Steel ball protruding amount measuring gauge of positioning male pin for exchange workbench
By designing a steel ball protrusion measurement instrument for positioning public pins, the problem of lack of accurate measurement in the prior art is solved, and high-precision steel ball protrusion measurement is achieved, ensuring the accuracy and safety of batch processing , avoiding the scrapping of positioning public pins and meeting the technical requirements of high precision.
Patent Information
- Application Number
- CN202420266412.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-04
AI Technical Summary
The prior art lacks effective inspection tools for measuring the protrusion of steel balls of positioning the male pins, resulting in insufficient processing accuracy and affecting the assembly accuracy and safety of male and female pins.
A steel ball projection measurement measuring tool for positioning a public pin for exchange workbench is designed, including a base, a top rod, a spring, a cylindrical pin, a side plate and a measuring block. The cylindrical pin is moved upward by spring compression force and the top rod is upward. Push the steel balls to the measurement plane and use a feeler gauge to measure the projection of the steel balls to ensure measurement accuracy.
It realizes high-precision measurement of the protrusion of the steel ball of positioning, which facilitates timely compensation or replacement of tools during batch processing, avoids scrapping of the positioning, saves funds and time, and controls the protrusion of the steel ball of the steel ball within the range of ±0.03mm, meeting ±0.1 Technical requirements of mm.
Smart Images
Figure CN222188091U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a gauge for a horizontal machining center, in particular to a gauge for measuring the protrusion of a steel ball of a positioning male pin for an exchange workbench. Background Art
[0002] At present, the exchange worktables of most double exchange horizontal machining centers at home and abroad use multi-point conical surface positioning, which has the advantages of good rigidity, rapid positioning, and high positioning accuracy. The key parts used are the positioning male pin and the positioning female pin. With the development of the market, the demand and precision requirements for high-precision horizontal machining centers are getting higher and higher. How to achieve the various precisions of male and female pins is an important issue in the production process.
[0003] The radial direction of the male positioning pin is provided with a plurality of steel ball holes for installing steel balls. After the male positioning pin and the female positioning pin are assembled, the axial positioning between the male and female pins is achieved by the protrusion of the steel ball. The male positioning pin is a key positioning and connecting part between the workbench and the machine tool. A reasonable protrusion of the steel ball contributes to the reliability of the connection between the two and ensures the stability of the operation of the workbench during processing. Since the steel ball hole on the male positioning pin is processed to the finished product by tool back boring, the tool fillet, tool setting error and tool wear during processing will affect the finished product size of the steel ball hole. Among them, the tool fillet can be controlled by program compensation, and the tool setting error is generally small. Therefore, the main error of the steel ball hole comes from tool wear. The hardness of the male positioning pin reaches 58HRC, and a single part has multiple steel ball holes (usually 5), which makes the tool wear more obvious during processing. Corresponding program compensation is required to maintain and control the stability of the steel ball protrusion. At present, there is no corresponding inspection tool to measure the protrusion of the steel ball during the processing of the male positioning pin. The protrusion of the steel ball is generally controlled by the operator's personal experience and his judgment of the degree of tool wear, which can easily lead to the processing accuracy of the protrusion of the steel ball failing to meet the requirements, thereby affecting the assembly accuracy of the male and female pins and other safety hazards. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a steel ball protrusion amount measuring tool for positioning male pins for an exchange workbench in view of the deficiencies in the prior art. The tool has a simple structure, low cost, convenient and quick operation, and high measurement accuracy, and can meet the measurement of the steel ball protrusion amount during the batch processing of positioning male pins.
[0005] The utility model solves the above-mentioned technical problem by adopting the following technical scheme: a steel ball protrusion measuring tool for positioning male pins for exchange workbenches, comprising a base, a push rod, a spring, a cylindrical pin, a side plate and a measuring block, wherein the push rod is vertically penetrated through the base, the push rod is provided with a protruding portion, the side plate is detachably fixed to one side of the base, the measuring block is detachably fixed to the inner side of the side plate, the inner side surface of the measuring block is a measuring plane, the measuring plane faces the push rod, the height of the measuring plane matches the height of the steel ball after the positioning male pin to be measured is installed, the cylindrical pin is transversely inserted into the bottom of the push rod, one end of the cylindrical pin radially extends out of the push rod, the base The bottom of the device is provided with an upward concave groove, and the groove is provided on one side of the push rod. The spring sleeve is provided on the outer side of the push rod and is pressed by the push rod and the base. The upper part of the base is provided with a mounting hole, and the mounting hole is used for clearance fitting and fixing the mounting outer circle of the positioning male pin to be measured. After the positioning male pin to be measured is installed on the base, the ejection part on the push rod is inserted into the inner hole of the positioning male pin to be measured, and the push rod is rotated. Relying on the elastic force generated when the spring is compressed, the cylindrical pin is moved upward into the groove. At the same time, the push rod moves upward and completely ejects the steel ball on the positioning male pin to be measured, and then the positioning male pin is rotated to minimize the distance between the steel ball and the measuring plane. The minimum distance is measured with a feeler gauge, which is the protrusion of the steel ball.
[0006] The utility model measuring fixture is used to measure the protrusion of the steel ball of the positioning male pin, is suitable for the exchange workbench of the horizontal machining center, can realize the measurement of the protrusion of the steel ball of the positioning male pin, and is convenient for timely tool compensation or replacement according to the tool wear situation during batch processing of steel ball holes.
[0007] The measuring principle of the utility model measuring fixture is as follows: after the fixture is installed, the distance between the measuring plane on the measuring block and the center line of the mounting hole on the base is measured using a three-dimensional coordinate measuring instrument and the measurement result is calibrated as a. According to the theoretical value of the protrusion amount when the steel ball on the positioning male pin is completely ejected, the distance b between the center of the steel ball and the center line of the mounting hole on the base is calculated. The difference between a and b is the theoretical gap value between the center of the steel ball and the measuring plane, and the gap value is the theoretical size of the selected feeler gauge. Based on the theoretical size, the qualified size range of the steel ball protrusion amount is determined.
[0008] The operation of the measuring fixture of the utility model is as follows: first install the push rod and spring on the base, then fix the push rod and spring to the base through the cylindrical pin, then install the side plate, then install the positioning pin to be measured with the steel ball on the base, and finally install the measuring block on the side plate, then rotate the push rod, rely on the elastic force generated when the spring is compressed, so that the cylindrical pin moves upward into the groove, and at the same time the push rod moves upward and completely pushes out the steel ball on the positioning pin to be measured, and then rotate the positioning pin to minimize the distance between the steel ball and the measuring plane, and use a feeler gauge to measure the minimum distance, which is the protrusion of the steel ball. Determine whether the measured protrusion of the steel ball falls within the qualified size range. If it does not fall within the qualified size range, the tool is compensated or replaced in time according to the tool wear.
[0009] By controlling the size of the mounting hole on the base, the size of the gap between the mounting hole and the mounting outer circle of the positioning male pin can be controlled, thereby ensuring the repeated positioning accuracy during the measurement of the protrusion of the steel ball.
[0010] Preferably, a notch is provided at the bottom of the base, the notch is communicated with the groove and is arranged below the groove. Before measurement, the cylindrical pin presses the top surface of the notch, and the ejector rod and the spring are fixed to the base. During the measurement, the ejector rod is rotated, and the cylindrical pin moves upward into the groove by relying on the elastic force generated when the spring is compressed. At the same time, the ejector rod moves upward and completely ejects the steel ball on the positioning male pin to be measured.
[0011] Preferably, the upper surface of the base is a mounting plane, and the mounting plane is arranged on the outside of the mounting hole. After the positioning male pin to be measured is installed on the base, the mounting surface on the positioning male pin to be measured fits with the mounting plane to ensure the installation accuracy of the positioning male pin to be measured on the base.
[0012] Preferably, the upper side of the ejection portion is connected with a conical portion, and the radial outer surface of the conical portion is an annular conical surface that is smaller at the top and larger at the bottom. After the positioning male pin to be measured is installed on the base, before the ejector rod is rotated, the annular conical surface is opposite to the steel ball on the positioning male pin to be measured. The conical portion plays a transition role, which can prevent the steel ball from being scratched during the ejection of the steel ball by the ejector rod.
[0013] Preferably, the side panels are detachably fixedly connected to the base and the measuring block by screws respectively.
[0014] Compared with the prior art, the utility model has the following advantages:
[0015] 1) The measuring fixture of the utility model has a simple structure, low cost, convenient and quick operation, small cumulative error between its components, high measurement accuracy, and the main error of the fixture only comes from the gap between the mounting hole on the base and the mounting outer circle of the positioning male pin. The error can be reduced by controlling the gap size between the mounting hole and the mounting outer circle of the positioning male pin, thereby ensuring the repeated positioning accuracy during the measurement of the protrusion of the steel ball.
[0016] 2) The utility model measuring fixture can meet the needs of measuring the protrusion of the steel ball during the batch processing of the positioning male pins, which is helpful to timely compensate or replace the tool according to the tool wear situation, avoid the scrapping of the batch positioning male pins, and save a lot of money and time.
[0017] 3) After adopting the measuring fixture of the utility model, the protrusion of the steel ball of the positioning male pin processed in batches can be controlled within ±0.03mm, meeting the technical requirement of the axial size of the steel ball hole of the positioning male pin of ±0.1mm. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a front view of the measuring state of the measuring fixture in the embodiment;
[0019] Figure 2 To correspond to Figure 1 Schematic diagram of the structural longitudinal section;
[0020] The specific reference numerals in the figure are as follows:
[0021] 1-base, 11-notch, 12-groove, 13-mounting hole, 14-mounting plane, 2-push rod, 21-ejection part, 22-conical part, 3-spring, 4-cylindrical pin, 5-side plate, 6-measuring block, 61-measuring plane, 7-positioning male pin to be measured, 71-steel ball on the positioning male pin to be measured, 72-mounting outer circle of the positioning male pin to be measured, 73-mounting surface on the positioning male pin to be measured. DETAILED DESCRIPTION
[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0023] The steel ball protrusion measuring fixture for positioning the male pin of the exchange workbench of the embodiment is as follows: Figure 1 and Figure 2As shown, it includes a base 1, a push rod 2, a spring 3, a cylindrical pin 4, a side plate 5 and a measuring block 6. The push rod 2 is vertically penetrated in the base 1, and a push-out portion 21 is provided on the push rod 2. The side plate 5 is detachably fixed to one side of the base 1 by screws. The measuring block 6 is detachably fixed to the inner side of the side plate 5 by screws. The inner side of the measuring block 6 is a measuring plane 61, and the measuring plane 61 faces the push rod 2. The height of the measuring plane 61 matches the height of the steel ball after the positioning male pin 7 to be measured is installed. The cylindrical pin 4 is laterally inserted in the bottom of the push rod 2, and one end of the cylindrical pin 4 radially extends out of the push rod 2. A notch 11 and an upwardly concave groove 12 are provided at the bottom of the base 1. The groove 12 is provided on one side of the push rod 2, and the notch 11 is communicated with the groove 12 and is provided Below the groove 12, the spring 3 is sleeved on the outside of the push rod 2 and is pressed by the push rod 2 and the base 1. A mounting hole 13 is provided on the upper part of the base 1. The mounting hole 13 is used to install and fix the mounting outer circle 72 of the positioning male pin 7 to be measured with clearance fit. After the positioning male pin 7 to be measured is installed on the base 1, the ejection portion on the push rod 2 is inserted into the inner hole of the positioning male pin 7 to be measured. The push rod 2 is rotated, and the elastic force generated when the spring 3 is compressed is used to move the cylindrical pin 4 upward into the groove 12. At the same time, the push rod 2 moves upward and completely ejects the steel ball 71 on the positioning male pin 7 to be measured. Then, the positioning male pin is rotated to minimize the distance between the steel ball 71 and the measuring plane 61. The minimum distance is measured with a feeler gauge, which is the protrusion of the steel ball.
[0024] In this embodiment, the upper surface of the base 1 is a mounting plane 14 , and the mounting plane 14 is arranged outside the mounting hole 13 . After the positioning male pin 7 to be tested is installed on the base 1 , the mounting surface 73 on the positioning male pin 7 to be tested fits with the mounting plane 14 .
[0025] In this embodiment, a conical portion 22 is connected to the upper side of the ejection portion 21, and the radial outer surface of the conical portion 22 is an annular cone surface that is smaller at the top and larger at the bottom. After the positioning male pin 7 to be measured is installed on the base 1, before the ejector rod 2 is rotated, the annular cone surface is positioned opposite to the steel ball 71 on the positioning male pin 7 to be measured.
[0026] The operation of using the above-mentioned measuring fixture is as follows: first install the push rod 2 and spring 3 on the base 1, then fix the push rod 2 and spring 3 to the base 1 through the cylindrical pin 4, then install the side plate 5, then install the positioning pin 7 to be measured with the steel ball 71 on the base 1, and finally install the measuring block 6 on the side plate 5, then rotate the push rod 2, rely on the elastic force generated by the compression of the spring 3, so that the cylindrical pin 4 moves upward into the groove 12, and at the same time, the push rod 2 moves upward and completely pushes out the steel ball 71 on the positioning pin 7 to be measured, and then rotate the positioning pin to minimize the distance between the steel ball 71 and the measuring plane 61, and use a feeler gauge to measure the minimum distance, which is the steel ball protrusion. Determine whether the measured steel ball protrusion falls within the qualified size range. If not, compensate or replace the tool in time according to the tool wear.
[0027] The above-mentioned measuring fixture can meet the needs of measuring the protrusion of the steel ball during the batch processing of the positioning male pins, which is helpful to timely compensate or replace the tool according to the tool wear situation, avoid the scrapping of the batch positioning male pins, and save a lot of money and time.
[0028] After long-term tracking of the use of the above-mentioned measuring fixtures, the protrusion of the steel ball of the positioning male pins processed in batches can be controlled within ±0.03mm, meeting the technical requirement of the axial size of the steel ball hole of the positioning male pin of ±0.1mm.
Claims
1. A steel ball protrusion measuring fixture for positioning male pins for exchange worktables, characterized in that: It includes a base, a push rod, a spring, a cylindrical pin, a side plate and a measuring block. The push rod is vertically inserted into the base, and the push rod is provided with a ejection portion. The side plate is detachably fixed to one side of the base, and the measuring block is detachably fixed to the inner side of the side plate. The inner side of the measuring block is a measuring plane, and the measuring plane faces the push rod. The height of the measuring plane matches the height of the steel ball after the positioning male pin to be measured is installed. The cylindrical pin is laterally inserted into the bottom of the push rod, and one end of the cylindrical pin radially extends out of the push rod. The bottom of the base is provided with an upward concave groove, and the groove is provided on one side of the push rod. The spring is sleeved on the outer side of the push rod and is pressed by the push rod and the base. The upper part of the base is provided with a mounting hole, and the mounting hole is used for clearance fitting to install and fix the mounting outer circle of the positioning male pin to be measured.
2. The steel ball protrusion measuring jig for positioning male pins for a switching workbench according to claim 1 is characterized in that: A notch is arranged at the bottom of the base, and the notch is communicated with the groove and arranged below the groove.
3. The steel ball protrusion measuring jig for positioning male pins for a switching workbench according to claim 1 is characterized in that: The upper surface of the base is a mounting plane, and the mounting plane is arranged outside the mounting hole.
4. The steel ball protrusion measuring jig for positioning male pins for a switching workbench according to claim 1 is characterized in that: The upper side of the ejection portion is connected with a tapered portion, and the radial outer surface of the tapered portion is an annular tapered surface that is smaller at the top and larger at the bottom.
5. The steel ball protrusion measuring jig for positioning male pins for a switching workbench according to claim 1, characterized in that: The side panels are detachably fixedly connected to the base and the measuring block by screws respectively.