion and the fourth protrusion, and are respectively opposite to the multiple grooves on the slider.

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