Shaft workpiece blind hole sampling device and method

Abstract

The present application relates to the technical field of machining equipment, and particularly relates to a shaft workpiece blind hole sampling device and method. The shaft workpiece blind hole sampling device comprises a tumbling mechanism, which is used for supporting a shaft workpiece and driving the shaft workpiece to rotate along the axis of the shaft workpiece; a sleeving device, which is arranged at at least one end of the shaft workpiece, and the sleeving device comprises a ring-shaped cutter, the ring-shaped cutter is rotationally arranged along the axis of the ring-shaped cutter, and the ring-shaped cutter is reciprocally arranged along the axis direction of the shaft workpiece; and a material breaking drilling machine, which comprises a drill bit, the axis of the drill bit is arranged along the radial direction of the shaft workpiece, and the drill bit is reciprocally arranged along the radial direction of the shaft workpiece. The device is provided with the material breaking drilling machine to realize the cutting of the blind hole test bar at the specified position, and is provided with the tumbling mechanism to realize the rotation of the sampling position of the workpiece. The present application can realize the simultaneous sleeving and material breaking, reduce the sampling time of multiple test bars at the end face of the same workpiece, and improve the sampling efficiency.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, specifically to a device and method for sampling blind holes in shaft-type workpieces. Background Technology

[0002] Typically, blind holes on the end faces of large shaft castings and forgings are obtained through methods such as nesting, enlarging the outer ring of the sample, inserting an EDM tool to the required depth, and EDM cutting; or nesting, enlarging the outer ring of the sample, drilling one or both sides of the ring, cutting deeply with a long-handled saw blade for tough materials, or hammering the two sides of brittle materials to break them. This results in cumbersome sampling steps, large processing volume, and low efficiency. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a device and method for sampling blind holes in shaft workpieces that can achieve small machining volume and rapid material cutting sampling of blind hole samples on the end face of large shaft castings and forgings.

[0004] To achieve the above and other related objectives, the present invention provides a blind hole sampling device for shaft-type workpieces, comprising:

[0005] A tumbling mechanism is used to support shaft-like workpieces and drive the shaft-like workpieces to rotate along their own axis;

[0006] A nesting device is disposed at at least one end of the shaft-type workpiece. The nesting device includes a ring cutter, which is rotatably disposed along its own axis and reciprocates along the axial direction of the shaft-type workpiece.

[0007] A material cutting drill includes a drill bit, the axis of which is arranged radially along the shaft-like workpiece, and the drill bit is arranged to reciprocate radially along the shaft-like workpiece.

[0008] In an optional embodiment of the present invention, the line connecting the center of the ring-shaped cutting tool and the center of the shaft-like workpiece forms an angle with the projection of the axis of the drill bit onto the axial direction of the shaft-like workpiece.

[0009] In an optional embodiment of the present invention, the tumbling mechanism includes at least two sets of support rollers spaced apart along the axial direction of the shaft-like workpiece, wherein at least one set of the support rollers is connected to a drive element.

[0010] In an alternative embodiment of the invention, the support roller is configured to adjust the height of the shaft-like workpiece.

[0011] In an optional embodiment of the present invention, the support roller is provided with a locking device, the locking device having a locking position and an unlocking position. When the locking device is in the locking position, it can prevent the support roller from rotating, and when the locking device is in the unlocking position, it can allow the support roller to rotate freely.

[0012] In an optional embodiment of the present invention, the drill bit is located above the shaft-like workpiece, and the axis of the drill bit is vertically arranged.

[0013] To achieve the above and other related objectives, the present invention also provides a method for sampling blind holes in shaft-type workpieces, characterized in that it includes:

[0014] Place shaft-type workpieces on the tumbling mechanism;

[0015] The first test bar is nested into the shaft workpiece using a nesting device;

[0016] The rolling mechanism fixes the position of the first test bar at the top of the vertical line of the shaft workpiece.

[0017] The first test bar is cut by the drill bit to obtain the first sample, and the second test bar is nested on the shaft workpiece by the nesting equipment.

[0018] Repeat the process to obtain the desired sample.

[0019] In an optional embodiment of the present invention, the step of placing the shaft-like workpiece on the tumbling mechanism includes:

[0020] Adjust the height of the support rollers according to the diameter of the shaft-like workpiece so that the axis of the shaft-like workpiece is horizontal.

[0021] In an optional embodiment of the present invention, the step of nesting the shaft workpiece with a nesting device to perform the first test bar nesting includes:

[0022] Select the ring cutter according to the specifications of the first test bar;

[0023] The nesting equipment is adjusted in a direction perpendicular to the axis of the shaft workpiece to align with the position of the first test bar;

[0024] The first test bar is used to fit the shaft-type workpiece.

[0025] In an optional embodiment of the present invention, the line connecting the position of the first test bar and the center of the shaft workpiece forms a predetermined angle with the projection of the axis of the drill bit onto the axial direction of the shaft workpiece.

[0026] The technical advantage of this invention lies in that the device is equipped with a cutting drill to drill and cut blind hole test bars at designated positions, and a tumbling mechanism to rotate and adjust the sampling position of the workpiece. This invention can realize simultaneous nesting and cutting, reduce the sampling time of multiple test bars on the same workpiece end face, and improve sampling efficiency. Attached Figure Description

[0027] Figure 1 This is a top view of the blind hole sampling device for shaft workpieces in the nesting state provided in a specific embodiment of the present invention;

[0028] Figure 2 This is a front view of the blind hole sampling device for shaft workpieces in the nesting state provided in a specific embodiment of the present invention;

[0029] Figure 3 This is a front view of the material breakage state of the blind hole sampling device for shaft workpieces provided in a specific embodiment of the present invention;

[0030] Figure 4 This is a top view of the material breakage state of the blind hole sampling device for shaft workpieces provided in a specific embodiment of the present invention;

[0031] Figure 5 This is a front view of the end of a shaft-type workpiece provided in a specific embodiment of the present invention;

[0032] Figure 6 This is a front view of the position of the end sleeve and cut-off state of the shaft workpiece provided in a specific embodiment of the present invention;

[0033] Figure 7 This is a front view of the first support roller in the tumbling mechanism provided in a specific embodiment of the present invention;

[0034] Figure 8 This is a side view of the first support roller in the tumbling mechanism provided in a specific embodiment of the present invention;

[0035] Figure 9 This is a front view of the second support roller in the tumbling mechanism provided in a specific embodiment of the present invention;

[0036] Figure 10 This is a side view of the second support roller in the tumbling mechanism provided in a specific embodiment of the present invention;

[0037] Figure 11 This is a flowchart illustrating the blind hole sampling method for shaft-type workpieces provided in a specific embodiment of the present invention. Detailed Implementation

[0038] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0039] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] Typically, blind holes on the end faces of large shaft-type castings and forgings are obtained through methods such as nesting, enlarging the outer ring of the sample, inserting an EDM tool to the required depth, and EDM cutting; or nesting, enlarging the outer ring of the sample, drilling holes on one or both sides of the ring, deep cutting with a long-handled saw blade for tough materials, or hammering to break the brittle materials from both sides. These methods involve large sampling volumes and low efficiency. Therefore, this invention is proposed to solve the above problems and achieve efficient and rapid sampling of large shaft-type workpieces.

[0041] like Figure 1 The image shown is a top view of the blind hole sampling device for shaft workpieces in the nesting state according to a specific embodiment of the present invention. Figure 2 The image shown is a front view of the blind hole sampling device for shaft workpieces in the nesting state, provided in a specific embodiment of the present invention. Figure 3 This is a front view of the blind hole sampling device for shaft-type workpieces in the material breakage state provided in a specific embodiment of the present invention. Figure 4 This is a top view of the material breakage state of the blind hole sampling device for shaft workpieces provided in a specific embodiment of the present invention.

[0042] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 A blind hole sampling device for a shaft-type workpiece is shown, comprising: a tumbling mechanism for supporting the shaft-type workpiece 100 and driving the shaft-type workpiece 100 to rotate along its own axis; a nesting device 300 disposed at at least one end of the shaft-type workpiece 100, the nesting device 300 including a ring cutter, the ring cutter being rotatably disposed along its own axis and reciprocatingly disposed along the axial direction of the shaft-type workpiece 100; and a cutting drill 400 including a drill bit 410, the axis of the drill bit 410 being disposed radially along the shaft-type workpiece 100 and reciprocatingly disposed along the radial direction of the shaft-type workpiece 100.

[0043] In one embodiment, the tumbling mechanism includes at least two sets of support rollers spaced apart along the axial direction of the shaft workpiece 100, wherein at least one set of the support rollers is connected to a drive element.

[0044] In one embodiment, the support roller is configured to adjust the height of the shaft workpiece 100.

[0045] In one embodiment, the support roller is provided with a locking device, which has a locking position and an unlocking position. When the locking device is in the locking position, it can prevent the support roller from rotating, and when the locking device is in the unlocking position, it can allow the support roller to rotate freely.

[0046] Specifically, this implementation example Figure 1 and Figure 2 The blind hole sampling device for shaft-type workpieces shown includes a tumbling mechanism, a nesting device 300, and a cutting drill 400. The tumbling mechanism includes a first support roller 210 and a second support roller 220 connected to a drive element. The nesting device 300 nests the shaft-type workpiece 100 by rotating a ring cutter. Besides reciprocating along the axis of the shaft-type workpiece 100, the nesting device 300 can also move perpendicular to the axis of the shaft-type workpiece 100 according to its specifications and sampling position. Figure 1 Top view and Figure 2 In the main view, the nesting device 300 is perpendicular to the axis of the shaft workpiece 100. The cutting drill 400 cuts the shaft workpiece 100 with the drill bit 410. During operation, the cutting drill 400 rotates at a certain angle so that the drill bit 410 is aligned with the shaft workpiece 100 and the drill bit 410 can reciprocate along the radial direction of the shaft workpiece 100.

[0047] like Figure 7 The figure shown is a front view of the first support roller in the tumbling mechanism provided in a specific embodiment of the present invention. Figure 8 The figure shown is a side view of the first support roller in the tumbling mechanism provided in a specific embodiment of the present invention. Figure 9 The image shown is a front view of the second support roller in the tumbling mechanism provided in a specific embodiment of the present invention. Figure 10The image shows a side view of the second support roller in the tumbling mechanism provided in a specific embodiment of the present invention. When used to support the shaft-like workpiece 100, the height of the first support roller 210 and the axial spacing between the second support roller 220 can be adjusted according to the specifications of the shaft-like workpiece 100 to ensure that the axis of the shaft-like workpiece 100 is in a horizontal state. When used to drive the shaft-like workpiece 100 to rotate along its own axis, the first support roller 210 provides power through the driving element 211 to drive the shaft-like workpiece 100 to rotate a certain angle, and the second support roller 220 can be driven to rotate by the first support roller 210. The driving element can be a motor reducer. The first support roller 210 is also equipped with a locking device, which has a locking position and an unlocking position. When the locking device is in the locking position, it can prevent the first support roller 210 from rotating. When the locking device is in the unlocking position, it can allow the first support roller 210 to rotate freely. The locking device can fix the shaft workpiece 100 and prevent the shaft workpiece 100 from rotating when it is being fitted or broken. The locking device can be a brake device, mainly composed of a brake electromagnet and a brake shoe. After the shaft workpiece 100 rotates a certain angle, it brakes and locks, thus fixing the shaft workpiece 100. The interval between the two rollers of the first support roller 210 can also be adjusted according to the diameter of the shaft workpiece 100. The second support roller 220 is provided with a first groove 221, a second groove 222, a third groove 223, a fourth groove 224, a fifth groove 225 and a sixth groove 226, which can realize the quick removal, placement and positioning of the rollers. The placement position of the rollers can be adjusted according to the diameter of the shaft workpiece 100.

[0048] The flipping mechanism of the present invention is not limited to the first support roller 210 and the second support roller 220 provided in this embodiment. Three or more sets of support rollers can be selected according to the specifications of the shaft workpiece 100. Alternatively, the first support roller 210 and the second support roller 220 can both be connected to the driving element and equipped with a locking device.

[0049] In one embodiment, the line connecting the center of the ring cutter and the center of the shaft workpiece 100 forms an angle with the projection of the axis of the drill bit 410 onto the axial direction of the shaft workpiece 100.

[0050] In one embodiment, the drill bit 410 is located above the shaft workpiece 100, and the axis of the drill bit 410 is vertically arranged.

[0051] Specifically, such as Figure 5 The figure shown is a front view of the end of a shaft-type workpiece provided in a specific embodiment of the present invention. Figure 6The diagram shows a front view of the end-fitting and cutting states of a shaft workpiece according to a specific embodiment of the present invention. After the nesting device 300 aligns with a specific position at a predetermined angle to the radial direction of the end of the shaft workpiece 100, the shaft workpiece 100 is rotated by a flipping mechanism to position the nested position above the end of the shaft workpiece 100. The drill bit 410 of the cutting drill 400 then cuts the nested position to obtain a first test bar. This setup allows for simultaneous nesting and cutting when sampling multiple test bars of the shaft workpiece 100, reducing sampling time, improving sampling efficiency, and lowering processing costs. When the shaft workpiece 100 only needs to be sampled once, nesting can be performed directly above the end of the shaft workpiece 100, followed by cutting, or cutting can be performed first above the end of the shaft workpiece 100, followed by nesting, reducing the time required for rotating and adjusting the shaft workpiece 100 using the flipping mechanism. For safety reasons, to avoid interference between the ring cutter of the nesting equipment 300 and the drill bit 410 of the cutting drill, cutting and nesting cannot be performed simultaneously.

[0052] The nesting equipment of this device can realize three-axis drive and is suitable for nesting test bars of shaft workpieces with a large diameter range; equipped with a cutting drill to realize drilling and cutting of blind hole test bars at designated positions; equipped with a tumbling mechanism to realize the rotational adjustment of the sampling position of shaft workpieces, so that cutting and nesting can be carried out simultaneously, reducing the time for multiple samplings on the end face of the same shaft workpiece and improving sampling efficiency.

[0053] The following will combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 11 The present invention provides a detailed description of the machining method for the inner hole of the integrated bearing housing.

[0054] Step S1: Place the shaft-type workpiece on the tumbling mechanism.

[0055] In one embodiment, the height of the support roller is adjusted according to the diameter of the shaft-like workpiece so that the axis of the shaft-like workpiece is in a horizontal state.

[0056] Specifically, based on the diameter of the shaft workpiece 100, the height of the first support roller 210 and the second support roller 220, the roller spacing or the spacing between the two support rollers are adjusted so that the axis of the shaft workpiece 100 is in a horizontal state. After the adjustment is completed, the locking device is placed in the locking position to fix the shaft workpiece 100.

[0057] Step S2: The shaft workpiece is nested using a nesting device to perform the first test bar nesting.

[0058] In one embodiment, a ring cutter is selected according to the specifications of the first test bar; the nesting equipment is adjusted in a direction perpendicular to the axis of the shaft workpiece to align with the position of the first test bar; and the first test bar is nested into the shaft workpiece.

[0059] In one embodiment, the line connecting the position of the first test bar and the center of the shaft workpiece forms a predetermined angle with the projection of the axis of the drill bit onto the axial direction of the shaft workpiece.

[0060] Specifically, a suitable ring cutter is selected according to the specifications of the first test bar required for sampling; according to the specifications of the shaft workpiece 100, the nesting equipment 300 is adjusted in the direction perpendicular to the axis of the shaft workpiece 100 to align the ring cutter with the position of the first test bar; nesting is then performed. The line connecting the position of the first test bar and the center of the shaft workpiece 100 has a predetermined angle with the projection of the axis of the drill bit 410 onto the axial direction of the shaft workpiece 100.

[0061] Step S3: Fix the position of the first test bar at the top of the vertical line of the shaft workpiece using the tumbling mechanism.

[0062] Specifically, after the nesting is completed, the nesting equipment 300 keeps its original position unchanged, and the locking device of the tumbling mechanism is placed in the unlocking position. The first support roller 210 is driven by the driving element 211 to rotate the shaft workpiece 100 at a specific angle, so that the position of the first test bar is above the shaft workpiece 100, and the locking device is placed in the locking position.

[0063] Step S4: The first test bar is cut using the drill bit to obtain the first sample, and the second test bar is nested into the shaft workpiece using the nesting device.

[0064] Specifically, the cutting drill 400 rotates at a certain angle to align the drill bit 410 above the shaft workpiece 100 and cuts the first test bar; at the same time, the nesting device 300 remains in the same position and nests the second test bar on the shaft workpiece 100 through the rotation and reciprocating motion of the ring cutter.

[0065] Step S5: Cycle to obtain the desired sample.

[0066] Specifically, the cutting process of the first test bar is repeated to obtain the second test bar, and the nesting process of the third test bar is performed. The steps are repeated according to the required number of samples, such as... Figure 6 As shown, during the assembly of the (N+1)th test bar, the Nth test bar is being cut. To ensure the safety of the processing personnel, the test bars can be manually removed after all test bar assembly and cutting are completed.

[0067] The above steps are the sampling method when two or more shaft workpieces 100 need to be sampled. When only one test bar is sampled from shaft workpiece 100, the ring cutter is directly aligned with the top of shaft workpiece 100 for nesting when adjusting the nesting equipment 300. After nesting, the material is cut off, or the material is cut off above the end of shaft workpiece 100 first, and then nested. After completion, the test bar can be taken out, saving the time of rotating and adjusting shaft workpiece 100 through the flipping mechanism.

[0068] This invention is applicable to the nesting of test bars for shaft-type workpieces with a large diameter range; equipped with a cutting drill, it can drill and cut blind hole test bars at designated positions; equipped with a tumbling mechanism, it can realize the rotational adjustment of the sampling position of shaft-type workpieces, so that cutting and nesting can be carried out simultaneously; it can achieve the purpose of small machining volume and rapid sampling of blind hole samples on the end face of large shaft-type cast and forged products, and can realize the simultaneous nesting and cutting when sampling multiple test bars of the same shaft-type workpiece, thereby improving the sampling efficiency of test bars and reducing processing costs.

[0069] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0070] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0071] Throughout this specification, the terms "an embodiment," "embodiment," or "specific embodiment" refer to a particular feature, structure, or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the invention.

[0072] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0073] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0074] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0075] The above description of the embodiments shown in this invention (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the invention to the precise forms disclosed herein. Although specific embodiments and examples of the invention have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the invention, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the invention in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the invention.

[0076] This document has generally described the systems and methods in detail to aid in understanding the invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention can be practiced without one or more specific details, or using other means, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0077] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. A sampling device for blind holes in shaft-type workpieces, characterized in that, include: A tumbling mechanism is used to support shaft-like workpieces and drive the shaft-like workpieces to rotate along their own axis; A nesting device is disposed at at least one end of the shaft-type workpiece. The nesting device includes a ring cutter, which is rotatably disposed along its own axis and reciprocates along the axial direction of the shaft-type workpiece. A material cutting drill includes a drill bit, the axis of which is arranged radially along the shaft-like workpiece, and the drill bit is arranged to reciprocate radially along the shaft-like workpiece. The line connecting the center of the ring-shaped cutting tool and the center of the shaft-like workpiece forms an angle with the projection of the axis of the drill bit onto the axial direction of the shaft-like workpiece.

2. The blind hole sampling device for shaft-type workpieces according to claim 1, characterized in that, The tumbling mechanism includes at least two sets of support rollers spaced apart along the axial direction of the shaft-like workpiece, wherein at least one set of the support rollers is connected to a drive element.

3. The blind hole sampling device for shaft-type workpieces according to claim 2, characterized in that, The support roller is configured to adjust the height of the shaft-like workpiece.

4. The blind hole sampling device for shaft-type workpieces according to claim 2, characterized in that, The support roller is equipped with a locking device, which has a locking position and an unlocking position. When the locking device is in the locking position, it can prevent the support roller from rotating. When the locking device is in the unlocking position, it can allow the support roller to rotate freely.

5. The blind hole sampling device for shaft-type workpieces according to claim 1, characterized in that, The drill bit is located above the shaft-like workpiece, and the axis of the drill bit is vertically set.

6. A method for sampling blind holes in shaft workpieces using the blind hole sampling device according to any one of claims 1 to 5, characterized in that, include: Place shaft-type workpieces on the tumbling mechanism; The first test bar is nested into the shaft workpiece using a nesting device; The rolling mechanism fixes the position of the first test bar at the top of the vertical line of the shaft workpiece. The first test bar is cut by the drill bit to obtain the first sample, and the second test bar is nested on the shaft workpiece by the nesting equipment. Repeat the process to obtain the desired sample.

7. The method for sampling blind holes in shaft-type workpieces according to claim 6, characterized in that, The step of placing the shaft-type workpiece on the tumbling mechanism includes: Adjust the height of the support rollers according to the diameter of the shaft-like workpiece so that the axis of the shaft-like workpiece is horizontal.

8. The method for sampling blind holes in shaft-type workpieces according to claim 6, characterized in that, The step of nesting the shaft workpiece using a nesting device to perform the first test bar nesting includes: Select the ring cutter according to the specifications of the first test bar; The nesting equipment is adjusted in a direction perpendicular to the axis of the shaft workpiece to align with the position of the first test bar; The first test bar is used to fit the shaft-type workpiece.

9. The method for sampling blind holes in shaft-type workpieces according to claim 8, characterized in that, The line connecting the position of the first test bar and the center of the shaft workpiece forms a predetermined angle with the projection of the axis of the drill bit onto the axial direction of the shaft workpiece.

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