Flexible automatic clamp structure

Abstract

The utility model belongs to the technical field of mechanical equipment machining, and particularly relates to a flexible automatic clamp structure. Comprising a machining platform used for supporting a machined part, a clamping assembly used for clamping the machined part on the machining platform, and a driving assembly used for driving the clamping assembly to horizontally move on the machining platform. The clamping assembly is installed on the driving assembly, the machining platform is used for providing support for horizontal movement needing to be conducted when the driving assembly drives the clamping assembly, the machining base is used for supporting a machined part, the upper computer is used for controlling the working states of the driving assembly and the clamping assembly, the machining platform and the driving assembly are both installed on the machining base, and the clamping assembly is installed on the driving assembly. The driving assembly and the clamping assembly are both connected with the upper computer. The utility model provides a flexible automatic clamp structure which aims to solve the problem that in the prior art, when a clamping assembly of flexible clamp equipment clamps a machined part with low hardness, the machined part is likely to be damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment processing, and particularly relates to a flexible automatic fixture structure. Background Art

[0002] Flexible fixtures are a type of fixture technology used in manufacturing, and their core is the ability to adapt to changes in the shapes and sizes of different workpieces. Compared with traditional fixtures, flexible fixtures offer greater adaptability and flexibility, and can efficiently process a variety of workpieces in a rapidly changing production environment.

[0003] Currently, flexible machining is only used in the production of large quantities of standard workpieces. For non-standard workpieces with multiple varieties and small batches, the application of flexible machining technology is not widespread. There are also flexible fixtures on the market that can adapt to a variety of workpieces, but in existing flexible fixture equipment, the clamping degree of the clamping component is preset and fixed, usually clamping the workpiece to be completely tightened to achieve the clamping effect. This clamping method may damage the workpiece when clamping workpieces with a lower hardness in the clamping part. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a flexible automatic fixture structure to solve the problem that the clamping component of the flexible fixture equipment in the prior art may damage the workpiece when clamping a workpiece with a lower hardness.

[0005] One solution of the utility model provides a flexible automatic fixture structure, including

[0006] A processing platform for providing support for the workpiece;

[0007] A clamping component for clamping the workpiece on the processing platform;

[0008] A driving component for driving the clamping component to move horizontally on the processing platform;

[0009] A processing base for providing support for the horizontal movement required for the driving component to drive the clamping component, and for supporting the workpiece;

[0010] A host computer for controlling the working states of the driving component and the clamping component;

[0011] The processing platform and the driving component are both installed on the processing base, and the clamping component is installed on the driving component;

[0012] The driving component and the clamping component are both connected to the host computer.

[0013] It should be noted that the driving component and the clamping component are both electrically connected to the host computer. The host computer processes the electrical signals from the driving component and the clamping component through an internal processor, and transmits the data to the PLC inside the host computer. The PLC outputs control signals to correspondingly control the working states of the driving component and the clamping component.

[0014] In this solution, after the user places the workpiece at the corresponding position on the processing platform, the host computer can be used to control the clamping component and the driving component to start working. During the working process, the driving component will drive the clamping component to move horizontally on the processing platform to drive the clamping component to clamp the workpiece. During this process, the host computer can obtain and control the working states of the clamping component and the driving component in real time, which can avoid the situation that the driving component drives the clamping component to excessively squeeze the workpiece and cause damage to the workpiece.

[0015] In one of the solutions, the driving component includes an electric guide rail, a slider is movably connected to the electric guide rail, a movable seat is installed on the slider, the movable seat moves on the electric guide rail following the slider, and an installation block for installing the clamping component is arranged on the movable seat; the electric guide rail is electrically connected to the host computer, and the electric guide rail is connected to an external energy supply device.

[0016] It should be noted that the host computer can control the movement of the slider on the electric guide rail by sending a control signal, control the synchronous movement of the movable seat through the movement of the slider, and the installation block on the movable seat moves synchronously under the movement of the movable seat to drive the clamping component installed on the installation block to move synchronously; during this process, the host computer can control the movement of the slider on the electric guide rail in real time to realize the control of the working state of the driving component.

[0017] In one of the solutions, an installation opening for accommodating the clamping component and a processing opening for processing the workpiece are arranged on the processing platform;

[0018] The clamping component includes a fastening component and a clamping component. The fastening component is a lead screw. The clamping component includes a fixed part for limiting the workpiece and a movable part for fastening the workpiece. The fixed part is installed on one side of the processing opening, and the movable part is installed on the lead screw;

[0019] One end of the lead screw penetrates through the installation block, and the other end of the lead screw is fixedly connected to the side of the movable part away from the fixed part;

[0020] A nut is movably installed on the lead screw, and a spring is arranged between the nut and the side of the movable part away from the fixed part.

[0021] In this solution, the upper computer can control the operation of the electric guide rail so that the mounting block drives the lead screw to move, and then synchronously drives the movable part installed on the lead screw to move horizontally toward the fixed part. After the movable part cooperates with the fixed part to clamp the workpiece in the middle, the mounting block and the lead screw maintain a horizontal movement state. At this time, the movable part and the fixed part gradually tighten the clamping of the workpiece, and the nut squeezes the spring toward the movable part under the push of the mounting block. In this process, the spring can, on the one hand, strengthen the clamping tightness of the movable part and the workpiece, and on the other hand, reduce the squeezing of the workpiece by the movable part, so that the clamping assembly can achieve gradual tightening and clamping of the workpiece on the basis of being able to control the clamping force of the movable part.

[0022] In one of the solutions, an expansion support plate is provided at a position of the processing base corresponding to the processing port.

[0023] In one of the schemes, a fixing threaded hole is provided on the fixing part, and a platform threaded hole corresponding to the fixing threaded hole is provided at a position of the processing platform corresponding to the fixing part. The internal threads of the fixing threaded hole and the platform threaded hole are the same, and the fixing threaded hole and the platform threaded hole are connected by bolts. The fixing part is fixedly installed on one side of the processing port by bolts in conjunction with the fixing threaded hole and the platform threaded hole.

[0024] In one of the schemes, the movable part includes a fixed block and an elastic block connected to each other, the elastic block is fixedly connected to one side of the fixed block close to the workpiece, and the other side of the fixed block is fixedly connected to the screw rod.

[0025] It should be noted that the elastic block can reduce the pressure from the fixed block, further control the clamping force increase speed of the clamping assembly, and also avoid damage to the workpiece during the clamping process due to the movable part material being too hard.

[0026] In one of the solutions, a pressure sensor is provided on a side of the elastic block close to the fixing portion, and the pressure sensor is wirelessly connected to the host computer.

[0027] In one of the solutions, the elastic block and the fixing part are made of flexible non-metallic materials, specifically rubber; rubber has a high friction coefficient, strong adhesion friction and hysteresis friction, and can effectively prevent the workpiece from slipping during the clamping process.

[0028] It should be noted that the pressure sensor can transmit the sensed pressure information to the host computer in real time, so that the host computer can monitor the force condition of the pressure sensor in real time, and then monitor the clamping force exerted on the workpiece during the clamping process in real time; in this process, the host computer can control the working state of the electric guide rail according to the real-time reading of the pressure sensor, so as to avoid damage to the workpiece due to excessive clamping force.

[0029] In one of the solutions, a support block is installed on the extended support plate. The support block is arranged on the extended support plate corresponding to the center of the processing port. An infrared sensor is provided on the top of the support block, and the infrared sensor is wirelessly connected to the host computer.

[0030] It should be noted that the infrared sensor is used to detect whether a workpiece is placed on the processing platform and transmit the information sensed by the infrared sensor to the host computer, so as to prevent the host computer from controlling the electric guide rail to work when there is no workpiece on the processing platform.

[0031] In one of the solutions, a plurality of assembly threaded holes are further provided around the processing port of the processing platform.

[0032] It should be noted that the assembly threaded holes can be used to install fixing blocks on the top and bottom of the workpiece to limit the top and bottom of the workpiece, facilitating the processing of the workpiece during the subsequent clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0034] Figure 1 It represents the overall structural schematic diagram of the flexible automatic fixture structure of the present invention;

[0035] Figure 2 It represents the structural schematic diagram of the driving component and part of the clamping component in the flexible automatic fixture structure of the present invention.

[0036] Among them, 1. Processing platform; 11. Installation port; 12. Processing port; 13. Assembly threaded hole; 2. Clamping component; 21. Fastening component; 211. Nut; 212. Spring; 22. Clamping component; 221. Fixed part; 2211. Fixed threaded hole; 222. Movable part; 2221. Fixed block; 2222. Elastic block; 22221. Pressure sensor; 3. Driving component; 31. Electric guide rail; 32. Slide block; 33. Movable seat; 34. Installation block; 4. Processing base; 41. Extended support plate; 5. Workpiece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] Please refer to Figure 1 , in one of the embodiments, one solution of the present invention provides a flexible automatic fixture structure, including

[0041] A processing platform 1 for providing support for a workpiece 5;

[0042] A clamping assembly 2 for clamping the workpiece 5 on the processing platform 1;

[0043] A driving assembly 3 for driving the clamping assembly 2 to move horizontally on the processing platform 1;

[0044] A processing base 4 for providing support for the horizontal movement required for the driving assembly 3 to drive the clamping assembly 2 and for supporting the workpiece 5;

[0045] A host computer for controlling the working states of the driving assembly 3 and the clamping assembly 2;

[0046] The processing platform 1 and the driving component 3 are both installed on the processing base 4, and the clamping component 2 is installed on the driving component 3;

[0047] Both the driving component 3 and the clamping component 2 are connected to the host computer.

[0048] It should be noted that the connections between the driving component 3 and the clamping component 2 and the host computer are all electrical connections. The host computer processes the electrical signals from the driving component 3 and the clamping component 2 through the internal processor and transmits the data to the PLC inside the host computer. The PLC outputs control signals to correspondingly control the working states of the driving component 3 and the clamping component 2.

[0049] In this solution, after the user places the workpiece 5 at the corresponding position on the processing platform 1, the clamping component 2 and the driving component 3 can be controlled by the host computer to start working. During the working process, the driving component 3 will drive the clamping component 2 to move horizontally on the processing platform 1 to drive the clamping component 2 to clamp the workpiece 5; during this process, the host computer can obtain and control the working states of the clamping component 2 and the driving component 3 in real time, which can avoid the situation that the driving component 3 drives the clamping component 2 to excessively squeeze the workpiece 5 and cause damage to the workpiece 5.

[0050] It should be noted that a clamping force range suitable for all materials corresponding to the processing is preset in the host computer. The user can read the clamping force range suitable for this material by pre-entering the material of the workpiece 5 in the host computer, and adjust the clamping force range according to the actual situation and then input it into the host computer to realize the reasonable control of the working state of the electric guide rail 31 by the host computer during the subsequent clamping process to avoid damaging the workpiece 5 due to excessive clamping force;

[0051] Taking the plastic workpiece 5 as an example, the user can pre-enter that the material of the workpiece 5 is polyoxymethylene (POM). The host computer automatically identifies that the clamping force range suitable for this material is 500 - 2000 Newtons and presets this value as the clamping force range during the subsequent clamping process. The user can then adjust this clamping force range adaptively according to factors such as the type and thickness of the workpiece 5 and then input it into the host computer;

[0052] Taking the metal workpiece 5 as an example, the user can pre-enter that the material of the workpiece 5 is aluminum alloy. The host computer automatically identifies that the clamping force range suitable for this material is 1500 - 5000 Newtons and presets this value as the clamping force range during the subsequent clamping process. The user can then adjust this clamping force range adaptively according to factors such as the type and thickness of the workpiece 5 and then input it into the host computer.

[0053] In one of the solutions, the driving assembly 3 includes an electric guide rail 31, a slider 32 is movably connected to the electric guide rail 31, a movable seat 33 is installed on the slider 32, the movable seat 33 moves on the electric guide rail 31 following the slider 32, and an installation block 34 for installing the clamping assembly 2 is arranged on the movable seat 33; the electric guide rail 31 is electrically connected to the upper computer, and the electric guide rail 31 is connected to an external energy supply device.

[0054] It should be noted that the upper computer can control the movement of the slider 32 on the electric guide rail 31 by sending a control signal, control the synchronous movement of the movable seat 33 through the movement of the slider 32, and the installation block 34 on the movable seat 33 moves synchronously under the movement of the movable seat 33 to drive the clamping assembly 2 installed on the installation block 34 to move synchronously; during this process, the upper computer can control the movement of the slider 32 on the electric guide rail 31 in real time to realize the control of the working state of the driving assembly 3.

[0055] In one of the solutions, an installation opening 11 for accommodating the clamping assembly 2 and a processing opening 12 for processing the workpiece 5 are arranged on the processing platform 1;

[0056] The clamping assembly 2 includes a fastening member 21 and a clamping member 22. The fastening member 21 is a lead screw. The clamping member 22 includes a fixing portion 221 for limiting the workpiece 5 and a movable portion 222 for fastening the workpiece 5. The fixing portion 221 is installed on one side of the processing opening 12, and the movable portion 222 is installed on the lead screw;

[0057] One end of the lead screw penetrates through the installation block 34, and the other end of the lead screw is fixedly connected to the side of the movable portion 222 away from the fixing portion 221;

[0058] A nut 211 is movably installed on the lead screw, and a spring 212 is arranged between the nut 211 and the side of the movable portion 222 away from the fixing portion 221.

[0059] In this solution, the host computer can control the operation of the electric guide rail 31, so that the mounting block 34 drives the lead screw to move, and then synchronously drives the movable part 222 mounted on the lead screw to horizontally move towards the fixed part 221. After the movable part 222 cooperates with the fixed part 221 to clamp the workpiece 5 in the middle, the mounting block 34 and the lead screw maintain a horizontal moving state. At this time, the clamping of the movable part 222 and the fixed part 221 on the workpiece 5 is gradually tightened, and the nut 211 squeezes the spring 212 towards the movable part 222 under the push of the mounting block 34; in this process, on the one hand, the spring 212 can strengthen the clamping tightness between the movable part 222 and the workpiece 5, and on the other hand, it can reduce the extrusion of the workpiece 5 by the movable part 222, so that the clamping assembly 2 can realize the gradual tightening clamping of the workpiece 5 on the basis of being able to control the clamping force of the movable part 222.

[0060] In one of the solutions, an extended support plate 41 is provided at the position of the processing base 4 corresponding to the processing port 12.

[0061] In one of the solutions, a support block (not shown) is installed on the extended support plate 41. The support block (not shown) is arranged on the extended support plate 41 corresponding to the center of the processing port 12. An infrared sensor (not shown) is provided at the top of the support block (not shown), and the infrared sensor (not shown) is wirelessly connected to the host computer.

[0062] It should be noted that the infrared sensor (not shown) is used to detect whether the workpiece 5 is placed on the processing platform 1 and transmit the information sensed by the infrared sensor (not shown) to the host computer, so as to prevent the host computer from controlling the operation of the electric guide rail 31 when there is no workpiece 5 on the processing platform 1.

[0063] In addition, the extended support plate 41 can also be used to install other auxiliary processing components or equipment, including but not limited to label printers, welding machines, copper plating machines, etc.

[0064] In one of the solutions, a fixed threaded hole 2211 is provided on the fixed part 221. A platform threaded hole (not shown) corresponding to the fixed threaded hole 2211 is provided at the position of the processing platform 1 corresponding to the fixed part 221. The internal threads of the fixed threaded hole 2211 and the platform threaded hole (not shown) are the same. The fixed threaded hole 2211 and the platform threaded hole (not shown) are connected by a bolt (not shown). The fixed part 221 is fixedly installed on one side of the processing port 12 by the bolt (not shown) cooperating with the fixed threaded hole 2211 and the platform threaded hole (not shown).

[0065] In one of the solutions, the movable part 222 includes a fixed block 2221 and an elastic block 2222 which are connected to each other. The elastic block 2222 is fixedly connected to the side of the fixed block 2221 close to the workpiece 5, and the other side of the fixed block 2221 is fixedly connected to the lead screw.

[0066] It should be noted that the elastic block 2222 can relieve the pressure from the fixed block 2221, further control the rising speed of the clamping force of the clamping assembly 2, and at the same time avoid the situation that the workpiece 5 is damaged during the clamping process due to the too hard material of the movable part 222.

[0067] In one of the solutions, a pressure sensor 22221 is provided on the side of the elastic block 2222 close to the fixed part 221, and the pressure sensor 22221 is wirelessly connected to the host computer.

[0068] In one of the solutions, the materials of the elastic block 2222 and the fixed part 221 are both flexible non-metallic materials, specifically rubber; rubber has a high friction coefficient, strong adhesion friction force and hysteresis friction force, which can effectively prevent the workpiece 5 from slipping during the clamping process.

[0069] It should be noted that the pressure sensor 22221 can transmit the sensed pressure information to the host computer in real time, so that the host computer can monitor the force condition of the pressure sensor 22221 in real time, and then monitor the clamping force received by the workpiece 5 during the clamping process; during this process, the host computer can control the working state of the electric guide rail 31 according to the real-time reading of the pressure sensor 22221, and then control the pressure received by the spring 212, so as to achieve the effect of controlling the clamping force of the clamping assembly 2 and avoid the situation that the workpiece 5 is damaged due to excessive clamping force.

[0070] In one of the solutions, a plurality of assembly threaded holes 13 are further provided at the position of the processing platform 1 surrounding the processing port 12.

[0071] It should be noted that the assembly threaded holes 13 can be used to install the fixed blocks 2221 at the top and bottom of the workpiece 5 to limit the top and bottom of the workpiece 5, which is convenient for processing the workpiece 5 during the subsequent clamping process.

[0072] During the operation of the present utility model, when the host computer controls the operation of the electric guide rail 31, the host computer will obtain and process the data of the pressure sensor 22221 and the infrared sensor (not shown) in real time. By processing the data of the pressure sensor 22221, the clamping force of the clamping assembly 2 is obtained, and by processing the data of the infrared sensor (not shown), the result of whether there is a workpiece 5 on the processing platform 1 is obtained. When there is a workpiece 5 on the processing platform 1, a working signal is transmitted to the PLC. The PLC sends a control signal to the electric guide rail 31 according to the processed signal to control the moving direction and moving distance of the electric guide rail 31. By controlling the moving direction and moving distance of the electric guide rail 31, the mounting block 34 can drive the lead screw to move, and then synchronously drive the movable part 222 to move towards the fixed part 221. When the fixed part 221 fits the workpiece 5 and continues to move, the pressure received by the spring 212 gradually increases. The pressure sensor 22221 transmits data to the host computer in real time. The host computer makes corresponding adjustments to the movement of the electric guide rail 31 according to the data received from the pressure sensor 22221 in real time, and then adjusts the pressure received by the spring 212 in real time to control the clamping force of the clamping assembly 2 on the workpiece 5 as a whole. Thus, the real-time monitoring and adjustment of the clamping force are completed, avoiding the situation that the driving assembly 3 drives the clamping assembly 2 to excessively squeeze the workpiece 5 and cause damage to the workpiece 5.

[0073] In addition, in the existing flexible fixture equipment, the clamping degree of the clamping assembly 2 is preset and fixed. However, the processable range of the present utility model is not limited to workpieces 5 of a certain fixed size. Based on the fact that the present utility model can realize the real-time monitoring and adjustment of the clamping force of the clamping assembly 2, the present utility model also has certain advantages in terms of the processing size limit of the workpiece 5 compared with conventional flexible fixture equipment.

[0074] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A flexible automatic clamp structure, characterized in that: include A processing platform is used to provide support for the workpiece; A clamping assembly, used for clamping the workpiece on the processing platform; A driving assembly, used for driving the clamping assembly to move horizontally on the processing platform; A processing base, used to provide support for the horizontal movement required for the driving assembly to drive the clamping assembly, and to support the processing workpiece; The host computer is used to control the working status of the driving component and the clamping component; The processing platform and the driving assembly are both mounted on the processing base, and the clamping assembly is mounted on the driving assembly; The driving assembly and the clamping assembly are both connected to the host computer.

2. The flexible automatic clamp structure according to claim 1, characterized in that: The driving assembly includes an electric guide rail, a slider is movably connected to the electric guide rail, a movable seat is installed on the slider, the movable seat moves on the electric guide rail following the slider, and a mounting block for mounting the clamping assembly is provided on the movable seat; the electric guide rail is electrically connected to the upper computer, and the electric guide rail is connected to an external power supply device.

3. The flexible automatic clamp structure according to claim 2, characterized in that: The processing platform is provided with an installation opening for accommodating the clamping assembly and a processing opening for processing the workpiece; The clamping assembly includes a fastening component and a clamping component, the fastening component is a screw rod, the clamping component includes a fixed part for limiting the processing workpiece and a movable part for fastening the processing workpiece, the fixed part is installed on one side of the processing port, and the movable part is installed on the screw rod; One end of the screw rod passes through the mounting block, and the other end of the screw rod is fixedly connected to a side of the movable part away from the fixed part; A nut is movably mounted on the screw rod, and a spring is arranged between the nut and a side of the movable part away from the fixed part.

4. The flexible automatic clamp structure according to claim 3, characterized in that: The processing base is provided with an expansion support plate at a position corresponding to the processing opening.

5. The flexible automatic clamp structure according to claim 3, characterized in that: A fixing threaded hole is provided on the fixing part, and a platform threaded hole corresponding to the fixing threaded hole is provided at a position of the processing platform corresponding to the fixing part. The internal threads of the fixing threaded hole and the platform threaded hole are the same, and the fixing threaded hole and the platform threaded hole are connected by bolts. The fixing part is fixedly installed on one side of the processing port by bolts in conjunction with the fixing threaded hole and the platform threaded hole.

6. The flexible automatic clamp structure according to claim 3, characterized in that: The movable part comprises a fixed block and an elastic block which are connected to each other. The elastic block is fixedly connected to one side of the fixed block close to the workpiece, and the other side of the fixed block is fixedly connected to the screw rod.

7. The flexible automatic clamp structure according to claim 6, characterized in that: A pressure sensor is provided on one side of the elastic block close to the fixing portion, and the pressure sensor is wirelessly connected to the host computer.

8. The flexible automatic clamp structure according to claim 6, characterized in that: The elastic block and the fixing portion are both made of flexible non-metallic materials.

9. The flexible automatic clamp structure according to claim 4, characterized in that: A support block is installed on the expansion support plate. The support block is arranged on the expansion support plate corresponding to the center of the processing port. An infrared sensor is arranged on the top of the support block. The infrared sensor is wirelessly connected to the host computer.

10. The flexible automatic clamp structure according to claim 3, characterized in that: The processing platform is also provided with a plurality of assembly threaded holes around the processing opening.

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