CN207071803U - A kind of Special clamp device for being accurately positioned angle - Google Patents

Abstract

A kind of Special clamp device for being accurately positioned angle, including horizontally disposed bottom plate, correspondence is provided with two root posts on the left of bottom plate, horizontally rotate between two root posts and be connected with rotating shaft and lower rotary shaft, the framework being fixedly connected with upper rotating shaft directly over bottom plate, driver pinion is coaxially fixedly installed on lower rotary shaft, measure disk and rotating disk, the eccentric part of rotating disk is fixedly installed the handle parallel with lower rotary shaft, the driven gear wheel engaged with driver pinion is coaxially fixed with upper rotating shaft, the location locking mechanism of clamping corresponding with measurement disk is provided with the left of bottom plate；Installing plate is equipped with framework, slidable adjustment formula supporting mechanism is provided between installing plate and bottom plate.The utility model design advantages of simple, compact-sized, operating with for milling machine or " knife-axial controlling " at three axis machining center can be better met, have that orientation angle precision is high, while easy to operate advantage.

Description

A special fixture device for precise positioning angle

technical field

The utility model belongs to the technical field of mechanical processing, and in particular relates to a special fixture device for precise positioning angles of milling surfaces of milling machines and three-axis numerical control machining centers.

Background technique

With the rapid development of aviation, aerospace, military industry, automobile and medical equipment and other industries, the application of molds of various shapes is becoming more and more extensive, especially the processing of curved surfaces is more prominent. This puts forward higher requirements for "tool axis control" (tool inclination angle control). Due to the flexibility of the tool axis inclination strategy, it directly affects the machining path. Therefore, it plays an important role. Although the five-axis machining center has achieved better tool axis control, the processing cost of using the five-axis machining center is relatively high. For milling machines and even three-axis CNC machining centers, there is no fixture for convenient adjustment and positioning of the inclination angle of the workpiece, so it is still impossible to process workpiece surfaces with a certain inclination angle (the tool is inclined relative to the workpiece).

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a special fixture device with precise positioning angle, which is easy to operate, high in positioning accuracy, suitable for milling machines or three-axis CNC machining centers, and reduces processing costs.

In order to solve the above technical problems, the utility model adopts the following technical scheme: a special fixture device for precise positioning angle, including a horizontally arranged bottom plate, two uprights are arranged correspondingly on the left side of the bottom plate, and there is a horizontal rotation connection between the two uprights. The upper shaft and the lower shaft, the upper shaft is fixedly connected with the frame directly above the bottom plate, the lower shaft is coaxially fixed with the driving pinion, the measuring disc and the turntable, and the eccentric part of the turntable is fixed with a handle parallel to the lower shaft, The upper rotating shaft is coaxially fixed with a driven gear that meshes with the driving pinion, and the left side of the bottom plate is provided with a positioning and locking mechanism corresponding to the measuring disc;

Two vertical rods are arranged at intervals along the front and rear directions on the bottom plate, and the upper ends of the two vertical rods are respectively supported on the bottom of the front side and the rear side of the frame, and the frame is in a horizontal state at this time;

A mounting plate is laid on the frame, and a sliding adjustable support mechanism is set between the mounting plate and the bottom plate. A rectangular chute is provided on the mounting plate. The cross section of the chute is an inverted T-shaped structure. There are at least four fastening bolts protruding upward from the mounting plate. A rectangular mounting frame is set on the mounting plate. A circle of limit pressure plates is set on the upper edge of the mounting frame. The left and right sides of the mounting frame are respectively provided with cylindrical pin holes. , the lower surface of the limit pressure plate is provided with a V-shaped positioning block, the tip of the V-shaped positioning block is set downward, the rear side of the installation frame is threaded with a jacking screw, and the upper end of the fastening bolt passes through the limit pressure plate and then the installation is fixed through the fastening nut. The frame is clamped and positioned on the mounting plate.

The positioning and locking mechanism includes a fixed plate parallel to the measuring disc. The lower edge of the fixed plate is fixed on the bottom plate. The lower side of the fixed plate is rotatably connected with a rotating rod parallel to the fixed plate. The center of the arc-shaped hole coincides with the center of rotation of the rotating rod. The rotating rod is provided with a locking bolt that passes through the arc-shaped hole and is tightly connected with the fixed plate. The upper end of the rotating rod is provided with a guide groove along the length direction of the rotating rod. A telescopic block is slidingly arranged in the guide groove, and a first spring is arranged between the bottom of the telescopic block and the bottom of the guide groove. A long guide hole opposite to the measuring disc is provided on the upper part of the rotating rod, and the inner side of the long guide hole is connected with the guide groove. A casing parallel to the lower rotating shaft is fixedly connected, and a push rod is inserted coaxially in the casing. There are 360 positioning holes arranged in a circular array around the rotation center of the measuring disc. The end of the ejector rod facing the dial is a sharp structure, and the sharp structure is inserted into the positioning hole correspondingly.

The sliding adjustable support mechanism includes a front movable support and a rear movable support which are symmetrically arranged front and back; A slide rail, the slider is slidably connected to the slide rail through a dovetail structure, the upper end of the upper support sleeve is hinged on the slider, the lower end of the lower support sleeve is hinged on the bottom plate, the upper end of the support rod is threaded into the upper support sleeve, and the lower end of the support rod is inserted into the And threaded inside the upper end of the support tube, the thread rotation direction of the upper end of the support rod is opposite to that of the lower end of the support rod, a rotating wrench is provided on the support rod, the lower end of the support tube is inserted in the lower support sleeve, the thread It is connected with a positioning bolt that is pressure-fitted with the slide rail.

With the above technical scheme, the bottom plate is installed on the workbench of the milling machine or three-axis machining center, and the workpiece is placed on the mounting plate in the installation frame, so that the top of the workpiece contacts the tip of the V-shaped positioning block, forming the surface of the workpiece and the V-shaped The line contact of the positioning block, install the cylindrical pins in the cylindrical pin holes on the left and right sides of the installation frame respectively, turn the jacking screw at the rear end of the mounting frame, the jacking screw tightens the workpiece, and finally tighten the fastening nut to make the limit pressure plate press The workpiece can be tightened so that the workpiece can be precisely clamped and positioned. When the workpiece reaches the required inclination angle, since the driven large gear is coaxially fixedly connected to the upper rotating shaft, the left side of the frame is fixedly connected to the upper rotating shaft, and the mounting plate is set on the frame, the driving small gear and driven large gear can be pre-set. The diameter ratio (such as 1:6), according to the gear meshing theorem, calculate the angle that the pinion needs to rotate, first press the ejector rod to overcome the elastic force of the second spring, so that the sharp structure of the ejector rod is out of a certain position on the measuring disc hole, and then rotate the handle to drive the measuring disc to rotate; when the angle between the mounting plate and the bottom plate reaches the theoretically calculated angle, stop the rotation, loosen the locking bolt, turn the rotating rod, and overcome the elastic force of the first spring to make the telescopic The block moves along the length direction of the rotating rod, that is, the ejector rod moves along the length direction of the rotating rod, so that the sharp structure of the ejector rod can be inserted into a suitable positioning hole, and then the locking bolt is tightened, and then the positioning bolt Loosen, move the slider to a suitable position along the slide rail, tighten the positioning bolt to position the slider on the slide rail, then thread the upper end of the support rod into the upper support sleeve, and hold the rotating wrench to drive the support rod to rotate, because the upper end of the support rod The thread rotation direction of the upper part is opposite to the thread rotation direction of the lower end of the support rod, so that the upper support sleeve and the support tube, which are respectively threaded with the upper and lower ends of the support rod, move back along the axial direction of the support rod, and the support rod and the support After the tube supports the frame firmly (so that the load of the workpiece falls on the support rod and the support tube), stop driving and turn the wrench.

In addition, the fastening bolts can move along the chute on the mounting plate, and the mounting frames of different sizes can be replaced to clamp workpieces of different sizes and shapes.

360 positioning holes are set on the measuring disc adopted by the utility model, and the included angle between adjacent positioning holes is 1°, and an angle scale is also marked between two adjacent positioning holes, and through the first spring, the second Second, the stretching of the spring adjusts the position of the ejector rod so that the sharp structure of the ejector rod is correspondingly inserted into the positioning hole, thereby improving the positioning accuracy.

When the frame and the mounting plate are at the level, the support rod and the support tube are removed, and the frame is supported by two vertical rods. At this time, the sharp structure at the end of the ejector rod is inserted into the corresponding positioning hole.

To sum up, the utility model has a simple and reasonable design and a compact structure, which can better meet the operation and use of the "cutter axis control" of a milling machine or a three-axis machining center. It has the advantages of high positioning angle accuracy and convenient operation.

Description of drawings

Fig. 1 is the structural representation of the utility model after removing the mounting frame, the support rod and the support tube;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is a schematic structural view of the utility model when it has a mounting frame, a support rod and a support tube;

Fig. 5 is a schematic plan view of the measuring disc in the utility model;

Figure 6 is an enlarged view of the positioning and locking mechanism in Figure 3;

Fig. 7 is the right view of Fig. 6;

FIG. 8 is an enlarged view of the mounting frame shown in FIG. 4 .

Detailed ways

As shown in Figures 1 to 8, a special fixture device for precise positioning angles of the utility model includes a horizontally arranged base plate 1, and two columns 2 are correspondingly arranged on the left side of the base plate 1, and the two columns 2 are horizontally arranged. The upper rotating shaft 3 and the lower rotating shaft 4 are connected in rotation, the upper rotating shaft 3 is fixedly connected with the frame 5 located directly above the bottom plate 1, and the lower rotating shaft 4 is coaxially fixed with the driving pinion 6, the measuring disc 7 and the rotating disc 8, and the rotating disc 8 A handle 41 parallel to the lower rotating shaft 4 is fixedly arranged at the eccentric part of the upper rotating shaft 3, and a driven large gear 9 meshing with the driving pinion 6 is coaxially fixed on the upper rotating shaft 3. The positioning locking mechanism 10.

Two vertical rods 11 are arranged at intervals along the front and rear directions on the bottom plate 1, and the upper ends of the two vertical rods 11 are respectively supported on the bottom of the front side and the rear side of the frame 5, and the frame 5 is in a horizontal state at this moment;

A mounting plate 12 is laid on the frame 5, and a sliding adjustable support mechanism is provided between the mounting plate 12 and the bottom plate 1. A rectangular chute 13 is provided on the mounting plate 12, and the cross section of the chute 13 is an inverted T-shaped structure. At least four fastening bolts 14 protruding upward from the mounting plate 12 are slidably arranged in the chute 13, a rectangular mounting frame 15 is provided on the mounting plate 12, and a circle of limit pressure plates 19 are provided on the upper edge of the mounting frame 15. , the left side and the right side of the mounting frame 15 are respectively provided with cylindrical pin holes 16, the lower surface of the limit plate 19 is provided with a V-shaped positioning block 17, the tip of the V-shaped positioning block 17 is set downward, and the rear side of the mounting frame 15 is threaded A top screw 18 is connected, and the upper end of the fastening bolt 14 passes through the limiting pressure plate 19 to press and position the mounting frame 15 on the mounting plate 12 through the fastening nut 40 .

The positioning locking mechanism 10 includes a fixed plate 20 parallel to the measuring disc 7, the lower edge of the fixed plate 20 is fixed on the base plate 1, and the lower side of the fixed plate 20 is rotatably connected with a rotating rod 21 parallel to the fixed plate 20. The fixed plate 20 The upper part is provided with a front and rear transparent arc-shaped hole 22. The center of the arc-shaped hole 22 coincides with the rotation center of the rotating rod 21. The rotating rod 21 is provided with a locking mechanism that passes through the arc-shaped hole 22 and is firmly connected with the fixed plate 20. Bolt 23, the upper end of the rotating rod 21 is provided with a guide groove along the length direction of the rotating rod 21, a telescopic block 24 is slidably arranged in the guide groove, a first spring 25 is arranged between the bottom of the telescopic block 24 and the bottom of the guide groove, and the rotating rod 21 top is provided with There is a guiding long hole 26 opposite to the measuring disc 7, the inner side of the guiding long hole 26 communicates with the guide groove, the telescopic block 24 is fixedly connected with a sleeve 27 parallel to the lower rotating shaft 4, and a top is inserted coaxially in the sleeve 27. The rod 28, the middle part of the casing 27 is provided with a limit block 29, and the inner end of the push rod 28 is press-fitted with the limit block 29 through the second spring 30, and the circumferential surface of the measuring disc 7 is provided with 360 circular arrays around the center of rotation of the measuring disc 7. One positioning hole 31, one end of the push rod 28 facing the dial is a sharp structure 32, and the sharp structure 32 is correspondingly inserted in the positioning hole 31.

The sliding adjustable support mechanism includes a front movable support and a rear movable support which are symmetrically arranged front and back; A slide rail 38 is provided on the side along the left and right directions, and the slide block 33 is slidably connected to the slide rail 38 through a dovetail structure. 36 upper ends are threaded in the upper support sleeve 35, the lower end of the support rod 36 is inserted and threaded inside the upper end of the support pipe 37, the thread direction of the upper end of the support rod 36 is opposite to that of the lower end of the support rod 36, the support rod 36 A rotary wrench is provided on the top, and the lower end of the support tube 37 is inserted in the lower support sleeve 34 , and the upper slide block 33 is threaded with a positioning bolt 39 that is press-fitted with the slide rail 38 .

The bottom plate 1 is installed on the workbench of the milling machine or three-axis machining center, and the workpiece is placed on the mounting plate 12 in the mounting frame 15, so that the top of the workpiece contacts the tip of the V-shaped positioning block 17, forming the surface of the workpiece and the V-shaped positioning. The line contact of block 17, the cylindrical pin holes 16 on the left side and the right side of the mounting frame 15 are respectively installed with cylindrical pins, the jacking wire 18 at the rear end of the mounting frame 15 is screwed, the jacking wire 18 is tight against the workpiece, and finally the fastening nut 40 is tightened , so that the limit pressing plate 19 is pressed against the workpiece, and the workpiece is precisely clamped and positioned. When the workpiece is about to reach the required inclination angle, since the driven gear 9 is coaxially fixedly connected to the upper shaft 3, the left side of the frame 5 is fixedly connected to the upper shaft 3, and the mounting plate 12 is arranged on the frame 5, the active small gear can be pre-determined. The diameter ratio between the gear 6 and the driven gear 9 (such as 1:6) can be calculated according to the gear meshing theorem, and the angle that the pinion needs to rotate can be calculated. First, press the push rod 28 to overcome the elastic force of the second spring 30, so that the push rod 28 The sharp structure 32 breaks away from a certain positioning hole 31 on the measuring disc 7, and then rotates the handle 41 to drive the measuring disc 7 to rotate; when the angle between the mounting plate 12 and the base plate 1 reaches the theoretically calculated angle, stop the rotation, loosen the Unlock the locking bolt 23, turn the rotating rod 21, and overcome the elastic force of the first spring 25 to make the telescopic block 24 move along the length direction of the rotating rod 21, that is, the push rod 28 moves along the length direction of the rotating rod 21, so that the pushing rod 28 can be moved The sharp structure of the rod 28 is correspondingly inserted into a suitable positioning hole 31, then tighten the locking bolt 23, then loosen the positioning bolt 39, move the slider 33 to a suitable position along the slide rail 38, tighten the positioning bolt 39 to make the sliding The block 33 is positioned on the slide rail 38, then the upper end of the support rod 36 is screwed into the upper support sleeve 35, and the hand-held rotating wrench drives the support rod 36 to rotate. The thread direction is opposite, so that the upper support sleeve 35 and the support pipe 37 which are screwed to the upper and lower ends of the support rod 36 respectively move away from each other along the axial direction of the support rod 36, and the support rod 36 and the support pipe 37 support the frame 5 (make the load of workpiece fall on support bar 36 and support tube 37) after being firm, stop driving and rotating wrench.

In addition, the fastening bolts 14 can move along the chute 13 on the mounting plate 12 to replace the mounting frames 15 of different sizes to clamp workpieces of different sizes and shapes.

360 positioning holes 31 are set on the measuring disc 7 adopted by the utility model, and the included angle between adjacent positioning holes 31 is 1°, and an angle scale is also marked between adjacent two positioning holes 31, and passed through the first The stretching of the first spring 25 and the second spring 30 adjusts the position of the push rod 28 so that the sharp structure 32 of the push rod 28 is correspondingly inserted into the positioning hole 31, thereby improving the positioning accuracy.

When the frame and the mounting plate 12 are horizontal, the support rod 36 and the support pipe 37 are removed, and the frame is supported by two vertical rods 11. At this time, the sharp structure 32 at the end of the push rod 28 is inserted into the corresponding positioning hole 31.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model belong to the technology of the utility model. protection scope of the program.

Claims (3)

1. A kind of 1. Special clamp device for being accurately positioned angle, it is characterised in that：Including horizontally disposed bottom plate, on the left of bottom plate before After be correspondingly arranged on two root posts, horizontally rotate between two root posts and be connected with rotating shaft and lower rotary shaft, it is fixed in upper rotating shaft to connect The framework being located at directly over bottom plate is connected to, driver pinion, measurement disk and rotating disk are coaxially fixedly installed on lower rotary shaft, rotating disk Eccentric part is fixedly installed the handle parallel with lower rotary shaft, be coaxially fixed with upper rotating shaft engaged with driver pinion it is driven Gear wheel, bottom plate left side are provided with the location locking mechanism of clamping corresponding with measurement disk；

   Two vertical rods are arranged at intervals with bottom plate along the longitudinal direction, the upper end of two vertical rods is respectively supported at the front side of framework with after The bottom of side, now framework be in horizontality；

   Installing plate is equipped with framework, slidable adjustment formula supporting mechanism is provided between installing plate and bottom plate, is opened up on installing plate There is overall rectangular chute, the cross section of chute is in inverted T-type structure, slides to be provided with chute and stretches out installing plate extremely upwards Lack four fastening bolts, rectangular installing frame is provided with installing plate, the upper side edge edge of installing frame is provided with the spacing pressure of a circle Plate, installing frame left side and right side are respectively equipped with cylinder pin hole, and spacing pressing plate lower surface is provided with V-type locating piece, V-type locating piece Pointed end is set, and is threaded with jackscrew on rear side of installing frame, and fastening bolt upper end is passed through after spacing pressing plate by fastening spiral shell It is female that installing frame is compressed into positioning on a mounting board.
2. A kind of 2. Special clamp device for being accurately positioned angle according to claim 1, it is characterised in that：Positioning and locking machine Structure includes the fixed plate parallel to measurement disk, and fixed plate lower edge is fixed and is located on bottom plate, and fixed plate following side is rotatably connected to The bull stick parallel with fixed plate, fixed plate top offer front and rear penetrating arcuate socket, the center of arcuate socket and the revolution of bull stick Center superposition, arcuate socket and the clamping screw being fastenedly connected with fixed plate, bull stick upper end edge bull stick length are provided through on bull stick Degree direction offers guide groove, is slided in guide groove and is provided with telescopic block, the first bullet is provided between telescopic block bottom and guide groove bottom Spring, bull stick top offers the long guiding hole relative with measurement disk, connected on the inside of long guiding hole with guide groove, fixed in telescopic block to connect It is connected to the sleeve pipe parallel with lower rotary shaft, coaxial in sleeve pipe to be inserted with push rod, middle part is provided with limited block in sleeve pipe, and push rod is inner Coordinated by second spring and limited block top pressure, measurement disk circumferential surface is provided with around measurement disk centre of gyration circular array 360 positioning holes, push rod are pointed structures towards one end of dial, and pointed structures corresponding inserted is in positioning hole.
3. A kind of 3. Special clamp device for being accurately positioned angle according to claim 1, it is characterised in that：Slidable adjustment formula Supporting mechanism includes front and rear symmetrically arranged preceding active supporting piece and rear active supporting piece；Preceding active supporting piece include sliding block, under Support set, upper support set, support bar and support tube, framework front side offer a slide rail in left-right direction, and sliding block passes through dovetail Structure is slidably connected on slide rail, and upper support set upper side is hinged on sliding block, and lower support set lower end is hinged on bottom plate, support bar Threaded upper ends are connected in support set, and support bar lower end is inserted and is threaded in inside support tube upper end, post upper With the thread rotary orientation of support bar bottom on the contrary, support bar is provided with rotating spanner, support tube lower end plugs the thread rotary orientation in portion The bolt coordinated with slide rail top pressure is threaded with lower support set, on sliding block.