CN110744140A - In-hole oxide scale removing device - Google Patents

Abstract

The invention discloses a device for removing oxidized skin in a hole, which comprises: the support base plate, be used for getting rid of the downthehole cinder of product and the reamer of downthehole oil dirt, be connected with the reamer be used for driving reamer pivoted drive arrangement, be used for setting up the fixing device of reamer, be used for fixed and the tight stop device of clamp product, fixing device and stop device all set up on the support base plate, and fixing device and stop device's position cooperatees to make the reamer aim at the downthehole of inserting the product. By using the in-hole oxide scale removing device provided by the invention, the labor cost can be saved, the processing efficiency can be improved, and the product quality can be ensured.

Description

In-hole oxide scale removing device

Technical Field

The invention relates to the technical field of machinery industry, in particular to a device for removing oxidized skin in a hole.

Background

In the mechanical industry, it is often necessary to drill a shaft before heat treating the shaft, because the hardness of the surface of the heat treated product is high and the drilling operation is not easy to be performed. Shaft parts are usually provided with positioning holes or assembly matching holes, and the precision requirement of the holes is high. However, when the product after drilling is subjected to a heat treatment process, it is inevitable to leave scale and oil stains on the surface of the product. Therefore, in order to ensure the performance of the product, a procedure for removing the scale and oil dirt in the pores is often required.

In the prior art, methods for removing scale and oil stain in holes commonly used in the mechanical industry include: the special person removes the oxide skin by hand or adopts separate equipment to carry out separate processing to remove the oxide skin and the like. If the special person removes the oxide skin manually, a large amount of labor cost and time are consumed, the product quality cannot be guaranteed, and the precision of the hole is easy to damage. If the single equipment is used for carrying out single processing to remove the in-hole oxide scale and the oil dirt of the product, the whole process needs personnel to operate, and longer manual operation time is consumed. Therefore, the prior art method for removing scale and oil stain in the pores needs a large amount of labor cost.

In summary, how to provide a device capable of saving labor cost and ensuring product quality is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides an in-hole oxide scale removing device, which can save labor cost, improve processing efficiency and ensure product quality.

In order to achieve the above purpose, the invention provides the following technical scheme:

an in-hole scale removal device comprising: the supporting base plate, be used for getting rid of the downthehole cinder of product and the reamer of downthehole oil dirt, with what the reamer is connected is used for the drive the reamer pivoted drive arrangement, be used for setting up the fixing device of reamer, be used for fixing and pressing from both sides tight the stop device of product, fixing device with stop device all sets up on the supporting base plate, fixing device with stop device's position cooperatees, so that the reamer is aimed at and is inserted the downthehole of product.

Preferably, the driving device is a motor, the motor is connected with a motor connecting rod, the reamer is connected with a reamer connecting rod, and the reamer connecting rod is connected with the motor connecting rod, so that the motor drives the reamer to rotate.

Preferably, the fixing means comprises: the reamer fixing device comprises a bearing plate, a bearing, a connecting sleeve and a motor connecting rod, wherein the bearing plate is arranged on the supporting base plate and used for supporting the reamer, the bearing is arranged in the bearing plate and used for fixing the reamer connecting rod, and the connecting sleeve is connected with the bearing plate and used for fixing the reamer connecting rod and the motor connecting rod.

Preferably, the bearing comprises a plane bearing and a deep groove ball bearing which are nested on the reamer connecting rod, the plane bearing is used for supporting the reamer connecting rod, and the deep groove ball bearing is used for avoiding the movement of the reamer connecting rod.

Preferably, the limiting device comprises a fixing plate arranged on the supporting base plate and used for supporting the product, a guide post arranged on the fixing plate and used for fixing the product, and a guide plate arranged on the fixing plate and used for limiting the rotation of the product, wherein an opening for allowing the reamer to pass through is arranged between the guide plate and the fixing plate in a penetrating manner, so that the reamer can be inserted into the hole of the product in an aligned manner.

Preferably, the guide post and the guide plate are detachably connected with the fixed plate.

Preferably, the size of the guide post is matched with the size of a central hole of the product, and the guide post is in clearance fit with the product so as to be convenient for taking the product.

Preferably, the shape of the guide plate matches the shape of the profiled portion of the product to limit rotation of the product.

Preferably, the fixing device is detachably connected with the supporting bottom plate, and the limiting device is detachably connected with the supporting bottom plate.

When the in-hole oxide scale removing device provided by the invention is used, firstly, a product needing to remove the in-hole oxide scale and the in-hole oil dirt is placed on the limiting device, and the product is under the fixing and clamping action of the limiting device, so that the in-hole oxide scale and the in-hole oil dirt can be removed by the reamer more conveniently. And, because the positions of the fixing device and the limiting device are matched, the reamer can be aligned in the hole of the inserted product. Then, start drive arrangement, drive arrangement can drive the reamer and rotate to make the downthehole cinder and the downthehole oil dirt of reamer can accurate removal product.

In addition, when the in-hole oxide scale removing device provided by the invention is used, an operator only needs to place a product on the limiting device and then starts the driving device, and the operation of removing the in-hole oxide scale and the in-hole oil dirt of the product can be completed. The process does not require the operator to perform other operations, thus saving time and reducing labor cost. And, through setting for the position of reamer and product in advance for the downthehole cinder and the greasy dirt of getting rid of that the reamer can be accurate, this process can avoid causing destruction to the shape of hole, more is favorable to guaranteeing product precision and improvement machining efficiency.

In conclusion, the in-hole oxide scale removing device provided by the invention can save labor cost, improve processing efficiency and ensure product quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of an in-hole scale removing apparatus according to the present invention;

fig. 2 is a sectional view of a reamer and a motor coupling part in the in-hole scale removing apparatus.

In FIGS. 1-2:

the device comprises a motor 1, a connecting sleeve 2, a bearing plate 3, a supporting bottom plate 4, a fixing plate 5, a guide post 6, a product 7, a guide plate 8, a reamer connecting rod 9, a motor connecting rod 10, a plane bearing 11, a deep groove ball bearing 12 and a reamer 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a device for removing oxidized skin in a hole, which can save labor cost, improve processing efficiency and ensure product quality.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an in-hole scale removing apparatus according to the present invention; fig. 2 is a sectional view of a reamer and a motor coupling part in the in-hole scale removing apparatus.

This embodiment provides a downthehole oxidation skin remove device, includes: the support base plate 4, be used for getting rid of the downthehole cinder of product 7 and the reamer 13 of downthehole oil dirt, be connected with the reamer 13 be used for driving reamer 13 pivoted drive arrangement, be used for setting up the fixing device of reamer 13, be used for fixed and the tight stop device of clamp product 7, fixing device and stop device all set up on support base plate 4, and fixing device and stop device's position cooperatees to make reamer 13 aim at the downthehole of inserting product 7.

It should be noted that the product 7 herein mainly refers to shaft parts, such as camshaft, crankshaft, parallel shaft and the like, in which positioning holes, fitting holes and the like are usually provided, and the precision requirement of these types of holes is high, so when the device provided by the present invention is used to remove the scale and oil stain in the holes of the product 7, the damage to the holes can be avoided, thereby ensuring the processing quality of the product 7.

Since these types of shaft parts generally have a profiled portion, for example, the camshaft has a projecting portion. Therefore, when the product 7 is fixed and clamped by the limiting device, the limiting device can be provided with a groove matched with the special-shaped part, so that the groove and the special-shaped part are clamped and fixed, the product 7 can be limited to rotate, and the purpose of clamping the product 7 is finally achieved.

It should be noted that, here, the fixing device and the limiting device are both disposed on the supporting base plate 4, and the matching of the positions of the fixing device and the limiting device means that the height, the relative distance, and the like of the fixing device and the limiting device are matched to align the reamer 13 into the hole of the product 7. Therefore, the height and the relative distance of the fixing device and the limiting device can be adjusted in advance, so that the height and the distance of the reamer 13 and the product 7 are matched, after the product 7 is placed on the limiting device, the reamer 13 can be aligned to the inside of a hole, required to be machined, of the inserted product 7, and the operation of removing oxide scales and oil scales in the hole is facilitated. Therefore, the in-hole oxide scale removing device can be suitable for different shaft parts and can also be suitable for removing in-hole oxide scales and in-hole oil scales of products 7 in other fields.

It should be further noted that the limiting device is used for fixing and clamping the product 7, so as to avoid that the product 7 rotates when the product 7 is processed, and the effect of removing scale and oil dirt in the hole by the reamer 13 is affected. Moreover, the fixing device is used for fixing the reamer 13, which means that the fixing device can only enable the reamer 13 to rotate in the circumferential direction, and the reamer 13 does not move up and down or shake left and right, so that the reamer 13 can accurately remove the scale and oil dirt in the hole of the product 7.

It should be noted that the directions and positional relationships indicated by "up and down", "left and right" in the present application are based on the directions and positional relationships shown in the drawings, and are only for the convenience of simplifying the description and facilitating the understanding, but do not indicate or imply that the device or element referred to must have a specific direction, be configured and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Therefore, in the actual application process, according to the actual situation and the actual requirement, the structures, the positions and the like of the supporting base plate 4, the fixing device and the limiting device can be determined, so as to ensure that the reamer 13 can be aligned to the hole of the inserted product 7.

When the in-hole oxide scale removing device provided by the invention is used, firstly, the product 7 needing to remove the in-hole oxide scale is inserted into the limiting device, and the product 7 cannot rotate under the fixing and clamping action of the limiting device, so that the reamer 13 is more beneficial to removing the in-hole oxide scale and the in-hole oil dirt. And, since the height and distance of the fixing means and the spacing means are matched, the reamer 13 can be aligned with the inside of the hole to be processed into which the product 7 is inserted. Then, a driving device is started, and the driving device can drive the reamer 13 to rotate, so that the reamer 13 can accurately remove the in-hole oxide scale and in-hole oil dirt of the product 7.

In addition, when the in-hole oxide scale removing device provided by the invention is used, an operator only needs to insert the product 7 into the limiting device and then starts the driving device, so that the operation of removing the in-hole oxide scale and the in-hole oil dirt of the product 7 can be completed. The process does not require the operator to perform other operations, thus saving time and reducing labor cost. Moreover, by setting the positions of the reamer 13 and the product 7 in advance, the reamer 13 can accurately remove oxide scales and oil scales in the hole, and the reamer 13 only performs circumferential rotation motion, so that the process can avoid damaging the shape of the hole. Also, the reamer 13 can correct some holes that are deformed during the heat treatment. Therefore, the device is beneficial to improving the precision of the product 7 and improving the processing efficiency.

In conclusion, the in-hole oxide scale removing device provided by the invention can save labor cost, improve processing efficiency and ensure the quality of a product 7.

On the basis of the above in-hole oxide scale removing device, preferably, the driving device is a motor 1, the motor 1 is connected with a motor connecting rod 10, the reamer 13 is connected with the reamer connecting rod 9, and the reamer connecting rod 9 is connected with the motor connecting rod 10, so that the motor 1 drives the reamer 13 to rotate.

It should be noted that, the driving device is motor 1, motor 1 is connected with motor connecting rod 10, reamer 13 is connected with reamer connecting rod 9, reamer connecting rod 9 is connected with motor connecting rod 10, can drive motor connecting rod 10 to rotate after in order to make motor 1 start, and reamer connecting rod 9 connected with motor connecting rod 10 also can synchronous rotation thereupon, reamer connecting rod 9 will drive reamer 13 and rotate then, finally make reamer 13 can remove the downthehole cinder and the downthehole oil dirt of product 7 through self circumferential direction rotation. Namely: the motor connecting rod 10 can be used as an output end of the motor 1, so that the power generated by the motor 1 is transmitted to the reamer connecting rod 9 and the reamer 13 through the motor connecting rod 10. And, connect through motor connecting rod 10 and reamer connecting rod 9 between motor 1 and the reamer 13, will be more favorable to guaranteeing to rotate the effect and improve device life.

Therefore, the model, size, position and the like of the motor 1, the motor connecting rod 10, the reamer 13 and the reamer connecting rod 9 can be determined according to actual conditions and actual requirements in the actual application process, so that the reamer 13 can rotate along with the motor 1 after the motor 1 is started.

In addition to the above in-hole scale removing apparatus, preferably, the fixing means includes: the reamer fixing device comprises a bearing plate 3, a bearing, a connecting sleeve 2 and a connecting sleeve, wherein the bearing plate 3 is arranged on a supporting base plate 4 and used for supporting a reamer 13, the bearing is arranged in the bearing plate 3 and used for fixing a reamer connecting rod 9, and the connecting sleeve 2 is connected with the bearing plate 3 and used for fixing the reamer connecting rod 9 and a motor connecting rod 10.

It should be noted that the fixing device includes a bearing plate 3 disposed on the supporting base plate 4, a bearing, and a connecting sleeve 2. Wherein the bearing plate 3 is used to support the reamer 13 to fix the height and position of the reamer 13. The bearing is used for fixing the reamer connecting rod 9, so that the bearing can be nested outside the reamer connecting rod 9, and the bearing can enable the rotation of the reamer connecting rod 9 to be more flexible. The connecting sleeve 2 is used for fixing the reamer connecting rod 9 and the motor connecting rod 10, so that the connection between the motor connecting rod 10 and the reamer connecting rod 9 is more stable, and the motor connecting rod 10 can better drive the reamer connecting rod 9 to synchronously rotate. Moreover, the connecting sleeve 2 can avoid the phenomena of vertical movement or left-right shaking of the motor connecting rod 10 and the reamer connecting rod 9, and then the reamer 13 can accurately remove oxide scales and oil scales in the hole.

In this embodiment, the bearing may be embedded outside the reamer connecting rod 9 and disposed inside the bearing plate 3, and the bearing plate 3 is disposed on the upper portion of the supporting base plate 4. After the motor connecting rod 10 and the reamer connecting rod 9 are connected together, the connecting sleeve 2 is nested outside the motor connecting rod and the reamer connecting rod, and the connecting sleeve 2 is fixedly connected with the bearing plate 3. Therefore, in the actual application process, according to the actual situation and the actual requirement, the shapes, the sizes and the like of the bearing plate 3, the bearing and the connecting sleeve 2 can be determined, so as to ensure that the motor 1 can drive the reamer 13 to perform stable circumferential rotation.

On the basis of the in-hole oxide scale removing device, preferably, the bearing comprises a plane bearing 11 and a deep groove ball bearing 12 which are nested on the reamer connecting rod 9, the plane bearing 11 is used for supporting the reamer connecting rod 9, and the deep groove ball bearing 12 is used for preventing the reamer connecting rod 9 from moving.

It should be noted that the bearing herein includes a planar bearing 11 and a deep groove ball bearing 12, so the planar bearing 11 and the deep groove ball bearing 12 can be nested outside the reamer connecting rod 9, the planar bearing 11 and the deep groove ball bearing 12 are tightly connected, and both are disposed inside the bearing plate 3, so that the planar bearing 11 can fix and support the reamer connecting rod 9, and the deep groove ball bearing 12 can circumferentially fix the reamer connecting rod 9, so as to avoid the reamer connecting rod 9 from moving up and down and shaking left and right.

The planar bearing 11 and the deep groove ball bearing 12 are used in a matched mode, so that the rotating flexibility of the reamer connecting rod 9 can be guaranteed, the reamer connecting rod 9 is only driven by the motor connecting rod 10 to rotate in the circumferential direction, and the reamer 13 can be driven to rotate in the circumferential direction synchronously. Of course, it is also possible to fix the reamer spindle 9 using only the flat bearings 11 or the deep groove ball bearings 12, but it may be possible to make the rotation of the reamer spindle 9 less effective. Therefore, the type, the size and the like of the bearing can be determined according to actual conditions and actual requirements in the actual application process.

On the basis of the in-hole scale removing device, preferably, the limiting device comprises a fixing plate 5 arranged on the supporting base plate 4 and used for supporting the product 7, a guide post 6 arranged on the fixing plate 5 and used for fixing the product 7, and a guide plate 8 arranged on the fixing plate 5 and used for limiting the rotation of the product 7, wherein an opening used for allowing the reamer 13 to pass through is arranged between the guide plate 8 and the fixing plate 5 in a penetrating way, so that the reamer 13 can be inserted into the hole of the product 7 in an aligning way.

The stopper here includes a fixed plate 5 provided on the support base plate 4, a guide post 6 provided on the fixed plate 5, and a guide plate 8 provided on the fixed plate 5. Wherein, the fixed plate 5 is used for supporting the product 7, and the guide pillar 6 arranged on the fixed plate 5 is used for fixing the position and height of the product 7, that is, the position and height of the product 7 can be adjusted by adjusting the position and height of the guide pillar 6, so that the product 7 is matched with the reamer 13 in position and height, the reamer 13 can be aligned to the inside of the hole of the product 7 to be processed, and finally the reamer 13 can be convenient for removing the in-hole oxide skin and the in-hole oil dirt of the product 7. The guide plate 8 provided on the fixed plate 5 is mainly used to restrict the rotation of the product 7 because if the product 7 and the reamer 13 are both rotated, scale and oil in the hole cannot be removed well. Therefore, it is necessary to restrict the rotation of the product 7 so that the product 7 does not rotate when the reamer 13 rotates, so that the reamer 13 can smoothly remove the scale and oil stain in the hole of the product 7. Furthermore, an opening is provided between the guide plate 8 and the fixed plate 5 for the passage of the reamer 13, so that the reamer 13 can be aligned with the hole into which the product 7 is inserted.

Therefore, the specific shape, size and position of the fixing plate 5, the guide post 6, the guide plate 8 and the opening can be determined according to actual conditions and actual requirements during actual application and according to specific conditions of the product 7, so as to ensure that the reamer 13 can be inserted into the hole of the product 7 in an aligned manner and the product 7 cannot rotate during processing.

On the basis of the in-hole scale removing device, the guide post 6 and the guide plate 8 are preferably detachably connected with the fixed plate 5.

The guide post 6 is detachably connected to the fixed plate 5, and the guide plate 8 is detachably connected to the fixed plate 5. The position and the height of the guide post 6 and the guide plate 8 are convenient to adjust, so that the limiting device can be suitable for different shaft part products 7, different products 7 can be fixedly supported, the products 7 are limited to rotate, and finally the in-hole oxide scale removing device can improve the applicability and enlarge the application range.

Preferably, the guide post 6 and the fixed plate 5 and the guide plate 8 and the fixed plate 5 are connected through bolts and nuts, so that the guide post 6 and the guide plate 8 can be maintained, debugged and the like. Of course, other detachable connections may be used to secure the guide post 6 and guide plate 8.

On the basis of the in-hole scale removing device, preferably, the size of the guide pillar 6 is matched with the size of the center hole of the product 7, and the guide pillar 6 is in clearance fit with the product 7 so as to be convenient for taking the product 7.

It should be noted that the product 7 is mainly a shaft component, which is generally provided with a central hole with high precision, but the central hole is not a hole for removing scale and oil dirt in the present application, so that the central hole can be used for primarily fixing the product 7 in position and then processing the hole for removing scale and oil dirt. The guide post 6 is sized to fit the central hole of the product 7, so that the product 7 can be inserted into the guide post 6 through the central hole for primary fixation. The guide post 6 is in clearance fit with the product 7, so that the product 7 can be conveniently taken down after the processing operation is finished. Therefore, in the actual application process, the size of the guide post 6 needs to be matched with the size of the product 7, that is, the arrangement of the guide post 6 can be determined according to the specific situation of the product 7.

On the basis of the above-described in-hole descaling device, it is preferable that the shape of the guide plate 8 is matched with the shape of the shaped portion of the product 7 to restrict the rotation of the product 7.

It should be noted that the shape of the guide plate 8 is matched with the shape of the special-shaped portion of the product 7, because the special-shaped portion is arranged outside the product 7, the guide plate 8 can be configured to be matched with the special-shaped portion of the product 7, so that the special-shaped portion of the product 7 can be clamped and fixed, the phenomenon that the product 7 rotates or falls off in the machining operation process is avoided, and finally the reamer 13 is subjected to accurate machining operation. Therefore, the shape and size of the guide plate 8 need to be matched with the specific shape and size of the product 7 and the like.

On the basis of the in-hole scale removing device, preferably, the fixing device is detachably connected with the supporting base plate 4, and the limiting device is detachably connected with the supporting base plate 4.

It should be noted that the fixing device is detachably connected to the supporting base plate 4, and the limiting device is detachably connected to the supporting base plate 4. The device is convenient for adjusting the positions of the fixing device and the limiting device, so that the reamer 13 and the product 7 can be aligned and contacted, and the device can be suitable for different products 7, namely the application range of the in-hole oxide scale removing device can be enlarged.

In addition, the fixing device, the limiting device and the supporting bottom plate 4 can be detached, so that even if the fixing device or the limiting device has the phenomenon of device damage, the damaged device can be replaced, and the fixing device and the limiting device can be continuously matched with the undamaged device for use. Therefore, fixing device, stop device and supporting baseplate 4 can be dismantled, will be convenient for maintain and adjust downthehole cinder remove device, finally can improve the life of device and reduce the cost of maintenance of device.

Preferably, the fixing device and the supporting base plate 4 and the limiting device and the supporting base plate 4 can be connected through bolts and nuts, so that the positions of the fixing device and the limiting device can be adjusted and maintained. Of course, other detachable connection modes can be adopted for connection, so that the connection modes of the fixing device and the supporting bottom plate 4 and the connection modes of the limiting device and the supporting bottom plate 4 can be determined according to actual conditions and actual requirements in the actual application process.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Any combination of all embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.

The in-hole scale removing apparatus provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (9)

1. An in-hole oxide scale removing device, comprising: supporting baseplate (4), reamer (13) that are used for getting rid of the downthehole oxide scale of product (7) and downthehole oil dirt, with what reamer (13) are connected is used for the drive reamer (13) pivoted drive arrangement, be used for setting the fixing device of reamer (13), be used for fixing and press from both sides tightly the stop device of product (7), fixing device with stop device all sets up on supporting baseplate (4), fixing device with stop device's position cooperatees, so that reamer (13) are aimed at and are inserted the downthehole of product (7).

2. The in-hole oxide skin removing device according to claim 1, wherein the driving device is a motor (1), the motor (1) is connected with a motor connecting rod (10), the reamer (13) is connected with a reamer connecting rod (9), and the reamer connecting rod (9) is connected with the motor connecting rod (10), so that the motor (1) drives the reamer (13) to rotate.

3. An in-hole scale removing apparatus as defined in claim 2, wherein the fixing means comprises: the reamer connecting rod connecting device is characterized in that a bearing plate (3) used for supporting a reamer (13), which is arranged on the supporting base plate (4), is arranged in the bearing plate (3) and used for fixing a bearing of the reamer connecting rod (9), and a connecting sleeve (2) connected with the bearing plate (3) and used for fixing the reamer connecting rod (9) and the motor connecting rod (10).

4. The in-hole scale removing device according to claim 3, wherein the bearing comprises a planar bearing (11) and a deep groove ball bearing (12) which are nested on the reamer connecting rod (9), the planar bearing (11) is used for supporting the reamer connecting rod (9), and the deep groove ball bearing (12) is used for avoiding the reamer connecting rod (9) from moving.

5. The in-hole scale removing device according to any one of claims 1 to 4, wherein the limiting device comprises a fixing plate (5) arranged on the supporting bottom plate (4) and used for supporting the product (7), a guide post (6) arranged on the fixing plate (5) and used for fixing the product (7), and a guide plate (8) arranged on the fixing plate (5) and used for limiting the rotation of the product (7), wherein an opening used for enabling the reamer (13) to pass through is arranged between the guide plate (8) and the fixing plate (5) in a penetrating way, so that the reamer (13) can be inserted into the hole of the product (7) in an aligning way.

6. An in-hole scale removing apparatus as claimed in claim 5, wherein the guide post (6) and the guide plate (8) are both detachably connected to the fixing plate (5).

7. An in-hole scale removing apparatus as claimed in claim 6, wherein said guide post (6) is dimensioned to fit the central hole of said product (7), said guide post (6) being a clearance fit with said product (7) to facilitate access to said product (7).

8. An in-hole scale removing apparatus as claimed in claim 7, characterized in that the shape of the guide plate (8) is matched to the shape of the profiled part of the product (7) to limit the rotation of the product (7).

9. An in-hole scale removing apparatus as claimed in any one of claims 1 to 4, wherein said fixing means is detachably connected to said support base plate (4), and said limiting means is detachably connected to said support base plate (4).

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