A kind of fixture for fine grinding inner hole of mandrel

Abstract

The utility model provides a mandrel inner hole fine grinding fixture, comprising a sliding assembly, a first support rod, a first bracket rod, a second bracket rod and a second support rod. The sliding assembly comprises a guide rod and a slide seat, and a hole body is penetrated on the slide seat to form a working area; the first support rod is fixed on the slide seat, and the end of the first support rod extends into the working area, and there are two first support rods, and a first spacing is provided between the two first support rods; a first locking block is provided on the first bracket rod; a dynamic bracket is rotatably installed on the second bracket rod, and a second locking block is provided at the end of the dynamic bracket; the second support rod is fixed on the dynamic bracket, and there are two second support rods, and a second spacing is provided between the two first support rods. The mandrel inner hole fine grinding fixture of the utility model has a compact structure, convenient loading and unloading, labor saving, and easy operation, high processing accuracy and efficiency, and a wide range of applications.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a core shaft inner hole fine grinding clamp tooling. Background Art

[0002] Regarding precision products such as shaft cores, due to the high precision requirements of the final product, the accuracy of product parts needs to be controlled during the process, especially the shaft core, which is the main component that directly affects the accuracy of the entire product.

[0003] An automobile mandrel has an inner hole. During the processing, the inner hole needs to be finely ground. The fixture structure in the traditional process is complex, the operation is inconvenient, and the processing efficiency is low. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a core shaft inner hole fine grinding fixture with compact structure, convenient operation, high processing accuracy and efficiency.

[0005] The utility model provides a mandrel inner hole fine grinding fixture, which comprises:

[0006] The sliding assembly includes a guide rod 9 and a slide seat 1. The guide rods 9 are two and arranged horizontally. The slide seat 1 is horizontally slidably mounted on the guide rods 9. A hole is penetrated through the slide seat 1 to form a working area 10.

[0007] A first support rod 7, fixed on the slide 1, for contacting the head of the mandrel, the end of the first support rod 7 extending into the working area 10, the first support rod 7 is two and arranged in parallel, and a first distance is provided between the two first support rods 7;

[0008] A first support rod 11, fixed on the slide 1 and parallel to the sliding direction of the slide 1, and a first locking block 3 is provided on the first support rod 11;

[0009] A second support rod 12 is fixed on the slide 1 and parallel to the first support rod 11, a dynamic support 5 is rotatably mounted on the second support rod 12, and a second locking block 51 is provided at the end of the dynamic support 5, which can be connected with the first locking block 3 and locked and fixed;

[0010] The second support rod 6 is fixed on the dynamic bracket 5 and is used to contact the tail of the core shaft. The second support rods 6 are two and are arranged in parallel. A second distance is set between the two first support rods 7. When the dynamic bracket 5 rotates to the first limit position, the second locking block 51 contacts the first locking block 3 and can be locked. The first distance is coaxial with the second distance and can allow the fine grinding rod on the machine tool to pass through.

[0011] Furthermore, the first locking block 3 and the movable bracket 5 are slidably fitted on the first bracket rod 11 and the second bracket rod 12 respectively and are locked and fixed by bolts.

[0012] Furthermore, a hinge seat 4 is provided on the second bracket rod 12, and the hinge seat 4 is slidably fitted on the second bracket rod 12 and fixed by bolts. The dynamic bracket 5 is hinged on the hinge seat 4, and the rotation axis of the dynamic bracket 5 is parallel to the axis of the second bracket rod 12.

[0013] Furthermore, the first support rod 7 is detachably mounted on the slide seat 1 , and the second support rod 6 is detachably mounted on the movable bracket 5 .

[0014] Furthermore, when the movable bracket rotates to the first limit position, the first support rod 7 is parallel to the second support rod 6 .

[0015] Furthermore, it also includes a limiting rod that can be sleeved on the core shaft, and the first bracket rod 11 is provided with a limiting support seat 2 that can contact with the limiting rod and achieve radial limitation.

[0016] Furthermore, the first support rod 7 and the second support rod 6 are arranged facing each other.

[0017] Furthermore, the side wall of the first locking block 3 is provided with a locking groove 31 facing the second bracket rod 12, the locking groove 31 is strip-shaped, and its upper end passes through the outside of the first locking block 3; the second locking block 51 is strip-shaped and can be inserted into the locking groove 31 to achieve axial limitation.

[0018] Furthermore, a locking hole 52 is provided at the end of the movable bracket 5 to allow the upper end of the first locking block 3 to be inserted and achieve axial limitation.

[0019] Furthermore, a lever 53 for driving the movable bracket 5 to rotate is provided at the end of the movable bracket 5 .

[0020] The advantages of the utility model are: the mandrel inner hole fine grinding fixture of the utility model is provided with a slide seat, which can realize horizontal sliding, is convenient for loading and unloading of workpieces, and has high work efficiency; the double locking block structure is adopted, which can realize rapid axial locking, and no manual locking is required, the operation is simple, the work efficiency is high, the locking effect is good, and the bearing capacity is large and the safety is high; the detachable structure can realize rapid replacement according to different mandrels and has a wide range of applications; a lever is provided to facilitate the rotation of the movable bracket, which is convenient to operate, labor-saving, and has high safety; the mandrel inner hole fine grinding fixture of the utility model has a compact structure, is convenient for loading and unloading, labor-saving, and easy to operate, has high processing accuracy and efficiency, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a structural schematic diagram of the mandrel inner hole fine grinding fixture of the utility model;

[0022] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0023] Figure 3 This is a schematic structural diagram of another angle of the core shaft inner hole fine grinding fixture of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the first locking block of the mandrel inner hole fine grinding fixture of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the limit support seat of the core shaft inner hole fine grinding fixture of the utility model;

[0026] Figure 6 It is a schematic diagram of the structure of the movable support of the core shaft inner hole fine grinding fixture of the utility model;

[0027] Figure 7 This is a schematic diagram of the working state structure of the core shaft inner hole fine grinding fixture of the utility model;

[0028] Figure 8 This is a front view of the working state of the core shaft inner hole fine grinding fixture of the utility model. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the present utility model in conjunction with the accompanying drawings.

[0030] See also Figure 1-Figure 8 The utility model provides a core shaft inner hole fine grinding fixture, which includes a sliding assembly, a first support rod 7, a first bracket rod 11, a second bracket rod 12 and a second support rod 6.

[0031] The sliding assembly includes a guide rod 9 and a slide 1. There are two guide rods 9 and they are horizontally arranged. They are installed on the machine tool. The slide 1 is horizontally slidably fitted on the guide rod 9. The sliding direction of the slide 1 is parallel to the rotation axis of the main shaft of the machine tool. A hole body is penetrated on the slide 1, which forms a working area 10 for inner hole fine grinding operations. In this embodiment, the slide 1 is a plate structure, which is vertically arranged. Guide sleeves 14 are provided at both ends of the slide, which can accommodate the guide rod 9 to pass through and realize sliding fitting. A hole body is provided at the center of the plate body. The axis of the hole body is parallel to its sliding axis, and its upper end penetrates out of the plate body to form a U-shaped hole structure, which serves as a working area.

[0032] The first support rod 7 is fixed on the slide 1, and the end of the first support rod 7 extends into the working area 10. There are two first support rods 7 and they are arranged in parallel. A first distance is set between the two first support rods 7. The first support rod 7 can contact with the head of the core shaft, thereby realizing axial limitation of the core shaft. At the same time, the inner hole fine grinding rod on the machine tool spindle can pass through the first distance to realize fine grinding; the cross-section of the first support rod 7 is rectangular, and it is detachably mounted on the front end of the slide 1 by bolts. In this embodiment, the side facing away from the machine tool spindle is the front, and the side facing the machine tool spindle is the rear, which is convenient for quick loading and unloading of the first support rod 7, so as to realize the replacement of the first support rod, thereby meeting the fine grinding processing of different apertures.

[0033] The first bracket rod 11 is fixed on the slide 1, specifically, it is fixed at the front end of the slide 1, it is horizontally arranged and parallel to the sliding direction of the slide 1, and a first locking block 3 is provided on the first bracket rod 11; in this embodiment, the first locking block 3 is slidably fitted on the first bracket rod 11 and is fastened and fixed by bolts, and it can adjust the distance between it and the first support rod 7 to achieve axial distance adjustment to meet the use of core shafts of different lengths; specifically, the locking block is a rectangular structure, and a locking groove 31 is provided on the side wall of the first locking block 3, and the locking groove 31 faces the second bracket rod 12, which is a vertically arranged strip structure, and its upper end passes through the outside of the first locking block 3.

[0034] The second bracket rod 12 is fixed on the slide seat 1. Specifically, it is fixed on the front end of the slide seat 1. It is parallel to the first bracket rod 11. In this embodiment, it is located on the same horizontal plane as the first bracket rod 11. A movable bracket 5 is rotatably installed on the second bracket rod 12. Specifically, a hinge seat 4 is provided on the second bracket rod 12. The hinge seat 4 is slidably fitted on the second bracket rod 12. It is fixed by bolt locking. The movable bracket 5 is hinged on the hinge seat 4. The rotation axis of the movable bracket 5 is parallel to the axis of the second bracket rod 12. When in use, the first locking block and the movable bracket are adjusted to the same radial plane. A second locking block 51 is provided at the end of the movable bracket 5. The second locking block 51 can be connected with the first locking block 3 to achieve locking and fixing. The second locking block 51 is strip-shaped, which can be inserted into the locking groove 31 to achieve axial limitation. The above-mentioned first bracket rod and the second bracket rod are located on both sides of the working area; the above-mentioned movable bracket is an arc-shaped structure protruding upward.

[0035] The second support rod 6 is fixed on the dynamic bracket 5, and the second support rod 6 is two and arranged in parallel. A second spacing is provided between the two first support rods 7, and the second support rod is used to contact with the tail of the core shaft, and cooperates with the first support rod to achieve axial limitation of the core shaft, and the above-mentioned second spacing is the same as the first spacing; when the dynamic bracket 5 rotates to the first limit position, that is, in the working state, the second locking block 51 contacts the first locking block 3 and can be locked. At this time, the second support rod can withstand axial force, and at this time, the first spacing is coaxial with the second spacing, which can allow the fine grinding rod on the machine tool to pass through, thereby realizing inner hole fine grinding; in this embodiment, the second support rod 6 is detachably mounted on the dynamic bracket 5 by bolts, and preferably, it is fixed at the rear end of the dynamic bracket to form an opposite arrangement with the first support rod 7; when the dynamic bracket rotates to the first limit position (working state), the first support rod 7 is parallel to the second support rod 6, and the first support rod is arranged vertically upward, and at this time, the second support rod is arranged vertically downward.

[0036] In order to increase the axial force, in the present application, a clamping hole 52 is provided at the end of the movable bracket 5, and the clamping hole can accommodate the upper end of the first locking block 3 to be inserted, thereby realizing axial limiting, which can improve the connection strength between the first locking block and the second locking block, avoid loosening or loosening, and is safe and reliable to use; at the same time, in order to facilitate operation, a lever 53 is provided at the end of the movable bracket 5, and the lever 53 is arranged on the side close to the second locking block, which is used to drive the movable bracket 5 to rotate and realize fast loading and unloading operations.

[0037] In order to prevent the core shaft from rotating, the present embodiment also includes a limit rod, and the end of the limit rod is provided with a sleeve hole, the axis of the sleeve hole is perpendicular to the length direction of the limit rod, and it can be sleeved on the core shaft. At the same time, a limit support seat 2 is provided on the first bracket rod 11, and the limit support seat 2 can contact the limit rod, thereby realizing radial limitation of the core shaft; the limit support seat 2 includes a support seat body 21 installed on the first bracket rod 11, and a support plate 22 is fixed to the upper end of the support seat body by bolts, and a first strip hole 221 and a second strip hole 220 are opened. The bolt is connected to the support seat body after passing through the first strip hole, and a protrusion 211 is provided on the top surface of the support seat body, and the protrusion is slidably fitted in the second strip hole, which can realize horizontal adjustment of the support plate and facilitate replacement of the support plate to meet different usage requirements.

[0038] A pull rod 13 is provided at the rear end of the slide, which is used to connect with the driving device to achieve sliding drive of the slide.

[0039] During operation, the fine grinding rod is located between the first spacing of the two first support rods 7, the limit rod is sleeved on the core shaft, and the core shaft is sleeved on the fine grinding rod, and the end of the limit rod is placed on the limit support seat at the same time to achieve radial limitation of the core shaft, and then the movable bracket is rotated to the working state, the first locking block contacts the second locking block, and axial limitation is achieved. At this time, the two ends of the core shaft are respectively in contact with the first support rod and the second support rod to achieve axial limitation; the driving device drives the slide seat to reciprocate horizontally, so that the fine grinding rod reciprocates axially in the shaft hole during the rotation process to achieve fine grinding; after completion, the movable bracket rotates in the opposite direction to disengage the second support rod from the core shaft, and at this time, the core shaft can be moved axially out.

[0040] The utility model discloses a fixture for fine grinding the inner hole of a mandrel, and a sliding seat is provided to realize horizontal sliding, so that the workpiece can be loaded and unloaded conveniently and the working efficiency is high; a double locking block structure is adopted to realize rapid axial locking, and manual locking is not required, so the operation is simple, the working efficiency is high, the locking effect is good, the bearing capacity is large, and the safety is high; the detachable structure can realize rapid replacement according to different mandrels, and the application range is wide; a lever is provided to facilitate the rotation of the movable bracket, and the operation is convenient, labor-saving, and the safety is high; the fixture for fine grinding the inner hole of a mandrel of the utility model has a compact structure, and the loading and unloading is convenient, labor-saving, and the operation is convenient, the processing accuracy and efficiency are high, and the application range is wide.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A fine grinding fixture for the inner hole of a mandrel, characterized in that: include: The sliding assembly comprises a guide rod and a slide seat, wherein the guide rods are two and arranged horizontally, the slide seat is horizontally slidably mounted on the guide rods, and a hole body is penetrated through the slide seat to form a working area; A first support rod, fixed on the slide seat, used to contact the head of the mandrel, the end of the first support rod extends into the working area, there are two first support rods and they are arranged in parallel, and a first distance is set between the two first support rods; A first support rod, fixed on the slide seat and parallel to the sliding direction of the slide seat, and a first locking block is provided on the first support rod; A second support rod is fixed on the slide and parallel to the first support rod, a dynamic support is rotatably mounted on the second support rod, and a second locking block is provided at the end of the dynamic support that can be connected to the first locking block and locked and fixed; The second support rod is fixed on the dynamic support and is used to contact the tail of the core shaft. There are two second support rods and they are arranged in parallel. A second distance is set between the two first support rods. When the dynamic support rotates to the first limit position, the second locking block contacts the first locking block and can be locked. The first distance is coaxial with the second distance and can allow the fine grinding rod on the machine tool to pass through.

2. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: The first locking block and the movable bracket are slidably fitted on the first bracket rod and the second bracket rod respectively and are locked and fixed by bolts.

3. The core shaft inner hole fine grinding fixture according to claim 1, characterized in that: The second bracket rod is provided with a hinge seat, which is slidably fitted on the second bracket rod and fixed by bolts. The movable bracket is hinged on the hinge seat, and the rotation axis of the movable bracket is parallel to the axis of the second bracket rod.

4. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: The first support rod is detachably mounted on the slide seat, and the second support rod is detachably mounted on the movable bracket.

5. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: When the movable bracket rotates to a first limit position, the first support rod is parallel to the second support rod.

6. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: It also includes a limiting rod that can be sleeved on the core shaft, and the first bracket rod is provided with a limiting support seat that can contact with the limiting rod and achieve radial limiting.

7. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: The first support rod and the second support rod are arranged facing each other.

8. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: The side wall of the first locking block is provided with a locking groove facing the second bracket rod, the locking groove is strip-shaped, and its upper end passes through the outside of the first locking block; the second locking block is strip-shaped and can be inserted into the locking groove to achieve axial limitation.

9. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: The end of the movable bracket is provided with a clamping hole capable of accommodating the upper end of the first locking block to be inserted and realizing axial limiting.

10. The core shaft inner hole fine grinding fixture as claimed in claim 1, characterized in that: A shifting rod for shifting the movable bracket to rotate is provided at the end of the movable bracket.

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