Positioning device for inner circle of workpiece

Abstract

The invention provides a positioning device for an inner circle of a workpiece. The positioning device for the inner circle of the workpiece comprises a base and a plurality of T-shaped sliding blocks in sliding fit with the base. At least one positioning block is fixedly arranged on each T-shaped sliding block, and a stand column is fixedly arranged on the upper end face of each positioning block. A first pin hole is formed in each positioning block, a second pin hole is formed in the end, away from the positioning block, of each stand column, and the first pin holes and the second pin holes extend in the radial direction of the base; holes matched with the first pin hole and the second pin hole are formed in the inner circular surface of the workpiece; and the pin holes and the holes are connected through positioning pins. The positioning device is good in universality, low in cost, reliable in limiting and capable of being used for positioning inner circles of different sizes.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machine tool processing, in particular to a device for positioning the inner circle of a workpiece during numerical control machine tool processing. Background Art

[0002] In the field of machining, for the machining of rotating workpieces, the inner circle of the rotating workpiece must first be used as a reference before machining the remaining features. Therefore, it is particularly important to clamp and position the inner circle of the workpiece. If the inner circle reference cannot be used well for positioning, the machining quality of other features of the workpiece cannot be guaranteed. In the prior art, for the machining of such workpieces, universal tooling such as pressure plates, jacks, side tops, etc. is usually used for position limiting and clamping. Although this method has good versatility, it cannot guarantee the reliability of the position limiting, especially for the machining of some precision parts. The machining accuracy cannot be guaranteed; special tooling is made for specific products for clamping and positioning, such as making locating pins and bases that match the workpiece. Although this method has relatively high reliability of position limiting and clamping, it is not universal and can only be used for machining a single product, and the cost is high. Summary of the invention

[0003] Based on this, it is necessary to provide a device for positioning the inner circle of a rotating workpiece in order to address the problem of inaccurate reference positioning of the inner circle of the rotating workpiece in the prior art or high cost. The positioning device has good versatility, low cost, and reliable limiting, and can be used for positioning inner circles of different sizes.

[0004] A positioning device for the inner circle of a workpiece, the device for positioning the inner circle of a workpiece comprising a base and a plurality of T-shaped sliders slidably matched with the base; at least one positioning block is fixedly arranged on each of the T-shaped sliders, and a column is fixedly arranged on the upper end surface of each of the positioning blocks; a first pin hole is arranged on each of the positioning blocks, and a second pin hole is arranged at one end of each of the columns away from the positioning block, and the first pin hole and the second pin hole both extend radially along the base; a hole matching the first pin hole and the second pin hole is arranged on the inner circle surface of the workpiece; and each of the pin holes and the hole are connected by a positioning pin.

[0005] Furthermore, two mutually perpendicular T-slots are arranged on the base, and the T-slot slider can slide along the T-slots.

[0006] Furthermore, a surface of the positioning block close to the inner circle of the workpiece is processed into an arc shape.

[0007] Furthermore, a surface of the column close to the inner circle of the workpiece is processed into an arc shape.

[0008] Furthermore, the two free surfaces of the T-shaped sliding block are processed into arc surfaces parallel to each other.

[0009] Furthermore, scale lines are arranged on the edge of each T-slot.

[0010] Furthermore, each T-shaped slide block is positioned by a micrometer on a numerically controlled machine tool so that the distance between each T-shaped slide block and the edge of the base is the same.

[0011] Furthermore, the diameters of the first pin hole, the second pin hole and the hole are all the same.

[0012] Furthermore, two positioning blocks are fixedly arranged on each of the T-shaped sliding blocks.

[0013] Furthermore, the column and the positioning block are integrally formed or welded.

[0014] The present invention provides a positioning device for the inner circle of a workpiece, in which a positioning mechanism is slidably connected to a base, and the relative position of a T-shaped slider and the base can be adjusted to meet the positioning of inner circle references of different sizes, and is suitable for positioning inner circle references of different workpieces; in addition, in the device, a pin hole on the positioning device and a hole on the inner circle are connected by a positioning pin, so the positioning is reliable, and the workpiece is completely limited by two groups of upper and lower positioning pins and multiple axial positioning pins, thereby ensuring the accuracy of workpiece processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A top view of a positioning device for the inner circle of a workpiece according to the present invention;

[0016] Figure 2 It is a structural schematic diagram of a positioning device for the inner circle of a workpiece according to the present invention;

[0017] Figure 3 The present invention is an assembly diagram of a positioning device used in a workpiece.

[0018] Reference numerals

[0019] 100, base, 200, T-shaped slider, 300, positioning pin, 400, workpiece, 110, T-shaped slot, 210, positioning block, 220, column, 410, inner circular surface, 211, first pin hole, 221, second pin hole, 411, hole. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0021] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] The present invention provides a positioning device for the inner circle of a workpiece, comprising a base and a plurality of T-shaped sliding blocks slidably matched with the base; at least one positioning block is fixedly arranged on each of the T-shaped sliding blocks, and a column is fixedly arranged on the upper end surface of each of the positioning blocks; a first pin hole is arranged on each of the positioning blocks, and a second pin hole is arranged at one end of each of the columns away from the positioning block, and the first pin hole and the second pin hole both extend radially along the base; a hole matching the first pin hole and the second pin hole is arranged on the inner circle surface of the workpiece, and each of the pin holes is connected to the hole by a positioning pin.

[0024] The present invention provides a positioning device for the inner circle of a workpiece, in which a positioning mechanism is slidably connected to a base, and the relative position of a T-shaped slider and the base can be adjusted to meet the positioning of inner circle references of different sizes, and the device is suitable for positioning inner circle references of different workpieces; in addition, when positioning, the device sleeves the inner circle of the workpiece on the periphery of the positioning device, moves the position of each T-shaped slider, makes each positioning block abut against the lower end of the inner circle of the workpiece, makes the column abut against the upper end of the inner circle, rotates the workpiece or the positioning device, aligns the first pin hole with the corresponding hole, and aligns the second pin hole with the corresponding hole, inserts the positioning pin into the first pin hole and the corresponding hole, and inserts the remaining positioning pins into the second pin hole and the corresponding hole, thereby completing the limiting of the workpiece inner circle reference re-positioning device, and positioning the workpiece in various directions by multiple positioning pins, thereby preventing the workpiece from being offset due to the force during processing, thereby ensuring the stability and accuracy of workpiece processing.

[0025] The positioning device for the inner circle of a workpiece is described below in conjunction with specific embodiments to further understand the inventive concept of the positioning device for the inner circle of a workpiece.

[0026] In one embodiment, if Figure 1-3 As shown, a positioning device for the inner circle of a workpiece includes a base 100 and a plurality of T-shaped sliders 200 slidably matched with the base 100; at least one positioning block 210 is fixedly arranged on each of the T-shaped sliders 200, and a column 220 is fixedly arranged on the upper end surface of each of the positioning blocks 210; specifically, the positioning block 210 and the T-shaped slider 200 can be fixedly connected by bolts, and the column 220 and the positioning block 210 can be integrally formed or connected by welding. The positioning block 210 is provided with a first pin hole 211, and each of the columns is provided with a second pin hole 221 at one end away from the positioning block 210, the first pin hole 211 and the second pin hole 221 both extend in the radial direction of the base 100, the first pin hole 211 and the second pin hole 221 are both through holes, the first pin hole 211 on the same positioning block 210 and the second pin hole 221 of the column 220 thereon are located on the same vertical plane; holes 411 matching the first pin hole 211 and the second pin hole 221 are provided on the inner circular surface 410 of the workpiece 400, the holes 411 are divided into upper and lower rows, the holes 411 in the upper and lower rows are respectively located on the same plane, the holes 411 in each row are distributed at equal intervals, and the number of holes 411 is greater than the number of pin holes on all the columns 220 or the positioning block 210, so as to facilitate the alignment of the pin holes and the holes 411. When positioning the workpiece 400, firstly sleeve the inner circle of the workpiece on the outer periphery of each column 220, so that the bottom of the workpiece contacts the base, and the positioning block 210 is located at the lower end of the inner circle of the workpiece, slide each T-shaped slider 200, so that the column 220 abuts against the upper side of the inner circle, and the positioning block 210 abuts against the lower side of the inner circle, and then rotate the workpiece or positioning device to align the first pin hole 211 with its corresponding hole 411. Since the first pin hole 221 and the second pin hole 211 are located on the same vertical plane, the second pin hole 221 is also aligned with its corresponding hole 411 at this time, and the positioning pin 300 is inserted into the first pin hole 211 and its corresponding hole 411, and the second pin hole 221 and its corresponding hole 411, thereby completing the positioning of the inner circle reference of the workpiece. Fix the positioning device at the processing position of the CNC machine tool, start the CNC machine tool, and start processing the rest of the workpiece.

[0027] In another embodiment, if Figure 1As shown, the base 100 is provided with two mutually perpendicular T-slots 110, and the T-slot slider 200 can slide along the T-slots 110. Specifically, the two mutually perpendicular T-slots 110 intersect at the center of the base 100, and four T-slots 110 can be formed with the intersection as the boundary, and each T-slot is equipped with a T-slot slider 200, and each T-slot slider 200 can slide along its corresponding T-slot 110, thereby driving the positioning block 210 and the column 220 fixed on the T-slot slider 200 to move synchronously, so as to adjust the diameter of the outer circular surface formed by the positioning block 210 and the column 220 to match the positioning of the inner circle reference of different diameters.

[0028] In another embodiment, if Figure 1-2 As shown, the side of the positioning block 210 close to the inner circle of the workpiece is processed into an arc shape, and the side of the column 220 close to the inner circle of the workpiece is processed into an arc shape; the two free surfaces of the T-shaped slider 200 are processed into mutually parallel arcs. By setting the surfaces of the positioning block 210 and the column 220 that contact the inner circle surface of the workpiece to be arc-shaped, it is ensured that the workpiece and the positioning block 210, the column 220 and the inner circle surface of the workpiece are completely in contact, and the inner circle surface of the workpiece will not be worn during the processing process.

[0029] In another embodiment, if Figure 1 As shown, the two free surfaces of the T-shaped slider 200 are processed into arc surfaces parallel to each other, and scale lines are set at the edges of each T-shaped slot 110. In the present invention, by setting scale lines at the edges of each T-shaped slot 110, it is convenient to position each T-shaped slider 200, ensure that each T-shaped slider 200 is on the same circular surface, and then ensure that each positioning block 210 and each column 220 are located on the same circular surface, so that each positioning block 210, column 220 fits well with the inner circle of the workpiece. By processing the two free surfaces of the T-shaped slider 200 into arc surfaces, so that they are parallel to the arc surfaces of the positioning block 210 and the column 220, after adjusting the position of each T-shaped slider 200 to a certain scale, it is ensured that each positioning block 210 and the column 220 are on the same circular surface.

[0030] In another embodiment, the positioning device of the inner circle of the workpiece is matched on a CNC machine tool, so that the CNC machine tool can process the remaining parts of the workpiece. During the processing, the micrometer on the CNC machine tool can be used to position each of the T-shaped sliders 200, and the position of each of the T-shaped sliders 200 can be adjusted to ensure that the distance between each of the T-shaped sliders 200 and the edge of the base 100 is the same, so that each of the T-shaped sliders 200 is on the same circular surface, thereby ensuring that each of the positioning blocks 210 is located on the same circular surface, and each of the columns 220 is also located on the same circular surface.

[0031] In another embodiment, the diameters of the first pin hole 211, the second pin hole 221 and the hole 411 are all the same, and are all loosely matched with the locating pin 300, ensuring that the locating pin 300 can be inserted into the first pin hole 211 and its corresponding hole 411, or the second pin hole 221 and its corresponding hole 411, and ensuring that the locating pin 300 can fit well with the first pin hole 211 and the hole 411, or fit well with the second pin hole 221 and the hole 411, thereby ensuring that the workpiece will not loosen during the processing.

[0032] In another embodiment, if Figure 1 As shown, two positioning blocks 210 are fixedly arranged on each of the T-shaped slide blocks 200. That is, the positioning device includes a total of 8 positioning blocks 210, namely 8 columns 220, to ensure that the inner circle of the workpiece is aligned in all directions.

[0033] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A positioning device for the inner circle of a workpiece, characterized in that: The device for positioning the inner circle of a workpiece comprises a base (100) and a plurality of T-shaped slide blocks (200) slidably matched with the base (100); at least one positioning block (210) is fixedly arranged on each of the T-shaped slide blocks (200), and a column (220) is fixedly arranged on the upper end surface of each of the positioning blocks (210); a first pin hole (211) is arranged on each of the positioning blocks (210), and a second pin hole (221) is arranged at one end of each of the columns (220) away from the positioning block (210), and the first pin hole (211) and the second pin hole (221) both extend in the radial direction of the base (100); a hole (411) matching the first pin hole (211) and the second pin hole (221) is arranged on the inner circle surface (410) of the workpiece (400); and a positioning pin (300) is used to connect each of the pin holes (211, 221) and the hole (411).

2. A positioning device for the inner circle of a workpiece according to claim 1, characterized in that: The base (100) is provided with two mutually perpendicular T-shaped slots (110), and the T-shaped sliding block (200) can slide along the T-shaped slots (110).

3. A device for positioning the inner circle of a workpiece according to claim 1, characterized in that: A surface of the positioning block (210) close to the inner circle of the workpiece is processed into an arc shape.

4. A positioning device for the inner circle of a workpiece according to claim 1, characterized in that: The side of the column (220) close to the inner circle of the workpiece is processed into an arc shape.

5. A positioning device for the inner circle of a workpiece according to claim 2, characterized in that: The two free surfaces of the T-shaped sliding block (200) are both processed into circular arc surfaces parallel to each other.

6. A positioning device for the inner circle of a workpiece according to claim 2, characterized in that: The edges of each T-shaped slot (110) are provided with scale lines.

7. A positioning device for the inner circle of a workpiece according to claim 2, characterized in that: Each T-shaped slide block (200) is positioned by using a micrometer on a numerically controlled machine tool so that the distance between each T-shaped slide block (200) and the edge of the base (100) is the same.

8. A positioning device for the inner circle of a workpiece according to claim 1, characterized in that: The diameters of the first pin hole (211), the second pin hole (221) and the hole (411) are all the same.

9. A positioning device for the inner circle of a workpiece according to claim 1, characterized in that: Two positioning blocks (210) are fixedly arranged on each of the T-shaped slide blocks (200).

10. A workpiece inner circle positioning device according to claim 1, characterized in that: The upright column (220) and the positioning block (210) are integrally formed or welded.

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