High-precision inner hole rolling cutter

Abstract

The utility model relates to the technical field of machining, in particular to a high-precision inner hole rolling cutter which comprises a cutter body distributed in the first direction, and through holes distributed in the second direction are formed in one end of the cutter body. The central liquid channel is arranged in the cutter body in the first direction and is communicated with the through hole; the positioning part is arranged in the through hole; the rolling ball is partially nested in the through hole, one side of the rolling ball abuts against the positioning part, and the other side of the rolling ball extends out of the through hole; the diameter of the rolling ball is larger than that of the opening of the through hole; and a pressure sensor is arranged in the positioning part and is used for detecting the pressure transmitted to the positioning part by the rolling ball. Due to the fact that the center liquid channel is arranged in the cutter body, external high-pressure cutting liquid can directly flow to the through hole from the inside of the cutter body, and then the rolling ball is cooled and lubricated. Meanwhile, the pressure sensor is arranged in the positioning part, the pressure in the rolling process is detected in real time, an operator can adjust the rolling process conveniently, and the workpiece is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of machining, especially to a high-precision inner hole roll press cutter. BACKGROUND

[0002] The existing pulley is often required to have high roughness in key processes such as fine turning inner hole process because the inner hole of the pulley is matched with the bearing, so the machining precision of the machining tool is required to be high. The inner hole is usually turned by a blade to ensure the size and roughness of the inner hole. However, the blade needs to be frequently replaced to ensure small roughness, the service life of the blade is low, the processing cost is high, the size is unstable, and the inner hole size and roughness need to be fully inspected during production, so the production control cost is high.

[0003] Rolling processing is a chipless processing, which applies a certain pressure to the surface of a workpiece through a certain form of rolling tool. At room temperature, the microscopically uneven surface of the workpiece is flattened by plastic deformation of the metal, so as to change the surface structure, mechanical properties, shape and size. Therefore, this method can achieve the purposes of finishing and strengthening at the same time.

[0004] The patent file with the announcement number CN221047719U discloses a hard alloy ball roll press cutter, which comprises: a cutter body, an arc groove is formed at one end of the cutter body; an arc groove bearing is arranged in the arc groove; a bracket is arranged at the end of the arc groove bearing through a tightening screw; and a hard alloy ball is arranged on the bracket.

[0005] However, the pressure of the rolling process is still difficult to control, and the workpiece is easily damaged when the wall thickness of the workpiece is thin. Moreover, the rolling process uses external pouring of cooling liquid, which cannot cool down and flush out the waste chips in time when the machining space is narrow, and still needs to be improved. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is to provide a high-precision inner hole roll press cutter to solve the problems of large control difficulty of the existing roll press cutter and easy damage of the workpiece during the machining process.

[0007] In order to solve the above technical problems, the utility model adopts the technical scheme of: a high-precision inner hole roll press cutter, comprising

[0008] The cutter body is distributed along the first direction, and an through hole is formed at one end of the cutter body along the second direction;

[0009] The central liquid channel is arranged in the cutter body along the first direction and communicates with the through hole;

[0010] The positioning part is arranged in the through hole;

[0011] A rolling ball is partially nested in the through hole, one side of the rolling ball abuts against the positioning part, and the other side of the rolling ball extends to the outside of the through hole;

[0012] The diameter of the rolling ball is greater than the diameter of the opening of the through hole; the positioning part is provided with a pressure sensor, and the pressure sensor is used for detecting the pressure transmitted to the positioning part by the rolling ball.

[0013] Further, the positioning part comprises a positioning block and a fastener, the fastener is detachably connected with the cutter body, and the positioning block is located between the rolling ball and the fastener.

[0014] Further, the pressure sensor is arranged between the positioning block and the fastener.

[0015] Further, a locking piece is arranged on the cutter body in a first direction, and the locking piece abuts against the fastener.

[0016] Further, the through hole comprises a first stepped hole and a second stepped hole, the hole diameter of the second stepped hole gradually expands from the surface of the cutter body to the first stepped hole; the positioning part is arranged in the first stepped hole, and the rolling ball is arranged in the second stepped hole.

[0017] Further, the diameter of the rolling ball is greater than the minimum diameter of the second stepped hole.

[0018] Further, the positioning block and the side wall of the first stepped hole have a liquid flow gap, and the central liquid channel is in communication with the liquid flow gap.

[0019] Further, the side wall of the second stepped hole is provided with a liquid flow groove.

[0020] Further, the positioning part and the rolling ball have an adjustment gap.

[0021] Further, a tool seat is arranged, one end of the cutter body away from the rolling ball is connected with the tool seat, and the tool seat drives the cutter body to move.

[0022] The utility model discloses the beneficial effect lies in: the utility model discloses the central liquid channel is set up in the cutter body, so that the high pressure cutting fluid of outside can directly flow to the through hole from the cutter body inside, and then cool and lubricate the rolling ball. Meanwhile, the utility model discloses the pressure sensor is set up in the positioning part, and the pressure of rolling process is detected in real time, and the operator is convenient for adjusting the rolling process, avoids the workpiece damage, and improves the yield. ACCURACY OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the present application.

[0025] Figure 2 It is a sectional view of a tool body in an embodiment of the present application.

[0026] Figure 3 It is a sectional view of a tool body in another embodiment of the present application.

[0027] Label explanation:

[0028] 1, tool body; 11, through hole; 111, first stepped hole; 112, second stepped hole; 113, flow liquid gap; 114, flow liquid groove; 12, center liquid channel; 13, positioning part; 131, positioning block; 132, fastener; 133, pressure sensor; 134, locking piece; 14, rolling ball;

[0029] 2, tool holder; 3, workpiece; A, first direction; B, second direction. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] The existing roll press tool is difficult to control, and the workpiece is prone to damage during the machining process.

[0033] Based on this, please refer to Figures 1 to 3 The utility model provides a high accuracy inner hole roll press tool, including cutter body 1, center liquid channel 12, positioning part 13 and roll press ball 14. Cutter body 1 is along the first direction distribution, and the one end of cutter body 1 is provided with the through hole 11 along the second direction distribution. Specifically, as shown in Figure 2 The first direction and the second direction are perpendicular to each other, and in the embodiment, the horizontal direction (the direction A in the figure) is the first direction, and the vertical direction (the direction B in the figure) is the second direction. The skilled person in the art can set appropriate first direction and second direction according to the need, without specific limitation. The center liquid channel 12 is arranged in the cutter body 1 along the first direction and is communicated with the through hole 11. That is, the cutter body 1 is provided with a flow channel distributed along the axial direction, so that the external high-pressure cutting fluid can pass to the through hole 11 and be sprayed onto the workpiece 3 from the through hole 11, thereby cleaning the workpiece 3 and lubricating and cooling the roll press ball 14. Specifically, the diameter of the center liquid channel 12 can be adjusted by the skilled person in the art according to the need, so that the cutting fluid can flow smoothly to the through hole 11, without specific limitation.

[0034] The positioning part 13 is arranged in the through hole 11, and the roll press ball 14 is partially nested in the through hole 11. One side of the roll press ball 14 abuts against the positioning part 13, and the other side of the roll press ball 14 extends out of the through hole 11. Specifically, the positioning part 13 is arranged at one end of the through hole 11, limiting the position of the roll press ball 14, mechanically positioning the roll press ball 14, and making the roll press ball 14 partially exposed outside the cutter body 1.

[0035] The diameter of the roll press ball 14 is greater than the diameter of the opening of the through hole 11. This arrangement can prevent the roll press ball 14 from coming out and avoid safety problems. At the same time, the positioning part 13 is provided with a pressure sensor 133, which is used to detect the pressure transmitted by the roll press ball 14 to the positioning part 13. This arrangement enables the operator to adjust the roll press process of the high-precision inner hole roll press tool according to the real-time feedback pressure, preventing the workpiece 3 from being damaged and scrapped due to excessive stress on the unit area of the workpiece 3, and effectively improving the operability of the high-precision inner hole roll press tool. Specifically, the skilled person in the art can select a pressure sensor 133 of appropriate specification according to the need, without specific limitation.

[0036] It can be understood that, by arranging the center liquid channel 12 in the cutter body 1, the external high-pressure cutting fluid can directly flow from the inside of the cutter body 1 to the through hole 11, thereby cooling and lubricating the roll press ball 14. At the same time, by arranging the pressure sensor 133 in the positioning part 13, the pressure of the roll press process is monitored in real time, which facilitates the operator to adjust the roll press process and avoids damage to the workpiece 3, thereby improving the yield.

[0037] Preferably, the material of the rolling ball 14 can be tungsten steel, and the material of the positioning part 13 can be bearing steel. In this way, the positioning effect of the positioning part 13 on the rolling ball 14 can be ensured, and the rolling effect and service life of the rolling ball 14 can be ensured.

[0038] Preferably, the center liquid channel 12 is provided with a liquid inlet at one end away from the through hole 11, so that the center liquid channel 12 can be quickly connected with an external liquid supply device, the installation process is simplified, and the sealing performance is improved. Specifically, as shown in Figure 2 , the center liquid channel 12 can pass through the tool body 1 and is sealed at one end close to the through hole 11, so that the machining is facilitated.

[0039] Further, the positioning part 13 includes a positioning block 131 and a fastener 132, the fastener 132 is detachably connected with the tool body 1, and the positioning block 131 is located between the rolling ball 14 and the fastener 132. Specifically, the fastener 132 can be a bolt screwed in the through hole 11, and the end of the bolt abuts against the positioning block 131 to limit the position of the positioning block 131, and further limit the position of the rolling ball 14. In this way, the operator can conveniently replace the positioning block 131 and the rolling ball 14, the maintenance operation is simplified, and the work efficiency is improved.

[0040] Further, as shown in Figure 2 and Figure 3 , the pressure sensor 133 is arranged between the positioning block 131 and the fastener 132. In this way, the point contact between the rolling ball 14 and the positioning block 131 can be converted into the surface contact between the positioning block 131 and the fastener 132, the local excessive force on the pressure sensor 133 can be avoided, and thus the detection accuracy and service life of the pressure sensor 133 are improved.

[0041] Further, a locking member 134 is arranged on the tool body 1 in the first direction, and the locking member 134 abuts against the fastener 132. After the locking member 134 is arranged, the fastener 132 can be prevented from loosening due to vibration and other factors during the rolling process, and the safety is further improved.

[0042] Further, the through hole 11 includes a first stepped hole 111 and a second stepped hole 112, the hole diameter of the second stepped hole 112 gradually increases from the surface of the tool body 1 to the first stepped hole 111; the positioning part 13 is arranged in the first stepped hole 111, and the rolling ball 14 is arranged in the second stepped hole 112. In this way, the operator can conveniently install the rolling ball 14 and the positioning part 13, the maintenance is facilitated, and the work efficiency is improved.

[0043] Further, the diameter of the rolling ball 14 is greater than the minimum diameter of the second stepped hole 112.

[0044] Further, the positioning block 131 and the side wall of the first stepped hole 111 have a flow liquid gap 113, and the central liquid channel 12 communicates with the flow liquid gap 113. After the flow liquid gap 113 is arranged, the flow of the cutting fluid is smoother, the cutting fluid flows out along the central liquid channel 12, the flow liquid gap 113 and the second stepped hole 112, and the lubrication and cooling effect on the rolling ball 14 and the cleaning effect on the workpiece 3 are ensured. Specifically, the fastener 132 is sealed with the through hole 13 to prevent the cutting fluid from leaking from the fastener 132.

[0045] Preferably, the pressure sensor 133 is arranged at the end of the fastener 132 and is sealed to avoid the influence of high-pressure cutting fluid on the accuracy of the pressure sensor 133.

[0046] Further, as shown in Figure 3 the side wall of the second stepped hole 112 is provided with a flow liquid groove 114. After the flow liquid groove 114 is arranged, the cutting fluid can flow out more smoothly from the second stepped hole 112, and the rolling ball 14 and the through hole 11 are prevented from being too tightly contacted to cause the cutting fluid to flow out, thereby ensuring the cleaning effect on the workpiece 3. Specifically, the flow liquid groove 114 is distributed along the second direction, and a plurality of flow liquid grooves 114 can be arranged around the rolling ball 14. Those skilled in the art can adjust the shape and number of the flow liquid groove 114 according to the needs, and no specific limitation is made.

[0047] Further, the positioning part 13 and the rolling ball 14 have an adjustment gap. After the adjustment gap is arranged, the positioning part 13 and the rolling ball 14 are prevented from being too tightly contacted, a buffer allowance is provided, and the service life of the high-precision internal hole rolling tool is improved. Preferably, those skilled in the art can adjust the specifications of the positioning block 131 to control the size of the adjustment gap.

[0048] Further, the tool holder 2 is further included, one end of the tool body 1 away from the rolling ball 14 is connected with the tool holder 2, and the tool holder 2 drives the tool body 1 to move. In this way, the tool body 1 can be integrally disassembled and applied to different specifications of machine tools, and the overall adaptability is improved.

[0049] Please refer to Figure 1 and Figure 3 Embodiment one of the utility model is: a high-precision internal hole rolling tool, comprising

[0050] the tool body 1 is distributed along the first direction, and one end of the tool body 1 is provided with the through hole 11 distributed along the second direction;

[0051] the central liquid channel 12 is arranged in the tool body 1 along the first direction and communicates with the through hole 11;

[0052] the positioning part 13 is arranged in the through hole 11;

[0053] The rolling ball 14 is partially nested in the through hole 11, one side of the rolling ball 14 abuts against the positioning part 13, and the other side of the rolling ball 14 extends out of the through hole 11;

[0054] The diameter of the rolling ball 14 is greater than the diameter of the opening of the through hole 11; the positioning part 13 is provided with a pressure sensor 133, and the pressure sensor 133 is used for detecting the pressure transmitted by the rolling ball 14 to the positioning part 13.

[0055] The positioning part 13 comprises a positioning block 131 and a fastener 132, the fastener 132 is detachably connected with the tool body 1, and the positioning block 131 is located between the rolling ball 14 and the fastener 132. The pressure sensor 133 is arranged between the positioning block 131 and the fastener 132. A locking piece 134 is arranged on the tool body 1 in the first direction, and the locking piece 134 abuts against the fastener 132. The fastener 132 is a bolt, and the fastener 132 is screwed in the through hole 11. The end of the bolt abuts against the positioning block 131, thereby limiting the position of the positioning block 131 and the position of the rolling ball 14.

[0056] In the embodiment, the through hole 11 comprises a first stepped hole 111 and a second stepped hole 112, the hole diameter of the second stepped hole 112 gradually expands from the surface of the tool body 1 to the first stepped hole 111; the positioning part 13 is arranged in the first stepped hole 111, and the rolling ball 14 is arranged in the second stepped hole 112.

[0057] In the embodiment, the second stepped hole 112 is provided with a liquid flow groove 114. The liquid flow groove 114 is distributed in the second direction and arranged around the rolling ball 14.

[0058] In the embodiment, the material of the rolling ball 14 is tungsten steel, and the material of the positioning part 13 is bearing steel.

[0059] In the embodiment, the tool holder 2 is further arranged, and the end of the tool body 1, which is away from the rolling ball 14, is connected with the tool holder 2, and the tool holder 2 drives the tool body 1 to move.

[0060] The working principle of the utility model is as follows: the operator operates the tool holder 2, so that the tool body 1 enters the inner hole of the workpiece 3 to be machined. After the rolling ball 14 of the tool body 1 moves to the predetermined position, the cutting fluid is introduced into the center liquid channel 12 to flush the inner hole of the workpiece 3. Then, the rolling ball 14 rolls the inner hole of the workpiece 3. During the rolling, the operator can adjust the rolling parameters of the rolling ball 14 according to the pressure feedback in real time by the pressure sensor 133.

[0061] Although the terms such as tool body, through hole, first stepped hole, second stepped hole, flowing liquid gap, flowing liquid groove, central liquid channel, positioning part, positioning block, fastener, pressure sensor, locking member, rolling ball, tool holder, workpiece, etc. are used more in this paper, the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the utility model; any additional limitation by interpreting them is contrary to the spirit of the utility model.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A high-precision internal hole roll-pressing tool, characterized by: The utility model relates to a cutting tool, including A cutter body is distributed along a first direction, and a through hole is arranged on one end of the cutter body and distributed along a second direction; A central liquid channel is arranged in the cutter body along the first direction and communicates with the through hole; A positioning part is arranged in the through hole; A rolling ball is partially nested in the through hole, one side of the rolling ball abuts against the positioning part, and the other side of the rolling ball extends out of the through hole; The diameter of the rolling ball is greater than the diameter of the opening of the through hole; the positioning part is provided with a pressure sensor, and the pressure sensor is used for detecting the pressure transmitted to the positioning part by the rolling ball.

2. The high-precision internal hole roll-pressing cutter according to claim 1, characterized in that: The positioning part includes a positioning block and a fastener, the fastener is detachably connected with the cutter body, and the positioning block is located between the rolling ball and the fastener.

3. The high-precision internal hole roll-pressing cutter according to claim 2, characterized in that: The pressure sensor is arranged between the positioning block and the fastener.

4. The high-precision internal hole roll-pressing cutter according to claim 2, characterized in that: Further comprising a locking piece, the locking piece is arranged on the cutter body along the first direction, and the locking piece abuts against the fastener.

5. The high precision internal hole roll-pressing tool according to claim 2, characterized in that: The through hole includes a first stepped hole and a second stepped hole, the aperture of the second stepped hole gradually expands from the surface of the cutter body to the first stepped hole; the positioning part is arranged in the first stepped hole, and the rolling ball is arranged in the second stepped hole.

6. The high-precision internal hole roll-pressing cutter according to claim 5, characterized in that: The diameter of the rolling ball is greater than the minimum diameter of the second stepped hole.

7. The high-precision internal hole roll-pressing cutter according to claim 5, characterized in that: There is a liquid flow gap between the positioning block and the side wall of the first stepped hole, and the central liquid channel communicates with the liquid flow gap.

8. The high-precision internal hole roll-pressing cutter according to claim 7, characterized in that: The side wall of the second stepped hole is provided with a liquid flow groove.

9. The high precision hole rolling tool of claim 1 wherein: There is an adjustment gap between the positioning part and the rolling ball.

10. The high precision hole rolling tool of claim 1 wherein: Further comprising a tool seat, one end of the cutter body away from the rolling ball is connected with the tool seat, and the tool seat drives the cutter body to move.

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