CN216264697U - Tool clamp for processing vertically-placed large-sized thin-wall workpiece - Google Patents

Abstract

The utility model relates to a tool clamp for processing a large-scale thin-wall workpiece which is vertically placed, which comprises: a base plate (10); a seat assembly (50); two stand assemblies (20); and a fence assembly (30) and an adjustment assembly (40) provided on each of the stand assemblies (20), wherein, when a workpiece is mounted on the tool holder, the two support rollers (54) of the carrier assembly (50) support a bottom (R3) of the workpiece in a vertical direction (T), the workpiece is fastened to the side fence (32) of each of the fence assemblies (30) and the side fence (32) of the carrier assembly (50) in a lateral direction (a), and the abutment member (42) of each of the adjustment assemblies (40) abuts a corresponding one of two outer side portions (R1 and R2) of the workpiece in a longitudinal direction (L).

Description

Tool clamp for processing vertically-placed large-sized thin-wall workpiece

Technical Field

The utility model relates to the field of processing of large thin-wall workpieces, in particular to a tool clamp for processing a vertically-placed large thin-wall workpiece, and particularly relates to a tool clamp used for drilling a circular workpiece (particularly a gear ring).

Background

In the field of wind power equipment manufacturing, machining of a gear ring is a key point and a difficulty point of the whole wind power equipment manufacturing. The gear ring belongs to a thin-wall part, a plurality of pin holes are distributed on the circumference of the gear ring, and the pin holes are formed in two surfaces of the gear ring. The position degree of the pin holes is only about 0.08mm, and the large number of pin holes on the two surfaces are difficult to machine and have high requirements.

For the processing of the gear ring, a vertical processing center is generally adopted at home at present, and during the processing of the gear ring, a pressing plate or a clamping mode that a bolt penetrates through a through hole of the gear ring is mostly adopted for the drilling processing.

By adopting the mode, although the position degree of the pin hole can meet the design requirement, the production efficiency is low, and the supply requirement of the current wind power market cannot be met at all. For example, it is statistical that each machine produces an average of about 2 ring gears per day. In addition, in order to process the double-sided pin holes, the workpiece needs to be manually turned each time, the labor intensity of workers is high, and the production cost is high.

It is desirable to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to finish machining of pin holes on two sides of a gear ring on a horizontal machining center through one-time high-precision clamping.

This purpose is realized through the frock clamp of this application. This frock clamp includes:

a base plate;

a seat assembly provided on the base plate, the seat assembly including two support rollers arranged at a distance in a longitudinal direction and including a bottom barrier;

two stand assemblies disposed oppositely in a longitudinal direction;

a baffle assembly disposed on each of the riser assemblies, each baffle assembly including a side baffle projecting from the respective riser assembly in a longitudinal direction toward the other riser assembly; and

an adjustment assembly provided on each stand assembly, each adjustment assembly including an abutment that is adjustable to be movable in a longitudinal direction relative to the stand assembly such that, when the workpiece is mounted on the tooling fixture, the two support rollers support a bottom of the workpiece in a vertical direction, the workpiece is fastened to the side fence of each fence assembly and the bottom fence of the pedestal assembly in a lateral direction perpendicular to either of the longitudinal direction and the vertical direction, and the abutment of each adjustment assembly abuts a respective one of two outer side portions of the workpiece opposite in the longitudinal direction.

In one embodiment, one or both of the two support rollers are supported rotatably about an axis extending in the lateral direction.

In one embodiment, the side dams of each dam assembly and the bottom dam of the pedestal assembly are secured to the same side surface of the workpiece.

In one embodiment, the side guards of each of the guard assemblies and the bottom guard of the seat assembly include fastener holes through which fasteners pass to fasten to the workpiece.

In one embodiment, at least one of the side baffles and the bottom baffle includes a dowel hole therethrough in a lateral direction.

In one embodiment, the adjustment assembly comprises:

an operating member attached to the riser assembly, the operating member including an operating end for operation by an operator and an opposite free end; and

an intermediate member movably attached to the free end of the operating member and to the abutment member so as to drive the abutment member to move in the longitudinal direction when the operating member is operated.

In one embodiment, the intermediate member comprises a first end and an opposite second end and an intermediate portion between the first and second ends, the first end being attached to the free end of the operating member, one of the second end and the intermediate portion being pivotally attached to the stand assembly, the other of the second end and the intermediate portion being relatively movably attached to the abutment member to drive the abutment member.

In one embodiment, the first end of the intermediate member is attached to the free end of the operating member via a spherical bearing.

In one embodiment, the stand assembly comprises a main upright of the box structure, and

the middle piece is accommodated in the box body structure, the operating piece extends out of the box body structure so as to be convenient for an operator to operate the operating end, and the abutting piece penetrates through the inner side wall of the box body structure and extends out of the box body structure to abut against the workpiece.

In one embodiment, the inner side wall of the main upright is provided with a nylon plate attached thereto so as to be sandwiched between the workpiece and the main upright.

In one embodiment, the operating member is operatively associated to a dial mounted on the main upright to display the angle of rotation of the operating member or the amount of movement of the abutment member in the longitudinal direction caused by the operation of the operating member or the pressure value of the abutment member acting on the workpiece.

In one embodiment, the dial is mounted in an opening formed on an exterior sidewall of the main upright.

In one embodiment, the outer sidewall further comprises a viewing window allowing an operator to view the interior of the adjustment assembly.

In one embodiment, the stand assembly includes: first and second side walls spaced apart in the transverse direction, inner and outer side walls spaced apart in the longitudinal direction, and top and bottom walls.

In one embodiment, the riser assembly further comprises a reinforcing rib extending outwardly in a transverse direction from one or both of the first and second side walls and connected to the bottom wall.

In one embodiment, the base plate of the tooling fixture is configured for fastening to a horizontal machining center, and/or the workpiece is a circular or ring-shaped workpiece.

The utility model provides a frock clamp through to the vertical work piece of placing support in vertical direction, fastening in the transverse direction and the mode of butt on longitudinal direction's both sides realize that the clamping of work piece on horizontal machining center is fixed to realized with horizontal machining center processing ring gear's purpose. Most importantly, the purposes of one-time clamping operation and machining pin holes on two sides are achieved. Compared with the prior art that the pin hole at the other side is processed through the turnover gear ring, the workload of operators is reduced, the processing time is shortened, the operation is simple, the precision and the position degree of the processed pin hole are higher, and the productivity is improved. According to the principle of the application, the tool clamp can be used for single-side machining and double-side machining of workpieces, and applicable machining operation is not limited to machining pin holes but comprises any operation which can be performed by a horizontal machining center. In addition, the tool clamp is not only suitable for machining round workpieces, but also suitable for large thin-wall workpieces in any shapes.

Drawings

The above and other features and advantages of the present invention will be apparent from the description and drawings, in which particular details of various embodiments according to the utility model are set forth in the accompanying drawings and the description below. Wherein:

FIG. 1 is a perspective view of a tooling fixture according to the present application;

FIG. 2 is a front view of the tooling fixture of FIG. 1 with a circular workpiece placed vertically shown in phantom;

FIG. 3 is a top view of the tooling fixture of FIG. 1; and

FIG. 4 is an enlarged view, partially in section, showing the adjustment assembly of the tooling fixture of FIG. 1, with a circular workpiece placed vertically shown in phantom.

Detailed Description

Fig. 1-4 schematically illustrate an example of machining a gear ring R, in particular a gear ring for a wind power plant, using the tooling fixture of the present application. Although the gear ring is taken as an example of the workpiece, the tool clamp is not limited to machining of the gear ring, and is applicable to any machining operation on a large thin-wall workpiece in any shape by using a horizontal machining center. As described in detail below.

In the drawings, fig. 1 is a perspective view of a tool holder according to the present application; FIGS. 2 and 3 are front and top views, respectively, of the tooling fixture of FIG. 1, wherein FIG. 2 schematically illustrates, in phantom, a vertically disposed ring gear R; FIG. 4 illustrates an enlarged partial cross-sectional view of the adjustment assembly of the tooling fixture of FIG. 1 in detail, with a portion of the circular workpiece also schematically shown.

Directional terms used in the present application are first defined in conjunction with the accompanying drawings. As shown, when the ring gear is placed vertically on the illustrated tooling fixture, the ring gear extends in a vertical plane defined by a longitudinal direction L and a vertical direction T, and the thickness of the ring gear is a dimension defined in a transverse direction a that is perpendicular to both the longitudinal direction L and the vertical direction T. Thus far, the directional terms longitudinal direction L, vertical direction T, and transverse direction a used herein are perpendicular, two by two, to be understood with reference to the directions identified in fig. 1.

As shown in fig. 1, the tooling fixture of the present application generally includes a base plate 10, two oppositely disposed riser assemblies 20 disposed on the base plate 10, a baffle assembly 30 disposed on each riser assembly, an adjustment assembly 40 disposed on each riser assembly 20, and a support assembly 50 disposed on the base plate 10.

As shown in fig. 2, in use, the ring gear R is placed on the tooling jig, has outer side portions R1 and R2 on opposite sides in the longitudinal direction L and a bottom portion R3 located lowermost, and defines a central axis X extending in the transverse direction a and opposite side surfaces R11 and R12 (fig. 3) in the transverse direction a, and also defines an outer peripheral surface R13. In the vertical direction T, the ring gear R is supported by the carrier assembly 50 at the bottom R3; in the longitudinal direction L, the two stand assemblies 20 abut against the two outer sides R1 and R2, respectively, by means of an adjustment assembly 40 provided on each stand assembly 20 with an adjustable contact force exerted by the adjustment assembly 40 on the two outer sides R1 and R2 of the ring gear R in the longitudinal direction L towards the central axis X of the ring gear R; in the lateral direction a, the side surface R11 of the ring gear R is fastened at the outer sides R1 and R2 to the baffle assembly 30 provided on each stand assembly 20 and at the bottom R3 to the seat assembly 50. The fastening of the ring gear R to the tool holder at the above three positions is achieved by fasteners.

In the illustrated embodiment, the base plate 10 is illustrated as a generally rectangular plate, and on each side in the transverse direction a, the base plate 10 is provided with a plurality of fastening holes 17 arranged in the longitudinal direction L to allow fasteners (not shown) to pass therethrough to fasten the present tooling fixture to a horizontal machining center. Of course, in other embodiments, any other shaped floor may be used.

Two stand assemblies 20 are disposed in a symmetrical manner in the longitudinal direction L, and each stand assembly 20 is provided with one adjusting assembly 40 and one baffle assembly 30, and the following description will be given by taking one stand assembly 20 and the adjusting assembly 40 and the baffle assembly 30 above it as an example, and it should be understood that the following description of one stand assembly 20, the adjusting assembly 40 and the baffle assembly 30 is equally applicable to the other stand assembly 20, the adjusting assembly 40 and the baffle assembly 30.

The stand assembly 20 includes a box-like shaped main stand 210, for example, the main stand 210 includes two side-by-side disposed first and second side walls 212, 214 (fig. 2) spaced apart in the transverse direction a, an inner side wall 216 (e.g., illustrated as curved or, alternatively, straight) facing the ring gear R and an outer side wall 218 opposite the inner side wall 216 in the longitudinal direction L, and top and bottom walls 222, 224 opposite in the vertical direction T. It will be appreciated that any of these walls may be a unitary panel, such as first sidewall 212, top wall 222 and bottom wall 224, or may be formed from multiple panels, such as inner sidewall 216 and outer sidewall 218, for support purposes. To enhance support, the main upright 210 formed by the plurality of walls may include a plurality of reinforcing ribs 226, for example, extending outwardly from the side walls 212 and 214 in the transverse direction A and connected to the bottom wall 224. depending on the application, the ribs 226 may have any suitable shape (e.g., triangular in shape), number (two ribs on each side in the illustrated embodiment), size and arrangement, and the ribs 226 may be one piece or may include multiple pieces joined together.

The adjustment assembly 40 may be disposed on or in the stand assembly 20 in any manner and may be disposed at any location on the stand assembly 20 provided that it is capable of providing the desired functionality. In the illustrated example, the adjustment assembly 40 is at least partially disposed within the main stand 210 with its abutment member 42 projecting through the inner side wall 216 toward the ring gear R to abut an outer peripheral surface R13 of the ring gear R, with the operating member 44 projecting from the main stand 210 (e.g., away from the ring gear R in the longitudinal direction L from the outer side wall 218) to facilitate operation by an operator, and with the intermediate member 46 associating the abutment member 42 with the operating member 44 being received within the main stand 210.

As shown in fig. 4, the operating member 44 includes an operating end 44a located outside the main stand 210 of the generally box-shaped structure for operation by an operator and an opposite free end 44b located inside the main stand 210 of the generally box-shaped structure, with the body portion between the operating end 44a and the free end 44b extending through the outer side wall 218, specifically associated with a dial 62 (fig. 1) mounted in an opening formed in the outer side wall 218, such that the dial 62 is able to indicate the angle through which the operating member 44 rotates when the operating member 44 is operated by the operator for rotation. The provision of the dial 62 enables the operator to intuitively and quantitatively know the angle through which the operating member 44 is turned, so that the magnitude of the displacement in the longitudinal direction L of the abutment 42 acting directly with the ring gear R or the magnitude of the contact force or pressure of the abutment 42 on the ring gear R can be derived (or, in some embodiments, the dial 62 can be directly displayed).

The intermediate member 46 has a first end 46a relatively movably connected with the operating end 44a of the operating member 44, an opposite second end 46b relatively pivotably attached (e.g., pivotable about a pivot 41) to the main stand 210 (e.g., the inner side wall 216 of the main stand 210), and an intermediate portion 46c connecting the first end 46a and the second end 46b, wherein the abutment member 42 is attached to the intermediate portion 46c while being pivotally and relatively slidably attached therebetween. In some embodiments, the abutment 42 may be a one-piece structure, and in some embodiments, the abutment may be in the form of an assembly of two or more parts. The abutment member 42 is pivotally connected to the intermediate portion 46c about the pivot shaft 43 by the pivot shaft 43, and the illustrated intermediate portion 46c is formed with an elongated slot that allows the abutment member 42 to move or slide along the intermediate portion 46 c.

In this way, when the operator operates the operating end 44a of the operating member 44, the operating member 44 moves in the longitudinal direction L relative to the main stand 210, the first end 46a of the intermediate member 46 translates with following the latter while pivoting relative to the operating member 44, whereby the intermediate member 46 pivots about the pivot 41. The intermediate portion 46c of the intermediate piece 46 drives the abutment member 42, both pivoting and sliding with respect to each other, causing the abutment member 42 to move only in the longitudinal direction L with respect to the main stand 210, with the aim of approaching or abutting, or moving away or releasing the ring gear R.

It should be understood by those skilled in the art that the illustrations only show one exemplary structure that can achieve the intended function and that any structure that can achieve the same function is within the scope of the present application. For example, the operating member 44 may be pivotally attached to the main stand 210 at its middle portion 46c while attaching and actuating the abutment member 42 at its second end 46 b. As another example, the operating member 44 may be threaded with a threaded hole formed in the outer sidewall 218 on the one hand, and separately associated with the dial 62 mounted to the main stand 210 in any manner on the other hand.

The baffle assembly 30 is also disposed on the riser assembly 20 and includes a side baffle 32 fixedly attached to the riser assembly 20, for example the side baffle 32 may be attached to a first side wall 212 of a main riser 210 of the riser assembly 20. The side dam 32 includes an overlapping attachment portion 30a attached to the riser assembly 20 and an overhanging portion 32b extending beyond the riser assembly 20 in the longitudinal direction L toward the ring gear R, and fastener holes 33 extend through the overhanging portion 30b of the side dam 32 such that fasteners 35 extend through the fastener holes of the side dam 32 into corresponding fastener holes formed in the ring gear R, securing the ring gear R to the present tooling fixture in the transverse direction a. For example, in the illustrated example, each baffle 32 is provided with two fastener holes and correspondingly two fasteners 35 are used to fasten the ring gear R. Optionally, the side dams 32 are also shown to include reinforcing ribs 33.

As previously described, the tool holder mount assembly 50 also includes a bottom dam 52, the bottom dam 52 being generally aligned with the side dam 32 of the stand assembly 20 in the vertical direction T, preferably with the inner surface 52a of the bottom dam 52 facing the ring gear R being coplanar with the inner surface 32a of the side dam 32 facing the ring gear R (fig. 3), and the fasteners 55 extending through fastener holes through the bottom dam 52 into corresponding fastener holes in the bottom R3 in which the ring gear R is formed. In this way, at the opposite two outer side portions R1 and R2 and the bottom portion R3 of the ring gear R in the horizontal direction of the longitudinal direction L, that is, at three positions in the circumferential direction of the ring gear R, fasteners are provided to exert a fastening force on the ring gear R in the lateral direction a toward the side fence 32 and the bottom fence 52 to fasten the ring gear R to the tool holder of the present application. For example, the fasteners include a total of four fasteners 35 at the two outer sides R1 and R2 and fastener 55 at the bottom R3. The fasteners 55 may be two fasteners 55 arranged symmetrically about a vertical plane V (fig. 2) defined by the central axis X and the vertical direction T of the ring gear R, or one of the fasteners may be replaced with a dowel pin or a fastener 57 having a positioning function as shown in the drawing to provide the positioning function of the ring gear R in the circumferential direction. Optionally, the bottom flap 52 is provided with a reinforcement rib 53 on the side facing away from the workpiece R.

As mentioned above, in addition to also providing fixation in the transverse direction a, the carrier assembly 50 also provides an upward supporting effect in the vertical direction T for the ring gear R. This supporting action is achieved by means of two supporting rollers. The two support rollers 54 are arranged substantially symmetrically about the above-mentioned vertical plane V so as to provide symmetrical support for the ring gear R. In other words, the two support rollers 54 are substantially equidistant from the vertical plane V. In order to rotatably support each of the support rollers 54 on the base plate 10 about a rolling axis parallel to the central axis X of the ring gear R, each of the support rollers 54 is fitted over a support shaft 542 fixedly supported on the base plate 10, and both ends of each of the support shafts 542 are fixedly supported by two end seats 544 directly or indirectly fixed to the base plate 10 (e.g., via the illustrated base plate 51). In this manner, each support roller 54 is selectively rotatably supported about the rolling axis, and the mobility (e.g., rotatability or rollability of the illustrated embodiment) of the support rollers 54 for supporting the ring gear R allows the heavier ring gear R to be adjusted relatively easily, such as by requiring rotation of the ring gear R to align the corresponding fastener hole when installing the fastener 35 or 55 or 57.

The tool clamp of the application is described in detail by taking a machined workpiece as a gear ring as an example, the gear ring is machined by the tool clamp, the gear ring is vertically placed on the horizontal machining center, and the gear ring is fixed to the tool clamp in a bottom supporting mode, a two-side jacking mode or an abutting mode and then fixed to the horizontal machining center. The clamping mode can ensure that the gear ring is machined within an allowable roundness range. The gear ring is fixed to the tool fixture and the pin holes are positioned, so that the machining precision of machining the front side and the back side by using the rotating function of the B shaft of the numerical control machine tool is ensured, the machining of the front side and the back side comprises machining of a plurality of pin holes arranged in the circumferential direction in a drawing and machining of any other related holes simultaneously, the workpiece overturning by manpower is avoided in the machining process, the requirement on the position degree of the holes is met, and the production efficiency is greatly improved.

The technical personnel in the field can easily understand that the tool clamp provides a favorable choice for processing the large thin-wall workpiece by using the horizontal processing center, and particularly when the front and back sides of the large thin-wall workpiece need to be processed, and the processing precision requirement is higher, the tool clamp has the advantages of realizing two-side processing by one-time clamping, not only saves the time and cost brought by turning the workpiece, but also greatly improves the processing precision.

It should be understood by those skilled in the art that although the tooling fixture of the present application is described as being used for machining both side pin holes of a ring gear workpiece of a wind power plant, the tooling fixture of the present application may be applied to any situation where a large-sized, thin-walled (small-thickness) workpiece needs to be machined on one side or both sides. The workpiece to be machined is not limited to a circular workpiece, but is more limited to a ring gear. The machining operation is not limited to machining of holes, and may be any other machining operation that can be performed by a horizontal machining center. The method can utilize the excellent processing performance of the horizontal processing center to the maximum extent, improve the processing efficiency of large-scale thin-wall parts, and reduce the labor intensity of workers, thereby reducing the production cost.

Specific embodiments according to the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above specific structures, and encompasses various modifications and equivalent features. Various changes may be made by those skilled in the art without departing from the scope of the utility model.

Claims (16)

1. The utility model provides a frock clamp for processing large-scale thin wall work piece of vertical placing which characterized in that includes:

a base plate (10);

a seat assembly (50) provided on the base plate (10), the seat assembly comprising two support rollers (54) arranged spaced apart in the longitudinal direction (L) and comprising a bottom flap (52);

two stand assemblies (20) arranged opposite in the longitudinal direction (L);

a baffle assembly (30) disposed on each stand assembly (20), each baffle assembly (30) including a side baffle (32) projecting from the respective stand assembly (20) in the longitudinal direction (L) toward the other stand assembly (20); and

an adjustment assembly (40) disposed on each stand assembly (20), each adjustment assembly (40) including an abutment (42), the abutment (42) is adjustable to be movable in a longitudinal direction (L) relative to the stand assembly (20) such that, when the workpiece is mounted on the tooling fixture, in the vertical direction (T), the two support rollers (54) support the bottom (R3) of the workpiece, in a transverse direction (A) perpendicular to either of the longitudinal direction (L) and the vertical direction (T), the workpiece being secured to the side dam (32) of each dam assembly (30) and the bottom dam (52) of the seat assembly (50), and in the longitudinal direction (L), the abutment (42) of each adjustment assembly (40) abuts a respective one of two outer sides (R1 and R2) of the workpiece opposite in the longitudinal direction (L).

2. A tooling fixture for machining large, thin-walled workpieces placed vertically according to claim 1, characterized in that one or both of the two support rollers (54) are supported in a rotatable manner about an axis extending in the transverse direction (a).

3. A tool fixture for machining large, thin-walled, vertically-placed workpieces according to claim 1 in which the side dams (32) of each dam assembly (30) and the bottom dam (52) of the pedestal assembly (50) are secured to the same side surface of the workpiece.

4. A tool fixture for machining large, thin-walled, vertically-disposed workpieces according to claim 3 wherein the side dams (32) of each dam assembly (30) and the bottom dam (52) of the pedestal assembly (50) include fastener holes for fasteners to pass through to fasten to the workpiece.

5. A tool clamp for machining large, thin-walled, vertically-placed workpieces according to claim 4 in which at least one of the side dams (32) and the bottom dam (52) includes a dowel hole therethrough in the transverse direction (A).

6. A tool clamp for machining large, thin-walled, vertically placed workpieces according to any of claims 1 to 5, characterized in that the adjustment assembly (40) comprises:

an operating member (44) attached to the stand assembly (20), the operating member (44) including an operating end (44a) for operation by an operator and an opposite free end (44 b); and

an intermediate piece (46), the intermediate piece (46) being movably attached to the free end (44b) of the operating piece (44) and to the abutment piece (42) so as to drive the abutment piece (42) to move in the longitudinal direction (L) when the operating piece (44) is operated.

7. A tool clamp for machining large, thin-walled, vertically-placed workpieces according to claim 6, wherein the intermediate member (46) includes a first end (46a) and an opposite second end (46b), and an intermediate portion (46c) between the first end (46a) and the second end (46b), the first end (46a) being attached to a free end (44b) of the operating member (44), one of the second end (46b) and the intermediate portion (46c) being pivotally attached to the stand assembly (20), the other of the second end (46b) and the intermediate portion (46c) being relatively movably attached to the abutment member (42) to actuate the abutment member (42).

8. A tool holder for machining large, thin-walled, vertically placed workpieces according to claim 7 in which the first end (46a) of the intermediate piece (46) is attached to the free end (44b) of the operating piece (44) via a spherical bearing.

9. The tool clamp for machining the large-sized thin-walled workpiece placed vertically as claimed in claim 6, wherein,

the stand assembly (20) comprises a main upright (210) of a box structure, and

the intermediate member (46) is received within the box structure, the operating member (44) extends outside the box structure to facilitate operation of the operating end (44a) by an operator, and the abutment member (42) extends out of the box structure through an inner side wall (216) of the box structure to abut the workpiece.

10. A tool fixture for machining large, thin-walled, vertically-placed workpieces according to claim 9, characterized in that the inner side wall (216) of the main column (210) is provided with a nylon plate (45) attached thereto for sandwiching between the workpiece and the main column (210).

11. A tooling fixture for machining large, thin-walled workpieces placed vertically according to any of claims 9-10, characterized in that the operating member (44) is operatively associated to a dial (62) mounted on a main upright (210) to display the angle of rotation of the operating member (44) or the amount of movement of the abutment member (42) in the longitudinal direction (L) caused by the operation of the operating member (44) or the pressure value of the abutment member (42) acting on the workpiece.

12. A tool holder for machining large, thin-walled, vertically-placed workpieces according to claim 11, characterized in that the dial (62) is mounted in an opening formed in an outer sidewall (218) of the main column (210).

13. A tool fixture for machining large, thin-walled, vertically-placed workpieces according to claim 12, characterized in that the outer side wall (218) further includes a viewing window (64) allowing an operator to view the interior of the adjustment assembly (40).

14. A tool fixture for machining large, thin-walled, vertically placed workpieces according to any of claims 1-5 and 7-10, characterized in that the stand assembly (20) comprises: a first sidewall (212) and a second sidewall (214) spaced apart in a transverse direction (a), an inner sidewall (216) and an outer sidewall (218) spaced apart in a longitudinal direction (L), and a top wall (222) and a bottom wall (224).

15. A tool fixture for machining large, thin-walled, vertically-positioned workpieces as recited in claim 14, wherein said stand assembly (20) further includes a reinforcement rib (226) extending outwardly in a transverse direction (a) from one or both of said first and second side walls (212, 214) and connected to said bottom wall (224).

16. Tool clamp for machining large, thin-walled, vertically placed workpieces according to any of claims 1-5 and 7-10, characterized in that the base plate (10) of the tool clamp is configured for fastening to a horizontal machining center and/or the workpiece is a circular or ring-shaped workpiece.

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