阅读说明：本技术 一种用于柱形工件的无级可调定位装置 (Stepless adjustable positioning device for cylindrical workpiece ) 是由 秦仕雄 杨鑫 罗付强 蔡源 陆涛 杨健 于 2019-11-20 设计创作，主要内容包括：本发明公开了一种用于柱形工件的无级可调定位装置,包括由上至下依次设置的顶板、中间板和底板,所述顶板和底板固定连接,两者之间形成容中间板水平滑动的腔室；所述顶板上设有多个第一过孔,所述中间板在与第一定位孔相对应的位置上设有第二过孔；所述第一过孔内壁设有第一定位部,所述第二过孔内壁设有第二定位部,柱形工件一端依次穿过第一过孔和第二过孔抵靠于底板上,通过第一定位部和第二定位部配合压紧定位。其结构简单,通用性强,换产简单快速。(The invention discloses a stepless adjustable positioning device for a cylindrical workpiece, which comprises a top plate, a middle plate and a bottom plate which are sequentially arranged from top to bottom, wherein the top plate and the bottom plate are fixedly connected, and a cavity for accommodating the middle plate to horizontally slide is formed between the top plate and the bottom plate; the top plate is provided with a plurality of first through holes, and the middle plate is provided with second through holes at positions corresponding to the first positioning holes; the first through hole inner wall is provided with a first positioning part, the second through hole inner wall is provided with a second positioning part, one end of the columnar workpiece sequentially penetrates through the first through hole and the second through hole to be abutted against the bottom plate, and the columnar workpiece is pressed and positioned in a matched mode through the first positioning part and the second positioning part. The structure is simple, the universality is strong, and the production change is simple and quick.)

1. A stepless adjustable positioner for cylindricality work piece which characterized in that: the device comprises a top plate (1), a middle plate (2) and a bottom plate (3) which are sequentially arranged from top to bottom, wherein the top plate (1) and the bottom plate (3) are fixedly connected, and a chamber for accommodating the middle plate (2) to horizontally slide is formed between the top plate and the bottom plate;

a plurality of first through holes (11) are formed in the top plate (1), and second through holes (21) are formed in the middle plate (2) at positions corresponding to the first positioning holes (11);

first via hole (11) inner wall is equipped with first location portion (12), second via hole (21) inner wall is equipped with second location portion (22), and first via hole (11) and second via hole (21) are passed in proper order to cylindricality work piece (8) one end and lean on the bottom plate, compress tightly the location through first location portion (12) and the cooperation of second location portion (22).

2. The infinitely adjustable positioning device for cylindrical workpieces according to claim 1, characterized in that: one section of the first positioning part (12) and the second positioning part (22) is V-shaped, and the other section of the first positioning part and the second positioning part is arc-shaped.

3. Infinitely adjustable positioning device for cylindrical workpieces according to claim 1 or 2, characterized in that: middle plate (3) top surface fixedly connected with spacer pin (5), be equipped with spacing spout (6) on roof (1) and the position that spacer pin (5) correspond, spacer pin (5) pass spacing spout (6) and can follow spacing spout (6) and remove.

4. Infinitely adjustable positioning device for cylindrical workpieces according to claim 1 or 2, characterized in that: the number of the intermediate plates (2) is multiple, and the intermediate plates are adjusted according to the size of the cylindrical workpiece (8).

Technical Field

The invention relates to a tool clamp, in particular to a stepless adjustable positioning device for a cylindrical workpiece.

Background

In the face of the processing of more and more cylindrical workpieces with different diameters, people are constantly exploring and using a tray with strong universality and rapid positioning to meet the requirement of the current part structure with various diameters. In the field of automatic feeding and discharging, most of the existing charging trays for automatic feeding and discharging in machining are single in size, can only be used for positioning a part, are special for special trays and are poor in universality. When a machine tool changes a machined product, an automatic feeding and discharging tray needs to be changed along with the machine tool, so that the number of parts is increased, the number of trays is increased, each part is positioned by a different positioning point, and a robot machining program is provided for each part.

In the actual use process, the risk of taking a wrong tray or adjusting a wrong processing program exists, the whole time from tray replacement → debugging → processing is too long, and the production cost is increased. Therefore, the special mode for the special disc is suitable for single-variety flow line processing, such as an electronic factory or an automobile accessory manufacturing factory. However, when the discrete multi-variety processing is required, the special disc is not very suitable, so that the investment cost is increased, the debugging time is prolonged, and the debugging risk is increased. In order to deal with the current situation of various machining, a cylindrical workpiece positioning device which is strong in universality and simple and quick in production change needs to be developed.

Disclosure of Invention

The invention aims to provide a stepless adjustable positioning device for a cylindrical workpiece, which is simple in structure, strong in universality and simple and quick in production change.

The invention relates to a stepless adjustable positioning device for a cylindrical workpiece, which comprises a top plate, a middle plate and a bottom plate which are sequentially arranged from top to bottom, wherein the top plate and the bottom plate are fixedly connected, and a cavity for accommodating the middle plate to horizontally slide is formed between the top plate and the bottom plate; the top plate is provided with a plurality of first through holes, and the middle plate is provided with second through holes at positions corresponding to the first positioning holes; the inner wall of the first through hole is provided with a first positioning part, the second through hole is internally provided with a second positioning part, one end of the columnar workpiece sequentially penetrates through the first through hole and the second through hole to be abutted against the bottom plate, and the columnar workpiece is pressed and positioned in a matched mode through the first positioning part and the second positioning part.

Further, one section of the first positioning part and the second positioning part is V-shaped, and the other section of the first positioning part and the second positioning part is arc-shaped.

Furthermore, the top surface of the middle plate is fixedly connected with a limiting pin, a limiting sliding groove is formed in the position, corresponding to the limiting pin, of the top plate, and the limiting pin penetrates through the limiting sliding groove and can move along the limiting sliding groove.

Furthermore, the number of the middle plates is multiple, and the middle plates are adjusted according to the size of the cylindrical workpiece.

During the specific use, at first pass first via hole and second via hole with the cylindricality work piece in proper order and lean on in the bottom plate, then slide the intermediate lamella for the first location portion of first via hole and the second location portion of second via hole act on the cylindricality work piece lateral wall simultaneously, realize quick location.

Compared with the prior art, the invention has the following beneficial effects.

1. According to the invention, the cylindrical workpieces are positioned by matching the first positioning part of the first through hole and the second positioning part of the second through hole, the structure is simple, the operation is convenient, the positioning requirements of a plurality of cylindrical workpieces with different diameters can be met, the production change speed is improved, and the production and manufacturing cost is reduced.

2. According to the invention, one section of the first positioning part and the second positioning part is V-shaped, the other section of the first positioning part and the second positioning part is arc-shaped, the V-shaped positioning part and the side wall of the cylindrical workpiece are provided with two contact points, the arc-shaped positioning part and the side wall of the cylindrical workpiece are provided with one contact point, the accurate positioning of the cylindrical workpiece is realized by utilizing the principle that one circle can be uniquely determined by three points which are not on the same line, the center coordinates of the cylindrical workpiece are convenient to determine, the quick positioning programming of the cylindrical workpieces with all diameters can be met by only one processing program, the production change time is shortened, and the production efficiency is.

3. According to the invention, the top surface of the middle plate is fixedly connected with the limiting pin, and the limiting pin penetrates through the limiting sliding groove in the top plate and can move along the limiting sliding groove, so that the middle plate can be driven to horizontally move in the cavity between the top plate and the bottom plate, and the phenomenon that the first through hole and the second through hole cannot be matched and positioned due to excessive movement of the middle plate is avoided.

Drawings

FIG. 1 is an axial schematic view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a schematic view of the positioning of a cylindrical workpiece according to the present invention;

FIG. 5 is a sectional view A-A of FIG. 4;

FIG. 6 is a schematic view of the center coordinates of a cylindrical workpiece according to the present invention;

FIG. 7 is a schematic illustration of the operation of the spacing pin of the present invention;

fig. 8 is a sectional view B-B of fig. 7.

In the figure, 1-top plate, 11-first via hole, 12-first positioning part, 2-intermediate plate, 21-second via hole, 22-second positioning part, 3-bottom plate, 4-fixing plate, 5-limiting pin, 6-limiting sliding groove, 7-bolt, and 8-cylindrical workpiece.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 8, the stepless adjustable positioning device for cylindrical workpieces comprises a top plate 1, a middle plate 2 and a bottom plate 3 which are sequentially arranged from top to bottom, wherein the top plate 1 and the bottom plate 3 are rectangular, and the whole device can be designed into a round shape or other shapes according to the number and size of the workpieces. The left and right side walls of the top plate 1 and the bottom plate 3 are respectively connected through a fixing plate 4, and a chamber for horizontally sliding the middle plate 2 is formed between the top plate 1 and the bottom plate 3. In order to facilitate installation and disassembly and facilitate later maintenance, the fixing plate 4 is connected with the top plate 1 and the bottom plate 3 through bolts 7.

Be equipped with 88 first via holes 11 on roof 1, first via hole 11 is 11 rows, 8 rows evenly distributed on roof 1. The middle plate 2 is provided with a second through hole 21 at a position corresponding to the first positioning hole 11; first via hole 11 inner wall integrated into one piece has first location portion 12, second via hole 21 inner wall integrated into one piece has second location portion 22, and cylindricality work piece 8 one end passes first via hole 11 and second via hole 21 in proper order and supports and lean on bottom plate 3, compresses tightly the location through the cooperation of first location portion 12 and second location portion 22. It should be noted that the number of the intermediate plates 2 can be plural, and is adjusted according to the size of the cylindrical workpiece 8.

The first positioning portion 12 has a V-shaped cross section, and the second positioning portion 22 has an arc-shaped cross section. During specific positioning, the V-shaped first positioning portion 12 and the side wall of the cylindrical workpiece 8 are provided with two contact points, the arc-shaped second positioning portion 22 and the side wall of the cylindrical workpiece 8 are provided with one contact point, accurate positioning of the cylindrical workpiece 8 is achieved by the aid of the principle that one circle can be determined only by three points which are not located on the same line, positioning requirements of the cylindrical workpieces 8 with different diameters can be met by the aid of one set of positioning device, production change time is shortened, universality is high, and production and manufacturing cost is reduced.

The left edge and the right edge of the top surface of the middle plate 2 are fixedly connected with limit pins 5, limit chutes 6 which are arranged along the front direction and the rear direction are arranged on the positions of the top plate 1 corresponding to the limit pins 5, and the limit pins 5 penetrate through the limit chutes 6 and can move along the limit chutes 6. The lower end of the limiting pin 5 is in interference fit with the mounting hole of the middle plate 2, or the lower end of the limiting pin 5 is in threaded connection with the middle plate 2, so that the limiting pin 5 and the middle plate 2 do not slide relatively, and the upper part of the limiting pin 5 is in sliding fit with the limiting sliding groove 6. An operator can stir the limiting pin 5 along the limiting sliding groove 6 to drive the middle plate 2 to move forwards and backwards.

Referring to fig. 6, the calculation of the circle center coordinate values of the cylindrical workpieces 8 first establishes a two-dimensional coordinate system, taking the left-right direction as the X axis, the front-back direction as the Y axis, the V-shaped angle of the first positioning portion 12 as θ, the diameter of the workpiece as e, and knowing that the coordinates of the V-shaped corner point T corresponding to the first cylindrical workpiece 8 at the lower left corner are (a, b), it can be obtained according to a trigonometric function:

from the trigonometric function we can obtain:

the length h of the cylindrical workpiece 8 from the circle center to the known point in the Y direction is obtained as follows:

the center coordinates of the first cylindrical workpiece 8 can be obtained

Setting the distance between two adjacent V-shaped first positioning portions 12 in the X direction as a constant c, which is defined as "row"; the distance between two adjacent V-shaped first positioning portions 12 in the Y direction is a fixed value constant d, defined as "column", and the circle center coordinates (J, K) of the cylindrical workpiece 8 in the mth row and nth column are obtained as follows:

J＝a+c(m-1)

the coordinates of the center of the cylindrical workpiece 8 in the m-th row and n-th column are:

the position of the point to be solved R is 7 rows and 5 columns, and the coordinate of the point to be solved R is obtained by substituting the formula:

from the above formula, it can be seen that: a. b is the coordinate value of the known point T, theta is the angle of the V-shaped first positioning part, c and d are the spacing values in the direction X, Y, which are all known fixed constants, so that the center coordinate of each cylindrical workpiece only has a relation with the diameter of the cylindrical workpiece, and the center coordinate value of the cylindrical workpieces with different diameters can be quickly obtained by the formula. Meanwhile, only one machining program is needed to meet the requirement of quick positioning programming of the circle centers of the parts with all diameters.

During specific work, the cylindrical workpiece 8 sequentially passes through the first through hole 11 and the second through hole 21 to be abutted against the bottom plate 3, then the limiting pin 5 is stirred, the limiting pin 5 moves back and forth along the limiting sliding groove 6 to drive the middle plate 2 to horizontally slide in the cavity between the top plate 1 and the bottom plate 3, the first positioning portion 12 of the first through hole 11 and the second positioning portion 22 of the second through hole 21 act on the side wall of the cylindrical workpiece 8 simultaneously, and quick positioning is achieved. The positioning device is convenient and quick to operate, can meet the positioning requirements of cylindrical workpieces with different diameters, is high in universality, shortens the production change time, improves the positioning efficiency, and reduces the production and manufacturing cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.