TW201531358A - Joining structure of a process jig - Google Patents

Abstract

This invention is a joining structure of a process jig. The process jig comprises of a base, a pipe sleeve, multiple ball rollers, and a piston seat. The base equips with a cavity. The pipe inserts at the base; furthermore, portion of the pipe is located within the cavity. The pipe equips with multiple through holes for housing ball rollers. The piston seat is located inside the cavity and is inserted inside the pipe sleeve. An inner ring surface of the piston seat equips with a ring groove and an abutting surface. The piston seat can perform displacement motion at a first position and a second position along an axial direction of the pipe sleeve. Portions of the ball rollers fall into the ring groove when the piston seat is located at the first position. When the piston seat is located at the second position, the abutting surface abuts and each ball roller abuts having greater than a single-point contact. This design allows the sustained force at the abutting surface to disperse at multiple points in order to avoid damage; hence, increased processing accuracy can further be ensured.

Description

Processing fixture coupling device

The invention is related to processing and processing; in particular, it relates to a coupling device for processing a jig.

According to the processing tool, it has the functions of reusability and accurate re-preparation of the product, and can be used for producing a large number of good products with low variability and low variability. It is known that processing jigs have various structural forms due to different processing methods and uses. For example, a processing jig used for electric discharge machining is usually disposed in an electric discharge machine, and is connected to a machining power source, and then coupled to the processing jig through a coupling device, and the metal member to be processed is disposed in the coupling device. It is convenient to take off the coupling device and the metal parts to be processed and re-install.

1 shows a coupling device 1 for a conventional processing jig, comprising a base 10, a sleeve 12, a plurality of balls 14 and a piston seat 16. The base 10 is provided with a metal member to be processed. The base 10 has a chamber 102 and a through hole 104 communicating with the chamber 102 and the outside of the base 10. The sleeve 12 is coupled to the base 10 and disposed on the through hole 104. The sleeve 12 has a plurality of through holes 122 for receiving the balls 14 . The piston seat 16 is located in the chamber 102, and is movably sleeved on the sleeve 12. The piston seat 16 has an inner annular surface facing the outer annular surface of the sleeve, and the inner ring mask has a ring groove 162 and a Flat bevel 164. Thereby, when the piston seat 16 moves to the position where the ring groove 162 corresponds to the balls 14, the pull bolt 182 of the processing jig 18 can smoothly enter and exit the sleeve 12. During the process of the pull pin 182 entering the sleeve 12, the head 182a of the pull pin 18 pushes the balls 14 to make the pull The plug 18 smoothly enters the sleeve 12. Then, after the piston seat 16 is driven to move to the inclined surface 164 to abut the balls 14, the inclined surface 164 of the piston seat 16 pushes against the ball 14 to press the tapered portion 182b on the 182 to fix the pull bolt 182. The processing jig 18 is combined with the coupling device 1.

As shown in FIG. 2 , since the inclined surface 164 is in single-point contact with each of the balls 14 , the force of the inclined surface 164 abutting on each of the balls 14 will be concentrated on the contact point between the ball 14 and the inclined surface 164 . When the coupling device 1 encounters a lateral outward force, a force will act on a single point on the slope 164, so that the surface of the slope 164 is easily damaged and recessed, resulting in the coupling device 1 being coupled to the processing fixture 18. The error affects the processing accuracy of the metal parts to be processed.

In view of this, the object of the present invention is to provide a coupling device for a processing jig that ensures the machining accuracy of a workpiece to be processed.

In order to achieve the above object, the coupling device for processing a jig provided by the present invention comprises a base, a sleeve, a plurality of balls and a piston seat. The pedestal has a chamber and a through hole communicating with the chamber and the outside of the pedestal; the sleeve is coupled to the pedestal and disposed in the through hole, the sleeve has a plurality of through holes; the balls can be Movably disposed in each of the through holes of the sleeve; the piston seat is located in the chamber, the piston seat is sleeved on the outside of the sleeve, and is axially movable along a first position of the sleeve Moving in a second position, the piston seat has an inner annular surface facing the outer annular surface of the sleeve, and a ring groove is formed from the inner annular surface. When the piston seat is in the first position, one of the balls is partially dropped. In the annular groove, the inner annular surface of the piston seat further includes a top abutting surface. When the piston seat is in the second position, the abutting surface abuts with each of the balls in a manner larger than a single point contact.

The effect of the invention is to utilize the abutment surface on the piston seat The ball is formed to be larger than a single point of contact, so that the force received by the top abutting surface is dispersed at a plurality of points, and the top abutting surface is prevented from being damaged, thereby ensuring the processing precision of the workpiece to be processed.

[Use]

1‧‧‧Connecting device

10‧‧‧ Pedestal

102‧‧ ‧ room

104‧‧‧Perforation

12‧‧‧ casing

122‧‧‧through holes

14‧‧‧ balls

16‧‧‧ piston seat

162‧‧‧ Ring groove

164‧‧‧Slope

18‧‧‧Processing fixtures

182‧‧‧ Pull bolt

182a‧‧‧ head

〔this invention〕

2‧‧‧Connecting device

20‧‧‧ Pedestal

22‧‧‧ top seat

24‧‧‧Base

242‧‧ ‧ room

244‧‧‧Perforation

26‧‧‧ casing

262‧‧‧through holes

28‧‧‧ balls

28a‧‧‧ reference surface

282‧‧‧First hemisphere

284‧‧‧second hemisphere

30‧‧‧ piston seat

32‧‧‧ ring seat

322‧‧‧ Ring groove

34‧‧‧Suppression ring

342‧‧‧ Groove

344‧‧‧First stop

36‧‧‧Abutment ring

362‧‧‧ Groove

364‧‧‧Top face

364a‧‧‧ concave surface

364b‧‧‧ planar surface

38‧‧‧ Subject

382‧‧‧second stop

40‧‧‧Resistance ring

402‧‧‧Top face

402a‧‧‧Bevel

402b‧‧‧ concave surface

402c‧‧‧ tangent

404‧‧‧ Ring groove

42‧‧‧Top face

422‧‧‧ concave surface

44‧‧‧Top face

442‧‧‧ concave surface

442a‧‧‧Bevel

P1‧‧‧ first position

P2‧‧‧ second position

Θ‧‧‧ angle

3‧‧‧Processing fixtures

46‧‧‧ Pull bolt

462‧‧‧ head

464‧‧‧ cone section

Fig. 1 is a cross-sectional view showing a coupling device of a conventional processing jig.

Figure 2 is a partial enlarged view of Figure 1.

Figure 3 is a perspective view of the coupling device of the processing jig of the first preferred embodiment of the present invention.

Figure 4 is an exploded view of the coupling device of the processing jig of the first preferred embodiment.

Figure 5 is a cross-sectional view of the coupling device of the processing fixture of the first preferred embodiment, showing the piston seat in the first position.

Figure 6 is a cross-sectional view of the coupling device of the processing jig of the first preferred embodiment, showing the piston seat in the second position.

Figure 7 is a partial enlarged view of Figure 6.

Figure 8 is a schematic view showing the planar surface of the ball abutting the abutment surface.

Figure 9 is a partial enlarged view of a second preferred embodiment of the present invention.

Figure 10 is a schematic view showing the bevel of the ball of the second preferred embodiment abutting against the abutting surface.

Figure 11 is a schematic view showing an embodiment of the abutment surface.

Figure 12 is a schematic view showing another embodiment of the abutment surface.

In order to explain the present invention more clearly, the preferred embodiment will be described in detail with reference to the accompanying drawings. Referring to FIG. 3 to FIG. 7 , the coupling device of the processing jig according to the first preferred embodiment of the present invention is shown. 2, comprising a base 20, A sleeve 26, a plurality of balls 28 and a piston seat 30. The tooling fixture 3 includes a pull pin 46 having a head 462 and a tapered section 464.

The base 20 is formed by a top seat 22 and a base 24 for providing a workpiece (not shown) to be processed, and the base 24 is in contact with the surface of the processing jig 3. The base 24 has a chamber 242 and a through hole 244 communicating with the inside of the chamber 242 and the outside of the base 20.

A portion of the sleeve 26 penetrates into the through hole 244 of the base 24, one end of which is located in the chamber 242, and the other end is coupled to the outside of the base 24 and is coupled to the wall of the hole of the through hole 244 in a threaded manner. The sleeve 26 is provided with a plurality of through holes extending through the wall of the tube in the radial direction.

The balls 28 are disposed in the through holes 262 of the sleeve 26, and each of the balls 28 defines a reference surface 28a passing through a center of the circle and perpendicular to the axial direction of the sleeve 26. Each of the balls 28 is defined by the reference surface 28a. The center has a first hemisphere 282 and a second hemisphere 284.

The piston seat 30 is located in the chamber 242 and includes a ring seat 32 and a main body 38. The ring seat 32 includes a pressing ring 34 and an abutting ring 36. The pressing ring 34 and the abutting ring 36 can be The sleeve 26 is movably sleeved, and the inner ring surface of the pressing ring 34 and the abutment ring 36 faces the outer annular surface of the sleeve 26. The main body 38 is coupled to the outer annular surface of the pressing ring 34, and the outer peripheral surface of the main body 38 abuts against the wall surface of the chamber 242 of the base 20 and is movable along the wall surface of the chamber 242. The pressing ring 34 has a first blocking surface 344 . The main body 38 has a second blocking surface 382 . The first blocking surface 344 and the second blocking surface 382 jointly clamp the abutting ring 36 . Thereby, the piston seat 30 divides the chamber 242 into two spaces, and the piston seat 30 can be driven to reciprocate along the axial direction of the sleeve 26 by changing the pressure difference between the two spaces, as to how to drive the piston seat. 30 Mobile is not the focus of the present invention and will not be described here.

In addition, the inner ring surface of the pressing ring 34 and the abutting ring 36 Do not form a groove 342, 362 in the recess. The pressing ring 34 and the inner annular surface of the abutting ring 36 together form an inner annular surface of the ring seat 32. The two grooves 342, 362 together form a ring groove 322 of the ring seat 32. In addition, the inner ring surface of the abutment ring 36 further includes a top abutting surface 364 adjacent to the ring groove 322. In the embodiment, the abutting surface 364 includes a concave surface 364a and a planar surface 364b. The concave surface 364a has a concave curved surface, and the concave surface 364a has a radius of curvature substantially not less than a radius of each of the balls 28. The planar surface 364b is located between the annular groove 322 and the concave surface 364a, the planar surface 364b abuts the annular groove 322 and the concave surface 364a, and the planar surface 364b is parallel to the sleeve 26 Axial.

Through the above configuration, the piston seat 30 is driven to move between a first position P1 shown in FIG. 5 and a second position P2 shown in FIG. When the piston seat 30 is located at the first position P1, the balls 28 are in a movable state. After the pull bolt 46 penetrates the sleeve 26, the head 462 of the pull bolt 46 abuts against the balls 28 to make each One of the parts falls in the ring groove 322 (refer to Fig. 5). When the piston seat 30 moves to the second position P2, each of the balls 28 is pushed by the abutment ring 36 to protrude from the inner annular surface of the sleeve 26 and abuts the tapered section of the pull bolt 46. 464, the concave surface 364a of the abutting surface 364 abuts the second hemisphere 284 of each of the balls, and the planar surface 364b corresponds to the first hemisphere 282 of each of the balls 28 (refer to FIGS. 6 and 7).

As shown in FIG. 7, since the radius of curvature of the concave surface 364a is not less than the radius of curvature of each of the balls 28, the concave surface 364a forms a multi-point contact with each of the balls 28 to firmly hold the concave surface 364a. Pull the bolt 46. During the processing of the workpiece, when the susceptor 20 is subjected to the lateral outward force, the force acting on the abutment surface will be dispersed to the contact point with the concave surface of each of the balls 28, thereby avoiding Single point contact causes force to act directly on a single point resulting in structural damage to the abutment surface 364.

It is worth mentioning that when the base 20 is subjected to the lateral direction When the external force is greater, causing the coupling device 2 to be displaced, causing the ball 28 to be pushed by the pull bolt 46, the planar surface 364b of the abutting surface 364 will abut against the ball 28 (refer to Fig. 8), at this time, the plane The surface 364b provides a reaction force that opposes the force provided by the pull bolt 46. Thus, the offset of the coupling device 2 can be effectively limited to increase the accuracy of the workpiece machining.

FIG. 9 is a partial enlarged view of a coupling device according to a second preferred embodiment of the present invention. The coupling device of the present embodiment has a structure substantially the same as that of the first embodiment, except that the abutment ring 40 is abutted. The face 402 includes a beveled surface 402a between the annular groove 404 and the concave surface 402b, and the inclined surface 402a abuts the annular groove 404 and the concave surface 402b, and the inclined surface 402a is from the concave surface 402b to the ring The direction of the slot 404 is inclined toward the sleeve 26. The concave surface 402b defines a tangent 402c parallel to the axial direction of the sleeve 26, the slope 402a forming an angle θ with the tangent 402c. When the piston seat is located at the second position P2, the inclined surface 402a corresponds to the first hemisphere 282 of each of the balls 28, and the concave surface 402b corresponds to the second hemisphere 284 of each of the balls 28. Preferably, the angle θ is not more than 3 degrees so that the abutment ring 40 can smoothly move as it moves along the surface of each of the balls 28.

The concave surface 402b also forms a multi-point contact with each of the balls 28, and the effect is the same as that of the first embodiment. It is more worth mentioning that when the side outward force of the base 20 causes the coupling device to be displaced and the ball 28 is pushed by the pull bolt 46, the inclined surface 402a of the abutting surface 402 will abut against the ball 28. The surface (refer to Figure 10), the beveled surface 402a and the concave surface 402b more collectively limit the displacement of the ball 28, providing the effect of better stabilizing the ball 28 whereby the base 20 is subjected to greater lateral forces The offset of the coupling device can also be effectively limited.

In the following, the top surface of the piston seat and the ball are formed to be larger than the single point contact. As shown in FIG. 11, the top surface 42 includes only a concave surface 422. The concave surface 422 includes a concave surface 422. Also concave arc The surface forms a multi-point contact with the ball 28. Moreover, as shown in FIG. 12, the concave surface 442 of the abutting surface 44 is formed by two inclined surfaces 442a, and the two inclined surfaces 442a abut the balls 28 to form a multi-point contact. In practice, the concave surface is formed. The surface 442 may also include two or more slopes 442a.

In summary, the present invention is provided on the inner ring surface of the piston seat to form a top abutting surface which can form a larger than single point contact with the ball, effectively dispersing the force received by the top abutting surface, and avoiding the top abutment of the piston seat. Loss, and reduce the accuracy of the workpiece processing. It is worth mentioning that the provision of a planar surface or a bevel on the abutment surface can also limit the offset of the coupling device when the coupling device is subjected to greater lateral force.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

2‧‧‧Connecting device

20‧‧‧ Pedestal

22‧‧‧ top seat

24‧‧‧Base

242‧‧ ‧ room

26‧‧‧ casing

262‧‧‧through holes

28‧‧‧ balls

28a‧‧‧ reference surface

282‧‧‧First hemisphere

284‧‧‧second hemisphere

30‧‧‧ piston seat

36‧‧‧Abutment ring

364‧‧‧Top face

P2‧‧‧ second position

3‧‧‧Processing fixtures

46‧‧‧ Pull bolt

464‧‧‧ cone section

Claims (11)

A coupling device for processing a jig includes: a base having a chamber and a through hole communicating with the chamber and the outside of the base; a sleeve coupled to the base and disposed in the through hole, the sleeve The tube has a plurality of through holes; a plurality of balls are movably disposed in each of the through holes of the sleeve; and a piston seat is located in the chamber, the piston seat is sleeved outside the sleeve, and Moving along a direction of the sleeve at a first position and a second position, the piston seat having an inner annular surface facing the outer annular surface of the sleeve, and recessing from the inner annular surface to form a ring groove, the piston When the seat is in the first position, one of the balls falls partially in the ring groove, and the inner ring surface of the piston seat further includes a top abutting surface. When the piston seat is in the second position, the abutting surface is opposite Each ball abuts more than a single point contact. The coupling device of the processing jig of claim 1, wherein the abutting surface of the piston seat comprises a concave surface, and the concave surface of the abutting surface abuts when the piston seat is in the second position Some balls form more than a single point of contact. The coupling device of the processing jig according to claim 2, wherein the concave surface is a concave curved surface, and a radius of curvature of the concave curved surface is substantially not less than the radius of the ball. The coupling device of the processing jig of claim 2, wherein the top of the piston seat has a planar surface between the ring groove and the concave surface, the planar surface abutting the ring groove and the concave surface a surface that is parallel to the axial direction of the sleeve. The coupling device of the processing jig according to claim 4, wherein each of the balls defines a reference surface passing through a center of the circle and perpendicular to the axial direction of the sleeve, and each of the balls is divided into a first hemisphere and a center by the reference plane. The second hemisphere, when the piston seat is in the second position, the planar surface corresponds to the first hemisphere, and the concave surface corresponds to the second hemisphere. The coupling device of the processing jig according to claim 2, wherein the topping bread comprises a slope between the ring groove and the concave surface, the slope abutting the ring groove and the concave surface, and the slope is The concave surface is inclined toward the sleeve in the direction of the ring groove. The coupling device of the processing jig of claim 6, wherein the concave surface is a concave curved surface, the concave surface defining a tangent parallel to the axial direction of the sleeve, the inclined surface forming an angle with the tangent, The angle of the angle is no more than 3 degrees. The coupling device of the processing jig according to claim 6, wherein each of the balls defines a reference surface passing through a center of the circle and perpendicular to the axial direction of the sleeve, and each of the balls is divided into a first hemisphere and a center by the reference plane. The second hemisphere, when the piston seat is in the second position, the oblique surface should correspond to the first hemisphere, and the concave surface corresponds to the second hemisphere. The coupling device of the processing jig of claim 2, wherein the concave surface comprises two inclined surfaces, the two inclined surfaces abut the balls. The coupling device of the processing jig of claim 1, wherein the piston seat comprises a main body and a ring seat, the ring seat is sleeved on an outer ring surface of the sleeve, and the ring seat is provided with the top abutting surface a ring groove; the body is coupled to the outer peripheral surface of the ring seat, and an outer peripheral surface of the body abuts against a wall surface of the chamber of the base. The coupling device of the processing jig of claim 10, wherein the ring seat comprises a pressing ring and an abutting ring, the body is coupled to the outer peripheral surface of the pressing ring, and the pressing ring has a first blocking surface, The main body has a second blocking surface, and the first blocking surface and the second blocking surface jointly hold the abutting ring, and the abutting ring has the abutting surface and at least a portion of the annular groove.