Jig for detecting outer surface of cylindrical workpiece

Abstract

The utility model discloses an outer surface detection jig for a cylindrical workpiece in the technical field of cylindrical workpiece surface detection, which comprises a base, micrometer gauges, probes, a detection clamping rod, a support frame, a limit rod and a baffle plate, the left side and the right side of the base are provided with mounting grooves, and the micrometer gauges can be mounted in the mounting grooves in the left side and the right side. When the diameters of the inner holes of the cylindrical workpiece are different, the cylindrical workpiece can be limited through the left and right groups of different limiting bumps, the breast board is additionally arranged to clamp the workpiece in a matched manner, and the limiting bumps and the breast board are used for positioning in an internal and external clamping manner, so that the workpiece can be accurately positioned when the circular degree of the circumferential surface of the workpiece is detected. The position of the vertical axis of the workpiece can be kept unchanged, the workpiece is accurately positioned, and the detection precision of the workpiece is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical workpiece surface inspection technology, and in particular to a fixture for inspecting the outer surface of cylindrical workpieces. Background Technology

[0002] Machining cylindrical workpieces generally requires turning and boring, as well as grinding the workpiece surface to ensure the accuracy of the arc of the workpiece surface, which is generally controlled within the range of 0.01mm.

[0003] In particular, the top and bottom planes of the workpiece must be kept parallel. Cylindrical workpieces have inner and outer layers, and the diameters of the inner hole and the outer cylinder must also be kept coaxial. The outer arc wall of such cylindrical workpieces requires high-precision coaxiality to avoid the machined cylinder having a large arc diameter on one side and a small arc diameter on the other side. Therefore, a dial indicator is needed to check the flatness of the outer arc wall and top of the cylinder. Sometimes, it is also necessary to flip the cylindrical workpiece over and check its bottom.

[0004] Based on this, the present invention designs a fixture for inspecting the outer surface of a cylindrical workpiece to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a fixture for inspecting the outer surface of a cylindrical workpiece. This device adds a base, and micrometers can be installed on both the left and right sides of the base for use with limiting protrusions for positioning the cylindrical workpiece. When the inner diameter of the cylindrical workpiece is different, it can be limited by two different sets of limiting protrusions on the left and right sides. In addition, a guardrail is added to clamp the workpiece. The workpiece is positioned by clamping it from the inside and outside by the limiting protrusions and the guardrail, which ensures that the vertical axis position of the workpiece remains unchanged when the roundness of the circumferential surface is inspected, thus effectively improving the inspection accuracy.

[0006] This utility model is implemented as follows: a fixture for inspecting the outer surface of a cylindrical workpiece, comprising:

[0007] Base, micrometer, probe, detection lever, support frame, limit rod, baffle plate, and spring hinge;

[0008] The base is a horizontal support platform. There is a mounting groove on each of the left and right sides of the base. The mounting grooves are open at the top of the base. The horizontal axis of the two mounting grooves coincides with the horizontal center axis of the base. The two mounting grooves are symmetrically arranged. The mounting grooves do not penetrate the bottom of the base.

[0009] Both the detection rod and the limiting rod are straight rods, and the detection rod and the limiting rod can be separably installed in any mounting slot. The detection rod and the limiting rod are in transition fit with the mounting slot.

[0010] Magnets are embedded in the bottom and inner side of the mounting groove, and the magnets are flush with the inner wall of the mounting groove.

[0011] Magnets are also provided on the horizontal bottom surface and vertical inner side wall of the detection rod and the limiting rod. The magnets are embedded inside the detection rod and the limiting rod, and the magnets are flush with the surface of the detection rod and the limiting rod.

[0012] The detection lever or limiting lever is positioned by being attracted to the mounting groove by magnets on the bottom and side walls;

[0013] An L-shaped bracket is vertically fixed to the top of the detection rod. Multiple universal joints are provided on the L-shaped bracket, and multiple support frames are connected to form a complete L-shaped bracket through the universal joints.

[0014] The micrometer is connected to the detection lever via an L-shaped bracket, and a probe is provided at the detection end of the micrometer.

[0015] The baffle is a flat plate with an arc-shaped groove on the top. The baffle is rotatably mounted on the top of the limiting rod by a spring hinge. The arc-shaped groove on the top of the baffle is a U-shaped groove. The baffle is continuously pressed inward against the outer wall of the cylindrical workpiece by the spring hinge.

[0016] The base has two sets of limiting protrusions on its top. The limiting protrusions are circular protrusions that protrude from the top of the base. The two sets of limiting protrusions are respectively located on the left and right sides of the vertical central axis, and each set of limiting protrusions is located inside the mounting groove.

[0017] Each group of the limiting protrusions has two, and the two limiting protrusions in the same group are symmetrically distributed about the horizontal central axis. The spacing between the two groups of limiting protrusions is different.

[0018] Furthermore, the L-shaped bracket includes three support frames and two universal joints, and the lowest support frame is fixedly connected to the detection rod;

[0019] The two support frames are vertically arranged, and a universal joint is provided between the two vertically arranged support frames;

[0020] One of the support frames is arranged horizontally, and the horizontally arranged support frame is connected to the upper end of the vertically arranged support frame through another universal joint;

[0021] The angle between adjacent support frames is adjusted by universal joints, and the adjacent support frames are locked together by universal joints.

[0022] Furthermore, the baffle is made of PVC board, and the top arc diameter of the baffle is larger than the maximum outer diameter of the cylindrical workpiece.

[0023] Furthermore, the two mounting slots on the left and right are symmetrically arranged along the vertical central axis, and the mounting slots are dovetail slots. The detection rod and the limiting rod are square stainless steel rods. The inner sidewalls of the detection rod and the limiting rod are provided with strip-shaped tenons. The detection rod and the limiting rod are slidably engaged with the mounting slots through the strip-shaped tenons.

[0024] Furthermore, the limiting protrusion is a cylinder made of PVC, and the diameter of the limiting protrusion is between 5-15mm, and the height of the limiting protrusion protruding from the top of the base is between 3-7mm.

[0025] The cylindrical workpiece has a circular hole inside, and the bottom of the circular hole inside the cylindrical workpiece is fitted and limited by any set of limiting protrusions.

[0026] The beneficial effects of this utility model are: 1. This utility model adds two sets of left and right limiting protrusions. The distance between the left and right sets of limiting protrusions in the front and rear directions is different to match cylindrical workpieces with different inner hole diameters, thereby effectively positioning the cylinder and avoiding displacement of the cylinder during the detection process. Therefore, it ensures that the vertical axis of the cylindrical workpiece remains stationary when the outer surface roundness of the workpiece is rotated for detection, effectively improving the detection accuracy.

[0027] 2. Because this device is equipped with two sets of left and right limiting protrusions, and the corresponding cylindrical workpieces on the left and right sides have different sizes, there are two detection positions for the cylindrical workpieces. This device is equipped with an installation groove, a detachable detection rod, and a limiting rod, so that the micrometer can be used to position and detect the cylindrical workpieces on different sides, making the operation of this device more flexible. At the same time, positioning magnets are also set in the installation groove and between the detection rod and the limiting rod to ensure that the installation position is accurate every time, and to maintain detection accuracy even when the workpiece is changed to a different detection position. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

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

[0030] Figure 2 This is a top view of the cylindrical workpiece of this utility model when it is on top of the base.

[0031] Figure 3 This is a schematic diagram showing the fit between the cylindrical workpiece and the side panel of this utility model.

[0032] Figure 4 This is a schematic diagram of the front structure of the parapet of this utility model;

[0033] Figure 5 This is a schematic diagram of the probe structure of this utility model for detecting the other end face of a cylindrical workpiece.

[0034] Figure 6 This is a schematic diagram of the position of the limiting protrusion on the top of the base plate of this utility model.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1-Base, 2-Micrometer, 21-Probe, 3-Detection lever, 31-Support frame, 4-Limiting rod, 41-, 5-Baffle, 6-Spring hinge, 7-Universal joint, 8-Mounting groove, 9-Limiting protrusion, 10-Cylindrical workpiece, 11-Magnet, 12-Horizontal center axis, 13-Vertical center axis. Detailed Implementation

[0037] Please see Figures 1 to 6 As shown, this utility model provides a fixture for inspecting the outer surface of a cylindrical workpiece. To better understand the above technical solution, the following will describe the above technical solution in detail with reference to the accompanying drawings and specific embodiments.

[0038] In a specific embodiment of the technical solution of this utility model:

[0039] It includes a base 1, a micrometer 2, a probe 21, a detection lever 3, a support frame 31, a limit rod 4, a baffle 5, and a spring hinge 6;

[0040] The base 1 is a horizontal support platform. The top plane of the base 1 has a horizontal central axis 12 and a vertical central axis 13. The horizontal central axis 12 and the vertical central axis 13 are for the convenience of description. In reality, there is no such object. They are just reference marks. There is a mounting groove 8 on each of the left and right sides of the base 1. The mounting groove 8 opens at the top of the base 1. The horizontal axis of the two mounting grooves 8 coincides with the horizontal central axis 12 of the base 1. The two mounting grooves 8 are symmetrically arranged on the left and right sides. The mounting grooves 8 do not penetrate the bottom of the base 1.

[0041] The two mounting slots 8 on the left and right are symmetrically arranged along the vertical central axis 13, and the mounting slots 8 are dovetail slots. The detection rod 3 and the limiting rod 4 are square stainless steel straight rods. The vertical inner sidewalls of the detection rod 3 and the limiting rod 4 are both provided with strip tenons. The detection rod 3 and the limiting rod 4 are slidably engaged with the mounting slots 8 through the strip tenons.

[0042] The upper opening of the mounting groove 8 is large, and it is clearance-fitted with the strip tenon of the detection rod 3 or the limiting rod 4. The lower opening of the mounting groove 8 is small and can be designed as a transition fit.

[0043] Both the detection rod 3 and the limiting rod 4 are straight rods. The detection rod 3 and the limiting rod 4 can be separably installed in any mounting groove 8. The detection rod 3 and the limiting rod 4 are in transition fit with the mounting groove 8.

[0044] Magnets 11 are embedded in the bottom and inner side of the mounting groove 8, and the magnets 11 are flush with the inner wall of the mounting groove 8.

[0045] Magnets 11 are also provided on the horizontal bottom surface and vertical inner side wall of the detection rod 3 and the limiting rod 4. The magnets 11 are embedded inside the detection rod 3 and the limiting rod 4, and the magnets 11 are flush with the surface of the detection rod 3 and the limiting rod 4.

[0046] The detection lever 3 or the limiting lever 4 is positioned by being attracted to the mounting groove 8 by the magnets 11 on the bottom and side walls;

[0047] An L-shaped bracket is vertically fixed to the top of the detection rod 3. Multiple universal joints 7 are set on the L-shaped bracket, and multiple support frames 31 are connected to form a complete L-shaped bracket through the universal joints 7.

[0048] The L-shaped bracket includes three support frames 31 and two universal joints 7, and the lowest support frame 31 is fixedly connected to the detection rod 3;

[0049] Two support frames 31 are set vertically, and a universal joint 7 is set between the two vertically set support frames 31;

[0050] A support frame 31 is arranged horizontally, and the horizontally arranged support frame 31 is connected to the upper end of the vertically arranged support frame 31 through another universal joint 7.

[0051] The angle between adjacent support frames 31 is adjusted by universal joint 7, and the adjacent support frames 31 are locked together by universal joint 7.

[0052] The micrometer 2 is connected to the detection lever 3 via an L-shaped bracket, and the detection end of the micrometer 2 is equipped with a probe 21;

[0053] The baffle 5 is a PVC board. The baffle 5 is a flat plate with an arc-shaped groove on the top. The diameter of the arc at the top of the baffle 5 is larger than the maximum outer diameter of the cylindrical workpiece 10. The baffle 5 is rotatably mounted on the top of the limiting rod 4 via the spring hinge 6. The arc-shaped groove at the top of the baffle 5 is a U-shaped groove. The baffle 5 continuously presses inward against the outer wall of the cylindrical workpiece 10 via the spring hinge 6.

[0054] The baffle 5 restricts the position of the cylindrical workpiece 10 by the spring hinge 6, and the torsion spring inside the spring hinge 6 keeps the baffle 5 pressed inward.

[0055] Two sets of limiting protrusions 9 are provided on the top of the base 1. The limiting protrusions 9 are circular protrusions protruding on the top of the base 1. The two sets of limiting protrusions 9 are respectively set on the left and right sides of the vertical central axis 13, and each set of limiting protrusions 9 is located inside the mounting groove 8.

[0056] Each set of limiting protrusions 9 has two, and the two limiting protrusions 9 in the same set are symmetrically distributed about the horizontal central axis 12. The spacing between the two sets of limiting protrusions 9 is different, that is, the distance of each set of limiting protrusions from the horizontal central axis 12 is not consistent, and the straight-line distance c between the two sets of limiting protrusions 9 and the vertical central axis 13 is the same; there are two sets of limiting protrusions 9, such as... Figure 6 The diagram shows two groups, left and right. Each group has two symmetrical limiting protrusions 9 that are separated by the horizontal central axis 12, which are used to abut and limit the cylindrical workpiece 10.

[0057] The limiting protrusion 9 is a cylinder made of PVC, and the diameter of the limiting protrusion 9 is between 5-15mm, and the height of the limiting protrusion 9 protruding from the top of the base 1 is between 3-7mm.

[0058] The cylindrical workpiece 10 has a circular hole inside, and the bottom of the circular hole inside the cylindrical workpiece 10 is fitted and limited by any set of limiting protrusions 9.

[0059] It should be noted that this device is only suitable for detecting the roundness and top parallelism of workpieces that are cylindrical on the outside and have an inner hole.

[0060] The top and bottom of the cylindrical workpiece 10 are both flat. It is necessary to check the parallelism of its top and bottom surfaces. By using a micrometer 2 to check the different heights of the top, the flatness and parallelism of the top and bottom surfaces can be checked.

[0061] When using this utility model, first select the inner diameter of the cylindrical workpiece 10 of this type and size, and then select the corresponding group of limiting protrusions 9 for positioning; then install the detection rod 3 and the limiting rod 4.

[0062] When the right limiting protrusion 9 is selected as the positioning detection position of the cylindrical workpiece 10, the detection rod 3 is slid down and inserted into the mounting groove 8 on the left, and the limiting rod 4 is slid down and inserted into the mounting groove 8 on the right, to ensure that the groove and the tenon are stably inserted.

[0063] The magnets 11 on the detection rod 3 and the limiting rod 4 are aligned with the magnets 11 in the mounting groove 8, and the magnets 11 at the corresponding positions attract each other, ensuring that the detection rod 3 and the limiting rod 4 are in a stable position after being inserted into the mounting groove 8.

[0064] Then, place the cylindrical workpiece 10, and make the inner hole of the cylindrical workpiece 10 fit tightly against the limiting protrusions 9 on both sides of the horizontal central axis 12. At the same time, make the inner wall of the cylindrical workpiece 10 fit against the two limiting protrusions 9 in the same group. Then, control the guard plate 5 to clamp the outer wall of the cylindrical workpiece 10, so that the cylindrical workpiece 10 cannot move outward. At this time, the inner side of the cylindrical workpiece 10 is abutted by the limiting protrusions 9, and the outer side is clamped by the guard plate 5, so that the cylindrical workpiece can no longer move horizontally and can only rotate. When the cylindrical workpiece 10 is manually supported and rotated, its vertical axis is restricted to keep its position unchanged.

[0065] The micrometer 2 and probe 21 are in contact with the surface of the cylindrical workpiece 10. During the rotation process, it can be checked whether the needle of the micrometer 2 fluctuates too much, or whether one side is thick and the other side is thin. The micrometer 2 can be conveniently observed and tested.

[0066] After the batch of cylindrical workpieces 10 is inspected, different specifications of products can be replaced. The positions of the inspection rod 3 and the limit rod 4 can be interchanged, which can flexibly accommodate cylindrical workpieces 10 of different sizes and specifications. As long as the size of the cylindrical workpiece 10 is smaller than the load limit of the base 1, this device can effectively and accurately inspect it.

[0067] The center of the base 1 referred to in this device refers to the horizontal central axis 12 and the vertical central axis 13, while the inner side refers to the side close to the center of the base 1, and the outer side refers to the side extending outward from the base 1. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to 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 this utility model.

[0068] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A fixture for inspecting the outer surface of a cylindrical workpiece, characterized in that, include: Base (1), micrometer (2), probe (21), detection lever (3), support frame (31), limit rod (4), baffle (5) and spring hinge (6); The base (1) is a horizontal support platform. There is a mounting groove (8) on each of the left and right sides of the base (1). The mounting groove (8) is open at the top of the base (1). The horizontal axis of the two mounting grooves (8) coincides with the horizontal central axis (12) of the base (1). The two mounting grooves (8) are symmetrically arranged. The mounting groove (8) does not penetrate the bottom of the base (1). The detection rod (3) and the limiting rod (4) are both straight rods. The detection rod (3) and the limiting rod (4) can be separably installed in any mounting groove (8). The detection rod (3) and the limiting rod (4) are in transition fit with the mounting groove (8). Magnets (11) are embedded in the bottom and inner side of the mounting groove (8), and the magnets (11) are flush with the inner wall of the mounting groove (8). The horizontal bottom surface and vertical inner wall of the detection rod (3) and the limiting rod (4) are also provided with magnets (11). The magnets (11) are embedded inside the detection rod (3) and the limiting rod (4). The magnets (11) are flush with the surfaces of the detection rod (3) and the limiting rod (4). The detection rod (3) or the limiting rod (4) is positioned by adsorption with the mounting groove (8) through the magnets (11) on the bottom and side walls; The top of the detection rod (3) is vertically fixed with an L-shaped bracket, and multiple universal joints (7) are provided on the L-shaped bracket. Multiple support frames (31) are connected to form a complete L-shaped bracket through the universal joints (7). The micrometer (2) is connected to the detection rod (3) via an L-shaped bracket, and the detection end of the micrometer (2) is equipped with a probe (21). The baffle (5) is a flat plate with an arc-shaped groove on the top. The baffle (5) is rotatably mounted on the top of the limiting rod (4) by a spring hinge (6). The arc-shaped groove on the top of the baffle (5) is a U-shaped groove. The baffle (5) continuously presses inward on the outer wall of the cylindrical workpiece (10) by the spring hinge (6). The base (1) has two sets of limiting protrusions (9) protruding from the top. The limiting protrusions (9) are circular protrusions protruding from the top of the base (1). The two sets of limiting protrusions (9) are respectively set on the left and right sides of the vertical central axis (13), and each set of limiting protrusions (9) is located inside the mounting groove (8). Each group of the limiting protrusions (9) has two, and the two limiting protrusions (9) in the same group are symmetrically distributed about the transverse central axis (12). The spacing between the two groups of limiting protrusions (9) is different.

2. The outer surface inspection fixture for a cylindrical workpiece according to claim 1, characterized in that: The L-shaped bracket includes three support frames (31) and two universal joints (7), and the lowest support frame (31) is fixedly connected to the detection rod (3); The two support frames (31) are vertically arranged, and a universal joint (7) is provided between the two vertically arranged support frames (31). One of the support frames (31) is arranged horizontally, and the horizontally arranged support frame (31) is connected to the upper end of the vertically arranged support frame (31) through another universal joint (7); The angle between adjacent support frames (31) is adjusted by universal joints (7), and the angle between adjacent support frames (31) is locked by universal joints (7).

3. The outer surface inspection fixture for a cylindrical workpiece according to claim 1, characterized in that: The baffle (5) is a PVC board, and the top arc diameter of the baffle (5) is greater than the maximum outer diameter of the cylindrical workpiece (10).

4. The outer surface inspection fixture for a cylindrical workpiece according to claim 1, characterized in that: The two mounting slots (8) on the left and right are symmetrically arranged along the vertical central axis (13), and the mounting slots (8) are dovetail slots. The detection rod (3) and the limiting rod (4) are square stainless steel rods. The inner sidewalls of the detection rod (3) and the limiting rod (4) are provided with strip tenons. The detection rod (3) and the limiting rod (4) are slidably engaged with the mounting slots (8) through the strip tenons.

5. The outer surface inspection fixture for a cylindrical workpiece according to claim 1, characterized in that: The limiting protrusion (9) is a cylinder made of PVC, and the diameter of the limiting protrusion (9) is between 5-15mm, and the height of the limiting protrusion (9) protruding from the top of the base (1) is between 3-7mm. The cylindrical workpiece (10) has a circular hole inside, and the bottom of the circular hole inside the cylindrical workpiece (10) is fitted and limited by any set of limiting protrusions (9).

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