JPH04122409U - A workpiece support device having a workpiece support means that can move forward and backward. - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To provide a machine tool equipped with a workpiece support means that can move forward and backward, allowing a long workpiece to be attached to and removed from a processing position in a minimum space. [Structure] A first draw tube that is movable in the axial direction of the main shaft within the main shaft that is pivotally supported on the base of the machine tool, and a rod that passes through the first draw tube and has a work support member on the front end side. A second draw tube extending inside the rod is disposed, and a drive body is provided on the rear end side of the second draw tube and the rod for moving the rod forward and backward in the direction of the main axis within the first draw tube. arranging a drive cylinder that operates the workpiece support member via a rod, and inserting the workpiece support member into the inner peripheral part of the elongated workpiece set on the front end side of the main shaft and the first draw tube,
The workpiece is held in a predetermined position by the operation of the drive cylinder.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea uses a turning machine to turn the edge of a long workpiece with a deep hole. When machining a center hole using a machine, grip the inner edge of a long workpiece. The present invention relates to a workpiece support device having a workpiece support means that can move forward and backward.

0002

[Conventional technology]

Machining the outer peripheral edge of a long workpiece with a deep hole using a turning machine tool There are cases. During such machining, the long workpiece is held by supporting two points at both ends of the workpiece. This was done by holding. For this purpose, the shaft of the collet device is attached to the inner circumference of the workpiece. Insert the end of the workpiece on the side opposite to the main shaft to the inner circumference of the workpiece using a collet chuck. The center was also found and machined while it was supported on the circumferential surface. Then Tails The center is pushed by the center attached to the tock, and the center support part on the spindle side and The workpiece is supported by the center support part on the tail stock side, and the outer periphery of the workpiece is It was processed using machine tools.

0003

[Problem that the idea aims to solve]

However, with conventional workpiece support devices, it is difficult to fix the end of a long workpiece on the side opposite to the main shaft. The workpiece support means protrudes from the spindle side to the machining area side, so the workpiece support The workpiece is carried into the machining area at a position that does not interfere with the holding means, and the axis of the workpiece supporting means is Visually align the center with the center of the workpiece, then move the workpiece in the direction of the spindle axis. , After inserting the workpiece support means into the inner circumference of the workpiece, the workpiece is supported by the workpiece support means. It was fixed. In other words, when attaching or detaching a workpiece, the machine tool To avoid interference between the tool stock and the workpiece, the axial dimension of the workpiece should be approximately 2. It requires twice as many sliding parts, etc., and the machine tool must be moved by the axial dimension of the workpiece. The point arose. As a result, the time required to load and unload workpieces increases, and machine tools become larger due to larger machine tools. There was a problem in that the price of the machine increased due to the increase in the size of the main parts of the machine. This invention was created to solve the above problems, and its purpose and purpose The purpose of this feature is to allow long workpieces to be attached and detached with minimal space, and to reduce workpiece attachment and detachment time. It has a workpiece support means that can move forward and backward to reduce the size of the machine tool and prevent it from becoming larger. It is an object of the present invention to provide a work supporting device that allows

0004

[Means to solve the problem]

The above-mentioned problem of this invention was achieved with the following configuration. The main shaft is rotatably supported on the base of the machine tool, and the , a first draw tube movable in the axial direction of the main shaft with respect to the main shaft; Extending in the axial direction of the shaft and penetrating the first draw tube, a second drawch that is slidable in the main axis direction within the first draw tube; a second draw tube; a second draw tube; a rod movable in the axial direction of the main shaft; and a rod movable in the axial direction of the main shaft; The first draw tube is provided on the rear end side between the draw tube and the main shaft. a first driving body to be moved; a front end between the main shaft and the first draw tube; is provided on the side, and moves forward and backward by relative movement between the main shaft and the first draw tube. a fixing means for fixing the moved second draw tube; and a fixing means for fixing the moved second draw tube; provided on the rear end side between the draw tube and the rod, and connected to the second draw tube. a second drive body that moves the rod by moving the rod; a second drive body that moves the rod; provided on the front end side between the second draw tube and the rod, and A workpiece support means for fixing a workpiece by anti-movement, and a workpiece support means provided on the base of the machine tool. and the workpiece support means via the second draw tube and the rod. and a third driving body that moves the workpiece supporting means forward and backward in the direction of the spindle axis. Attach and detach the workpiece at the position where the This is a configuration in which the workpiece is fixed at a position advanced toward the side opposite to the main shaft.

[0005]

[Effect]

With the above configuration, the operator can hold the long workpiece W between the main shaft and the first draw tube. is installed at a predetermined position on the distal end side of the draw tube, and the second draw tube and the rod are moved forward in the direction of the spindle axis, and a workpiece support hand installed on the tip side of these Insert the step into the inner circumference of the workpiece W and bring the opening of the workpiece W into contact with the tip of the spindle side. let The second draw tube and rod are then moved into place by a third driver. Move the second draw tube and rod forward a fixed amount to near the innermost part of the workpiece. Insert up to Then, the second driver is actuated, and the second driver is connected to the second driver. The work supporting means is actuated by the forward movement of the rod and the work supporting means, and the workpiece is Securely fix the inner circumference of the workpiece from the inner circumference side of the workpiece W. The inner circumference of the workpiece is fixed. Then, the first drive member is actuated to move the first droplet to the main shaft by the fixing means. - Fix the tube and drill the center hole.

[0006]

【Example】

The following is a workpiece support device having a workpiece support means that can move forward and backward according to this invention. An embodiment of the device will be described based on the drawings. Figure 1 is an overall side view of the work supporting device according to this invention, and Figure 2 is an overall side view of the work supporting device according to this invention. FIG. 3 is a partially enlarged sectional view of the work supporting means side, and FIG. 3 is an enlarged view of the drive body side of the work supporting device. It is a large sectional view. 1 is a main shaft rotatably supported by the main spindle head H of the machine tool, 2 is a shaft inside the main shaft 1 3 is a first draw tube that is provided to be movable forward and backward in the linear direction; A second draw tube 4 moves back and forth in the direction of the main shaft axis within the low tube 2. It is a rod that penetrates inside the second draw tube 3 and moves forward and backward in the direction of the main shaft axis. Ru. 5 is a control by moving the first draw tube 2 forward and backward with respect to the main shaft 1. Open and close the let 29 (Fig. 2) and grasp the second draw tube 3 inside. This is a known stationary type collet chuck that is fixed in place. 6 is the second door By moving the rod 4 forward and backward with respect to the low tube 3, the A plurality of pressing members 22 (FIG. 2) expand in the radial direction (increase in diameter) and press the inner circumference of the workpiece W. This is a workpiece support means that presses and supports the workpiece. 7 is provided at the rear of the main shaft 1. A hollow chuck which is a first driving body that drives the first draw tube 2 against the The cylinder is made up of a cylinder 7a and a rotary joint 7b. 8 is provided at the rear of the second draw tube 3 and is connected to the second draw tube 3. On the other hand, it is a chuck cylinder that is a second driving body that drives the rod 4. 9 is a rodless cylinder which is the third driving body, and this rodless cylinder 9 is When actuated, the second draw tube 3 and the rotor are drawn through the sliding shoe 9a. The pad 4 and the chuck cylinder 8 are moved in the direction of the spindle axis. this rod A guide bar is installed near the rodless cylinder 9 in parallel to the moving direction of the rodless cylinder 9. 11 is provided, and a guide ring 12 is slidably inserted therein. 11a is strike By adjusting the position of this stopper 11a, the rod can be moved according to the workpiece support position. The forward position of the res cylinder 9 can be adjusted. The guide ring 12 has Shifter 13 is fixed. Also, a bearing is provided for the second draw tube 3. The ring 15 is fitted into a groove of a ring 14 which is rotatably mounted by a ring 15. Reference numeral 10 denotes a base body to which a rodless cylinder 9 and the like are fixed. Perpendicular to the base 10 A guide member 19 is attached to the plate 10a via a sleeve 18 and a bearing 16. a, which guides the second draw tube 3 in the axial direction. Ru.

[0007] The collet chuck 5 includes a chuck body 28, a cap 27, a sleeve 30 and and collet 29, etc., in the axial direction of the first draw tube 2. movement in the radial direction of the collet 29 due to the tapered portion of the sleeve 30 and the collet 29. The second draw tube passing through the inner circumference of the collet 29 opens and closes. Grip or release 3. A detailed explanation will be omitted here. In the hollow type chuck cylinder 7, the chuck cylinder body is connected via an adapter 31. is fixed to the main shaft 1, and a piston rod (not shown) is in contact with the first draw tube 2. The first draw tube 2 is connected to the main shaft 1 and drives the first draw tube 2 with respect to the main shaft 1. Further explanation will be omitted. The chuck cylinder 8 has a chuck cylinder main body connected to a second It is fixed to the draw tube 3, and a piston rod (not shown) is connected to the rod 4. , which drives the rod 4 with respect to the second draw tube 3, but a detailed explanation is given below. is omitted.

[0008] The work supporting means 6 will be explained in detail. A shaft body 4a having a plurality of grooves 4b equally spaced around the outer circumference is screwed onto the tip of the rod 4. and is integrated with the rod 4. In each of the grooves 4b provided on the outer periphery, there are inclined grooves. A fixed inclined member 20 having a slope is fixedly installed. A position facing each groove 4b A cylindrical body 3a having a through groove 3b carved therein is provided in each of the second cylindrical bodies 3a. It is fixed and integrated with the draw tube 3 of. Each through groove 3 of this cylindrical body 3a The movable inclined member 21 that is in contact with the fixed inclined member 20 is fitted into the inside of b. Each movement is caused by the relative movement of the shaft body 4a and the cylinder body 3a in the direction of the main shaft axis. The movable inclined member 21 slides on the inclined surface of each fixed inclined member 20 and expands in the radial direction. , or shrink. Further, the cylindrical body 3a and each movable inclined member 21 include a plurality of links. A ring groove is formed on the outer periphery, and there is no elastic material such as rubber or spring inside this ring groove. The direction in which the elastic members 23 are fitted and the respective movable inclined members 21 are constantly contracted is energized. A pressing member 22 is detachably attached to each movable inclined member 21. and presses the inner circumferential surface of the workpiece W. This pressing member 22 has the inner diameter dimension of the workpiece W. Multiple sets are available so that they can be replaced. A guide member 2 is provided on the inner circumference of the second draw tube 3 and the cylindrical body 3a. 4a, 24b are provided, and are connected to the second draw tube 3 and the cylindrical body 3a. The rod 4 and shaft body 4a act as guides when moving in the axial direction. Ma In addition, the chuck body 28 is connected to the main shaft side support portion of the workpiece W via an adapter 26. A supporting member 25 is attached. A guide member 19 is provided on the inner circumference of the adapter 26. b is provided and a guide of the sleeve 18 supporting the second draw tube 3 It cooperates with the member 19a to guide the movement of the second draw tube 3 in the axial direction. There is.

[0009] Next, the work supporting device of this invention will be explained. Open the collet 29 of the collet chuck 5 and move the rodless cylinder 9. The second draw tube 3 and rod 4 are moved back (solid line in FIG. 1). this condition In this state, set the workpiece W at a predetermined position on the tip of the collet chuck 5, and then tighten the rod lever. By the operation of the cylinder 9, the sliding shoe 9a, the guide ring 12, the shifter 13, Guide the second draw tube 3 and rod 4 via the ring 14 and bearing 15 The front is guided by the member 19a and the guide member 19b provided on the collet chuck 5. When advanced (dotted line position in Figure 1), the workpiece support means 6 etc. are inserted into the inner circumference of the workpiece W. Ru. When the workpiece support means 6 is inserted to a predetermined position, the workpiece W is supported on the spindle side. While pressing the member 25 from the center C, the second draw tube 3 and rod 4 are The cylinder 8a of the chuck cylinder 8 provided on the rear end side is operated, and the main shaft of the rod 4 is The axial backward movement causes each movable ramp member 21 to move away from its respective fixed ramp member 20. The diameter of each pressing member 22 is expanded by sliding on the inclined surface of the workpiece W to support the inner peripheral part of the workpiece W. It is supported by means 6. Next, the cylinder 7a of the hollow chuck cylinder 7 The collet 29 is closed by sliding the sleeve 30, and the second door is opened. The low tube 3 is gripped and fixed by the collet chuck 5. An end portion Wa of the workpiece W is machined using a center hole machining tool T. After center hole machining, The workpiece W is supported in the center by the center C attached to the tail stock. other Index the tool, machine the outer diameter and end face of the workpiece W, and after finishing the machining, set the collet cha The lock 5 is opened by the operation of the cylinder 7a, and the rod 4 is opened by the operation of the cylinder 8a. When the workpiece is moved forward, the workpiece supporting hand is biased by the elastic member 23 provided on the outer periphery of the cylindrical body 3a. Each of the pressing members 22 of the stage 6 contracts and releases the fixation of the inner circumference of the workpiece of the workpiece support means 6. Release the second draw tube 3 and rod 4 of the workpiece support means 6 to the cylinder 8a. The second draw tube 3 and rod 4 are moved back by the rodless cylinder 9. is moved back to the solid line position in FIG. 1 to attach and detach the work W. In the above embodiment, the third driving body was explained as the rodless cylinder 9, but this It is not limited to this, but the rotation of the cylinder and motor can also be controlled by a rack and pinion mechanism. In other words, the rod 4 and the second draw tube 3 are moved back and forth in the axial direction. It is fine as long as it is suitable.

0010

[Effect of the idea]

As mentioned above, the workpiece support device of this invention brings the workpiece into contact with the spindle side, and then A second draw tube, etc., which has a workpiece support means on the inner circumference of the workpiece, extends and By fixing the deepest part of the inner periphery of the workpiece, it is easy to attach the workpiece to the machine tool. Requires minimal space when ejecting and eliminates the need for extra movement of the tailstock. It is also possible to exchange workpieces in a short time. In addition, with a simple configuration, the spindle The end of the workpiece in the opposite direction can be securely fixed. Furthermore, machine tool printing It is also possible to prevent the moving parts from becoming larger, resulting in an economical effect.

[Brief explanation of drawings]

FIG. 1 is an overall side view of a work supporting device capable of forward and backward movement according to the present invention.

FIG. 2 is a partially enlarged sectional view of the work supporting means side of the invention.

FIG. 3 is an enlarged sectional view of the drive body side of the work supporting device of this invention.

[Explanation of symbols]

W...Work H...Spindle head 1...Main shaft 2...First draw tube 3...Second draw tube 4...Rod 5...Collet chuck 6...Work support means 7...Hollow type chuck cylinder 8...Chuck cylinder 9...Rodless cylinder 10...Substrate 10a...Plate 19a, 19b...Guide member 20...Fixed inclined member 21...Moving inclined member 22...Press member 28...Chuck body 29...Colette

Claims (1)

[Scope of utility model registration request] 1. A main shaft rotatably supported on a base of a machine tool; a first draw tube provided within the main shaft and movable in the axial direction of the main shaft with respect to the main shaft;
a second draw tube that extends in the axial direction of the main shaft, is provided to pass through the first draw tube, and is slidable in the main shaft axial direction with respect to the first draw tube; provided within this second draw tube,
a rod movable in the main shaft axis direction with respect to the second draw tube; and a rod provided on the rear end side between the main shaft and the first draw tube,
a first driving body for moving the draw tube; and the drive body, which is provided on the front end side between the main shaft and the first draw tube and moves forward and backward by relative movement between the main shaft and the first draw tube. a fixing means for fixing a second draw tube; and a second drive provided on the rear end side between the second draw tube and the rod, for moving the rod with respect to the second draw tube. a workpiece support means provided on a front end side between the second draw tube and the rod and fixing the workpiece by relative movement between the second draw tube and the rod; and the machine tool. a third drive body provided on the base body of the invention and configured to move the workpiece support means forward and backward in the direction of the spindle axis via the second draw tube and the rod, and move the workpiece support means back toward the spindle side. 1. A workpiece support device having a workpiece support means capable of advancing and retracting, characterized in that the workpiece is attached and detached at a position in which the workpiece is attached and removed, and the workpiece is fixed at a position in which the workpiece support means is advanced in a direction opposite to the main shaft.