Accurate grinding equipment for measuring surface of caliper

Abstract

The utility model discloses accurate grinding equipment for measuring surfaces of calipers. The accurate grinding equipment comprises a motion control module, an accurate grinding execution module and a clamping and positioning module, the motion control module comprises a Y-axis driving unit and an X-axis driving unit, and the Y-axis driving unit and the X-axis driving unit drive the accurate grinding execution module and the clamping positioning module to precisely move along the Y axis and the X axis through a servo motor and a ball screw pair correspondingly. The accurate grinding execution module comprises a grinding machine spindle driven by a spindle motor and a grinding wheel. The clamping and positioning module comprises a pressing unit driven by an air cylinder and a positioning baffle capable of being manually overturned, the pressing unit is provided with four groups of hinged pressing blocks, and a flexible buffer layer is arranged on the contact surface; the position of the positioning baffle is fixed through the positioning shaft and the positioning nut. The X-axis driving unit is provided with a grating ruler to form closed-loop control, and the grinding unit is provided with a semi-closed protective cover. The caliper surface measuring grinding device is compact in structure, accurate in positioning, capable of effectively improving surface measuring grinding precision and machining efficiency of the caliper, and suitable for surface measuring accurate grinding machining of the high-precision caliper.

Description

Technical Field

[0001] This utility model relates to the field of caliper surface grinding technology, and in particular to a caliper surface grinding device. Background Technology

[0002] Calipers are high-precision measuring tools widely used in industrial metrology and parts inspection. Their measuring surfaces require precision grinding after machining to achieve the necessary geometric accuracy and flatness, especially ensuring the relative parallelism, perpendicularity, and surface roughness between the two measuring surfaces. In traditional manufacturing processes, grinding of caliper measuring surfaces is mainly done using manual grinding machines or general-purpose CNC grinding machines. However, existing equipment presents the following technical problems when precision grinding workpieces like calipers, which have slender shapes and unique measuring surface distributions:

[0003] Most existing grinding equipment mainly relies on single-direction (such as Z-axis) feed and lacks independent drive capability along the X and Y axes. It is difficult to adjust the relative motion trajectory for different measuring surfaces and to control the grinding path and contact pressure between the grinding wheel and the surface being ground. This limits the equipment's ability to effectively cover and finely process the characteristics of the caliper measuring surfaces (such as those distributed on different sides).

[0004] Because calipers have small cross-sectional dimensions and require high structural symmetry, using general-purpose fixtures for clamping can easily lead to workpiece displacement, clamping deviation, or inaccurate repositioning, directly affecting the consistency of the grinding surface and the final measurement accuracy.

[0005] In summary, the existing technology still lacks a device solution that is structurally adaptable, has flexible motion control, and is stable and reliable in clamping, specifically designed for high-precision grinding of caliper surfaces. Utility Model Content

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0007] Therefore, to solve the above-mentioned technical problems, this utility model provides the following technical solution: a caliper surface grinding device, comprising...

[0008] The motion control module includes:

[0009] The Y-axis drive unit includes a Y-axis servo motor and a Y-axis transmission mechanism mechanically connected to it, used to drive the fine grinding execution module to move along the Y-axis direction;

[0010] The X-axis drive unit includes an X-axis servo motor and an X-axis transmission mechanism mechanically connected to it, used to drive the clamping and positioning module to move along the X-axis direction.

[0011] The precision execution module includes:

[0012] A rotary drive unit includes a spindle motor and a grinding spindle driven by the motor;

[0013] The grinding unit includes a grinding wheel mounted on the front end of the grinding machine spindle, wherein the axis of rotation of the grinding wheel forms a set angle with the caliper measuring surface;

[0014] The clamping and positioning module includes:

[0015] A clamping unit includes a cylinder and a clamping block driven by the cylinder, the clamping block having a contact surface that matches the profile of the caliper;

[0016] The positioning unit includes a manually flip-up positioning baffle, which has two states: a working position and a clearance position, and its positioning surface forms surface contact with the caliper surface.

[0017] As a preferred embodiment of the caliper surface grinding equipment of this utility model, the Y-axis transmission mechanism includes a ball screw pair and a linear guide rail, and the nut seat of the ball screw pair is fixedly connected to the base of the grinding execution module.

[0018] As a preferred embodiment of the caliper surface grinding equipment of this utility model, the X-axis transmission mechanism also includes a ball screw pair and a linear guide rail, wherein the nut seat of the ball screw pair is fixedly connected to the base of the clamping and positioning module.

[0019] In a preferred embodiment of the caliper surface grinding equipment of this utility model, the X-axis drive unit further includes a grating ruler, and the reading head of the grating ruler moves synchronously with the grinding execution module to form a closed-loop control system.

[0020] As a preferred embodiment of the caliper surface grinding equipment of this utility model, the grinding unit further includes a semi-enclosed protective cover, which is placed on the upper part of the grinding wheel to prevent waste from splashing.

[0021] As a preferred embodiment of the caliper surface grinding equipment of this utility model, the clamping unit is provided in four sets, with two sets of clamping units arranged on each of the left and right sides of the caliper. The clamping block of the clamping unit is hinged to the cylinder, and the contact surface of the clamping block is provided with a flexible buffer layer.

[0022] As a preferred embodiment of the caliper surface grinding equipment of this utility model, the positioning unit further includes a positioning shaft, one end of which is fixedly connected to the positioning baffle, and the other end of which passes through the positioning seat and is threaded with a positioning nut.

[0023] The positioning shaft is rotatably connected to the positioning seat and is fixed on the positioning seat by a positioning nut, thereby fixing the position of the positioning baffle.

[0024] As a preferred embodiment of the caliper surface grinding equipment of this utility model, the positioning unit is arranged at the tail of the caliper grinding surface, and the positioning unit also includes a support seat, which is arranged on the grinding worktable. When the positioning baffle is in the clearance position, it is locked on the support seat.

[0025] The beneficial effects of this utility model are:

[0026] 1. This utility model is equipped with a Y-axis drive unit and an X-axis drive unit, which drive the fine grinding execution module and the clamping and positioning module to move independently along the vertical direction (Y-axis) and the horizontal direction (X-axis), respectively. The two axes are driven by a servo motor and mechanical transmission structure (such as a lead screw and guide rail), enabling multi-directional grinding path control relative to the caliper's measuring surface. This allows the fine grinding wheel to flexibly engage with the measuring surfaces of different sides of the caliper. This structural design differs from the single-axis feed structure of existing general-purpose grinding machines; it is a targeted optimization for the multi-faceted fine grinding needs of slender parts, effectively improving the system's motion control capabilities.

[0027] 2. The clamping and positioning module of this utility model includes two parts: a clamping unit and a positioning unit. The clamping block has a contact surface that matches the contour of the caliper, and the controllable clamping force is achieved with the help of a cylinder drive. The positioning baffle is a flip-up structure, which can enter the working position during clamping to contact the caliper surface and form a limit. After grinding, it can be switched to the clearance position for easy picking up and putting down of the workpiece. This structure avoids the decrease in repeatability accuracy of the measurement surface caused by fixture deformation or position error. The positioning baffle provides a reliable reference, so that the caliper maintains a consistent spatial posture in each clamping. The flip-up structure design takes into account both operation convenience and clamping accuracy. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0030] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0031] Figure 3 This is a schematic diagram of the specific installation structure of this utility model.

[0032] Figure 4 This is an exploded view of a partial component structure of this utility model.

[0033] Figure 5 For the present utility model Figure 4 A magnified schematic diagram of a portion of the structure.

[0034] In the diagram: 100, Motion control module; 101, Y-axis drive unit; 101a, Y-axis servo motor; 101b, Y-axis transmission mechanism; 102, X-axis drive unit; 102a, X-axis servo motor; 102b, X-axis transmission mechanism;

[0035] 200. Precision grinding execution module; 201. Rotary drive unit; 201a. Spindle motor; 201b. Grinding machine spindle; 202. Grinding unit; 202a. Grinding wheel; 202b. Semi-enclosed protective cover;

[0036] 300. Clamping and positioning module; 301. Pressing unit; 301a. Cylinder; 301b. Pressing block; 302. Positioning unit; 302a. Positioning baffle; 302b. Positioning shaft; 302c. Positioning seat; 302d. Positioning nut; 302e. Support seat;

[0037] 400. Fine grinding worktable. Detailed Implementation

[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0041] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0042] Example 1

[0043] Reference Figures 1-3 The present invention provides a caliper measuring surface fine grinding device, which is suitable for high-precision automatic grinding of caliper measuring surfaces. It mainly includes a motion control module, a fine grinding execution module, and a clamping and positioning module, the specific structural and functional relationships of which are as follows:

[0044] Motion control module 100:

[0045] This module is used to drive the fine grinding device and clamping device to achieve multi-axis linkage during the machining process, so as to meet the requirements of different workpiece positions and grinding angles; it includes:

[0046] Y-axis drive unit 101:

[0047] Includes a Y-axis servo motor 101a, whose output shaft is connected to a ball screw pair;

[0048] The ball screw assembly includes a screw shaft and a nut seat, wherein the nut seat is fixedly connected to the base of the precision grinding execution module 200;

[0049] This structure drives the ball screw to rotate via the Y-axis servo motor 101a, thereby driving the precision grinding module 200 to move precisely along the Y-axis.

[0050] The Y-axis motion is also supported by a pair of linear guides to ensure smooth and wobbly movement.

[0051] X-axis drive unit 102:

[0052] It includes an X-axis servo motor 102a, which is equipped with a ball screw pair and a linear guide structure.

[0053] The nut seat of the ball screw pair is fixedly installed on the base of the clamping and positioning module 300, so as to realize the precise movement of the clamping mechanism along the X-axis direction;

[0054] It is also equipped with linear guide rails to ensure the smoothness of the machining process and the repeatability of positioning accuracy.

[0055] Fine grinding execution module 200:

[0056] This module handles the specific grinding operations, including:

[0057] Rotary drive unit 201:

[0058] It consists of a main spindle motor 201a, whose output shaft is connected to the grinding machine spindle 201b to drive the grinding wheel 202a to rotate at high speed.

[0059] Grinding unit 202:

[0060] A grinding wheel 202a is installed at the front end of the grinding machine spindle 201b. The grinding wheel 202a can be selected according to the material and grit size (such as CBN, resin binder, etc.) according to the process requirements.

[0061] The rotation axis of the grinding wheel 202a forms a preset angle (e.g., 15° to 30°) with the caliper measuring surface, so that the grinding wheel 202a can act on the caliper measuring surface at the set angle during processing to meet the grinding requirements of different measuring surfaces.

[0062] Clamping and positioning module 300:

[0063] This module is used to achieve stable clamping and accurate positioning of caliper workpieces, and includes:

[0064] Clamping unit 301:

[0065] It includes one or more sets of cylinders 301a, each cylinder 301a being hinged to a pressing block 301b via a piston rod;

[0066] The clamping block 301b has a contact surface that matches the profile of the caliper, and an outer layer of flexible buffer (such as polyurethane sheet) is attached to prevent damage to the workpiece surface and improve contact stability.

[0067] Positioning unit 302:

[0068] A manually reversible positioning baffle 302a is provided, and a positioning shaft 302b is connected to the positioning baffle 302a. The other end of the positioning shaft 302b passes through the positioning seat 302c and is fixed by a positioning nut 302d connected by a thread. The positioning shaft 302b and the positioning seat 302c form a rotatable hinge relationship, and the baffle 302a can be switched to the "working position" or the "avoidance position".

[0069] A support base 302e is added to the tail of the positioning unit 302 and installed above the worktable 400 to support the calipers when the positioning baffle 302a is in the avoidance state.

[0070] This embodiment also provides the workflow of the device described in the above embodiment, as follows:

[0071] The operator places the caliper on the workbench 400, rotates the positioning baffle 302a to the working position, and tightens the positioning nut 302d, so that the tail of the workpiece forms a precise surface contact with the positioning surface of the baffle 302a.

[0072] When the clamping unit 301 is activated, four sets of cylinders 301a push the clamping blocks 301b to simultaneously clamp the side surface of the caliper. The flexible contact surface of the clamping blocks 301b absorbs minute tolerances and ensures the stability of the caliper during the grinding process.

[0073] The spindle motor 201a drives the grinding wheel 202a to rotate, the Y-axis drives the grinding wheel spindle 201b to move longitudinally, and the X-axis controls the workpiece position.

[0074] The grinding process is fed back in real time by a grating ruler (not shown in the figure). The equipment can use a mature closed-loop system from existing technologies to dynamically correct the output of the servo motor and ensure the accuracy of the machining dimensions.

[0075] After grinding is completed, the clamping block 301b is retracted and the positioning baffle 302a is rotated to the clearance position to facilitate the picking and placing of the workpiece.

[0076] Example 2

[0077] Reference Figure 2 This is the second embodiment of the present invention. This embodiment differs from the previous embodiments in that it is optimized to further improve the accuracy, safety, and ease of use of the device. Its structure specifically includes:

[0078] A grating ruler is further incorporated into the X-axis drive structure as a displacement feedback device.

[0079] The grating ruler (not shown in the figure) is arranged along the X-axis, and its reading head is fixed on the fine grinding execution module 200 and moves synchronously with the grinding wheel 202a;

[0080] The control system (which can directly adopt existing mature technologies) collects feedback signals from the grating ruler to construct a closed-loop displacement control system, which can automatically correct position errors and achieve high-precision control.

[0081] Example 3

[0082] Reference Figure 4 This is the third embodiment of the present invention. The difference between this embodiment and the above embodiments is that this embodiment is optimized based on the above embodiments to further improve the accuracy, safety and ease of use of the device.

[0083] To improve operational safety, the following structural components are provided:

[0084] Semi-enclosed protective cover 202b:

[0085] The protective cover 202b can be made of transparent high-strength polycarbonate material and is placed on the upper part and around the grinding wheel 202a to prevent abrasive particles and chips from flying during grinding. The protective cover 202b can be designed with a quick-release interface to facilitate maintenance personnel to view and replace the grinding wheel 202a.

[0086] Example 4

[0087] Reference Figure 4 and 5 This is the fourth embodiment of the present invention. This embodiment differs from the previous embodiments in that the clamping functional component is further optimized to make it more practical. The specific optimizations are as follows:

[0088] Four sets of clamping units are arranged as follows:

[0089] Two sets of pneumatic clamping units 301 are set on each side of the caliper to achieve balanced force through bidirectional clamping;

[0090] The clamping block 301b and the cylinder 301a are hinged together by a hinge functional component, which facilitates control.

[0091] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0092] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A caliper-based precision grinding device, characterized in that: include Motion control module (100), comprising: The Y-axis drive unit (101) includes a Y-axis servo motor (101a) and a Y-axis transmission mechanism (101b) mechanically connected thereto, for driving the fine grinding execution module (200) to move along the Y-axis direction; The X-axis drive unit (102) includes an X-axis servo motor (102a) and an X-axis transmission mechanism (102b) mechanically connected thereto, for driving the clamping and positioning module (300) to move along the X-axis direction; The fine grinding execution module (200) includes: The rotary drive unit (201) includes a spindle motor (201a) and a grinding spindle (201b) driven by the motor; The grinding unit (202) includes a grinding wheel (202a) mounted on the front end of the grinding machine spindle (201b), wherein the rotation axis of the grinding wheel (202a) forms a set angle with the caliper measuring surface; Clamping and positioning module (300), comprising: The clamping unit (301) includes a cylinder (301a) and a clamping block (301b) driven by the cylinder, the clamping block (301b) having a contact surface that matches the profile of the caliper; The positioning unit (302) includes a manually flip-up positioning baffle (302a), which has two states: a working position and a clearance position, and its positioning surface forms a surface contact with the caliper surface.

2. The caliper-measuring precision grinding equipment as described in claim 1, characterized in that: The Y-axis transmission mechanism (101b) includes a ball screw pair and a linear guide, and the nut seat of the ball screw pair is fixedly connected to the base of the precision grinding execution module (200).

3. The caliper-measuring precision grinding equipment as described in claim 1, characterized in that: The X-axis transmission mechanism (102b) also includes a ball screw pair and a linear guide, the nut seat of which is fixedly connected to the base of the clamping and positioning module (300).

4. The caliper-based precision grinding equipment as described in claim 1, characterized in that: The X-axis drive unit (102) also includes a grating ruler, the reading head of which moves synchronously with the fine grinding execution module (200) to form a closed-loop control system.

5. The caliper-based precision grinding equipment as described in claim 1, characterized in that: The grinding unit (202) also includes a semi-enclosed protective cover (202b) which covers the upper part of the grinding wheel (202a) to prevent waste from splashing.

6. The caliper-based precision grinding equipment as described in claim 1, characterized in that: The clamping unit (301) is provided in four sets. Two sets of clamping units (301) are arranged on each side of the caliper. The clamping block (301b) of the clamping unit (301) is hinged to the cylinder (301a). The contact surface of the clamping block (301b) is provided with a flexible buffer layer.

7. The caliper-based precision grinding equipment as described in claim 1, characterized in that: The positioning unit (302) also includes a positioning shaft (302b), one end of which is fixedly connected to the positioning baffle (302a), and the other end passes through the positioning seat (302c) and is threadedly connected to a positioning nut (302d); The positioning shaft (302b) is rotatably connected to the positioning seat (302c) and fixed on the positioning seat (302c) by the positioning nut (302d), thereby fixing the position of the positioning baffle (302a).

8. The caliper-measuring precision grinding equipment as described in claim 1, characterized in that: The positioning unit (302) is arranged at the tail of the caliper's fine grinding surface. The positioning unit (302) also includes a support base (302e), which is arranged on the fine grinding worktable (400). When the positioning baffle (302a) is in the clearance position, it is locked on the support base (302e).

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